diff options
Diffstat (limited to 'compiler')
151 files changed, 4021 insertions, 2311 deletions
diff --git a/compiler/rustc_ast/src/attr/mod.rs b/compiler/rustc_ast/src/attr/mod.rs index 0684163617f..d5c9fc960c8 100644 --- a/compiler/rustc_ast/src/attr/mod.rs +++ b/compiler/rustc_ast/src/attr/mod.rs @@ -13,6 +13,7 @@ use crate::util::literal::escape_string_symbol; use rustc_index::bit_set::GrowableBitSet; use rustc_span::symbol::{sym, Ident, Symbol}; use rustc_span::Span; +use smallvec::{smallvec, SmallVec}; use std::iter; use std::sync::atomic::{AtomicU32, Ordering}; use thin_vec::{thin_vec, ThinVec}; @@ -87,10 +88,20 @@ impl Attribute { AttrKind::DocComment(..) => None, } } + pub fn name_or_empty(&self) -> Symbol { self.ident().unwrap_or_else(Ident::empty).name } + pub fn path(&self) -> SmallVec<[Symbol; 1]> { + match &self.kind { + AttrKind::Normal(normal) => { + normal.item.path.segments.iter().map(|s| s.ident.name).collect() + } + AttrKind::DocComment(..) => smallvec![sym::doc], + } + } + #[inline] pub fn has_name(&self, name: Symbol) -> bool { match &self.kind { diff --git a/compiler/rustc_ast/src/ptr.rs b/compiler/rustc_ast/src/ptr.rs index e22a523dbc3..34c539ea16b 100644 --- a/compiler/rustc_ast/src/ptr.rs +++ b/compiler/rustc_ast/src/ptr.rs @@ -184,7 +184,7 @@ impl<'a, T> IntoIterator for &'a P<[T]> { type Item = &'a T; type IntoIter = slice::Iter<'a, T>; fn into_iter(self) -> Self::IntoIter { - self.ptr.into_iter() + self.ptr.iter() } } diff --git a/compiler/rustc_ast/src/util/classify.rs b/compiler/rustc_ast/src/util/classify.rs index f6e9e1a87c4..382c903625f 100644 --- a/compiler/rustc_ast/src/util/classify.rs +++ b/compiler/rustc_ast/src/util/classify.rs @@ -81,8 +81,17 @@ pub fn expr_requires_semi_to_be_stmt(e: &ast::Expr) -> bool { } } +pub enum TrailingBrace<'a> { + /// Trailing brace in a macro call, like the one in `x as *const brace! {}`. + /// We will suggest changing the macro call to a different delimiter. + MacCall(&'a ast::MacCall), + /// Trailing brace in any other expression, such as `a + B {}`. We will + /// suggest wrapping the innermost expression in parentheses: `a + (B {})`. + Expr(&'a ast::Expr), +} + /// If an expression ends with `}`, returns the innermost expression ending in the `}` -pub fn expr_trailing_brace(mut expr: &ast::Expr) -> Option<&ast::Expr> { +pub fn expr_trailing_brace(mut expr: &ast::Expr) -> Option<TrailingBrace<'_>> { loop { match &expr.kind { AddrOf(_, _, e) @@ -111,10 +120,14 @@ pub fn expr_trailing_brace(mut expr: &ast::Expr) -> Option<&ast::Expr> { | Struct(..) | TryBlock(..) | While(..) - | ConstBlock(_) => break Some(expr), + | ConstBlock(_) => break Some(TrailingBrace::Expr(expr)), + + Cast(_, ty) => { + break type_trailing_braced_mac_call(ty).map(TrailingBrace::MacCall); + } MacCall(mac) => { - break (mac.args.delim == Delimiter::Brace).then_some(expr); + break (mac.args.delim == Delimiter::Brace).then_some(TrailingBrace::MacCall(mac)); } InlineAsm(_) | OffsetOf(_, _) | IncludedBytes(_) | FormatArgs(_) => { @@ -131,7 +144,6 @@ pub fn expr_trailing_brace(mut expr: &ast::Expr) -> Option<&ast::Expr> { | MethodCall(_) | Tup(_) | Lit(_) - | Cast(_, _) | Type(_, _) | Await(_, _) | Field(_, _) @@ -148,3 +160,78 @@ pub fn expr_trailing_brace(mut expr: &ast::Expr) -> Option<&ast::Expr> { } } } + +/// If the type's last token is `}`, it must be due to a braced macro call, such +/// as in `*const brace! { ... }`. Returns that trailing macro call. +fn type_trailing_braced_mac_call(mut ty: &ast::Ty) -> Option<&ast::MacCall> { + loop { + match &ty.kind { + ast::TyKind::MacCall(mac) => { + break (mac.args.delim == Delimiter::Brace).then_some(mac); + } + + ast::TyKind::Ptr(mut_ty) | ast::TyKind::Ref(_, mut_ty) => { + ty = &mut_ty.ty; + } + + ast::TyKind::BareFn(fn_ty) => match &fn_ty.decl.output { + ast::FnRetTy::Default(_) => break None, + ast::FnRetTy::Ty(ret) => ty = ret, + }, + + ast::TyKind::Path(_, path) => match path_return_type(path) { + Some(trailing_ty) => ty = trailing_ty, + None => break None, + }, + + ast::TyKind::TraitObject(bounds, _) | ast::TyKind::ImplTrait(_, bounds, _) => { + match bounds.last() { + Some(ast::GenericBound::Trait(bound, _)) => { + match path_return_type(&bound.trait_ref.path) { + Some(trailing_ty) => ty = trailing_ty, + None => break None, + } + } + Some(ast::GenericBound::Outlives(_)) | None => break None, + } + } + + ast::TyKind::Slice(..) + | ast::TyKind::Array(..) + | ast::TyKind::Never + | ast::TyKind::Tup(..) + | ast::TyKind::Paren(..) + | ast::TyKind::Typeof(..) + | ast::TyKind::Infer + | ast::TyKind::ImplicitSelf + | ast::TyKind::CVarArgs + | ast::TyKind::Pat(..) + | ast::TyKind::Dummy + | ast::TyKind::Err(..) => break None, + + // These end in brace, but cannot occur in a let-else statement. + // They are only parsed as fields of a data structure. For the + // purpose of denying trailing braces in the expression of a + // let-else, we can disregard these. + ast::TyKind::AnonStruct(..) | ast::TyKind::AnonUnion(..) => break None, + } + } +} + +/// Returns the trailing return type in the given path, if it has one. +/// +/// ```ignore (illustrative) +/// ::std::ops::FnOnce(&str) -> fn() -> *const c_void +/// ^^^^^^^^^^^^^^^^^^^^^ +/// ``` +fn path_return_type(path: &ast::Path) -> Option<&ast::Ty> { + let last_segment = path.segments.last()?; + let args = last_segment.args.as_ref()?; + match &**args { + ast::GenericArgs::Parenthesized(args) => match &args.output { + ast::FnRetTy::Default(_) => None, + ast::FnRetTy::Ty(ret) => Some(ret), + }, + ast::GenericArgs::AngleBracketed(_) => None, + } +} diff --git a/compiler/rustc_ast_passes/messages.ftl b/compiler/rustc_ast_passes/messages.ftl index a3731e94276..31a184fe921 100644 --- a/compiler/rustc_ast_passes/messages.ftl +++ b/compiler/rustc_ast_passes/messages.ftl @@ -55,9 +55,6 @@ ast_passes_const_without_body = ast_passes_constraint_on_negative_bound = associated type constraints not allowed on negative bounds -ast_passes_deprecated_where_clause_location = - where clause not allowed here - ast_passes_equality_in_where = equality constraints are not yet supported in `where` clauses .label = not supported .suggestion = if `{$ident}` is an associated type you're trying to set, use the associated type binding syntax @@ -80,8 +77,6 @@ ast_passes_extern_types_cannot = `type`s inside `extern` blocks cannot have {$de .suggestion = remove the {$remove_descr} .label = `extern` block begins here -ast_passes_extern_without_abi = extern declarations without an explicit ABI are deprecated - ast_passes_feature_on_non_nightly = `#![feature]` may not be used on the {$channel} release channel .suggestion = remove the attribute .stable_since = the feature `{$name}` has been stable since `{$since}` and no longer requires an attribute to enable diff --git a/compiler/rustc_ast_passes/src/ast_validation.rs b/compiler/rustc_ast_passes/src/ast_validation.rs index 9d07683f8d6..c57be3cdf35 100644 --- a/compiler/rustc_ast_passes/src/ast_validation.rs +++ b/compiler/rustc_ast_passes/src/ast_validation.rs @@ -27,7 +27,6 @@ use std::ops::{Deref, DerefMut}; use thin_vec::thin_vec; use crate::errors; -use crate::fluent_generated as fluent; /// Is `self` allowed semantically as the first parameter in an `FnDecl`? enum SelfSemantic { @@ -766,11 +765,10 @@ impl<'a> AstValidator<'a> { .span_to_snippet(span) .is_ok_and(|snippet| !snippet.starts_with("#[")) { - self.lint_buffer.buffer_lint_with_diagnostic( + self.lint_buffer.buffer_lint( MISSING_ABI, id, span, - fluent::ast_passes_extern_without_abi, BuiltinLintDiag::MissingAbi(span, abi::Abi::FALLBACK), ) } @@ -1428,17 +1426,15 @@ impl<'a> Visitor<'a> for AstValidator<'a> { Self::check_decl_no_pat(&sig.decl, |span, ident, mut_ident| { if mut_ident && matches!(ctxt, FnCtxt::Assoc(_)) { if let Some(ident) = ident { - let msg = match ctxt { - FnCtxt::Foreign => fluent::ast_passes_pattern_in_foreign, - _ => fluent::ast_passes_pattern_in_bodiless, - }; - let diag = BuiltinLintDiag::PatternsInFnsWithoutBody(span, ident); - self.lint_buffer.buffer_lint_with_diagnostic( + self.lint_buffer.buffer_lint( PATTERNS_IN_FNS_WITHOUT_BODY, id, span, - msg, - diag, + BuiltinLintDiag::PatternsInFnsWithoutBody { + span, + ident, + is_foreign: matches!(ctxt, FnCtxt::Foreign), + }, ) } } else { @@ -1510,12 +1506,11 @@ impl<'a> Visitor<'a> for AstValidator<'a> { Some((right, snippet)) } }; - self.lint_buffer.buffer_lint_with_diagnostic( + self.lint_buffer.buffer_lint( DEPRECATED_WHERE_CLAUSE_LOCATION, item.id, err.span, - fluent::ast_passes_deprecated_where_clause_location, - BuiltinLintDiag::DeprecatedWhereclauseLocation(sugg), + BuiltinLintDiag::DeprecatedWhereclauseLocation(err.span, sugg), ); } diff --git a/compiler/rustc_ast_passes/src/errors.rs b/compiler/rustc_ast_passes/src/errors.rs index 25a125f8393..a95a7bdaf6d 100644 --- a/compiler/rustc_ast_passes/src/errors.rs +++ b/compiler/rustc_ast_passes/src/errors.rs @@ -669,6 +669,7 @@ pub struct ConstAndCVariadic { #[derive(Diagnostic)] #[diag(ast_passes_pattern_in_foreign, code = E0130)] +// FIXME: deduplicate with rustc_lint (`BuiltinLintDiag::PatternsInFnsWithoutBody`) pub struct PatternInForeign { #[primary_span] #[label] @@ -677,6 +678,7 @@ pub struct PatternInForeign { #[derive(Diagnostic)] #[diag(ast_passes_pattern_in_bodiless, code = E0642)] +// FIXME: deduplicate with rustc_lint (`BuiltinLintDiag::PatternsInFnsWithoutBody`) pub struct PatternInBodiless { #[primary_span] #[label] diff --git a/compiler/rustc_attr/src/builtin.rs b/compiler/rustc_attr/src/builtin.rs index c08bf287733..5113c5adc8f 100644 --- a/compiler/rustc_attr/src/builtin.rs +++ b/compiler/rustc_attr/src/builtin.rs @@ -528,15 +528,10 @@ pub fn cfg_matches( try_gate_cfg(cfg.name, cfg.span, sess, features); match sess.psess.check_config.expecteds.get(&cfg.name) { Some(ExpectedValues::Some(values)) if !values.contains(&cfg.value) => { - sess.psess.buffer_lint_with_diagnostic( + sess.psess.buffer_lint( UNEXPECTED_CFGS, cfg.span, lint_node_id, - if let Some(value) = cfg.value { - format!("unexpected `cfg` condition value: `{value}`") - } else { - format!("unexpected `cfg` condition value: (none)") - }, BuiltinLintDiag::UnexpectedCfgValue( (cfg.name, cfg.name_span), cfg.value.map(|v| (v, cfg.value_span.unwrap())), @@ -544,11 +539,10 @@ pub fn cfg_matches( ); } None if sess.psess.check_config.exhaustive_names => { - sess.psess.buffer_lint_with_diagnostic( + sess.psess.buffer_lint( UNEXPECTED_CFGS, cfg.span, lint_node_id, - format!("unexpected `cfg` condition name: `{}`", cfg.name), BuiltinLintDiag::UnexpectedCfgName( (cfg.name, cfg.name_span), cfg.value.map(|v| (v, cfg.value_span.unwrap())), diff --git a/compiler/rustc_borrowck/src/diagnostics/mutability_errors.rs b/compiler/rustc_borrowck/src/diagnostics/mutability_errors.rs index 35017b9e6b5..79b48508585 100644 --- a/compiler/rustc_borrowck/src/diagnostics/mutability_errors.rs +++ b/compiler/rustc_borrowck/src/diagnostics/mutability_errors.rs @@ -992,7 +992,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> { } } - if look_at_return && hir.get_return_block(closure_id).is_some() { + if look_at_return && hir.get_fn_id_for_return_block(closure_id).is_some() { // ...otherwise we are probably in the tail expression of the function, point at the // return type. match self.infcx.tcx.hir_node_by_def_id(hir.get_parent_item(fn_call_id).def_id) { diff --git a/compiler/rustc_borrowck/src/type_check/constraint_conversion.rs b/compiler/rustc_borrowck/src/type_check/constraint_conversion.rs index 5aa8fe21381..b23ad2e1584 100644 --- a/compiler/rustc_borrowck/src/type_check/constraint_conversion.rs +++ b/compiler/rustc_borrowck/src/type_check/constraint_conversion.rs @@ -136,7 +136,7 @@ impl<'a, 'tcx> ConstraintConversion<'a, 'tcx> { fn convert( &mut self, - predicate: ty::OutlivesPredicate<ty::GenericArg<'tcx>, ty::Region<'tcx>>, + predicate: ty::OutlivesPredicate<'tcx, ty::GenericArg<'tcx>>, constraint_category: ConstraintCategory<'tcx>, ) { debug!("generate: constraints at: {:#?}", self.locations); @@ -276,7 +276,7 @@ impl<'a, 'tcx> ConstraintConversion<'a, 'tcx> { &self, ty: Ty<'tcx>, next_outlives_predicates: &mut Vec<( - ty::OutlivesPredicate<ty::GenericArg<'tcx>, ty::Region<'tcx>>, + ty::OutlivesPredicate<'tcx, ty::GenericArg<'tcx>>, ConstraintCategory<'tcx>, )>, ) -> Ty<'tcx> { diff --git a/compiler/rustc_builtin_macros/messages.ftl b/compiler/rustc_builtin_macros/messages.ftl index 0f158990319..a3d6a1c7360 100644 --- a/compiler/rustc_builtin_macros/messages.ftl +++ b/compiler/rustc_builtin_macros/messages.ftl @@ -247,5 +247,3 @@ builtin_macros_unexpected_lit = expected path to a trait, found literal .label = not a trait .str_lit = try using `#[derive({$sym})]` .other = for example, write `#[derive(Debug)]` for `Debug` - -builtin_macros_unnameable_test_items = cannot test inner items diff --git a/compiler/rustc_builtin_macros/src/asm.rs b/compiler/rustc_builtin_macros/src/asm.rs index 49b1b8cf992..1a7961bf70c 100644 --- a/compiler/rustc_builtin_macros/src/asm.rs +++ b/compiler/rustc_builtin_macros/src/asm.rs @@ -1,6 +1,7 @@ use crate::errors; use crate::util::expr_to_spanned_string; use ast::token::IdentIsRaw; +use lint::BuiltinLintDiag; use rustc_ast as ast; use rustc_ast::ptr::P; use rustc_ast::token::{self, Delimiter}; @@ -513,7 +514,7 @@ fn expand_preparsed_asm( lint::builtin::BAD_ASM_STYLE, find_span(".intel_syntax"), ecx.current_expansion.lint_node_id, - "avoid using `.intel_syntax`, Intel syntax is the default", + BuiltinLintDiag::AvoidUsingIntelSyntax, ); } if template_str.contains(".att_syntax") { @@ -521,7 +522,7 @@ fn expand_preparsed_asm( lint::builtin::BAD_ASM_STYLE, find_span(".att_syntax"), ecx.current_expansion.lint_node_id, - "avoid using `.att_syntax`, prefer using `options(att_syntax)` instead", + BuiltinLintDiag::AvoidUsingAttSyntax, ); } } diff --git a/compiler/rustc_builtin_macros/src/deriving/generic/mod.rs b/compiler/rustc_builtin_macros/src/deriving/generic/mod.rs index 46949f731aa..217fa5ff9f1 100644 --- a/compiler/rustc_builtin_macros/src/deriving/generic/mod.rs +++ b/compiler/rustc_builtin_macros/src/deriving/generic/mod.rs @@ -1621,14 +1621,13 @@ impl<'a> TraitDef<'a> { }; if let Some(ty) = exception { - cx.sess.psess.buffer_lint_with_diagnostic( + cx.sess.psess.buffer_lint( BYTE_SLICE_IN_PACKED_STRUCT_WITH_DERIVE, sp, ast::CRATE_NODE_ID, - format!( - "{ty} slice in a packed struct that derives a built-in trait" - ), - rustc_lint_defs::BuiltinLintDiag::ByteSliceInPackedStructWithDerive, + rustc_lint_defs::BuiltinLintDiag::ByteSliceInPackedStructWithDerive { + ty: ty.to_string(), + }, ); } else { // Wrap the expression in `{...}`, causing a copy. diff --git a/compiler/rustc_builtin_macros/src/format.rs b/compiler/rustc_builtin_macros/src/format.rs index a5fc74f1d66..5cb0407bd59 100644 --- a/compiler/rustc_builtin_macros/src/format.rs +++ b/compiler/rustc_builtin_macros/src/format.rs @@ -556,7 +556,6 @@ fn make_format_args( let arg_name = args.explicit_args()[index].kind.ident().unwrap(); ecx.buffered_early_lint.push(BufferedEarlyLint { span: arg_name.span.into(), - msg: format!("named argument `{}` is not used by name", arg_name.name).into(), node_id: rustc_ast::CRATE_NODE_ID, lint_id: LintId::of(NAMED_ARGUMENTS_USED_POSITIONALLY), diagnostic: BuiltinLintDiag::NamedArgumentUsedPositionally { diff --git a/compiler/rustc_builtin_macros/src/source_util.rs b/compiler/rustc_builtin_macros/src/source_util.rs index 47b2ee975ca..29e991525a9 100644 --- a/compiler/rustc_builtin_macros/src/source_util.rs +++ b/compiler/rustc_builtin_macros/src/source_util.rs @@ -11,6 +11,7 @@ use rustc_expand::base::{ resolve_path, DummyResult, ExpandResult, ExtCtxt, MacEager, MacResult, MacroExpanderResult, }; use rustc_expand::module::DirOwnership; +use rustc_lint_defs::BuiltinLintDiag; use rustc_parse::new_parser_from_file; use rustc_parse::parser::{ForceCollect, Parser}; use rustc_session::lint::builtin::INCOMPLETE_INCLUDE; @@ -147,7 +148,7 @@ pub(crate) fn expand_include<'cx>( INCOMPLETE_INCLUDE, self.p.token.span, self.node_id, - "include macro expected single expression in source", + BuiltinLintDiag::IncompleteInclude, ); } Some(expr) diff --git a/compiler/rustc_builtin_macros/src/test_harness.rs b/compiler/rustc_builtin_macros/src/test_harness.rs index 8cf431482ff..38ac2f15fe7 100644 --- a/compiler/rustc_builtin_macros/src/test_harness.rs +++ b/compiler/rustc_builtin_macros/src/test_harness.rs @@ -9,6 +9,7 @@ use rustc_ast::{attr, ModKind}; use rustc_expand::base::{ExtCtxt, ResolverExpand}; use rustc_expand::expand::{AstFragment, ExpansionConfig}; use rustc_feature::Features; +use rustc_lint_defs::BuiltinLintDiag; use rustc_session::lint::builtin::UNNAMEABLE_TEST_ITEMS; use rustc_session::Session; use rustc_span::hygiene::{AstPass, SyntaxContext, Transparency}; @@ -163,7 +164,7 @@ impl<'a> Visitor<'a> for InnerItemLinter<'_> { UNNAMEABLE_TEST_ITEMS, attr.span, i.id, - crate::fluent_generated::builtin_macros_unnameable_test_items, + BuiltinLintDiag::UnnameableTestItems, ); } } diff --git a/compiler/rustc_builtin_macros/src/util.rs b/compiler/rustc_builtin_macros/src/util.rs index 8dc7bc14ec3..652e34268ea 100644 --- a/compiler/rustc_builtin_macros/src/util.rs +++ b/compiler/rustc_builtin_macros/src/util.rs @@ -5,7 +5,7 @@ use rustc_errors::{Applicability, Diag, ErrorGuaranteed}; use rustc_expand::base::{Annotatable, ExpandResult, ExtCtxt}; use rustc_expand::expand::AstFragment; use rustc_feature::AttributeTemplate; -use rustc_lint_defs::builtin::DUPLICATE_MACRO_ATTRIBUTES; +use rustc_lint_defs::{builtin::DUPLICATE_MACRO_ATTRIBUTES, BuiltinLintDiag}; use rustc_parse::{parser, validate_attr}; use rustc_session::errors::report_lit_error; use rustc_span::{BytePos, Span, Symbol}; @@ -46,7 +46,7 @@ pub(crate) fn warn_on_duplicate_attribute(ecx: &ExtCtxt<'_>, item: &Annotatable, DUPLICATE_MACRO_ATTRIBUTES, attr.span, ecx.current_expansion.lint_node_id, - "duplicated attribute", + BuiltinLintDiag::DuplicateMacroAttribute, ); } } diff --git a/compiler/rustc_codegen_cranelift/src/intrinsics/simd.rs b/compiler/rustc_codegen_cranelift/src/intrinsics/simd.rs index 452b5988dab..b17f191ce26 100644 --- a/compiler/rustc_codegen_cranelift/src/intrinsics/simd.rs +++ b/compiler/rustc_codegen_cranelift/src/intrinsics/simd.rs @@ -348,6 +348,7 @@ pub(super) fn codegen_simd_intrinsic_call<'tcx>( | sym::simd_bswap | sym::simd_bitreverse | sym::simd_ctlz + | sym::simd_ctpop | sym::simd_cttz => { intrinsic_args!(fx, args => (a); intrinsic); @@ -367,6 +368,7 @@ pub(super) fn codegen_simd_intrinsic_call<'tcx>( (ty::Uint(_) | ty::Int(_), sym::simd_bswap) => fx.bcx.ins().bswap(lane), (ty::Uint(_) | ty::Int(_), sym::simd_bitreverse) => fx.bcx.ins().bitrev(lane), (ty::Uint(_) | ty::Int(_), sym::simd_ctlz) => fx.bcx.ins().clz(lane), + (ty::Uint(_) | ty::Int(_), sym::simd_ctpop) => fx.bcx.ins().popcnt(lane), (ty::Uint(_) | ty::Int(_), sym::simd_cttz) => fx.bcx.ins().ctz(lane), _ => unreachable!(), diff --git a/compiler/rustc_codegen_gcc/src/intrinsic/simd.rs b/compiler/rustc_codegen_gcc/src/intrinsic/simd.rs index 0c7cffbe730..1625e6ecdb7 100644 --- a/compiler/rustc_codegen_gcc/src/intrinsic/simd.rs +++ b/compiler/rustc_codegen_gcc/src/intrinsic/simd.rs @@ -14,6 +14,7 @@ use rustc_codegen_ssa::mir::operand::OperandRef; use rustc_codegen_ssa::mir::place::PlaceRef; use rustc_codegen_ssa::traits::{BaseTypeMethods, BuilderMethods}; use rustc_hir as hir; +use rustc_middle::mir::BinOp; use rustc_middle::span_bug; use rustc_middle::ty::layout::HasTyCtxt; use rustc_middle::ty::{self, Ty}; @@ -122,12 +123,12 @@ pub fn generic_simd_intrinsic<'a, 'gcc, 'tcx>( let in_ty = arg_tys[0]; let comparison = match name { - sym::simd_eq => Some(hir::BinOpKind::Eq), - sym::simd_ne => Some(hir::BinOpKind::Ne), - sym::simd_lt => Some(hir::BinOpKind::Lt), - sym::simd_le => Some(hir::BinOpKind::Le), - sym::simd_gt => Some(hir::BinOpKind::Gt), - sym::simd_ge => Some(hir::BinOpKind::Ge), + sym::simd_eq => Some(BinOp::Eq), + sym::simd_ne => Some(BinOp::Ne), + sym::simd_lt => Some(BinOp::Lt), + sym::simd_le => Some(BinOp::Le), + sym::simd_gt => Some(BinOp::Gt), + sym::simd_ge => Some(BinOp::Ge), _ => None, }; diff --git a/compiler/rustc_codegen_llvm/src/intrinsic.rs b/compiler/rustc_codegen_llvm/src/intrinsic.rs index c0a1208a8c7..897132a8e9c 100644 --- a/compiler/rustc_codegen_llvm/src/intrinsic.rs +++ b/compiler/rustc_codegen_llvm/src/intrinsic.rs @@ -14,6 +14,7 @@ use rustc_codegen_ssa::mir::operand::{OperandRef, OperandValue}; use rustc_codegen_ssa::mir::place::PlaceRef; use rustc_codegen_ssa::traits::*; use rustc_hir as hir; +use rustc_middle::mir::BinOp; use rustc_middle::ty::layout::{FnAbiOf, HasTyCtxt, LayoutOf}; use rustc_middle::ty::{self, GenericArgsRef, Ty}; use rustc_middle::{bug, span_bug}; @@ -1104,12 +1105,12 @@ fn generic_simd_intrinsic<'ll, 'tcx>( let in_ty = arg_tys[0]; let comparison = match name { - sym::simd_eq => Some(hir::BinOpKind::Eq), - sym::simd_ne => Some(hir::BinOpKind::Ne), - sym::simd_lt => Some(hir::BinOpKind::Lt), - sym::simd_le => Some(hir::BinOpKind::Le), - sym::simd_gt => Some(hir::BinOpKind::Gt), - sym::simd_ge => Some(hir::BinOpKind::Ge), + sym::simd_eq => Some(BinOp::Eq), + sym::simd_ne => Some(BinOp::Ne), + sym::simd_lt => Some(BinOp::Lt), + sym::simd_le => Some(BinOp::Le), + sym::simd_gt => Some(BinOp::Gt), + sym::simd_ge => Some(BinOp::Ge), _ => None, }; @@ -2336,7 +2337,10 @@ fn generic_simd_intrinsic<'ll, 'tcx>( } // Unary integer intrinsics - if matches!(name, sym::simd_bswap | sym::simd_bitreverse | sym::simd_ctlz | sym::simd_cttz) { + if matches!( + name, + sym::simd_bswap | sym::simd_bitreverse | sym::simd_ctlz | sym::simd_ctpop | sym::simd_cttz + ) { let vec_ty = bx.cx.type_vector( match *in_elem.kind() { ty::Int(i) => bx.cx.type_int_from_ty(i), @@ -2354,31 +2358,38 @@ fn generic_simd_intrinsic<'ll, 'tcx>( sym::simd_bswap => "bswap", sym::simd_bitreverse => "bitreverse", sym::simd_ctlz => "ctlz", + sym::simd_ctpop => "ctpop", sym::simd_cttz => "cttz", _ => unreachable!(), }; let int_size = in_elem.int_size_and_signed(bx.tcx()).0.bits(); let llvm_intrinsic = &format!("llvm.{}.v{}i{}", intrinsic_name, in_len, int_size,); - return if name == sym::simd_bswap && int_size == 8 { + return match name { // byte swap is no-op for i8/u8 - Ok(args[0].immediate()) - } else if matches!(name, sym::simd_ctlz | sym::simd_cttz) { - let fn_ty = bx.type_func(&[vec_ty, bx.type_i1()], vec_ty); - let f = bx.declare_cfn(llvm_intrinsic, llvm::UnnamedAddr::No, fn_ty); - Ok(bx.call( - fn_ty, - None, - None, - f, - &[args[0].immediate(), bx.const_int(bx.type_i1(), 0)], - None, - None, - )) - } else { - let fn_ty = bx.type_func(&[vec_ty], vec_ty); - let f = bx.declare_cfn(llvm_intrinsic, llvm::UnnamedAddr::No, fn_ty); - Ok(bx.call(fn_ty, None, None, f, &[args[0].immediate()], None, None)) + sym::simd_bswap if int_size == 8 => Ok(args[0].immediate()), + sym::simd_ctlz | sym::simd_cttz => { + // for the (int, i1 immediate) pair, the second arg adds `(0, true) => poison` + let fn_ty = bx.type_func(&[vec_ty, bx.type_i1()], vec_ty); + let dont_poison_on_zero = bx.const_int(bx.type_i1(), 0); + let f = bx.declare_cfn(llvm_intrinsic, llvm::UnnamedAddr::No, fn_ty); + Ok(bx.call( + fn_ty, + None, + None, + f, + &[args[0].immediate(), dont_poison_on_zero], + None, + None, + )) + } + sym::simd_bswap | sym::simd_bitreverse | sym::simd_ctpop => { + // simple unary argument cases + let fn_ty = bx.type_func(&[vec_ty], vec_ty); + let f = bx.declare_cfn(llvm_intrinsic, llvm::UnnamedAddr::No, fn_ty); + Ok(bx.call(fn_ty, None, None, f, &[args[0].immediate()], None, None)) + } + _ => unreachable!(), }; } diff --git a/compiler/rustc_codegen_ssa/src/back/link.rs b/compiler/rustc_codegen_ssa/src/back/link.rs index 6939674ce9d..37b8f81ad94 100644 --- a/compiler/rustc_codegen_ssa/src/back/link.rs +++ b/compiler/rustc_codegen_ssa/src/back/link.rs @@ -1230,7 +1230,10 @@ fn add_sanitizer_libraries( if sanitizer.contains(SanitizerSet::DATAFLOW) { link_sanitizer_runtime(sess, flavor, linker, "dfsan"); } - if sanitizer.contains(SanitizerSet::LEAK) { + if sanitizer.contains(SanitizerSet::LEAK) + && !sanitizer.contains(SanitizerSet::ADDRESS) + && !sanitizer.contains(SanitizerSet::HWADDRESS) + { link_sanitizer_runtime(sess, flavor, linker, "lsan"); } if sanitizer.contains(SanitizerSet::MEMORY) { diff --git a/compiler/rustc_codegen_ssa/src/base.rs b/compiler/rustc_codegen_ssa/src/base.rs index 877e5b75912..66bc5b6606d 100644 --- a/compiler/rustc_codegen_ssa/src/base.rs +++ b/compiler/rustc_codegen_ssa/src/base.rs @@ -20,7 +20,6 @@ use rustc_data_structures::fx::{FxHashMap, FxIndexSet}; use rustc_data_structures::profiling::{get_resident_set_size, print_time_passes_entry}; use rustc_data_structures::sync::par_map; use rustc_data_structures::unord::UnordMap; -use rustc_hir as hir; use rustc_hir::def_id::{DefId, LOCAL_CRATE}; use rustc_hir::lang_items::LangItem; use rustc_metadata::EncodedMetadata; @@ -30,6 +29,7 @@ use rustc_middle::middle::debugger_visualizer::{DebuggerVisualizerFile, Debugger use rustc_middle::middle::exported_symbols; use rustc_middle::middle::exported_symbols::SymbolExportKind; use rustc_middle::middle::lang_items; +use rustc_middle::mir::BinOp; use rustc_middle::mir::mono::{CodegenUnit, CodegenUnitNameBuilder, MonoItem}; use rustc_middle::query::Providers; use rustc_middle::ty::layout::{HasTyCtxt, LayoutOf, TyAndLayout}; @@ -46,32 +46,32 @@ use std::time::{Duration, Instant}; use itertools::Itertools; -pub fn bin_op_to_icmp_predicate(op: hir::BinOpKind, signed: bool) -> IntPredicate { +pub fn bin_op_to_icmp_predicate(op: BinOp, signed: bool) -> IntPredicate { match op { - hir::BinOpKind::Eq => IntPredicate::IntEQ, - hir::BinOpKind::Ne => IntPredicate::IntNE, - hir::BinOpKind::Lt => { + BinOp::Eq => IntPredicate::IntEQ, + BinOp::Ne => IntPredicate::IntNE, + BinOp::Lt => { if signed { IntPredicate::IntSLT } else { IntPredicate::IntULT } } - hir::BinOpKind::Le => { + BinOp::Le => { if signed { IntPredicate::IntSLE } else { IntPredicate::IntULE } } - hir::BinOpKind::Gt => { + BinOp::Gt => { if signed { IntPredicate::IntSGT } else { IntPredicate::IntUGT } } - hir::BinOpKind::Ge => { + BinOp::Ge => { if signed { IntPredicate::IntSGE } else { @@ -86,14 +86,14 @@ pub fn bin_op_to_icmp_predicate(op: hir::BinOpKind, signed: bool) -> IntPredicat } } -pub fn bin_op_to_fcmp_predicate(op: hir::BinOpKind) -> RealPredicate { +pub fn bin_op_to_fcmp_predicate(op: BinOp) -> RealPredicate { match op { - hir::BinOpKind::Eq => RealPredicate::RealOEQ, - hir::BinOpKind::Ne => RealPredicate::RealUNE, - hir::BinOpKind::Lt => RealPredicate::RealOLT, - hir::BinOpKind::Le => RealPredicate::RealOLE, - hir::BinOpKind::Gt => RealPredicate::RealOGT, - hir::BinOpKind::Ge => RealPredicate::RealOGE, + BinOp::Eq => RealPredicate::RealOEQ, + BinOp::Ne => RealPredicate::RealUNE, + BinOp::Lt => RealPredicate::RealOLT, + BinOp::Le => RealPredicate::RealOLE, + BinOp::Gt => RealPredicate::RealOGT, + BinOp::Ge => RealPredicate::RealOGE, op => { bug!( "comparison_op_to_fcmp_predicate: expected comparison operator, \ @@ -110,7 +110,7 @@ pub fn compare_simd_types<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>( rhs: Bx::Value, t: Ty<'tcx>, ret_ty: Bx::Type, - op: hir::BinOpKind, + op: BinOp, ) -> Bx::Value { let signed = match t.kind() { ty::Float(_) => { diff --git a/compiler/rustc_codegen_ssa/src/lib.rs b/compiler/rustc_codegen_ssa/src/lib.rs index 4eb24d71009..66a7a2e090a 100644 --- a/compiler/rustc_codegen_ssa/src/lib.rs +++ b/compiler/rustc_codegen_ssa/src/lib.rs @@ -195,6 +195,7 @@ pub enum CodegenErrors { EmptyVersionNumber, EncodingVersionMismatch { version_array: String, rlink_version: u32 }, RustcVersionMismatch { rustc_version: String }, + CorruptFile, } pub fn provide(providers: &mut Providers) { @@ -265,7 +266,9 @@ impl CodegenResults { }); } - let mut decoder = MemDecoder::new(&data[4..], 0); + let Ok(mut decoder) = MemDecoder::new(&data[4..], 0) else { + return Err(CodegenErrors::CorruptFile); + }; let rustc_version = decoder.read_str(); if rustc_version != sess.cfg_version { return Err(CodegenErrors::RustcVersionMismatch { diff --git a/compiler/rustc_codegen_ssa/src/mir/rvalue.rs b/compiler/rustc_codegen_ssa/src/mir/rvalue.rs index 00b28cbd0c6..f9085f502d4 100644 --- a/compiler/rustc_codegen_ssa/src/mir/rvalue.rs +++ b/compiler/rustc_codegen_ssa/src/mir/rvalue.rs @@ -7,7 +7,6 @@ use crate::common::IntPredicate; use crate::traits::*; use crate::MemFlags; -use rustc_hir as hir; use rustc_middle::mir; use rustc_middle::ty::cast::{CastTy, IntTy}; use rustc_middle::ty::layout::{HasTyCtxt, LayoutOf, TyAndLayout}; @@ -896,9 +895,9 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> { | mir::BinOp::Le | mir::BinOp::Ge => { if is_float { - bx.fcmp(base::bin_op_to_fcmp_predicate(op.to_hir_binop()), lhs, rhs) + bx.fcmp(base::bin_op_to_fcmp_predicate(op), lhs, rhs) } else { - bx.icmp(base::bin_op_to_icmp_predicate(op.to_hir_binop(), is_signed), lhs, rhs) + bx.icmp(base::bin_op_to_icmp_predicate(op, is_signed), lhs, rhs) } } mir::BinOp::Cmp => { @@ -912,16 +911,16 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> { // `PartialOrd`, so only use it in debug for now. Once LLVM can handle it // better (see <https://github.com/llvm/llvm-project/issues/73417>), it'll // be worth trying it in optimized builds as well. - let is_gt = bx.icmp(pred(hir::BinOpKind::Gt), lhs, rhs); + let is_gt = bx.icmp(pred(mir::BinOp::Gt), lhs, rhs); let gtext = bx.zext(is_gt, bx.type_i8()); - let is_lt = bx.icmp(pred(hir::BinOpKind::Lt), lhs, rhs); + let is_lt = bx.icmp(pred(mir::BinOp::Lt), lhs, rhs); let ltext = bx.zext(is_lt, bx.type_i8()); bx.unchecked_ssub(gtext, ltext) } else { // These operations are those expected by `tests/codegen/integer-cmp.rs`, // from <https://github.com/rust-lang/rust/pull/63767>. - let is_lt = bx.icmp(pred(hir::BinOpKind::Lt), lhs, rhs); - let is_ne = bx.icmp(pred(hir::BinOpKind::Ne), lhs, rhs); + let is_lt = bx.icmp(pred(mir::BinOp::Lt), lhs, rhs); + let is_ne = bx.icmp(pred(mir::BinOp::Ne), lhs, rhs); let ge = bx.select( is_ne, bx.cx().const_i8(Ordering::Greater as i8), diff --git a/compiler/rustc_const_eval/src/const_eval/machine.rs b/compiler/rustc_const_eval/src/const_eval/machine.rs index 315d4c15a9b..3cd60271a83 100644 --- a/compiler/rustc_const_eval/src/const_eval/machine.rs +++ b/compiler/rustc_const_eval/src/const_eval/machine.rs @@ -25,9 +25,9 @@ use rustc_target::spec::abi::Abi as CallAbi; use crate::errors::{LongRunning, LongRunningWarn}; use crate::fluent_generated as fluent; use crate::interpret::{ - self, compile_time_machine, err_ub, throw_exhaust, throw_inval, throw_ub_custom, + self, compile_time_machine, err_ub, throw_exhaust, throw_inval, throw_ub_custom, throw_unsup, throw_unsup_format, AllocId, AllocRange, ConstAllocation, CtfeProvenance, FnArg, FnVal, Frame, - ImmTy, InterpCx, InterpResult, MPlaceTy, OpTy, Pointer, PointerArithmetic, Scalar, + GlobalAlloc, ImmTy, InterpCx, InterpResult, MPlaceTy, OpTy, Pointer, PointerArithmetic, Scalar, }; use super::error::*; @@ -759,11 +759,21 @@ impl<'mir, 'tcx> interpret::Machine<'mir, 'tcx> for CompileTimeInterpreter<'mir, ecx: &InterpCx<'mir, 'tcx, Self>, alloc_id: AllocId, ) -> InterpResult<'tcx> { + // Check if this is the currently evaluated static. if Some(alloc_id) == ecx.machine.static_root_ids.map(|(id, _)| id) { - Err(ConstEvalErrKind::RecursiveStatic.into()) - } else { - Ok(()) + return Err(ConstEvalErrKind::RecursiveStatic.into()); } + // If this is another static, make sure we fire off the query to detect cycles. + // But only do that when checks for static recursion are enabled. + if ecx.machine.static_root_ids.is_some() { + if let Some(GlobalAlloc::Static(def_id)) = ecx.tcx.try_get_global_alloc(alloc_id) { + if ecx.tcx.is_foreign_item(def_id) { + throw_unsup!(ExternStatic(def_id)); + } + ecx.ctfe_query(|tcx| tcx.eval_static_initializer(def_id))?; + } + } + Ok(()) } } diff --git a/compiler/rustc_const_eval/src/interpret/intrinsics.rs b/compiler/rustc_const_eval/src/interpret/intrinsics.rs index 030ae942b80..e7a46bae57f 100644 --- a/compiler/rustc_const_eval/src/interpret/intrinsics.rs +++ b/compiler/rustc_const_eval/src/interpret/intrinsics.rs @@ -255,6 +255,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> { name = intrinsic_name, ); } + // This will always return 0. (a, b) } (Err(_), _) | (_, Err(_)) => { diff --git a/compiler/rustc_const_eval/src/interpret/memory.rs b/compiler/rustc_const_eval/src/interpret/memory.rs index 350fd480fba..737f2fd8bb9 100644 --- a/compiler/rustc_const_eval/src/interpret/memory.rs +++ b/compiler/rustc_const_eval/src/interpret/memory.rs @@ -413,6 +413,8 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> { /// to the allocation it points to. Supports both shared and mutable references, as the actual /// checking is offloaded to a helper closure. /// + /// `alloc_size` will only get called for non-zero-sized accesses. + /// /// Returns `None` if and only if the size is 0. fn check_and_deref_ptr<T>( &self, @@ -425,18 +427,19 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> { M::ProvenanceExtra, ) -> InterpResult<'tcx, (Size, Align, T)>, ) -> InterpResult<'tcx, Option<T>> { + // Everything is okay with size 0. + if size.bytes() == 0 { + return Ok(None); + } + Ok(match self.ptr_try_get_alloc_id(ptr) { Err(addr) => { - // We couldn't get a proper allocation. This is only okay if the access size is 0, - // and the address is not null. - if size.bytes() > 0 || addr == 0 { - throw_ub!(DanglingIntPointer(addr, msg)); - } - None + // We couldn't get a proper allocation. + throw_ub!(DanglingIntPointer(addr, msg)); } Ok((alloc_id, offset, prov)) => { let (alloc_size, _alloc_align, ret_val) = alloc_size(alloc_id, offset, prov)?; - // Test bounds. This also ensures non-null. + // Test bounds. // It is sufficient to check this for the end pointer. Also check for overflow! if offset.checked_add(size, &self.tcx).map_or(true, |end| end > alloc_size) { throw_ub!(PointerOutOfBounds { @@ -447,14 +450,8 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> { msg, }) } - // Ensure we never consider the null pointer dereferenceable. - if M::Provenance::OFFSET_IS_ADDR { - assert_ne!(ptr.addr(), Size::ZERO); - } - // We can still be zero-sized in this branch, in which case we have to - // return `None`. - if size.bytes() == 0 { None } else { Some(ret_val) } + Some(ret_val) } }) } @@ -641,16 +638,18 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> { size, CheckInAllocMsg::MemoryAccessTest, |alloc_id, offset, prov| { - if !self.memory.validation_in_progress.get() { - // We want to call the hook on *all* accesses that involve an AllocId, - // including zero-sized accesses. That means we have to do it here - // rather than below in the `Some` branch. - M::before_alloc_read(self, alloc_id)?; - } let alloc = self.get_alloc_raw(alloc_id)?; Ok((alloc.size(), alloc.align, (alloc_id, offset, prov, alloc))) }, )?; + // We want to call the hook on *all* accesses that involve an AllocId, including zero-sized + // accesses. That means we cannot rely on the closure above or the `Some` branch below. We + // do this after `check_and_deref_ptr` to ensure some basic sanity has already been checked. + if !self.memory.validation_in_progress.get() { + if let Ok((alloc_id, ..)) = self.ptr_try_get_alloc_id(ptr) { + M::before_alloc_read(self, alloc_id)?; + } + } if let Some((alloc_id, offset, prov, alloc)) = ptr_and_alloc { let range = alloc_range(offset, size); diff --git a/compiler/rustc_const_eval/src/interpret/validity.rs b/compiler/rustc_const_eval/src/interpret/validity.rs index 2bd4d9dc07a..e36d30184c8 100644 --- a/compiler/rustc_const_eval/src/interpret/validity.rs +++ b/compiler/rustc_const_eval/src/interpret/validity.rs @@ -434,6 +434,11 @@ impl<'rt, 'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValidityVisitor<'rt, 'mir, ' found_bytes: has.bytes() }, ); + // Make sure this is non-null. We checked dereferenceability above, but if `size` is zero + // that does not imply non-null. + if self.ecx.scalar_may_be_null(Scalar::from_maybe_pointer(place.ptr(), self.ecx))? { + throw_validation_failure!(self.path, NullPtr { ptr_kind }) + } // Do not allow pointers to uninhabited types. if place.layout.abi.is_uninhabited() { let ty = place.layout.ty; @@ -456,8 +461,8 @@ impl<'rt, 'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValidityVisitor<'rt, 'mir, ' // `!` is a ZST and we want to validate it. if let Ok((alloc_id, _offset, _prov)) = self.ecx.ptr_try_get_alloc_id(place.ptr()) { let mut skip_recursive_check = false; - let alloc_actual_mutbl = mutability(self.ecx, alloc_id); - if let GlobalAlloc::Static(did) = self.ecx.tcx.global_alloc(alloc_id) { + if let Some(GlobalAlloc::Static(did)) = self.ecx.tcx.try_get_global_alloc(alloc_id) + { let DefKind::Static { nested, .. } = self.ecx.tcx.def_kind(did) else { bug!() }; // Special handling for pointers to statics (irrespective of their type). assert!(!self.ecx.tcx.is_thread_local_static(did)); @@ -495,6 +500,7 @@ impl<'rt, 'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValidityVisitor<'rt, 'mir, ' // If this allocation has size zero, there is no actual mutability here. let (size, _align, _alloc_kind) = self.ecx.get_alloc_info(alloc_id); if size != Size::ZERO { + let alloc_actual_mutbl = mutability(self.ecx, alloc_id); // Mutable pointer to immutable memory is no good. if ptr_expected_mutbl == Mutability::Mut && alloc_actual_mutbl == Mutability::Not @@ -831,6 +837,8 @@ impl<'rt, 'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValueVisitor<'mir, 'tcx, M> trace!("visit_value: {:?}, {:?}", *op, op.layout); // Check primitive types -- the leaves of our recursive descent. + // We assume that the Scalar validity range does not restrict these values + // any further than `try_visit_primitive` does! if self.try_visit_primitive(op)? { return Ok(()); } diff --git a/compiler/rustc_const_eval/src/lib.rs b/compiler/rustc_const_eval/src/lib.rs index a525b838afa..7b293e2b533 100644 --- a/compiler/rustc_const_eval/src/lib.rs +++ b/compiler/rustc_const_eval/src/lib.rs @@ -1,9 +1,3 @@ -/*! - -Rust MIR: a lowered representation of Rust. - -*/ - #![allow(internal_features)] #![allow(rustc::diagnostic_outside_of_impl)] #![feature(rustdoc_internals)] diff --git a/compiler/rustc_driver_impl/messages.ftl b/compiler/rustc_driver_impl/messages.ftl index 5b39248302e..31837e01764 100644 --- a/compiler/rustc_driver_impl/messages.ftl +++ b/compiler/rustc_driver_impl/messages.ftl @@ -10,6 +10,8 @@ driver_impl_ice_path_error = the ICE couldn't be written to `{$path}`: {$error} driver_impl_ice_path_error_env = the environment variable `RUSTC_ICE` is set to `{$env_var}` driver_impl_ice_version = rustc {$version} running on {$triple} +driver_impl_rlink_corrupt_file = corrupt metadata encountered in `{$file}` + driver_impl_rlink_empty_version_number = The input does not contain version number driver_impl_rlink_encoding_version_mismatch = .rlink file was produced with encoding version `{$version_array}`, but the current version is `{$rlink_version}` diff --git a/compiler/rustc_driver_impl/src/lib.rs b/compiler/rustc_driver_impl/src/lib.rs index ba6b9ef0784..5532eff7be6 100644 --- a/compiler/rustc_driver_impl/src/lib.rs +++ b/compiler/rustc_driver_impl/src/lib.rs @@ -96,7 +96,7 @@ mod signal_handler { use crate::session_diagnostics::{ RLinkEmptyVersionNumber, RLinkEncodingVersionMismatch, RLinkRustcVersionMismatch, - RLinkWrongFileType, RlinkNotAFile, RlinkUnableToRead, + RLinkWrongFileType, RlinkCorruptFile, RlinkNotAFile, RlinkUnableToRead, }; rustc_fluent_macro::fluent_messages! { "../messages.ftl" } @@ -645,8 +645,7 @@ fn process_rlink(sess: &Session, compiler: &interface::Compiler) { match err { CodegenErrors::WrongFileType => dcx.emit_fatal(RLinkWrongFileType), CodegenErrors::EmptyVersionNumber => dcx.emit_fatal(RLinkEmptyVersionNumber), - CodegenErrors::EncodingVersionMismatch { version_array, rlink_version } => sess - .dcx() + CodegenErrors::EncodingVersionMismatch { version_array, rlink_version } => dcx .emit_fatal(RLinkEncodingVersionMismatch { version_array, rlink_version }), CodegenErrors::RustcVersionMismatch { rustc_version } => { dcx.emit_fatal(RLinkRustcVersionMismatch { @@ -654,6 +653,9 @@ fn process_rlink(sess: &Session, compiler: &interface::Compiler) { current_version: sess.cfg_version, }) } + CodegenErrors::CorruptFile => { + dcx.emit_fatal(RlinkCorruptFile { file }); + } }; } }; diff --git a/compiler/rustc_driver_impl/src/session_diagnostics.rs b/compiler/rustc_driver_impl/src/session_diagnostics.rs index 1a9683e840a..449878f28c4 100644 --- a/compiler/rustc_driver_impl/src/session_diagnostics.rs +++ b/compiler/rustc_driver_impl/src/session_diagnostics.rs @@ -33,6 +33,12 @@ pub(crate) struct RLinkRustcVersionMismatch<'a> { pub(crate) struct RlinkNotAFile; #[derive(Diagnostic)] +#[diag(driver_impl_rlink_corrupt_file)] +pub(crate) struct RlinkCorruptFile<'a> { + pub file: &'a std::path::Path, +} + +#[derive(Diagnostic)] #[diag(driver_impl_ice)] pub(crate) struct Ice; diff --git a/compiler/rustc_errors/src/diagnostic_impls.rs b/compiler/rustc_errors/src/diagnostic_impls.rs index 4bf7dccab92..ee6df8e15db 100644 --- a/compiler/rustc_errors/src/diagnostic_impls.rs +++ b/compiler/rustc_errors/src/diagnostic_impls.rs @@ -118,6 +118,15 @@ impl<I: rustc_type_ir::Interner> IntoDiagArg for rustc_type_ir::FnSig<I> { } } +impl<I: rustc_type_ir::Interner, T> IntoDiagArg for rustc_type_ir::Binder<I, T> +where + T: IntoDiagArg, +{ + fn into_diag_arg(self) -> DiagArgValue { + self.skip_binder().into_diag_arg() + } +} + into_diag_arg_for_number!(i8, u8, i16, u16, i32, u32, i64, u64, i128, u128, isize, usize); impl IntoDiagArg for bool { @@ -282,6 +291,12 @@ impl IntoDiagArg for ClosureKind { } } +impl IntoDiagArg for hir::def::Namespace { + fn into_diag_arg(self) -> DiagArgValue { + DiagArgValue::Str(Cow::Borrowed(self.descr())) + } +} + #[derive(Clone)] pub struct DiagSymbolList(Vec<Symbol>); diff --git a/compiler/rustc_expand/src/base.rs b/compiler/rustc_expand/src/base.rs index 12868a66605..91af8758e51 100644 --- a/compiler/rustc_expand/src/base.rs +++ b/compiler/rustc_expand/src/base.rs @@ -1364,18 +1364,15 @@ fn pretty_printing_compatibility_hack(item: &Item, sess: &Session) -> bool { }; if crate_matches { - // FIXME: make this translatable - #[allow(rustc::untranslatable_diagnostic)] - sess.psess.buffer_lint_with_diagnostic( - PROC_MACRO_BACK_COMPAT, - item.ident.span, - ast::CRATE_NODE_ID, - "using an old version of `rental`", - BuiltinLintDiag::ProcMacroBackCompat( - "older versions of the `rental` crate will stop compiling in future versions of Rust; \ - please update to `rental` v0.5.6, or switch to one of the `rental` alternatives".to_string() - ) - ); + sess.psess.buffer_lint( + PROC_MACRO_BACK_COMPAT, + item.ident.span, + ast::CRATE_NODE_ID, + BuiltinLintDiag::ProcMacroBackCompat { + crate_name: "rental".to_string(), + fixed_version: "0.5.6".to_string(), + }, + ); return true; } } diff --git a/compiler/rustc_expand/src/config.rs b/compiler/rustc_expand/src/config.rs index 35f0d8abffc..badfa6d3aa3 100644 --- a/compiler/rustc_expand/src/config.rs +++ b/compiler/rustc_expand/src/config.rs @@ -14,6 +14,7 @@ use rustc_attr as attr; use rustc_data_structures::flat_map_in_place::FlatMapInPlace; use rustc_feature::Features; use rustc_feature::{ACCEPTED_FEATURES, REMOVED_FEATURES, UNSTABLE_FEATURES}; +use rustc_lint_defs::BuiltinLintDiag; use rustc_parse::validate_attr; use rustc_session::parse::feature_err; use rustc_session::Session; @@ -248,7 +249,6 @@ impl<'a> StripUnconfigured<'a> { /// Gives a compiler warning when the `cfg_attr` contains no attributes and /// is in the original source file. Gives a compiler error if the syntax of /// the attribute is incorrect. - #[allow(rustc::untranslatable_diagnostic)] // FIXME: make this translatable pub(crate) fn expand_cfg_attr(&self, attr: &Attribute, recursive: bool) -> Vec<Attribute> { let Some((cfg_predicate, expanded_attrs)) = rustc_parse::parse_cfg_attr(attr, &self.sess.psess) @@ -262,7 +262,7 @@ impl<'a> StripUnconfigured<'a> { rustc_lint_defs::builtin::UNUSED_ATTRIBUTES, attr.span, ast::CRATE_NODE_ID, - "`#[cfg_attr]` does not expand to any attributes", + BuiltinLintDiag::CfgAttrNoAttributes, ); } @@ -283,7 +283,6 @@ impl<'a> StripUnconfigured<'a> { } } - #[allow(rustc::untranslatable_diagnostic)] // FIXME: make this translatable fn expand_cfg_attr_item( &self, attr: &Attribute, @@ -346,7 +345,7 @@ impl<'a> StripUnconfigured<'a> { rustc_lint_defs::builtin::DEPRECATED_CFG_ATTR_CRATE_TYPE_NAME, attr.span, ast::CRATE_NODE_ID, - "`crate_type` within an `#![cfg_attr] attribute is deprecated`", + BuiltinLintDiag::CrateTypeInCfgAttr, ); } if attr.has_name(sym::crate_name) { @@ -354,7 +353,7 @@ impl<'a> StripUnconfigured<'a> { rustc_lint_defs::builtin::DEPRECATED_CFG_ATTR_CRATE_TYPE_NAME, attr.span, ast::CRATE_NODE_ID, - "`crate_name` within an `#![cfg_attr] attribute is deprecated`", + BuiltinLintDiag::CrateNameInCfgAttr, ); } attr diff --git a/compiler/rustc_expand/src/expand.rs b/compiler/rustc_expand/src/expand.rs index a049ac251e1..d8f0f221189 100644 --- a/compiler/rustc_expand/src/expand.rs +++ b/compiler/rustc_expand/src/expand.rs @@ -1799,11 +1799,10 @@ impl<'a, 'b> InvocationCollector<'a, 'b> { } if attr.is_doc_comment() { - self.cx.sess.psess.buffer_lint_with_diagnostic( + self.cx.sess.psess.buffer_lint( UNUSED_DOC_COMMENTS, current_span, self.cx.current_expansion.lint_node_id, - "unused doc comment", BuiltinLintDiag::UnusedDocComment(attr.span), ); } else if rustc_attr::is_builtin_attr(attr) { @@ -1811,11 +1810,10 @@ impl<'a, 'b> InvocationCollector<'a, 'b> { // `#[cfg]` and `#[cfg_attr]` are special - they are // eagerly evaluated. if attr_name != sym::cfg && attr_name != sym::cfg_attr { - self.cx.sess.psess.buffer_lint_with_diagnostic( + self.cx.sess.psess.buffer_lint( UNUSED_ATTRIBUTES, attr.span, self.cx.current_expansion.lint_node_id, - format!("unused attribute `{attr_name}`"), BuiltinLintDiag::UnusedBuiltinAttribute { attr_name, macro_name: pprust::path_to_string(&call.path), diff --git a/compiler/rustc_expand/src/mbe/macro_check.rs b/compiler/rustc_expand/src/mbe/macro_check.rs index dce8e0c36ed..72dbbde54b3 100644 --- a/compiler/rustc_expand/src/mbe/macro_check.rs +++ b/compiler/rustc_expand/src/mbe/macro_check.rs @@ -110,7 +110,8 @@ use crate::mbe::{KleeneToken, TokenTree}; use rustc_ast::token::{Delimiter, IdentIsRaw, Token, TokenKind}; use rustc_ast::{NodeId, DUMMY_NODE_ID}; use rustc_data_structures::fx::FxHashMap; -use rustc_errors::{DiagMessage, MultiSpan}; +use rustc_errors::MultiSpan; +use rustc_lint_defs::BuiltinLintDiag; use rustc_session::lint::builtin::{META_VARIABLE_MISUSE, MISSING_FRAGMENT_SPECIFIER}; use rustc_session::parse::ParseSess; use rustc_span::symbol::kw; @@ -252,7 +253,7 @@ fn check_binders( // 1. The meta-variable is already bound in the current LHS: This is an error. let mut span = MultiSpan::from_span(span); span.push_span_label(prev_info.span, "previous declaration"); - buffer_lint(psess, span, node_id, "duplicate matcher binding"); + buffer_lint(psess, span, node_id, BuiltinLintDiag::DuplicateMatcherBinding); } else if get_binder_info(macros, binders, name).is_none() { // 2. The meta-variable is free: This is a binder. binders.insert(name, BinderInfo { span, ops: ops.into() }); @@ -271,7 +272,7 @@ fn check_binders( MISSING_FRAGMENT_SPECIFIER, span, node_id, - "missing fragment specifier", + BuiltinLintDiag::MissingFragmentSpecifier, ); } if !macros.is_empty() { @@ -595,7 +596,7 @@ fn check_ops_is_prefix( return; } } - buffer_lint(psess, span.into(), node_id, format!("unknown macro variable `{name}`")); + buffer_lint(psess, span.into(), node_id, BuiltinLintDiag::UnknownMacroVariable(name)); } /// Returns whether `binder_ops` is a prefix of `occurrence_ops`. @@ -628,8 +629,7 @@ fn ops_is_prefix( if i >= occurrence_ops.len() { let mut span = MultiSpan::from_span(span); span.push_span_label(binder.span, "expected repetition"); - let message = format!("variable '{name}' is still repeating at this depth"); - buffer_lint(psess, span, node_id, message); + buffer_lint(psess, span, node_id, BuiltinLintDiag::MetaVariableStillRepeating(name)); return; } let occurrence = &occurrence_ops[i]; @@ -637,21 +637,15 @@ fn ops_is_prefix( let mut span = MultiSpan::from_span(span); span.push_span_label(binder.span, "expected repetition"); span.push_span_label(occurrence.span, "conflicting repetition"); - let message = "meta-variable repeats with different Kleene operator"; - buffer_lint(psess, span, node_id, message); + buffer_lint(psess, span, node_id, BuiltinLintDiag::MetaVariableWrongOperator); return; } } } -fn buffer_lint( - psess: &ParseSess, - span: MultiSpan, - node_id: NodeId, - message: impl Into<DiagMessage>, -) { +fn buffer_lint(psess: &ParseSess, span: MultiSpan, node_id: NodeId, diag: BuiltinLintDiag) { // Macros loaded from other crates have dummy node ids. if node_id != DUMMY_NODE_ID { - psess.buffer_lint(META_VARIABLE_MISUSE, span, node_id, message); + psess.buffer_lint(META_VARIABLE_MISUSE, span, node_id, diag); } } diff --git a/compiler/rustc_expand/src/mbe/macro_rules.rs b/compiler/rustc_expand/src/mbe/macro_rules.rs index 8f18055f838..d99ecb61085 100644 --- a/compiler/rustc_expand/src/mbe/macro_rules.rs +++ b/compiler/rustc_expand/src/mbe/macro_rules.rs @@ -79,11 +79,10 @@ impl<'a> ParserAnyMacro<'a> { // but `m!()` is allowed in expression positions (cf. issue #34706). if kind == AstFragmentKind::Expr && parser.token == token::Semi { if is_local { - parser.psess.buffer_lint_with_diagnostic( + parser.psess.buffer_lint( SEMICOLON_IN_EXPRESSIONS_FROM_MACROS, parser.token.span, lint_node_id, - "trailing semicolon in macro used in expression position", BuiltinLintDiag::TrailingMacro(is_trailing_mac, macro_ident), ); } @@ -1154,11 +1153,10 @@ fn check_matcher_core<'tt>( name, Some(NonterminalKind::PatParam { inferred: false }), )); - sess.psess.buffer_lint_with_diagnostic( + sess.psess.buffer_lint( RUST_2021_INCOMPATIBLE_OR_PATTERNS, span, ast::CRATE_NODE_ID, - "the meaning of the `pat` fragment specifier is changing in Rust 2021, which may affect this macro", BuiltinLintDiag::OrPatternsBackCompat(span, suggestion), ); } diff --git a/compiler/rustc_feature/src/builtin_attrs.rs b/compiler/rustc_feature/src/builtin_attrs.rs index dbb88e42a3e..0b4a871dd50 100644 --- a/compiler/rustc_feature/src/builtin_attrs.rs +++ b/compiler/rustc_feature/src/builtin_attrs.rs @@ -515,12 +515,6 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ EncodeCrossCrate::Yes, experimental!(deprecated_safe), ), - // RFC 2397 - gated!( - do_not_recommend, Normal, template!(Word), WarnFollowing, - EncodeCrossCrate::Yes, experimental!(do_not_recommend) - ), - // `#[cfi_encoding = ""]` gated!( cfi_encoding, Normal, template!(NameValueStr: "encoding"), ErrorPreceding, @@ -899,10 +893,11 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ "the `#[rustc_main]` attribute is used internally to specify test entry point function", ), rustc_attr!( - rustc_skip_array_during_method_dispatch, Normal, template!(Word), - WarnFollowing, EncodeCrossCrate::No, - "the `#[rustc_skip_array_during_method_dispatch]` attribute is used to exclude a trait \ - from method dispatch when the receiver is an array, for compatibility in editions < 2021." + rustc_skip_during_method_dispatch, Normal, template!(List: "array, boxed_slice"), WarnFollowing, + EncodeCrossCrate::No, + "the `#[rustc_skip_during_method_dispatch]` attribute is used to exclude a trait \ + from method dispatch when the receiver is of the following type, for compatibility in \ + editions < 2021 (array) or editions < 2024 (boxed_slice)." ), rustc_attr!( rustc_must_implement_one_of, Normal, template!(List: "function1, function2, ..."), diff --git a/compiler/rustc_hir_analysis/messages.ftl b/compiler/rustc_hir_analysis/messages.ftl index 3edea0191fa..cf492a2a3fe 100644 --- a/compiler/rustc_hir_analysis/messages.ftl +++ b/compiler/rustc_hir_analysis/messages.ftl @@ -371,9 +371,9 @@ hir_analysis_pass_to_variadic_function = can't pass `{$ty}` to variadic function .suggestion = cast the value to `{$cast_ty}` .help = cast the value to `{$cast_ty}` -hir_analysis_pattern_type_non_const_range = "range patterns must have constant range start and end" -hir_analysis_pattern_type_wild_pat = "wildcard patterns are not permitted for pattern types" - .label = "this type is the same as the inner type without a pattern" +hir_analysis_pattern_type_non_const_range = range patterns must have constant range start and end +hir_analysis_pattern_type_wild_pat = wildcard patterns are not permitted for pattern types + .label = this type is the same as the inner type without a pattern hir_analysis_placeholder_not_allowed_item_signatures = the placeholder `_` is not allowed within types on item signatures for {$kind} .label = not allowed in type signatures diff --git a/compiler/rustc_hir_analysis/src/check/intrinsic.rs b/compiler/rustc_hir_analysis/src/check/intrinsic.rs index d829e720d9e..50fe20346cf 100644 --- a/compiler/rustc_hir_analysis/src/check/intrinsic.rs +++ b/compiler/rustc_hir_analysis/src/check/intrinsic.rs @@ -607,6 +607,7 @@ pub fn check_intrinsic_type( | sym::simd_bitreverse | sym::simd_ctlz | sym::simd_cttz + | sym::simd_ctpop | sym::simd_fsqrt | sym::simd_fsin | sym::simd_fcos diff --git a/compiler/rustc_hir_analysis/src/collect.rs b/compiler/rustc_hir_analysis/src/collect.rs index aa28b2c8e2c..b760b86a7bf 100644 --- a/compiler/rustc_hir_analysis/src/collect.rs +++ b/compiler/rustc_hir_analysis/src/collect.rs @@ -1117,8 +1117,24 @@ fn trait_def(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::TraitDef { let is_marker = tcx.has_attr(def_id, sym::marker); let rustc_coinductive = tcx.has_attr(def_id, sym::rustc_coinductive); - let skip_array_during_method_dispatch = - tcx.has_attr(def_id, sym::rustc_skip_array_during_method_dispatch); + + // FIXME: We could probably do way better attribute validation here. + let mut skip_array_during_method_dispatch = false; + let mut skip_boxed_slice_during_method_dispatch = false; + for attr in tcx.get_attrs(def_id, sym::rustc_skip_during_method_dispatch) { + if let Some(lst) = attr.meta_item_list() { + for item in lst { + if let Some(ident) = item.ident() { + match ident.as_str() { + "array" => skip_array_during_method_dispatch = true, + "boxed_slice" => skip_boxed_slice_during_method_dispatch = true, + _ => (), + } + } + } + } + } + let specialization_kind = if tcx.has_attr(def_id, sym::rustc_unsafe_specialization_marker) { ty::trait_def::TraitSpecializationKind::Marker } else if tcx.has_attr(def_id, sym::rustc_specialization_trait) { @@ -1253,6 +1269,7 @@ fn trait_def(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::TraitDef { is_marker, is_coinductive: rustc_coinductive || is_auto, skip_array_during_method_dispatch, + skip_boxed_slice_during_method_dispatch, specialization_kind, must_implement_one_of, implement_via_object, diff --git a/compiler/rustc_hir_analysis/src/hir_ty_lowering/errors.rs b/compiler/rustc_hir_analysis/src/hir_ty_lowering/errors.rs index 00356ece585..9c687d3282b 100644 --- a/compiler/rustc_hir_analysis/src/hir_ty_lowering/errors.rs +++ b/compiler/rustc_hir_analysis/src/hir_ty_lowering/errors.rs @@ -18,7 +18,7 @@ use rustc_hir::def_id::{DefId, LocalDefId}; use rustc_infer::traits::FulfillmentError; use rustc_middle::bug; use rustc_middle::query::Key; -use rustc_middle::ty::print::PrintTraitRefExt as _; +use rustc_middle::ty::print::{PrintPolyTraitRefExt as _, PrintTraitRefExt as _}; use rustc_middle::ty::GenericParamDefKind; use rustc_middle::ty::{self, suggest_constraining_type_param}; use rustc_middle::ty::{AdtDef, Ty, TyCtxt, TypeVisitableExt}; @@ -1382,7 +1382,7 @@ pub enum GenericsArgsErrExtend<'tcx> { span: Span, }, SelfTyParam(Span), - TyParam(DefId), + Param(DefId), DefVariant, None, } @@ -1498,11 +1498,11 @@ fn generics_args_err_extend<'a>( GenericsArgsErrExtend::DefVariant => { err.note("enum variants can't have type parameters"); } - GenericsArgsErrExtend::TyParam(def_id) => { - if let Some(span) = tcx.def_ident_span(def_id) { - let name = tcx.item_name(def_id); - err.span_note(span, format!("type parameter `{name}` defined here")); - } + GenericsArgsErrExtend::Param(def_id) => { + let span = tcx.def_ident_span(def_id).unwrap(); + let kind = tcx.def_descr(def_id); + let name = tcx.item_name(def_id); + err.span_note(span, format!("{kind} `{name}` defined here")); } GenericsArgsErrExtend::SelfTyParam(span) => { err.span_suggestion_verbose( diff --git a/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs b/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs index 8caeb85204b..4b1c0da6ce1 100644 --- a/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs +++ b/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs @@ -40,6 +40,7 @@ use rustc_infer::infer::{InferCtxt, TyCtxtInferExt}; use rustc_infer::traits::ObligationCause; use rustc_middle::middle::stability::AllowUnstable; use rustc_middle::mir::interpret::{LitToConstError, LitToConstInput}; +use rustc_middle::ty::print::PrintPolyTraitRefExt as _; use rustc_middle::ty::{ self, Const, GenericArgKind, GenericArgsRef, GenericParamDefKind, ParamEnv, Ty, TyCtxt, TypeVisitableExt, @@ -1757,7 +1758,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ { assert_eq!(opt_self_ty, None); let _ = self.prohibit_generic_args( path.segments.iter(), - GenericsArgsErrExtend::TyParam(def_id), + GenericsArgsErrExtend::Param(def_id), ); self.lower_ty_param(hir_id) } @@ -2190,10 +2191,15 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ { hir::ExprKind::Path(hir::QPath::Resolved( _, - &hir::Path { - res: Res::Def(DefKind::ConstParam, def_id), .. + path @ &hir::Path { + res: Res::Def(DefKind::ConstParam, def_id), + .. }, )) => { + let _ = self.prohibit_generic_args( + path.segments.iter(), + GenericsArgsErrExtend::Param(def_id), + ); let ty = tcx .type_of(def_id) .no_bound_vars() diff --git a/compiler/rustc_hir_analysis/src/outlives/utils.rs b/compiler/rustc_hir_analysis/src/outlives/utils.rs index 95290bbecf2..5086c2af3f6 100644 --- a/compiler/rustc_hir_analysis/src/outlives/utils.rs +++ b/compiler/rustc_hir_analysis/src/outlives/utils.rs @@ -9,7 +9,7 @@ use smallvec::smallvec; /// Tracks the `T: 'a` or `'a: 'a` predicates that we have inferred /// must be added to the struct header. pub(crate) type RequiredPredicates<'tcx> = - FxIndexMap<ty::OutlivesPredicate<GenericArg<'tcx>, ty::Region<'tcx>>, Span>; + FxIndexMap<ty::OutlivesPredicate<'tcx, ty::GenericArg<'tcx>>, Span>; /// Given a requirement `T: 'a` or `'b: 'a`, deduce the /// outlives_component and add it to `required_predicates` diff --git a/compiler/rustc_hir_typeck/src/coercion.rs b/compiler/rustc_hir_typeck/src/coercion.rs index d81dab2222a..33c24433ca3 100644 --- a/compiler/rustc_hir_typeck/src/coercion.rs +++ b/compiler/rustc_hir_typeck/src/coercion.rs @@ -1591,31 +1591,28 @@ impl<'tcx, 'exprs, E: AsCoercionSite> CoerceMany<'tcx, 'exprs, E> { err.span_label(cause.span, "return type is not `()`"); } ObligationCauseCode::BlockTailExpression(blk_id, ..) => { - let parent_id = fcx.tcx.parent_hir_id(blk_id); err = self.report_return_mismatched_types( cause, expected, found, coercion_error, fcx, - parent_id, + blk_id, expression, - Some(blk_id), ); if !fcx.tcx.features().unsized_locals { unsized_return = self.is_return_ty_definitely_unsized(fcx); } } - ObligationCauseCode::ReturnValue(id) => { + ObligationCauseCode::ReturnValue(return_expr_id) => { err = self.report_return_mismatched_types( cause, expected, found, coercion_error, fcx, - id, + return_expr_id, expression, - None, ); if !fcx.tcx.features().unsized_locals { unsized_return = self.is_return_ty_definitely_unsized(fcx); @@ -1809,13 +1806,14 @@ impl<'tcx, 'exprs, E: AsCoercionSite> CoerceMany<'tcx, 'exprs, E> { found: Ty<'tcx>, ty_err: TypeError<'tcx>, fcx: &FnCtxt<'a, 'tcx>, - id: hir::HirId, + block_or_return_id: hir::HirId, expression: Option<&'tcx hir::Expr<'tcx>>, - blk_id: Option<hir::HirId>, ) -> Diag<'a> { let mut err = fcx.err_ctxt().report_mismatched_types(cause, expected, found, ty_err); - let parent_id = fcx.tcx.parent_hir_id(id); + let due_to_block = matches!(fcx.tcx.hir_node(block_or_return_id), hir::Node::Block(..)); + + let parent_id = fcx.tcx.parent_hir_id(block_or_return_id); let parent = fcx.tcx.hir_node(parent_id); if let Some(expr) = expression && let hir::Node::Expr(hir::Expr { @@ -1829,72 +1827,64 @@ impl<'tcx, 'exprs, E: AsCoercionSite> CoerceMany<'tcx, 'exprs, E> { // Verify that this is a tail expression of a function, otherwise the // label pointing out the cause for the type coercion will be wrong // as prior return coercions would not be relevant (#57664). - let fn_decl = if let (Some(expr), Some(blk_id)) = (expression, blk_id) { + if let Some(expr) = expression + && due_to_block + { fcx.suggest_missing_semicolon(&mut err, expr, expected, false); - let pointing_at_return_type = - fcx.suggest_mismatched_types_on_tail(&mut err, expr, expected, found, blk_id); - if let (Some(cond_expr), true, false) = ( - fcx.tcx.hir().get_if_cause(expr.hir_id), - expected.is_unit(), - pointing_at_return_type, - ) + let pointing_at_return_type = fcx.suggest_mismatched_types_on_tail( + &mut err, + expr, + expected, + found, + block_or_return_id, + ); + if let Some(cond_expr) = fcx.tcx.hir().get_if_cause(expr.hir_id) + && expected.is_unit() + && !pointing_at_return_type // If the block is from an external macro or try (`?`) desugaring, then // do not suggest adding a semicolon, because there's nowhere to put it. // See issues #81943 and #87051. && matches!( cond_expr.span.desugaring_kind(), None | Some(DesugaringKind::WhileLoop) - ) && !in_external_macro(fcx.tcx.sess, cond_expr.span) - && !matches!( - cond_expr.kind, - hir::ExprKind::Match(.., hir::MatchSource::TryDesugar(_)) - ) + ) + && !in_external_macro(fcx.tcx.sess, cond_expr.span) + && !matches!( + cond_expr.kind, + hir::ExprKind::Match(.., hir::MatchSource::TryDesugar(_)) + ) { err.span_label(cond_expr.span, "expected this to be `()`"); if expr.can_have_side_effects() { fcx.suggest_semicolon_at_end(cond_expr.span, &mut err); } } - fcx.get_node_fn_decl(parent) - .map(|(fn_id, fn_decl, _, is_main)| (fn_id, fn_decl, is_main)) - } else { - fcx.get_fn_decl(parent_id) }; - if let Some((fn_id, fn_decl, can_suggest)) = fn_decl { - if blk_id.is_none() { - fcx.suggest_missing_return_type( - &mut err, - fn_decl, - expected, - found, - can_suggest, - fn_id, - ); - } - } - - let mut parent_id = fcx.tcx.hir().get_parent_item(id).def_id; - let mut parent_item = fcx.tcx.hir_node_by_def_id(parent_id); - // When suggesting return, we need to account for closures and async blocks, not just items. - for (_, node) in fcx.tcx.hir().parent_iter(id) { - match node { - hir::Node::Expr(&hir::Expr { - kind: hir::ExprKind::Closure(hir::Closure { def_id, .. }), - .. - }) => { - parent_item = node; - parent_id = *def_id; - break; - } - hir::Node::Item(_) | hir::Node::TraitItem(_) | hir::Node::ImplItem(_) => break, - _ => {} - } + // If this is due to an explicit `return`, suggest adding a return type. + if let Some((fn_id, fn_decl, can_suggest)) = fcx.get_fn_decl(parent_id) + && !due_to_block + { + fcx.suggest_missing_return_type(&mut err, fn_decl, expected, found, can_suggest, fn_id); } - if let (Some(expr), Some(_), Some(fn_decl)) = (expression, blk_id, parent_item.fn_decl()) { + // If this is due to a block, then maybe we forgot a `return`/`break`. + if due_to_block + && let Some(expr) = expression + && let Some((parent_fn_decl, parent_id)) = fcx + .tcx + .hir() + .parent_iter(block_or_return_id) + .find_map(|(_, node)| Some((node.fn_decl()?, node.associated_body()?.0))) + { fcx.suggest_missing_break_or_return_expr( - &mut err, expr, fn_decl, expected, found, id, parent_id, + &mut err, + expr, + parent_fn_decl, + expected, + found, + block_or_return_id, + parent_id, ); } diff --git a/compiler/rustc_hir_typeck/src/demand.rs b/compiler/rustc_hir_typeck/src/demand.rs index 6da5adc7a6e..7916366ef08 100644 --- a/compiler/rustc_hir_typeck/src/demand.rs +++ b/compiler/rustc_hir_typeck/src/demand.rs @@ -373,8 +373,11 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { let Some(arg_ty) = self.node_ty_opt(args[idx].hir_id) else { return false; }; - let possible_rcvr_ty = expr_finder.uses.iter().find_map(|binding| { + let possible_rcvr_ty = expr_finder.uses.iter().rev().find_map(|binding| { let possible_rcvr_ty = self.node_ty_opt(binding.hir_id)?; + if possible_rcvr_ty.is_ty_var() { + return None; + } // Fudge the receiver, so we can do new inference on it. let possible_rcvr_ty = possible_rcvr_ty.fold_with(&mut fudger); let method = self @@ -386,6 +389,12 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { binding, ) .ok()?; + // Make sure we select the same method that we started with... + if Some(method.def_id) + != self.typeck_results.borrow().type_dependent_def_id(call_expr.hir_id) + { + return None; + } // Unify the method signature with our incompatible arg, to // do inference in the *opposite* direction and to find out // what our ideal rcvr ty would look like. @@ -456,6 +465,12 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { ) else { continue; }; + // Make sure we select the same method that we started with... + if Some(method.def_id) + != self.typeck_results.borrow().type_dependent_def_id(parent_expr.hir_id) + { + continue; + } let ideal_rcvr_ty = rcvr_ty.fold_with(&mut fudger); let ideal_method = self @@ -505,13 +520,19 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { // blame arg, if possible. Don't do this if we're coming from // arg mismatch code, because we'll possibly suggest a mutually // incompatible fix at the original mismatch site. + // HACK(compiler-errors): We don't actually consider the implications + // of our inference guesses in `emit_type_mismatch_suggestions`, so + // only suggest things when we know our type error is precisely due to + // a type mismatch, and not via some projection or something. See #116155. if matches!(source, TypeMismatchSource::Ty(_)) && let Some(ideal_method) = ideal_method - && let ideal_arg_ty = self.resolve_vars_if_possible(ideal_method.sig.inputs()[idx + 1]) - // HACK(compiler-errors): We don't actually consider the implications - // of our inference guesses in `emit_type_mismatch_suggestions`, so - // only suggest things when we know our type error is precisely due to - // a type mismatch, and not via some projection or something. See #116155. + && Some(ideal_method.def_id) + == self + .typeck_results + .borrow() + .type_dependent_def_id(parent_expr.hir_id) + && let ideal_arg_ty = + self.resolve_vars_if_possible(ideal_method.sig.inputs()[idx + 1]) && !ideal_arg_ty.has_non_region_infer() { self.emit_type_mismatch_suggestions( diff --git a/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs b/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs index 758df83d3eb..77f90c0c131 100644 --- a/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs +++ b/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs @@ -33,7 +33,7 @@ use rustc_middle::{bug, span_bug}; use rustc_session::lint; use rustc_span::def_id::LocalDefId; use rustc_span::hygiene::DesugaringKind; -use rustc_span::symbol::{kw, sym, Ident}; +use rustc_span::symbol::{kw, sym}; use rustc_span::Span; use rustc_target::abi::FieldIdx; use rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt as _; @@ -867,76 +867,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { ) } - /// Given a function `Node`, return its `HirId` and `FnDecl` if it exists. Given a closure - /// that is the child of a function, return that function's `HirId` and `FnDecl` instead. - /// This may seem confusing at first, but this is used in diagnostics for `async fn`, - /// for example, where most of the type checking actually happens within a nested closure, - /// but we often want access to the parent function's signature. - /// - /// Otherwise, return false. - pub(crate) fn get_node_fn_decl( - &self, - node: Node<'tcx>, - ) -> Option<(LocalDefId, &'tcx hir::FnDecl<'tcx>, Ident, bool)> { - match node { - Node::Item(&hir::Item { - ident, - kind: hir::ItemKind::Fn(ref sig, ..), - owner_id, - .. - }) => { - // This is less than ideal, it will not suggest a return type span on any - // method called `main`, regardless of whether it is actually the entry point, - // but it will still present it as the reason for the expected type. - Some((owner_id.def_id, &sig.decl, ident, ident.name != sym::main)) - } - Node::TraitItem(&hir::TraitItem { - ident, - kind: hir::TraitItemKind::Fn(ref sig, ..), - owner_id, - .. - }) => Some((owner_id.def_id, &sig.decl, ident, true)), - Node::ImplItem(&hir::ImplItem { - ident, - kind: hir::ImplItemKind::Fn(ref sig, ..), - owner_id, - .. - }) => Some((owner_id.def_id, &sig.decl, ident, false)), - Node::Expr(&hir::Expr { - hir_id, - kind: - hir::ExprKind::Closure(hir::Closure { - kind: hir::ClosureKind::Coroutine(..), .. - }), - .. - }) => { - let (ident, sig, owner_id) = match self.tcx.parent_hir_node(hir_id) { - Node::Item(&hir::Item { - ident, - kind: hir::ItemKind::Fn(ref sig, ..), - owner_id, - .. - }) => (ident, sig, owner_id), - Node::TraitItem(&hir::TraitItem { - ident, - kind: hir::TraitItemKind::Fn(ref sig, ..), - owner_id, - .. - }) => (ident, sig, owner_id), - Node::ImplItem(&hir::ImplItem { - ident, - kind: hir::ImplItemKind::Fn(ref sig, ..), - owner_id, - .. - }) => (ident, sig, owner_id), - _ => return None, - }; - Some((owner_id.def_id, &sig.decl, ident, ident.name != sym::main)) - } - _ => None, - } - } - /// Given a `HirId`, return the `HirId` of the enclosing function, its `FnDecl`, and whether a /// suggestion can be made, `None` otherwise. pub fn get_fn_decl( @@ -945,10 +875,73 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { ) -> Option<(LocalDefId, &'tcx hir::FnDecl<'tcx>, bool)> { // Get enclosing Fn, if it is a function or a trait method, unless there's a `loop` or // `while` before reaching it, as block tail returns are not available in them. - self.tcx.hir().get_return_block(blk_id).and_then(|blk_id| { - let parent = self.tcx.hir_node(blk_id); - self.get_node_fn_decl(parent) - .map(|(fn_id, fn_decl, _, is_main)| (fn_id, fn_decl, is_main)) + self.tcx.hir().get_fn_id_for_return_block(blk_id).and_then(|item_id| { + match self.tcx.hir_node(item_id) { + Node::Item(&hir::Item { + ident, + kind: hir::ItemKind::Fn(ref sig, ..), + owner_id, + .. + }) => { + // This is less than ideal, it will not suggest a return type span on any + // method called `main`, regardless of whether it is actually the entry point, + // but it will still present it as the reason for the expected type. + Some((owner_id.def_id, sig.decl, ident.name != sym::main)) + } + Node::TraitItem(&hir::TraitItem { + kind: hir::TraitItemKind::Fn(ref sig, ..), + owner_id, + .. + }) => Some((owner_id.def_id, sig.decl, true)), + // FIXME: Suggestable if this is not a trait implementation + Node::ImplItem(&hir::ImplItem { + kind: hir::ImplItemKind::Fn(ref sig, ..), + owner_id, + .. + }) => Some((owner_id.def_id, sig.decl, false)), + Node::Expr(&hir::Expr { + hir_id, + kind: hir::ExprKind::Closure(&hir::Closure { def_id, kind, fn_decl, .. }), + .. + }) => { + match kind { + hir::ClosureKind::CoroutineClosure(_) => { + // FIXME(async_closures): Implement this. + return None; + } + hir::ClosureKind::Closure => Some((def_id, fn_decl, true)), + hir::ClosureKind::Coroutine(hir::CoroutineKind::Desugared( + _, + hir::CoroutineSource::Fn, + )) => { + let (ident, sig, owner_id) = match self.tcx.parent_hir_node(hir_id) { + Node::Item(&hir::Item { + ident, + kind: hir::ItemKind::Fn(ref sig, ..), + owner_id, + .. + }) => (ident, sig, owner_id), + Node::TraitItem(&hir::TraitItem { + ident, + kind: hir::TraitItemKind::Fn(ref sig, ..), + owner_id, + .. + }) => (ident, sig, owner_id), + Node::ImplItem(&hir::ImplItem { + ident, + kind: hir::ImplItemKind::Fn(ref sig, ..), + owner_id, + .. + }) => (ident, sig, owner_id), + _ => return None, + }; + Some((owner_id.def_id, sig.decl, ident.name != sym::main)) + } + _ => None, + } + } + _ => None, + } }) } diff --git a/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs b/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs index aea34407a2d..b8333d47493 100644 --- a/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs +++ b/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs @@ -1774,7 +1774,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { // that highlight errors inline. let mut sp = blk.span; let mut fn_span = None; - if let Some((decl, ident)) = self.get_parent_fn_decl(blk.hir_id) { + if let Some((fn_def_id, decl, _)) = self.get_fn_decl(blk.hir_id) { let ret_sp = decl.output.span(); if let Some(block_sp) = self.parent_item_span(blk.hir_id) { // HACK: on some cases (`ui/liveness/liveness-issue-2163.rs`) the @@ -1782,7 +1782,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { // the span we're aiming at correspond to a `fn` body. if block_sp == blk.span { sp = ret_sp; - fn_span = Some(ident.span); + fn_span = self.tcx.def_ident_span(fn_def_id); } } } @@ -1897,15 +1897,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { None } - /// Given a function block's `HirId`, returns its `FnDecl` if it exists, or `None` otherwise. - pub(crate) fn get_parent_fn_decl( - &self, - blk_id: HirId, - ) -> Option<(&'tcx hir::FnDecl<'tcx>, Ident)> { - let parent = self.tcx.hir_node_by_def_id(self.tcx.hir().get_parent_item(blk_id).def_id); - self.get_node_fn_decl(parent).map(|(_, fn_decl, ident, _)| (fn_decl, ident)) - } - /// If `expr` is a `match` expression that has only one non-`!` arm, use that arm's tail /// expression's `Span`, otherwise return `expr.span`. This is done to give better errors /// when given code like the following: diff --git a/compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs b/compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs index 56e13cd679d..cfd4dd4d1dd 100644 --- a/compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs +++ b/compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs @@ -800,6 +800,13 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { can_suggest: bool, fn_id: LocalDefId, ) -> bool { + // Can't suggest `->` on a block-like coroutine + if let Some(hir::CoroutineKind::Desugared(_, hir::CoroutineSource::Block)) = + self.tcx.coroutine_kind(fn_id) + { + return false; + } + let found = self.resolve_numeric_literals_with_default(self.resolve_vars_if_possible(found)); // Only suggest changing the return type for methods that @@ -1909,7 +1916,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { let returned = matches!( self.tcx.parent_hir_node(expr.hir_id), hir::Node::Expr(hir::Expr { kind: hir::ExprKind::Ret(_), .. }) - ) || map.get_return_block(expr.hir_id).is_some(); + ) || map.get_fn_id_for_return_block(expr.hir_id).is_some(); if returned && let ty::Adt(e, args_e) = expected.kind() && let ty::Adt(f, args_f) = found.kind() diff --git a/compiler/rustc_hir_typeck/src/method/mod.rs b/compiler/rustc_hir_typeck/src/method/mod.rs index a40fa600c19..4165ccb1b80 100644 --- a/compiler/rustc_hir_typeck/src/method/mod.rs +++ b/compiler/rustc_hir_typeck/src/method/mod.rs @@ -3,7 +3,7 @@ //! [rustc dev guide]: https://rustc-dev-guide.rust-lang.org/method-lookup.html mod confirm; -mod prelude2021; +mod prelude_edition_lints; pub mod probe; mod suggest; @@ -186,7 +186,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { let pick = self.lookup_probe(segment.ident, self_ty, call_expr, ProbeScope::TraitsInScope)?; - self.lint_dot_call_from_2018(self_ty, segment, span, call_expr, self_expr, &pick, args); + self.lint_edition_dependent_dot_call( + self_ty, segment, span, call_expr, self_expr, &pick, args, + ); for &import_id in &pick.import_ids { debug!("used_trait_import: {:?}", import_id); diff --git a/compiler/rustc_hir_typeck/src/method/prelude2021.rs b/compiler/rustc_hir_typeck/src/method/prelude_edition_lints.rs index eca326892b5..e9eab6969b3 100644 --- a/compiler/rustc_hir_typeck/src/method/prelude2021.rs +++ b/compiler/rustc_hir_typeck/src/method/prelude_edition_lints.rs @@ -1,12 +1,12 @@ -use crate::{ - method::probe::{self, Pick}, - FnCtxt, -}; +use crate::method::probe::{self, Pick}; +use crate::FnCtxt; + use hir::def_id::DefId; use hir::HirId; use hir::ItemKind; use rustc_errors::Applicability; use rustc_hir as hir; +use rustc_lint::{ARRAY_INTO_ITER, BOXED_SLICE_INTO_ITER}; use rustc_middle::span_bug; use rustc_middle::ty::{self, Ty}; use rustc_session::lint::builtin::RUST_2021_PRELUDE_COLLISIONS; @@ -17,7 +17,7 @@ use rustc_trait_selection::infer::InferCtxtExt; use std::fmt::Write; impl<'a, 'tcx> FnCtxt<'a, 'tcx> { - pub(super) fn lint_dot_call_from_2018( + pub(super) fn lint_edition_dependent_dot_call( &self, self_ty: Ty<'tcx>, segment: &hir::PathSegment<'_>, @@ -32,22 +32,32 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { segment.ident, self_ty, call_expr, self_expr ); - // Rust 2021 and later is already using the new prelude - if span.at_least_rust_2021() { - return; - } - - let prelude_or_array_lint = match segment.ident.name { + let (prelude_or_array_lint, edition) = match segment.ident.name { // `try_into` was added to the prelude in Rust 2021. - sym::try_into => RUST_2021_PRELUDE_COLLISIONS, + sym::try_into if !span.at_least_rust_2021() => (RUST_2021_PRELUDE_COLLISIONS, "2021"), // `into_iter` wasn't added to the prelude, // but `[T; N].into_iter()` doesn't resolve to IntoIterator::into_iter // before Rust 2021, which results in the same problem. // It is only a problem for arrays. - sym::into_iter if let ty::Array(..) = self_ty.kind() => { - // In this case, it wasn't really a prelude addition that was the problem. - // Instead, the problem is that the array-into_iter hack will no longer apply in Rust 2021. - rustc_lint::ARRAY_INTO_ITER + sym::into_iter => { + if let ty::Array(..) = self_ty.kind() + && !span.at_least_rust_2021() + { + // In this case, it wasn't really a prelude addition that was the problem. + // Instead, the problem is that the array-into_iter hack will no longer + // apply in Rust 2021. + (ARRAY_INTO_ITER, "2021") + } else if self_ty.is_box() + && self_ty.boxed_ty().is_slice() + && !span.at_least_rust_2024() + { + // In this case, it wasn't really a prelude addition that was the problem. + // Instead, the problem is that the boxed-slice-into_iter hack will no + // longer apply in Rust 2024. + (BOXED_SLICE_INTO_ITER, "2024") + } else { + return; + } } _ => return, }; @@ -81,7 +91,10 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { prelude_or_array_lint, self_expr.hir_id, self_expr.span, - format!("trait method `{}` will become ambiguous in Rust 2021", segment.ident.name), + format!( + "trait method `{}` will become ambiguous in Rust {edition}", + segment.ident.name + ), |lint| { let sp = self_expr.span; @@ -131,7 +144,10 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { prelude_or_array_lint, call_expr.hir_id, call_expr.span, - format!("trait method `{}` will become ambiguous in Rust 2021", segment.ident.name), + format!( + "trait method `{}` will become ambiguous in Rust {edition}", + segment.ident.name + ), |lint| { let sp = call_expr.span; let trait_name = self.trait_path_or_bare_name( diff --git a/compiler/rustc_hir_typeck/src/method/probe.rs b/compiler/rustc_hir_typeck/src/method/probe.rs index 60a63d72d40..e0a60337c3b 100644 --- a/compiler/rustc_hir_typeck/src/method/probe.rs +++ b/compiler/rustc_hir_typeck/src/method/probe.rs @@ -1444,6 +1444,18 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> { return ProbeResult::NoMatch; } } + + // Some trait methods are excluded for boxed slices before 2024. + // (`boxed_slice.into_iter()` wants a slice iterator for compatibility.) + if self_ty.is_box() + && self_ty.boxed_ty().is_slice() + && !method_name.span.at_least_rust_2024() + { + let trait_def = self.tcx.trait_def(poly_trait_ref.def_id()); + if trait_def.skip_boxed_slice_during_method_dispatch { + return ProbeResult::NoMatch; + } + } } let trait_ref = self.instantiate_binder_with_fresh_vars( diff --git a/compiler/rustc_hir_typeck/src/upvar.rs b/compiler/rustc_hir_typeck/src/upvar.rs index 9d16f0d4815..e29a410e2e5 100644 --- a/compiler/rustc_hir_typeck/src/upvar.rs +++ b/compiler/rustc_hir_typeck/src/upvar.rs @@ -204,6 +204,60 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { fake_reads: Default::default(), }; + let _ = euv::ExprUseVisitor::new( + &FnCtxt::new(self, self.tcx.param_env(closure_def_id), closure_def_id), + &mut delegate, + ) + .consume_body(body); + + // There are several curious situations with coroutine-closures where + // analysis is too aggressive with borrows when the coroutine-closure is + // marked `move`. Specifically: + // + // 1. If the coroutine-closure was inferred to be `FnOnce` during signature + // inference, then it's still possible that we try to borrow upvars from + // the coroutine-closure because they are not used by the coroutine body + // in a way that forces a move. See the test: + // `async-await/async-closures/force-move-due-to-inferred-kind.rs`. + // + // 2. If the coroutine-closure is forced to be `FnOnce` due to the way it + // uses its upvars, but not *all* upvars would force the closure to `FnOnce`. + // See the test: `async-await/async-closures/force-move-due-to-actually-fnonce.rs`. + // + // This would lead to an impossible to satisfy situation, since `AsyncFnOnce` + // coroutine bodies can't borrow from their parent closure. To fix this, + // we force the inner coroutine to also be `move`. This only matters for + // coroutine-closures that are `move` since otherwise they themselves will + // be borrowing from the outer environment, so there's no self-borrows occuring. + // + // One *important* note is that we do a call to `process_collected_capture_information` + // to eagerly test whether the coroutine would end up `FnOnce`, but we do this + // *before* capturing all the closure args by-value below, since that would always + // cause the analysis to return `FnOnce`. + if let UpvarArgs::Coroutine(..) = args + && let hir::CoroutineKind::Desugared(_, hir::CoroutineSource::Closure) = + self.tcx.coroutine_kind(closure_def_id).expect("coroutine should have kind") + && let parent_hir_id = + self.tcx.local_def_id_to_hir_id(self.tcx.local_parent(closure_def_id)) + && let parent_ty = self.node_ty(parent_hir_id) + && let hir::CaptureBy::Value { move_kw } = + self.tcx.hir_node(parent_hir_id).expect_closure().capture_clause + { + // (1.) Closure signature inference forced this closure to `FnOnce`. + if let Some(ty::ClosureKind::FnOnce) = self.closure_kind(parent_ty) { + capture_clause = hir::CaptureBy::Value { move_kw }; + } + // (2.) The way that the closure uses its upvars means it's `FnOnce`. + else if let (_, ty::ClosureKind::FnOnce, _) = self + .process_collected_capture_information( + capture_clause, + &delegate.capture_information, + ) + { + capture_clause = hir::CaptureBy::Value { move_kw }; + } + } + // As noted in `lower_coroutine_body_with_moved_arguments`, we default the capture mode // to `ByRef` for the `async {}` block internal to async fns/closure. This means // that we would *not* be moving all of the parameters into the async block by default. @@ -253,34 +307,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { } } - let _ = euv::ExprUseVisitor::new( - &FnCtxt::new(self, self.tcx.param_env(closure_def_id), closure_def_id), - &mut delegate, - ) - .consume_body(body); - - // If a coroutine is comes from a coroutine-closure that is `move`, but - // the coroutine-closure was inferred to be `FnOnce` during signature - // inference, then it's still possible that we try to borrow upvars from - // the coroutine-closure because they are not used by the coroutine body - // in a way that forces a move. - // - // This would lead to an impossible to satisfy situation, since `AsyncFnOnce` - // coroutine bodies can't borrow from their parent closure. To fix this, - // we force the inner coroutine to also be `move`. This only matters for - // coroutine-closures that are `move` since otherwise they themselves will - // be borrowing from the outer environment, so there's no self-borrows occuring. - if let UpvarArgs::Coroutine(..) = args - && let hir::CoroutineKind::Desugared(_, hir::CoroutineSource::Closure) = - self.tcx.coroutine_kind(closure_def_id).expect("coroutine should have kind") - && let parent_hir_id = - self.tcx.local_def_id_to_hir_id(self.tcx.local_parent(closure_def_id)) - && let parent_ty = self.node_ty(parent_hir_id) - && let Some(ty::ClosureKind::FnOnce) = self.closure_kind(parent_ty) - { - capture_clause = self.tcx.hir_node(parent_hir_id).expect_closure().capture_clause; - } - debug!( "For closure={:?}, capture_information={:#?}", closure_def_id, delegate.capture_information @@ -289,7 +315,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { self.log_capture_analysis_first_pass(closure_def_id, &delegate.capture_information, span); let (capture_information, closure_kind, origin) = self - .process_collected_capture_information(capture_clause, delegate.capture_information); + .process_collected_capture_information(capture_clause, &delegate.capture_information); self.compute_min_captures(closure_def_id, capture_information, span); @@ -545,13 +571,14 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { fn process_collected_capture_information( &self, capture_clause: hir::CaptureBy, - capture_information: InferredCaptureInformation<'tcx>, + capture_information: &InferredCaptureInformation<'tcx>, ) -> (InferredCaptureInformation<'tcx>, ty::ClosureKind, Option<(Span, Place<'tcx>)>) { let mut closure_kind = ty::ClosureKind::LATTICE_BOTTOM; let mut origin: Option<(Span, Place<'tcx>)> = None; let processed = capture_information - .into_iter() + .iter() + .cloned() .map(|(place, mut capture_info)| { // Apply rules for safety before inferring closure kind let (place, capture_kind) = diff --git a/compiler/rustc_incremental/messages.ftl b/compiler/rustc_incremental/messages.ftl index e74173b24a9..de2177ebb6e 100644 --- a/compiler/rustc_incremental/messages.ftl +++ b/compiler/rustc_incremental/messages.ftl @@ -21,6 +21,8 @@ incremental_cargo_help_2 = incremental_copy_workproduct_to_cache = error copying object file `{$from}` to incremental directory as `{$to}`: {$err} +incremental_corrupt_file = corrupt incremental compilation artifact found at `{$path}`. This file will automatically be ignored and deleted. If you see this message repeatedly or can provoke it without manually manipulating the compiler's artifacts, please file an issue. The incremental compilation system relies on hardlinks and filesystem locks behaving correctly, and may not deal well with OS crashes, so whatever information you can provide about your filesystem or other state may be very relevant. + incremental_create_dep_graph = failed to create dependency graph at `{$path}`: {$err} incremental_create_incr_comp_dir = diff --git a/compiler/rustc_incremental/src/errors.rs b/compiler/rustc_incremental/src/errors.rs index 61bb0353a9f..e94a7fb876b 100644 --- a/compiler/rustc_incremental/src/errors.rs +++ b/compiler/rustc_incremental/src/errors.rs @@ -306,3 +306,9 @@ pub struct DeleteWorkProduct<'a> { pub path: &'a Path, pub err: std::io::Error, } + +#[derive(Diagnostic)] +#[diag(incremental_corrupt_file)] +pub struct CorruptFile<'a> { + pub path: &'a Path, +} diff --git a/compiler/rustc_incremental/src/persist/load.rs b/compiler/rustc_incremental/src/persist/load.rs index 26aaa24771f..9e6ce066785 100644 --- a/compiler/rustc_incremental/src/persist/load.rs +++ b/compiler/rustc_incremental/src/persist/load.rs @@ -115,7 +115,12 @@ fn load_dep_graph(sess: &Session) -> LoadResult<(Arc<SerializedDepGraph>, WorkPr if let LoadResult::Ok { data: (work_products_data, start_pos) } = load_result { // Decode the list of work_products - let mut work_product_decoder = MemDecoder::new(&work_products_data[..], start_pos); + let Ok(mut work_product_decoder) = + MemDecoder::new(&work_products_data[..], start_pos) + else { + sess.dcx().emit_warn(errors::CorruptFile { path: &work_products_path }); + return LoadResult::DataOutOfDate; + }; let work_products: Vec<SerializedWorkProduct> = Decodable::decode(&mut work_product_decoder); @@ -145,7 +150,10 @@ fn load_dep_graph(sess: &Session) -> LoadResult<(Arc<SerializedDepGraph>, WorkPr LoadResult::DataOutOfDate => LoadResult::DataOutOfDate, LoadResult::LoadDepGraph(path, err) => LoadResult::LoadDepGraph(path, err), LoadResult::Ok { data: (bytes, start_pos) } => { - let mut decoder = MemDecoder::new(&bytes, start_pos); + let Ok(mut decoder) = MemDecoder::new(&bytes, start_pos) else { + sess.dcx().emit_warn(errors::CorruptFile { path: &path }); + return LoadResult::DataOutOfDate; + }; let prev_commandline_args_hash = u64::decode(&mut decoder); if prev_commandline_args_hash != expected_hash { @@ -181,9 +189,14 @@ pub fn load_query_result_cache(sess: &Session) -> Option<OnDiskCache<'_>> { let _prof_timer = sess.prof.generic_activity("incr_comp_load_query_result_cache"); - match load_data(&query_cache_path(sess), sess) { + let path = query_cache_path(sess); + match load_data(&path, sess) { LoadResult::Ok { data: (bytes, start_pos) } => { - Some(OnDiskCache::new(sess, bytes, start_pos)) + let cache = OnDiskCache::new(sess, bytes, start_pos).unwrap_or_else(|()| { + sess.dcx().emit_warn(errors::CorruptFile { path: &path }); + OnDiskCache::new_empty(sess.source_map()) + }); + Some(cache) } _ => Some(OnDiskCache::new_empty(sess.source_map())), } diff --git a/compiler/rustc_infer/src/infer/outlives/env.rs b/compiler/rustc_infer/src/infer/outlives/env.rs index c44a5082f68..5bcb4f29364 100644 --- a/compiler/rustc_infer/src/infer/outlives/env.rs +++ b/compiler/rustc_infer/src/infer/outlives/env.rs @@ -64,8 +64,7 @@ struct OutlivesEnvironmentBuilder<'tcx> { /// "Region-bound pairs" tracks outlives relations that are known to /// be true, either because of explicit where-clauses like `T: 'a` or /// because of implied bounds. -pub type RegionBoundPairs<'tcx> = - FxIndexSet<ty::OutlivesPredicate<GenericKind<'tcx>, Region<'tcx>>>; +pub type RegionBoundPairs<'tcx> = FxIndexSet<ty::OutlivesPredicate<'tcx, GenericKind<'tcx>>>; impl<'tcx> OutlivesEnvironment<'tcx> { /// Create a builder using `ParamEnv` and add explicit outlives bounds into it. diff --git a/compiler/rustc_infer/src/infer/outlives/verify.rs b/compiler/rustc_infer/src/infer/outlives/verify.rs index bd981c20567..7e977b9b954 100644 --- a/compiler/rustc_infer/src/infer/outlives/verify.rs +++ b/compiler/rustc_infer/src/infer/outlives/verify.rs @@ -94,7 +94,7 @@ impl<'cx, 'tcx> VerifyBoundCx<'cx, 'tcx> { pub fn approx_declared_bounds_from_env( &self, alias_ty: ty::AliasTy<'tcx>, - ) -> Vec<ty::Binder<'tcx, ty::OutlivesPredicate<Ty<'tcx>, ty::Region<'tcx>>>> { + ) -> Vec<ty::PolyTypeOutlivesPredicate<'tcx>> { let erased_alias_ty = self.tcx.erase_regions(alias_ty.to_ty(self.tcx)); self.declared_generic_bounds_from_env_for_erased_ty(erased_alias_ty) } @@ -193,7 +193,7 @@ impl<'cx, 'tcx> VerifyBoundCx<'cx, 'tcx> { fn declared_generic_bounds_from_env( &self, generic_ty: Ty<'tcx>, - ) -> Vec<ty::Binder<'tcx, ty::OutlivesPredicate<Ty<'tcx>, ty::Region<'tcx>>>> { + ) -> Vec<ty::PolyTypeOutlivesPredicate<'tcx>> { assert!(matches!(generic_ty.kind(), ty::Param(_) | ty::Placeholder(_))); self.declared_generic_bounds_from_env_for_erased_ty(generic_ty) } @@ -213,7 +213,7 @@ impl<'cx, 'tcx> VerifyBoundCx<'cx, 'tcx> { fn declared_generic_bounds_from_env_for_erased_ty( &self, erased_ty: Ty<'tcx>, - ) -> Vec<ty::Binder<'tcx, ty::OutlivesPredicate<Ty<'tcx>, ty::Region<'tcx>>>> { + ) -> Vec<ty::PolyTypeOutlivesPredicate<'tcx>> { let tcx = self.tcx; // To start, collect bounds from user environment. Note that diff --git a/compiler/rustc_interface/src/util.rs b/compiler/rustc_interface/src/util.rs index ce2382b9501..987e48a1a76 100644 --- a/compiler/rustc_interface/src/util.rs +++ b/compiler/rustc_interface/src/util.rs @@ -399,31 +399,17 @@ pub(crate) fn check_attr_crate_type( if let ast::MetaItemKind::NameValue(spanned) = a.meta_kind().unwrap() { let span = spanned.span; - let lev_candidate = find_best_match_for_name( + let candidate = find_best_match_for_name( &CRATE_TYPES.iter().map(|(k, _)| *k).collect::<Vec<_>>(), n, None, ); - if let Some(candidate) = lev_candidate { - lint_buffer.buffer_lint_with_diagnostic( - lint::builtin::UNKNOWN_CRATE_TYPES, - ast::CRATE_NODE_ID, - span, - "invalid `crate_type` value", - BuiltinLintDiag::UnknownCrateTypes( - span, - "did you mean".to_string(), - format!("\"{candidate}\""), - ), - ); - } else { - lint_buffer.buffer_lint( - lint::builtin::UNKNOWN_CRATE_TYPES, - ast::CRATE_NODE_ID, - span, - "invalid `crate_type` value", - ); - } + lint_buffer.buffer_lint( + lint::builtin::UNKNOWN_CRATE_TYPES, + ast::CRATE_NODE_ID, + span, + BuiltinLintDiag::UnknownCrateTypes { span, candidate }, + ); } } else { // This is here mainly to check for using a macro, such as diff --git a/compiler/rustc_lint/messages.ftl b/compiler/rustc_lint/messages.ftl index 5180fce2eb3..6f6480a4964 100644 --- a/compiler/rustc_lint/messages.ftl +++ b/compiler/rustc_lint/messages.ftl @@ -1,13 +1,19 @@ +lint_abs_path_with_module = absolute paths must start with `self`, `super`, `crate`, or an external crate name in the 2018 edition + .suggestion = use `crate` + +lint_ambiguous_glob_reexport = ambiguous glob re-exports + .label_first_reexport = the name `{$name}` in the {$namespace} namespace is first re-exported here + .label_duplicate_reexport = but the name `{$name}` in the {$namespace} namespace is also re-exported here + lint_ambiguous_wide_pointer_comparisons = ambiguous wide pointer comparison, the comparison includes metadata which may not be expected .addr_metadata_suggestion = use explicit `std::ptr::eq` method to compare metadata and addresses .addr_suggestion = use `std::ptr::addr_eq` or untyped pointers to only compare their addresses -lint_array_into_iter = - this method call resolves to `<&{$target} as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <{$target} as IntoIterator>::into_iter in Rust 2021 - .use_iter_suggestion = use `.iter()` instead of `.into_iter()` to avoid ambiguity - .remove_into_iter_suggestion = or remove `.into_iter()` to iterate by value - .use_explicit_into_iter_suggestion = - or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value +lint_associated_const_elided_lifetime = {$elided -> + [true] `&` without an explicit lifetime name cannot be used here + *[false] `'_` cannot be used here + } + .suggestion = use the `'static` lifetime lint_async_fn_in_trait = use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified .note = you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future` @@ -26,10 +32,19 @@ lint_atomic_ordering_load = atomic loads cannot have `Release` or `AcqRel` order lint_atomic_ordering_store = atomic stores cannot have `Acquire` or `AcqRel` ordering .help = consider using ordering modes `Release`, `SeqCst` or `Relaxed` +lint_avoid_att_syntax = + avoid using `.att_syntax`, prefer using `options(att_syntax)` instead + +lint_avoid_intel_syntax = + avoid using `.intel_syntax`, Intel syntax is the default + lint_bad_attribute_argument = bad attribute argument lint_bad_opt_access = {$msg} +lint_break_with_label_and_loop = this labeled break expression is easy to confuse with an unlabeled break with a labeled value expression + .suggestion = wrap this expression in parentheses + lint_builtin_allow_internal_unsafe = `allow_internal_unsafe` allows defining macros using unsafe without triggering the `unsafe_code` lint at their call site @@ -37,6 +52,8 @@ lint_builtin_anonymous_params = anonymous parameters are deprecated and will be .suggestion = try naming the parameter or explicitly ignoring it lint_builtin_asm_labels = avoid using named labels in inline assembly + .help = only local labels of the form `<number>:` should be used in inline asm + .note = see the asm section of Rust By Example <https://doc.rust-lang.org/nightly/rust-by-example/unsafe/asm.html#labels> for more information lint_builtin_box_pointers = type uses owned (Box type) pointers: {$ty} @@ -161,6 +178,12 @@ lint_builtin_unused_doc_comment = unused doc comment lint_builtin_while_true = denote infinite loops with `loop {"{"} ... {"}"}` .suggestion = use `loop` +lint_byte_slice_in_packed_struct_with_derive = {$ty} slice in a packed struct that derives a built-in trait + .help = consider implementing the trait by hand, or remove the `packed` attribute + +lint_cfg_attr_no_attributes = + `#[cfg_attr]` does not expand to any attributes + lint_check_name_unknown_tool = unknown lint tool: `{$tool_name}` lint_command_line_source = `forbid` lint level was set on command line @@ -169,12 +192,20 @@ lint_confusable_identifier_pair = found both `{$existing_sym}` and `{$sym}` as i .current_use = this identifier can be confused with `{$existing_sym}` .other_use = other identifier used here +lint_crate_name_in_cfg_attr_deprecated = + `crate_name` within an `#![cfg_attr]` attribute is deprecated + +lint_crate_type_in_cfg_attr_deprecated = + `crate_type` within an `#![cfg_attr]` attribute is deprecated + lint_cstring_ptr = getting the inner pointer of a temporary `CString` .as_ptr_label = this pointer will be invalid .unwrap_label = this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime .note = pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned .help = for more information, see https://doc.rust-lang.org/reference/destructors.html +lint_custom_inner_attribute_unstable = custom inner attributes are unstable + lint_default_hash_types = prefer `{$preferred}` over `{$used}`, it has better performance .note = a `use rustc_data_structures::fx::{$preferred}` may be necessary @@ -185,6 +216,11 @@ lint_deprecated_lint_name = .suggestion = change it to .help = change it to {$replace} +lint_deprecated_where_clause_location = where clause not allowed here + .note = see issue #89122 <https://github.com/rust-lang/rust/issues/89122> for more information + .suggestion_move_to_end = move it to the end of the type declaration + .suggestion_remove_where = remove this `where` + lint_diag_out_of_impl = diagnostics should only be created in `Diagnostic`/`Subdiagnostic`/`LintDiagnostic` impls @@ -202,6 +238,11 @@ lint_dropping_references = calls to `std::mem::drop` with a reference instead of .label = argument has type `{$arg_ty}` .note = use `let _ = ...` to ignore the expression or result +lint_duplicate_macro_attribute = + duplicated attribute + +lint_duplicate_matcher_binding = duplicate matcher binding + lint_enum_intrinsics_mem_discriminant = the return value of `mem::discriminant` is unspecified when called with a non-enum type .note = the argument to `discriminant` should be a reference to an enum, but it was passed a reference to a `{$ty_param}`, which is not an enum. @@ -214,6 +255,13 @@ lint_expectation = this lint expectation is unfulfilled .note = the `unfulfilled_lint_expectations` lint can't be expected and will always produce this message .rationale = {$rationale} +lint_extern_crate_not_idiomatic = `extern crate` is not idiomatic in the new edition + .suggestion = convert it to a `use` + +lint_extern_without_abi = extern declarations without an explicit ABI are deprecated + .label = ABI should be specified here + .help = the default ABI is {$default_abi} + lint_for_loops_over_fallibles = for loop over {$article} `{$ty}`. This is more readably written as an `if let` statement .suggestion = consider using `if let` to clear intent @@ -228,6 +276,12 @@ lint_forgetting_references = calls to `std::mem::forget` with a reference instea .label = argument has type `{$arg_ty}` .note = use `let _ = ...` to ignore the expression or result +lint_hidden_glob_reexport = private item shadows public glob re-export + .note_glob_reexport = the name `{$name}` in the {$namespace} namespace is supposed to be publicly re-exported here + .note_private_item = but the private item here shadows it + +lint_hidden_lifetime_parameters = hidden lifetime parameters in types are deprecated + lint_hidden_unicode_codepoints = unicode codepoint changing visible direction of text present in {$label} .label = this {$label} contains {$count -> [one] an invisible @@ -269,6 +323,11 @@ lint_identifier_uncommon_codepoints = identifier contains {$codepoints_len -> lint_ignored_unless_crate_specified = {$level}({$name}) is ignored unless specified at crate level +lint_ill_formed_attribute_input = {$num_suggestions -> + [1] attribute must be of the form {$suggestions} + *[other] valid forms for the attribute are {$suggestions} + } + lint_impl_trait_overcaptures = `{$self_ty}` will capture more lifetimes than possibly intended in edition 2024 .note = specifically, {$num_captured -> [one] this lifetime is @@ -339,6 +398,14 @@ lint_improper_ctypes_union_layout_help = consider adding a `#[repr(C)]` or `#[re lint_improper_ctypes_union_layout_reason = this union has unspecified layout lint_improper_ctypes_union_non_exhaustive = this union is non-exhaustive +lint_incomplete_include = + include macro expected single expression in source + +lint_inner_macro_attribute_unstable = inner macro attributes are unstable + +lint_invalid_crate_type_value = invalid `crate_type` value + .suggestion = did you mean + # FIXME: we should ordinalize $valid_up_to when we add support for doing so lint_invalid_from_utf8_checked = calls to `{$method}` with a invalid literal always return an error .label = the literal was valid UTF-8 up to the {$valid_up_to} bytes @@ -367,9 +434,22 @@ lint_invalid_reference_casting_note_book = for more information, visit <https:// lint_invalid_reference_casting_note_ty_has_interior_mutability = even for types with interior mutability, the only legal way to obtain a mutable pointer from a shared reference is through `UnsafeCell::get` +lint_legacy_derive_helpers = derive helper attribute is used before it is introduced + .label = the attribute is introduced here + lint_lintpass_by_hand = implementing `LintPass` by hand .help = try using `declare_lint_pass!` or `impl_lint_pass!` instead +lint_macro_expanded_macro_exports_accessed_by_absolute_paths = macro-expanded `macro_export` macros from the current crate cannot be referred to by absolute paths + .note = the macro is defined here + +lint_macro_is_private = macro `{$ident}` is private + +lint_macro_rule_never_used = rule #{$n} of macro `{$name}` is never used + +lint_macro_use_deprecated = + deprecated `#[macro_use]` attribute used to import macros should be replaced at use sites with a `use` item to import the macro instead + lint_malformed_attribute = malformed lint attribute input lint_map_unit_fn = `Iterator::map` call that discard the iterator's values @@ -379,6 +459,12 @@ lint_map_unit_fn = `Iterator::map` call that discard the iterator's values .map_label = after this call to map, the resulting iterator is `impl Iterator<Item = ()>`, which means the only information carried by the iterator is the number of items .suggestion = you might have meant to use `Iterator::for_each` +lint_metavariable_still_repeating = variable '{$name}' is still repeating at this depth + +lint_metavariable_wrong_operator = meta-variable repeats with different Kleene operator + +lint_missing_fragment_specifier = missing fragment specifier + lint_mixed_script_confusables = the usage of Script Group `{$set}` in this crate consists solely of mixed script confusables .includes_note = the usage includes {$includes} @@ -386,6 +472,11 @@ lint_mixed_script_confusables = lint_multiple_supertrait_upcastable = `{$ident}` is object-safe and has multiple supertraits +lint_named_argument_used_positionally = named argument `{$named_arg_name}` is not used by name + .label_named_arg = this named argument is referred to by position in formatting string + .label_position_arg = this formatting argument uses named argument `{$named_arg_name}` by position + .suggestion = use the named argument by name to avoid ambiguity + lint_node_source = `forbid` level set here .note = {$reason} @@ -497,6 +588,9 @@ lint_opaque_hidden_inferred_bound = opaque type `{$ty}` does not satisfy its ass lint_opaque_hidden_inferred_bound_sugg = add this bound +lint_or_patterns_back_compat = the meaning of the `pat` fragment specifier is changing in Rust 2021, which may affect this macro + .suggestion = use pat_param to preserve semantics + lint_overflowing_bin_hex = literal out of range for `{$ty}` .negative_note = the literal `{$lit}` (decimal `{$dec}`) does not fit into the type `{$ty}` .negative_becomes_note = and the value `-{$lit}` will become `{$actually}{$ty}` @@ -526,6 +620,21 @@ lint_path_statement_drop = path statement drops value lint_path_statement_no_effect = path statement with no effect +lint_pattern_in_bodiless = patterns aren't allowed in functions without bodies + .label = pattern not allowed in function without body + +lint_pattern_in_foreign = patterns aren't allowed in foreign function declarations + .label = pattern not allowed in foreign function + +lint_private_extern_crate_reexport = + extern crate `{$ident}` is private, and cannot be re-exported (error E0365), consider declaring with `pub` + +lint_proc_macro_back_compat = using an old version of `{$crate_name}` + .note = older versions of the `{$crate_name}` crate will stop compiling in future versions of Rust; please update to `{$crate_name}` v{$fixed_version}, or switch to one of the `{$crate_name}` alternatives + +lint_proc_macro_derive_resolution_fallback = cannot find {$ns} `{$ident}` in this scope + .label = names from parent modules are not accessible without an explicit import + lint_ptr_null_checks_fn_ptr = function pointers are not nullable, so checking them for null will always return false .help = wrap the function pointer inside an `Option` and use `Option::is_none` to check for null pointer value .label = expression has type `{$orig_ty}` @@ -547,6 +656,16 @@ lint_reason_must_be_string_literal = reason must be a string literal lint_reason_must_come_last = reason in lint attribute must come last +lint_redundant_import = the item `{$ident}` is imported redundantly + .label_imported_here = the item `{ident}` is already imported here + .label_defined_here = the item `{ident}` is already defined here + .label_imported_prelude = the item `{ident}` is already imported by the extern prelude + .label_defined_prelude = the item `{ident}` is already defined by the extern prelude + +lint_redundant_import_visibility = glob import doesn't reexport anything with visibility `{$import_vis}` because no imported item is public enough + .note = the most public imported item is `{$max_vis}` + .help = reduce the glob import's visibility or increase visibility of imported items + lint_redundant_semicolons = unnecessary trailing {$multiple -> [true] semicolons @@ -557,6 +676,8 @@ lint_redundant_semicolons = *[false] this semicolon } +lint_remove_mut_from_pattern = remove `mut` from the parameter + lint_removed_lint = lint `{$name}` has been removed: {$reason} lint_renamed_lint = lint `{$name}` has been renamed to `{$replace}` @@ -565,6 +686,22 @@ lint_renamed_lint = lint `{$name}` has been renamed to `{$replace}` lint_requested_level = requested on the command line with `{$level} {$lint_name}` +lint_reserved_prefix = prefix `{$prefix}` is unknown + .label = unknown prefix + .suggestion = insert whitespace here to avoid this being parsed as a prefix in Rust 2021 + +lint_shadowed_into_iter = + this method call resolves to `<&{$target} as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to `<{$target} as IntoIterator>::into_iter` in Rust {$edition} + .use_iter_suggestion = use `.iter()` instead of `.into_iter()` to avoid ambiguity + .remove_into_iter_suggestion = or remove `.into_iter()` to iterate by value + .use_explicit_into_iter_suggestion = + or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value + +lint_single_use_lifetime = lifetime parameter `{$ident}` only used once + .label_param = this lifetime... + .label_use = ...is used only here + .suggestion = elide the single-use lifetime + lint_span_use_eq_ctxt = use `.eq_ctxt()` instead of `.ctxt() == .ctxt()` lint_supertrait_as_deref_target = this `Deref` implementation is covered by an implicit supertrait coercion @@ -578,6 +715,10 @@ lint_suspicious_double_ref_clone = lint_suspicious_double_ref_deref = using `.deref()` on a double reference, which returns `{$ty}` instead of dereferencing the inner type +lint_trailing_semi_macro = trailing semicolon in macro used in expression position + .note1 = macro invocations at the end of a block are treated as expressions + .note2 = to ignore the value produced by the macro, add a semicolon after the invocation of `{$name}` + lint_ty_qualified = usage of qualified `ty::{$ty}` .suggestion = try importing it and using it unqualified @@ -591,12 +732,64 @@ lint_undropped_manually_drops = calls to `std::mem::drop` with `std::mem::Manual .label = argument has type `{$arg_ty}` .suggestion = use `std::mem::ManuallyDrop::into_inner` to get the inner value +lint_unexpected_cfg_add_build_rs_println = or consider adding `{$build_rs_println}` to the top of the `build.rs` +lint_unexpected_cfg_add_cargo_feature = consider using a Cargo feature instead +lint_unexpected_cfg_add_cargo_toml_lint_cfg = or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:{$cargo_toml_lint_cfg} +lint_unexpected_cfg_add_cmdline_arg = to expect this configuration use `{$cmdline_arg}` +lint_unexpected_cfg_define_features = consider defining some features in `Cargo.toml` +lint_unexpected_cfg_doc_cargo = see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration +lint_unexpected_cfg_doc_rustc = see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration + +lint_unexpected_cfg_name = unexpected `cfg` condition name: `{$name}` +lint_unexpected_cfg_name_expected_names = expected names are: {$possibilities}{$and_more -> + [0] {""} + *[other] {" "}and {$and_more} more + } +lint_unexpected_cfg_name_expected_values = expected values for `{$best_match}` are: {$possibilities} +lint_unexpected_cfg_name_similar_name = there is a config with a similar name +lint_unexpected_cfg_name_similar_name_different_values = there is a config with a similar name and different values +lint_unexpected_cfg_name_similar_name_no_value = there is a config with a similar name and no value +lint_unexpected_cfg_name_similar_name_value = there is a config with a similar name and value +lint_unexpected_cfg_name_with_similar_value = found config with similar value + +lint_unexpected_cfg_value = unexpected `cfg` condition value: {$has_value -> + [true] `{$value}` + *[false] (none) + } +lint_unexpected_cfg_value_add_feature = consider adding `{$value}` as a feature in `Cargo.toml` +lint_unexpected_cfg_value_expected_values = expected values for `{$name}` are: {$have_none_possibility -> + [true] {"(none), "} + *[false] {""} + }{$possibilities}{$and_more -> + [0] {""} + *[other] {" "}and {$and_more} more + } +lint_unexpected_cfg_value_no_expected_value = no expected value for `{$name}` +lint_unexpected_cfg_value_no_expected_values = no expected values for `{$name}` +lint_unexpected_cfg_value_remove_condition = remove the condition +lint_unexpected_cfg_value_remove_value = remove the value +lint_unexpected_cfg_value_similar_name = there is a expected value with a similar name +lint_unexpected_cfg_value_specify_value = specify a config value + lint_ungated_async_fn_track_caller = `#[track_caller]` on async functions is a no-op .label = this function will not propagate the caller location +lint_unicode_text_flow = unicode codepoint changing visible direction of text present in comment + .label = {$num_codepoints -> + [1] this comment contains an invisible unicode text flow control codepoint + *[other] this comment contains invisible unicode text flow control codepoints + } + .note = these kind of unicode codepoints change the way text flows on applications that support them, but can cause confusion because they change the order of characters on the screen + .suggestion = if their presence wasn't intentional, you can remove them + .label_comment_char = {$c_debug} + + lint_unit_bindings = binding has unit type `()` .label = this pattern is inferred to be the unit type `()` +lint_unknown_diagnostic_attribute = unknown diagnostic attribute +lint_unknown_diagnostic_attribute_typo_sugg = an attribute with a similar name exists + lint_unknown_gated_lint = unknown lint: `{$name}` .note = the `{$name}` lint is unstable @@ -612,9 +805,16 @@ lint_unknown_lint = *[false] did you mean: `{$replace}` } +lint_unknown_macro_variable = unknown macro variable `{$name}` + lint_unknown_tool_in_scoped_lint = unknown tool name `{$tool_name}` found in scoped lint: `{$tool_name}::{$lint_name}` .help = add `#![register_tool({$tool_name})]` to the crate root +lint_unnameable_test_items = cannot test inner items + +lint_unnecessary_qualification = unnecessary qualification + .suggestion = remove the unnecessary path segments + lint_unsupported_group = `{$lint_group}` lint group is not supported with ´--force-warn´ lint_untranslatable_diag = diagnostics should be created using translatable messages @@ -622,6 +822,9 @@ lint_untranslatable_diag = diagnostics should be created using translatable mess lint_unused_allocation = unnecessary allocation, use `&` instead lint_unused_allocation_mut = unnecessary allocation, use `&mut` instead +lint_unused_builtin_attribute = unused attribute `{$attr_name}` + .note = the built-in attribute `{$attr_name}` will be ignored, since it's applied to the macro invocation `{$macro_name}` + lint_unused_closure = unused {$pre}{$count -> [one] closure @@ -638,14 +841,43 @@ lint_unused_coroutine = }{$post} that must be used .note = coroutines are lazy and do nothing unless resumed +lint_unused_crate_dependency = external crate `{$extern_crate}` unused in `{$local_crate}`: remove the dependency or add `use {$extern_crate} as _;` + lint_unused_def = unused {$pre}`{$def}`{$post} that must be used .suggestion = use `let _ = ...` to ignore the resulting value lint_unused_delim = unnecessary {$delim} around {$item} .suggestion = remove these {$delim} +lint_unused_doc_comment = unused doc comment + .label = rustdoc does not generate documentation for macro invocations + .help = to document an item produced by a macro, the macro must produce the documentation as part of its expansion + +lint_unused_extern_crate = unused extern crate + .suggestion = remove it + lint_unused_import_braces = braces around {$node} is unnecessary +lint_unused_imports = {$num_snippets -> + [one] unused import: {$span_snippets} + *[other] unused imports: {$span_snippets} + } + .suggestion_remove_whole_use = remove the whole `use` item + .suggestion_remove_imports = {$num_to_remove -> + [one] remove the unused import + *[other] remove the unused imports + } + .help = if this is a test module, consider adding a `#[cfg(test)]` to the containing module + +lint_unused_label = unused label + +lint_unused_lifetime = lifetime parameter `{$ident}` never used + .suggestion = elide the unused lifetime + +lint_unused_macro_definition = unused macro definition: `{$name}` + +lint_unused_macro_use = unused `#[macro_use]` import + lint_unused_op = unused {$op} that must be used .label = the {$op} produces a value .suggestion = use `let _ = ...` to ignore the resulting value @@ -654,3 +886,6 @@ lint_unused_result = unused result of type `{$ty}` lint_variant_size_differences = enum variant is more than three times larger ({$largest} bytes) than the next largest + +lint_wasm_c_abi = + older versions of the `wasm-bindgen` crate will be incompatible with future versions of Rust; please update to `wasm-bindgen` v0.2.88 diff --git a/compiler/rustc_lint/src/array_into_iter.rs b/compiler/rustc_lint/src/array_into_iter.rs deleted file mode 100644 index 8f4bae33957..00000000000 --- a/compiler/rustc_lint/src/array_into_iter.rs +++ /dev/null @@ -1,144 +0,0 @@ -use crate::{ - lints::{ArrayIntoIterDiag, ArrayIntoIterDiagSub}, - LateContext, LateLintPass, LintContext, -}; -use rustc_hir as hir; -use rustc_middle::bug; -use rustc_middle::ty; -use rustc_middle::ty::adjustment::{Adjust, Adjustment}; -use rustc_session::lint::FutureIncompatibilityReason; -use rustc_session::{declare_lint, impl_lint_pass}; -use rustc_span::edition::Edition; -use rustc_span::symbol::sym; -use rustc_span::Span; - -declare_lint! { - /// The `array_into_iter` lint detects calling `into_iter` on arrays. - /// - /// ### Example - /// - /// ```rust,edition2018 - /// # #![allow(unused)] - /// [1, 2, 3].into_iter().for_each(|n| { *n; }); - /// ``` - /// - /// {{produces}} - /// - /// ### Explanation - /// - /// Since Rust 1.53, arrays implement `IntoIterator`. However, to avoid - /// breakage, `array.into_iter()` in Rust 2015 and 2018 code will still - /// behave as `(&array).into_iter()`, returning an iterator over - /// references, just like in Rust 1.52 and earlier. - /// This only applies to the method call syntax `array.into_iter()`, not to - /// any other syntax such as `for _ in array` or `IntoIterator::into_iter(array)`. - pub ARRAY_INTO_ITER, - Warn, - "detects calling `into_iter` on arrays in Rust 2015 and 2018", - @future_incompatible = FutureIncompatibleInfo { - reason: FutureIncompatibilityReason::EditionSemanticsChange(Edition::Edition2021), - reference: "<https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>", - }; -} - -#[derive(Copy, Clone, Default)] -pub struct ArrayIntoIter { - for_expr_span: Span, -} - -impl_lint_pass!(ArrayIntoIter => [ARRAY_INTO_ITER]); - -impl<'tcx> LateLintPass<'tcx> for ArrayIntoIter { - fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'tcx>) { - // Save the span of expressions in `for _ in expr` syntax, - // so we can give a better suggestion for those later. - if let hir::ExprKind::Match(arg, [_], hir::MatchSource::ForLoopDesugar) = &expr.kind { - if let hir::ExprKind::Call(path, [arg]) = &arg.kind { - if let hir::ExprKind::Path(hir::QPath::LangItem( - hir::LangItem::IntoIterIntoIter, - .., - )) = &path.kind - { - self.for_expr_span = arg.span; - } - } - } - - // We only care about method call expressions. - if let hir::ExprKind::MethodCall(call, receiver_arg, ..) = &expr.kind { - if call.ident.name != sym::into_iter { - return; - } - - // Check if the method call actually calls the libcore - // `IntoIterator::into_iter`. - let def_id = cx.typeck_results().type_dependent_def_id(expr.hir_id).unwrap(); - match cx.tcx.trait_of_item(def_id) { - Some(trait_id) if cx.tcx.is_diagnostic_item(sym::IntoIterator, trait_id) => {} - _ => return, - }; - - // As this is a method call expression, we have at least one argument. - let receiver_ty = cx.typeck_results().expr_ty(receiver_arg); - let adjustments = cx.typeck_results().expr_adjustments(receiver_arg); - - let Some(Adjustment { kind: Adjust::Borrow(_), target }) = adjustments.last() else { - return; - }; - - let types = - std::iter::once(receiver_ty).chain(adjustments.iter().map(|adj| adj.target)); - - let mut found_array = false; - - for ty in types { - match ty.kind() { - // If we run into a &[T; N] or &[T] first, there's nothing to warn about. - // It'll resolve to the reference version. - ty::Ref(_, inner_ty, _) if inner_ty.is_array() => return, - ty::Ref(_, inner_ty, _) if matches!(inner_ty.kind(), ty::Slice(..)) => return, - // Found an actual array type without matching a &[T; N] first. - // This is the problematic case. - ty::Array(..) => { - found_array = true; - break; - } - _ => {} - } - } - - if !found_array { - return; - } - - // Emit lint diagnostic. - let target = match *target.kind() { - ty::Ref(_, inner_ty, _) if inner_ty.is_array() => "[T; N]", - ty::Ref(_, inner_ty, _) if matches!(inner_ty.kind(), ty::Slice(..)) => "[T]", - // We know the original first argument type is an array type, - // we know that the first adjustment was an autoref coercion - // and we know that `IntoIterator` is the trait involved. The - // array cannot be coerced to something other than a reference - // to an array or to a slice. - _ => bug!("array type coerced to something other than array or slice"), - }; - let sub = if self.for_expr_span == expr.span { - Some(ArrayIntoIterDiagSub::RemoveIntoIter { - span: receiver_arg.span.shrink_to_hi().to(expr.span.shrink_to_hi()), - }) - } else if receiver_ty.is_array() { - Some(ArrayIntoIterDiagSub::UseExplicitIntoIter { - start_span: expr.span.shrink_to_lo(), - end_span: receiver_arg.span.shrink_to_hi().to(expr.span.shrink_to_hi()), - }) - } else { - None - }; - cx.emit_span_lint( - ARRAY_INTO_ITER, - call.ident.span, - ArrayIntoIterDiag { target, suggestion: call.ident.span, sub }, - ); - } - } -} diff --git a/compiler/rustc_lint/src/builtin.rs b/compiler/rustc_lint/src/builtin.rs index 6b9f9d1531e..0f059bceae7 100644 --- a/compiler/rustc_lint/src/builtin.rs +++ b/compiler/rustc_lint/src/builtin.rs @@ -30,10 +30,10 @@ use crate::{ BuiltinExplicitOutlivesSuggestion, BuiltinFeatureIssueNote, BuiltinIncompleteFeatures, BuiltinIncompleteFeaturesHelp, BuiltinInternalFeatures, BuiltinKeywordIdents, BuiltinMissingCopyImpl, BuiltinMissingDebugImpl, BuiltinMissingDoc, - BuiltinMutablesTransmutes, BuiltinNoMangleGeneric, BuiltinNonShorthandFieldPatterns, - BuiltinSpecialModuleNameUsed, BuiltinTrivialBounds, BuiltinTypeAliasGenericBounds, - BuiltinTypeAliasGenericBoundsSuggestion, BuiltinTypeAliasWhereClause, - BuiltinUngatedAsyncFnTrackCaller, BuiltinUnpermittedTypeInit, + BuiltinMutablesTransmutes, BuiltinNamedAsmLabel, BuiltinNoMangleGeneric, + BuiltinNonShorthandFieldPatterns, BuiltinSpecialModuleNameUsed, BuiltinTrivialBounds, + BuiltinTypeAliasGenericBounds, BuiltinTypeAliasGenericBoundsSuggestion, + BuiltinTypeAliasWhereClause, BuiltinUngatedAsyncFnTrackCaller, BuiltinUnpermittedTypeInit, BuiltinUnpermittedTypeInitSub, BuiltinUnreachablePub, BuiltinUnsafe, BuiltinUnstableFeatures, BuiltinUnusedDocComment, BuiltinUnusedDocCommentSub, BuiltinWhileTrue, SuggestChangingAssocTypes, @@ -60,7 +60,7 @@ use rustc_middle::ty::GenericArgKind; use rustc_middle::ty::TypeVisitableExt; use rustc_middle::ty::Upcast; use rustc_middle::ty::{self, Ty, TyCtxt, VariantDef}; -use rustc_session::lint::{BuiltinLintDiag, FutureIncompatibilityReason}; +use rustc_session::lint::FutureIncompatibilityReason; use rustc_session::{declare_lint, declare_lint_pass, impl_lint_pass}; use rustc_span::edition::Edition; use rustc_span::source_map::Spanned; @@ -2882,16 +2882,7 @@ impl<'tcx> LateLintPass<'tcx> for NamedAsmLabels { let target_spans: MultiSpan = if spans.len() > 0 { spans.into() } else { (*template_span).into() }; - cx.span_lint_with_diagnostics( - NAMED_ASM_LABELS, - Some(target_spans), - fluent::lint_builtin_asm_labels, - |_| {}, - BuiltinLintDiag::NamedAsmLabel( - "only local labels of the form `<number>:` should be used in inline asm" - .to_string(), - ), - ); + cx.emit_span_lint(NAMED_ASM_LABELS, target_spans, BuiltinNamedAsmLabel); } } } diff --git a/compiler/rustc_lint/src/context.rs b/compiler/rustc_lint/src/context.rs index 62ba9ef5c11..deeb3ae090c 100644 --- a/compiler/rustc_lint/src/context.rs +++ b/compiler/rustc_lint/src/context.rs @@ -527,30 +527,24 @@ pub struct EarlyContext<'a> { pub buffered: LintBuffer, } -pub trait LintContext { - fn sess(&self) -> &Session; - +impl EarlyContext<'_> { /// Emit a lint at the appropriate level, with an optional associated span and an existing /// diagnostic. /// /// [`lint_level`]: rustc_middle::lint::lint_level#decorate-signature #[rustc_lint_diagnostics] - fn span_lint_with_diagnostics( + pub fn span_lint_with_diagnostics( &self, lint: &'static Lint, - span: Option<impl Into<MultiSpan>>, - msg: impl Into<DiagMessage>, - decorate: impl for<'a, 'b> FnOnce(&'b mut Diag<'a, ()>), + span: MultiSpan, diagnostic: BuiltinLintDiag, ) { - // We first generate a blank diagnostic. - self.opt_span_lint(lint, span, msg, |db| { - // Now, set up surrounding context. - diagnostics::builtin(self.sess(), diagnostic, db); - // Rewrap `db`, and pass control to the user. - decorate(db) - }); + diagnostics::emit_buffered_lint(self, lint, span, diagnostic) } +} + +pub trait LintContext { + fn sess(&self) -> &Session; // FIXME: These methods should not take an Into<MultiSpan> -- instead, callers should need to // set the span in their `decorate` function (preferably using set_span). diff --git a/compiler/rustc_lint/src/context/diagnostics.rs b/compiler/rustc_lint/src/context/diagnostics.rs index 5ad3ff71a6d..236eeee6152 100644 --- a/compiler/rustc_lint/src/context/diagnostics.rs +++ b/compiler/rustc_lint/src/context/diagnostics.rs @@ -1,58 +1,57 @@ #![allow(rustc::diagnostic_outside_of_impl)] #![allow(rustc::untranslatable_diagnostic)] +use std::borrow::Cow; + use rustc_ast::util::unicode::TEXT_FLOW_CONTROL_CHARS; -use rustc_errors::{elided_lifetime_in_path_suggestion, Diag}; -use rustc_errors::{Applicability, SuggestionStyle}; +use rustc_errors::Applicability; +use rustc_errors::{elided_lifetime_in_path_suggestion, DiagArgValue, MultiSpan}; use rustc_middle::middle::stability; -use rustc_session::lint::BuiltinLintDiag; -use rustc_session::Session; +use rustc_session::lint::{BuiltinLintDiag, Lint}; use rustc_span::BytePos; +use crate::{lints, EarlyContext, LintContext as _}; + mod check_cfg; -pub(super) fn builtin(sess: &Session, diagnostic: BuiltinLintDiag, diag: &mut Diag<'_, ()>) { +pub(super) fn emit_buffered_lint( + ctx: &EarlyContext<'_>, + lint: &'static Lint, + span: MultiSpan, + diagnostic: BuiltinLintDiag, +) { + let sess = ctx.sess(); match diagnostic { - BuiltinLintDiag::UnicodeTextFlow(span, content) => { + BuiltinLintDiag::UnicodeTextFlow(comment_span, content) => { let spans: Vec<_> = content .char_indices() .filter_map(|(i, c)| { TEXT_FLOW_CONTROL_CHARS.contains(&c).then(|| { - let lo = span.lo() + BytePos(2 + i as u32); - (c, span.with_lo(lo).with_hi(lo + BytePos(c.len_utf8() as u32))) + let lo = comment_span.lo() + BytePos(2 + i as u32); + (c, comment_span.with_lo(lo).with_hi(lo + BytePos(c.len_utf8() as u32))) }) }) .collect(); - let (an, s) = match spans.len() { - 1 => ("an ", ""), - _ => ("", "s"), - }; - diag.span_label( + let characters = spans + .iter() + .map(|&(c, span)| lints::UnicodeCharNoteSub { span, c_debug: format!("{c:?}") }) + .collect(); + let suggestions = (!spans.is_empty()).then_some(lints::UnicodeTextFlowSuggestion { + spans: spans.iter().map(|(_c, span)| *span).collect(), + }); + ctx.emit_span_lint( + lint, span, - format!( - "this comment contains {an}invisible unicode text flow control codepoint{s}", - ), - ); - for (c, span) in &spans { - diag.span_label(*span, format!("{c:?}")); - } - diag.note( - "these kind of unicode codepoints change the way text flows on \ - applications that support them, but can cause confusion because they \ - change the order of characters on the screen", - ); - if !spans.is_empty() { - diag.multipart_suggestion_with_style( - "if their presence wasn't intentional, you can remove them", - spans.into_iter().map(|(_, span)| (span, "".to_string())).collect(), - Applicability::MachineApplicable, - SuggestionStyle::HideCodeAlways, - ); - } - } - BuiltinLintDiag::Normal => (), - BuiltinLintDiag::AbsPathWithModule(span) => { - let (sugg, app) = match sess.source_map().span_to_snippet(span) { + lints::UnicodeTextFlow { + comment_span, + characters, + suggestions, + num_codepoints: spans.len(), + }, + ) + } + BuiltinLintDiag::AbsPathWithModule(mod_span) => { + let (replacement, applicability) = match sess.source_map().span_to_snippet(mod_span) { Ok(ref s) => { // FIXME(Manishearth) ideally the emitting code // can tell us whether or not this is global @@ -62,160 +61,207 @@ pub(super) fn builtin(sess: &Session, diagnostic: BuiltinLintDiag, diag: &mut Di } Err(_) => ("crate::<path>".to_string(), Applicability::HasPlaceholders), }; - diag.span_suggestion(span, "use `crate`", sugg, app); - } - BuiltinLintDiag::ProcMacroDeriveResolutionFallback(span) => { - diag.span_label( + ctx.emit_span_lint( + lint, span, - "names from parent modules are not accessible without an explicit import", + lints::AbsPathWithModule { + sugg: lints::AbsPathWithModuleSugg { + span: mod_span, + applicability, + replacement, + }, + }, ); } - BuiltinLintDiag::MacroExpandedMacroExportsAccessedByAbsolutePaths(span_def) => { - diag.span_note(span_def, "the macro is defined here"); - } + BuiltinLintDiag::ProcMacroDeriveResolutionFallback { span: macro_span, ns, ident } => ctx + .emit_span_lint( + lint, + span, + lints::ProcMacroDeriveResolutionFallback { span: macro_span, ns, ident }, + ), + BuiltinLintDiag::MacroExpandedMacroExportsAccessedByAbsolutePaths(span_def) => ctx + .emit_span_lint( + lint, + span, + lints::MacroExpandedMacroExportsAccessedByAbsolutePaths { definition: span_def }, + ), BuiltinLintDiag::ElidedLifetimesInPaths(n, path_span, incl_angl_brckt, insertion_span) => { - diag.subdiagnostic( - sess.dcx(), - elided_lifetime_in_path_suggestion( - sess.source_map(), - n, - path_span, - incl_angl_brckt, - insertion_span, - ), + ctx.emit_span_lint( + lint, + span, + lints::ElidedLifetimesInPaths { + subdiag: elided_lifetime_in_path_suggestion( + sess.source_map(), + n, + path_span, + incl_angl_brckt, + insertion_span, + ), + }, ); } - BuiltinLintDiag::UnknownCrateTypes(span, note, sugg) => { - diag.span_suggestion(span, note, sugg, Applicability::MaybeIncorrect); - } - BuiltinLintDiag::UnusedImports(message, replaces, in_test_module) => { - if !replaces.is_empty() { - diag.tool_only_multipart_suggestion( - message, - replaces, - Applicability::MachineApplicable, - ); - } + BuiltinLintDiag::UnknownCrateTypes { span, candidate } => { + let sugg = candidate.map(|candidate| lints::UnknownCrateTypesSub { span, candidate }); + ctx.emit_span_lint(lint, span, lints::UnknownCrateTypes { sugg }); + } + BuiltinLintDiag::UnusedImports { + remove_whole_use, + num_to_remove, + remove_spans, + test_module_span, + span_snippets, + } => { + let sugg = if remove_whole_use { + lints::UnusedImportsSugg::RemoveWholeUse { span: remove_spans[0] } + } else { + lints::UnusedImportsSugg::RemoveImports { remove_spans, num_to_remove } + }; + let test_module_span = + test_module_span.map(|span| sess.source_map().guess_head_span(span)); - if let Some(span) = in_test_module { - diag.span_help( - sess.source_map().guess_head_span(span), - "if this is a test module, consider adding a `#[cfg(test)]` to the containing module", - ); - } + ctx.emit_span_lint( + lint, + span, + lints::UnusedImports { + sugg, + test_module_span, + num_snippets: span_snippets.len(), + span_snippets: DiagArgValue::StrListSepByAnd( + span_snippets.into_iter().map(Cow::Owned).collect(), + ), + }, + ); } BuiltinLintDiag::RedundantImport(spans, ident) => { - for (span, is_imported) in spans { - let introduced = if is_imported { "imported" } else { "defined" }; - let span_msg = if span.is_dummy() { "by the extern prelude" } else { "here" }; - diag.span_label( - span, - format!("the item `{ident}` is already {introduced} {span_msg}"), - ); - } - } - BuiltinLintDiag::DeprecatedMacro(suggestion, span) => { - stability::deprecation_suggestion(diag, "macro", suggestion, span) - } - BuiltinLintDiag::UnusedDocComment(span) => { - diag.span_label(span, "rustdoc does not generate documentation for macro invocations"); - diag.help("to document an item produced by a macro, \ - the macro must produce the documentation as part of its expansion"); - } - BuiltinLintDiag::PatternsInFnsWithoutBody(span, ident) => { - diag.span_suggestion( + let subs = spans + .into_iter() + .map(|(span, is_imported)| { + (match (span.is_dummy(), is_imported) { + (false, true) => lints::RedundantImportSub::ImportedHere, + (false, false) => lints::RedundantImportSub::DefinedHere, + (true, true) => lints::RedundantImportSub::ImportedPrelude, + (true, false) => lints::RedundantImportSub::DefinedPrelude, + })(span) + }) + .collect(); + ctx.emit_span_lint(lint, span, lints::RedundantImport { subs, ident }); + } + BuiltinLintDiag::DeprecatedMacro { + suggestion, + suggestion_span, + note, + path, + since_kind, + } => { + let sub = suggestion.map(|suggestion| stability::DeprecationSuggestion { + span: suggestion_span, + kind: "macro".to_owned(), + suggestion, + }); + ctx.emit_span_lint( + lint, span, - "remove `mut` from the parameter", - ident, - Applicability::MachineApplicable, + stability::Deprecated { sub, kind: "macro".to_owned(), path, note, since_kind }, ); } - BuiltinLintDiag::MissingAbi(span, default_abi) => { - diag.span_label(span, "ABI should be specified here"); - diag.help(format!("the default ABI is {}", default_abi.name())); + BuiltinLintDiag::UnusedDocComment(attr_span) => { + ctx.emit_span_lint(lint, span, lints::UnusedDocComment { span: attr_span }); } - BuiltinLintDiag::LegacyDeriveHelpers(span) => { - diag.span_label(span, "the attribute is introduced here"); + BuiltinLintDiag::PatternsInFnsWithoutBody { span: remove_span, ident, is_foreign } => { + let sub = lints::PatternsInFnsWithoutBodySub { ident, span: remove_span }; + + ctx.emit_span_lint( + lint, + span, + if is_foreign { + lints::PatternsInFnsWithoutBody::Foreign { sub } + } else { + lints::PatternsInFnsWithoutBody::Bodiless { sub } + }, + ); } - BuiltinLintDiag::ProcMacroBackCompat(note) => { - diag.note(note); + BuiltinLintDiag::MissingAbi(label_span, default_abi) => { + ctx.emit_span_lint( + lint, + span, + lints::MissingAbi { span: label_span, default_abi: default_abi.name() }, + ); } - BuiltinLintDiag::OrPatternsBackCompat(span, suggestion) => { - diag.span_suggestion( + BuiltinLintDiag::LegacyDeriveHelpers(label_span) => { + ctx.emit_span_lint(lint, span, lints::LegacyDeriveHelpers { span: label_span }); + } + BuiltinLintDiag::ProcMacroBackCompat { crate_name, fixed_version } => { + ctx.emit_span_lint( + lint, span, - "use pat_param to preserve semantics", - suggestion, - Applicability::MachineApplicable, + lints::ProcMacroBackCompat { crate_name, fixed_version }, + ); + } + BuiltinLintDiag::OrPatternsBackCompat(suggestion_span, suggestion) => { + ctx.emit_span_lint( + lint, + span, + lints::OrPatternsBackCompat { span: suggestion_span, suggestion }, ); } - BuiltinLintDiag::ReservedPrefix(span) => { - diag.span_label(span, "unknown prefix"); - diag.span_suggestion_verbose( - span.shrink_to_hi(), - "insert whitespace here to avoid this being parsed as a prefix in Rust 2021", - " ", - Applicability::MachineApplicable, + BuiltinLintDiag::ReservedPrefix(label_span, prefix) => { + ctx.emit_span_lint( + lint, + span, + lints::ReservedPrefix { + label: label_span, + suggestion: label_span.shrink_to_hi(), + prefix, + }, ); } BuiltinLintDiag::UnusedBuiltinAttribute { attr_name, macro_name, invoc_span } => { - diag.span_note( - invoc_span, - format!("the built-in attribute `{attr_name}` will be ignored, since it's applied to the macro invocation `{macro_name}`") - ); + ctx.emit_span_lint( + lint, + span, + lints::UnusedBuiltinAttribute { invoc_span, attr_name, macro_name }, + ); } BuiltinLintDiag::TrailingMacro(is_trailing, name) => { - if is_trailing { - diag.note("macro invocations at the end of a block are treated as expressions"); - diag.note(format!("to ignore the value produced by the macro, add a semicolon after the invocation of `{name}`")); - } - } - BuiltinLintDiag::BreakWithLabelAndLoop(span) => { - diag.multipart_suggestion( - "wrap this expression in parentheses", - vec![ - (span.shrink_to_lo(), "(".to_string()), - (span.shrink_to_hi(), ")".to_string()), - ], - Applicability::MachineApplicable, - ); + ctx.emit_span_lint(lint, span, lints::TrailingMacro { is_trailing, name }); } - BuiltinLintDiag::NamedAsmLabel(help) => { - diag.help(help); - diag.note("see the asm section of Rust By Example <https://doc.rust-lang.org/nightly/rust-by-example/unsafe/asm.html#labels> for more information"); + BuiltinLintDiag::BreakWithLabelAndLoop(sugg_span) => { + ctx.emit_span_lint( + lint, + span, + lints::BreakWithLabelAndLoop { + sub: lints::BreakWithLabelAndLoopSub { + left: sugg_span.shrink_to_lo(), + right: sugg_span.shrink_to_hi(), + }, + }, + ); } BuiltinLintDiag::UnexpectedCfgName(name, value) => { - check_cfg::unexpected_cfg_name(sess, diag, name, value) + ctx.emit_span_lint(lint, span, check_cfg::unexpected_cfg_name(sess, name, value)); } BuiltinLintDiag::UnexpectedCfgValue(name, value) => { - check_cfg::unexpected_cfg_value(sess, diag, name, value) - } - BuiltinLintDiag::DeprecatedWhereclauseLocation(sugg) => { - let left_sp = diag.span.primary_span().unwrap(); - match sugg { - Some((right_sp, sugg)) => diag.multipart_suggestion( - "move it to the end of the type declaration", - vec![(left_sp, String::new()), (right_sp, sugg)], - Applicability::MachineApplicable, - ), - None => diag.span_suggestion( - left_sp, - "remove this `where`", - "", - Applicability::MachineApplicable, - ), + ctx.emit_span_lint(lint, span, check_cfg::unexpected_cfg_value(sess, name, value)); + } + BuiltinLintDiag::DeprecatedWhereclauseLocation(left_sp, sugg) => { + let suggestion = match sugg { + Some((right_sp, sugg)) => lints::DeprecatedWhereClauseLocationSugg::MoveToEnd { + left: left_sp, + right: right_sp, + sugg, + }, + None => lints::DeprecatedWhereClauseLocationSugg::RemoveWhere { span: left_sp }, }; - diag.note("see issue #89122 <https://github.com/rust-lang/rust/issues/89122> for more information"); + ctx.emit_span_lint(lint, span, lints::DeprecatedWhereClauseLocation { suggestion }); } BuiltinLintDiag::SingleUseLifetime { param_span, use_span: Some((use_span, elide)), deletion_span, + ident, } => { debug!(?param_span, ?use_span, ?deletion_span); - diag.span_label(param_span, "this lifetime..."); - diag.span_label(use_span, "...is used only here"); - if let Some(deletion_span) = deletion_span { - let msg = "elide the single-use lifetime"; + let suggestion = if let Some(deletion_span) = deletion_span { let (use_span, replace_lt) = if elide { let use_span = sess.source_map().span_extend_while_whitespace(use_span); (use_span, String::new()) @@ -226,24 +272,22 @@ pub(super) fn builtin(sess: &Session, diagnostic: BuiltinLintDiag, diag: &mut Di // issue 107998 for the case such as a wrong function pointer type // `deletion_span` is empty and there is no need to report lifetime uses here - let suggestions = if deletion_span.is_empty() { - vec![(use_span, replace_lt)] - } else { - vec![(deletion_span, String::new()), (use_span, replace_lt)] - }; - diag.multipart_suggestion(msg, suggestions, Applicability::MachineApplicable); - } + let deletion_span = + if deletion_span.is_empty() { None } else { Some(deletion_span) }; + Some(lints::SingleUseLifetimeSugg { deletion_span, use_span, replace_lt }) + } else { + None + }; + + ctx.emit_span_lint( + lint, + span, + lints::SingleUseLifetime { suggestion, param_span, use_span, ident }, + ); } - BuiltinLintDiag::SingleUseLifetime { param_span: _, use_span: None, deletion_span } => { + BuiltinLintDiag::SingleUseLifetime { use_span: None, deletion_span, ident, .. } => { debug!(?deletion_span); - if let Some(deletion_span) = deletion_span { - diag.span_suggestion( - deletion_span, - "elide the unused lifetime", - "", - Applicability::MachineApplicable, - ); - } + ctx.emit_span_lint(lint, span, lints::UnusedLifetime { deletion_span, ident }); } BuiltinLintDiag::NamedArgumentUsedPositionally { position_sp_to_replace, @@ -252,19 +296,12 @@ pub(super) fn builtin(sess: &Session, diagnostic: BuiltinLintDiag, diag: &mut Di named_arg_name, is_formatting_arg, } => { - diag.span_label( - named_arg_sp, - "this named argument is referred to by position in formatting string", - ); - if let Some(positional_arg_for_msg) = position_sp_for_msg { - let msg = format!( - "this formatting argument uses named argument `{named_arg_name}` by position" - ); - diag.span_label(positional_arg_for_msg, msg); - } - - if let Some(positional_arg_to_replace) = position_sp_to_replace { - let name = if is_formatting_arg { named_arg_name + "$" } else { named_arg_name }; + let (suggestion, name) = if let Some(positional_arg_to_replace) = position_sp_to_replace + { + let mut name = named_arg_name.clone(); + if is_formatting_arg { + name.push('$') + }; let span_to_replace = if let Ok(positional_arg_content) = sess.source_map().span_to_snippet(positional_arg_to_replace) && positional_arg_content.starts_with(':') @@ -273,31 +310,40 @@ pub(super) fn builtin(sess: &Session, diagnostic: BuiltinLintDiag, diag: &mut Di } else { positional_arg_to_replace }; - diag.span_suggestion_verbose( - span_to_replace, - "use the named argument by name to avoid ambiguity", + (Some(span_to_replace), name) + } else { + (None, String::new()) + }; + + ctx.emit_span_lint( + lint, + span, + lints::NamedArgumentUsedPositionally { + named_arg_sp, + position_label_sp: position_sp_for_msg, + suggestion, name, - Applicability::MaybeIncorrect, - ); - } + named_arg_name, + }, + ) } - BuiltinLintDiag::ByteSliceInPackedStructWithDerive => { - diag.help("consider implementing the trait by hand, or remove the `packed` attribute"); + BuiltinLintDiag::ByteSliceInPackedStructWithDerive { ty } => { + ctx.emit_span_lint(lint, span, lints::ByteSliceInPackedStructWithDerive { ty }) } BuiltinLintDiag::UnusedExternCrate { removal_span } => { - diag.span_suggestion(removal_span, "remove it", "", Applicability::MachineApplicable); + ctx.emit_span_lint(lint, span, lints::UnusedExternCrate { removal_span }) } BuiltinLintDiag::ExternCrateNotIdiomatic { vis_span, ident_span } => { let suggestion_span = vis_span.between(ident_span); - diag.span_suggestion_verbose( - suggestion_span, - "convert it to a `use`", - if vis_span.is_empty() { "use " } else { " use " }, - Applicability::MachineApplicable, + let code = if vis_span.is_empty() { "use " } else { " use " }; + ctx.emit_span_lint( + lint, + span, + lints::ExternCrateNotIdiomatic { span: suggestion_span, code }, ); } BuiltinLintDiag::AmbiguousGlobImports { diag: ambiguity } => { - rustc_errors::report_ambiguity_error(diag, ambiguity); + ctx.emit_span_lint(lint, span, lints::AmbiguousGlobImports { ambiguity }); } BuiltinLintDiag::AmbiguousGlobReexports { name, @@ -305,15 +351,15 @@ pub(super) fn builtin(sess: &Session, diagnostic: BuiltinLintDiag, diag: &mut Di first_reexport_span, duplicate_reexport_span, } => { - diag.span_label( - first_reexport_span, - format!("the name `{name}` in the {namespace} namespace is first re-exported here"), - ); - diag.span_label( - duplicate_reexport_span, - format!( - "but the name `{name}` in the {namespace} namespace is also re-exported here" - ), + ctx.emit_span_lint( + lint, + span, + lints::AmbiguousGlobReexports { + first_reexport: first_reexport_span, + duplicate_reexport: duplicate_reexport_span, + name, + namespace, + }, ); } BuiltinLintDiag::HiddenGlobReexports { @@ -322,38 +368,127 @@ pub(super) fn builtin(sess: &Session, diagnostic: BuiltinLintDiag, diag: &mut Di glob_reexport_span, private_item_span, } => { - diag.span_note(glob_reexport_span, format!("the name `{name}` in the {namespace} namespace is supposed to be publicly re-exported here")); - diag.span_note(private_item_span, "but the private item here shadows it".to_owned()); - } - BuiltinLintDiag::UnusedQualifications { removal_span } => { - diag.span_suggestion_verbose( - removal_span, - "remove the unnecessary path segments", - "", - Applicability::MachineApplicable, + ctx.emit_span_lint( + lint, + span, + lints::HiddenGlobReexports { + glob_reexport: glob_reexport_span, + private_item: private_item_span, + + name, + namespace, + }, ); } - BuiltinLintDiag::AssociatedConstElidedLifetime { elided, span } => { - diag.span_suggestion_verbose( - if elided { span.shrink_to_hi() } else { span }, - "use the `'static` lifetime", - if elided { "'static " } else { "'static" }, - Applicability::MachineApplicable, - ); + BuiltinLintDiag::UnusedQualifications { removal_span } => { + ctx.emit_span_lint(lint, span, lints::UnusedQualifications { removal_span }); } - BuiltinLintDiag::RedundantImportVisibility { max_vis, span } => { - diag.span_note(span, format!("the most public imported item is `{max_vis}`")); - diag.help( - "reduce the glob import's visibility or increase visibility of imported items", + BuiltinLintDiag::AssociatedConstElidedLifetime { elided, span: lt_span } => { + let lt_span = if elided { lt_span.shrink_to_hi() } else { lt_span }; + let code = if elided { "'static " } else { "'static" }; + ctx.emit_span_lint( + lint, + span, + lints::AssociatedConstElidedLifetime { span: lt_span, code, elided }, ); } - BuiltinLintDiag::MaybeTypo { span, name } => { - diag.span_suggestion_verbose( + BuiltinLintDiag::RedundantImportVisibility { max_vis, span: vis_span, import_vis } => { + ctx.emit_span_lint( + lint, span, - "an attribute with a similar name exists", - name, - Applicability::MachineApplicable, + lints::RedundantImportVisibility { span: vis_span, help: (), max_vis, import_vis }, ); } + BuiltinLintDiag::UnknownDiagnosticAttribute { span: typo_span, typo_name } => { + let typo = typo_name.map(|typo_name| lints::UnknownDiagnosticAttributeTypoSugg { + span: typo_span, + typo_name, + }); + ctx.emit_span_lint(lint, span, lints::UnknownDiagnosticAttribute { typo }); + } + BuiltinLintDiag::MacroUseDeprecated => { + ctx.emit_span_lint(lint, span, lints::MacroUseDeprecated) + } + BuiltinLintDiag::UnusedMacroUse => ctx.emit_span_lint(lint, span, lints::UnusedMacroUse), + BuiltinLintDiag::PrivateExternCrateReexport(ident) => { + ctx.emit_span_lint(lint, span, lints::PrivateExternCrateReexport { ident }) + } + BuiltinLintDiag::UnusedLabel => ctx.emit_span_lint(lint, span, lints::UnusedLabel), + BuiltinLintDiag::MacroIsPrivate(ident) => { + ctx.emit_span_lint(lint, span, lints::MacroIsPrivate { ident }) + } + BuiltinLintDiag::UnusedMacroDefinition(name) => { + ctx.emit_span_lint(lint, span, lints::UnusedMacroDefinition { name }) + } + BuiltinLintDiag::MacroRuleNeverUsed(n, name) => { + ctx.emit_span_lint(lint, span, lints::MacroRuleNeverUsed { n: n + 1, name }) + } + BuiltinLintDiag::UnstableFeature(msg) => { + ctx.emit_span_lint(lint, span, lints::UnstableFeature { msg }) + } + BuiltinLintDiag::AvoidUsingIntelSyntax => { + ctx.emit_span_lint(lint, span, lints::AvoidIntelSyntax) + } + BuiltinLintDiag::AvoidUsingAttSyntax => { + ctx.emit_span_lint(lint, span, lints::AvoidAttSyntax) + } + BuiltinLintDiag::IncompleteInclude => { + ctx.emit_span_lint(lint, span, lints::IncompleteInclude) + } + BuiltinLintDiag::UnnameableTestItems => { + ctx.emit_span_lint(lint, span, lints::UnnameableTestItems) + } + BuiltinLintDiag::DuplicateMacroAttribute => { + ctx.emit_span_lint(lint, span, lints::DuplicateMacroAttribute) + } + BuiltinLintDiag::CfgAttrNoAttributes => { + ctx.emit_span_lint(lint, span, lints::CfgAttrNoAttributes) + } + BuiltinLintDiag::CrateTypeInCfgAttr => { + ctx.emit_span_lint(lint, span, lints::CrateTypeInCfgAttr) + } + BuiltinLintDiag::CrateNameInCfgAttr => { + ctx.emit_span_lint(lint, span, lints::CrateNameInCfgAttr) + } + BuiltinLintDiag::MissingFragmentSpecifier => { + ctx.emit_span_lint(lint, span, lints::MissingFragmentSpecifier) + } + BuiltinLintDiag::MetaVariableStillRepeating(name) => { + ctx.emit_span_lint(lint, span, lints::MetaVariableStillRepeating { name }) + } + BuiltinLintDiag::MetaVariableWrongOperator => { + ctx.emit_span_lint(lint, span, lints::MetaVariableWrongOperator) + } + BuiltinLintDiag::DuplicateMatcherBinding => { + ctx.emit_span_lint(lint, span, lints::DuplicateMatcherBinding) + } + BuiltinLintDiag::UnknownMacroVariable(name) => { + ctx.emit_span_lint(lint, span, lints::UnknownMacroVariable { name }) + } + BuiltinLintDiag::UnusedCrateDependency { extern_crate, local_crate } => ctx.emit_span_lint( + lint, + span, + lints::UnusedCrateDependency { extern_crate, local_crate }, + ), + BuiltinLintDiag::WasmCAbi => ctx.emit_span_lint(lint, span, lints::WasmCAbi), + BuiltinLintDiag::IllFormedAttributeInput { suggestions } => ctx.emit_span_lint( + lint, + span, + lints::IllFormedAttributeInput { + num_suggestions: suggestions.len(), + suggestions: DiagArgValue::StrListSepByAnd( + suggestions.into_iter().map(|s| format!("`{s}`").into()).collect(), + ), + }, + ), + BuiltinLintDiag::InnerAttributeUnstable { is_macro } => ctx.emit_span_lint( + lint, + span, + if is_macro { + lints::InnerAttributeUnstable::InnerMacroAttribute + } else { + lints::InnerAttributeUnstable::CustomInnerAttribute + }, + ), } } diff --git a/compiler/rustc_lint/src/context/diagnostics/check_cfg.rs b/compiler/rustc_lint/src/context/diagnostics/check_cfg.rs index 3fa04ab75f8..020ca1753cf 100644 --- a/compiler/rustc_lint/src/context/diagnostics/check_cfg.rs +++ b/compiler/rustc_lint/src/context/diagnostics/check_cfg.rs @@ -1,44 +1,27 @@ -use rustc_errors::{Applicability, Diag}; use rustc_middle::bug; use rustc_session::{config::ExpectedValues, Session}; use rustc_span::edit_distance::find_best_match_for_name; use rustc_span::{sym, Span, Symbol}; +use crate::lints; + const MAX_CHECK_CFG_NAMES_OR_VALUES: usize = 35; -fn check_cfg_expected_note( +fn sort_and_truncate_possibilities( sess: &Session, - possibilities: &[Symbol], - type_: &str, - name: Option<Symbol>, - suffix: &str, -) -> String { - use std::fmt::Write; - + mut possibilities: Vec<Symbol>, +) -> (Vec<Symbol>, usize) { let n_possibilities = if sess.opts.unstable_opts.check_cfg_all_expected { possibilities.len() } else { std::cmp::min(possibilities.len(), MAX_CHECK_CFG_NAMES_OR_VALUES) }; - let mut possibilities = possibilities.iter().map(Symbol::as_str).collect::<Vec<_>>(); - possibilities.sort(); + possibilities.sort_by(|s1, s2| s1.as_str().cmp(s2.as_str())); let and_more = possibilities.len().saturating_sub(n_possibilities); - let possibilities = possibilities[..n_possibilities].join("`, `"); - - let mut note = String::with_capacity(50 + possibilities.len()); - - write!(&mut note, "expected {type_}").unwrap(); - if let Some(name) = name { - write!(&mut note, " for `{name}`").unwrap(); - } - write!(&mut note, " are: {suffix}`{possibilities}`").unwrap(); - if and_more > 0 { - write!(&mut note, " and {and_more} more").unwrap(); - } - - note + possibilities.truncate(n_possibilities); + (possibilities, and_more) } enum EscapeQuotes { @@ -61,10 +44,9 @@ fn to_check_cfg_arg(name: Symbol, value: Option<Symbol>, quotes: EscapeQuotes) - pub(super) fn unexpected_cfg_name( sess: &Session, - diag: &mut Diag<'_, ()>, (name, name_span): (Symbol, Span), value: Option<(Symbol, Span)>, -) { +) -> lints::UnexpectedCfgName { #[allow(rustc::potential_query_instability)] let possibilities: Vec<Symbol> = sess.psess.check_config.expecteds.keys().copied().collect(); @@ -87,114 +69,122 @@ pub(super) fn unexpected_cfg_name( let is_from_cargo = rustc_session::utils::was_invoked_from_cargo(); let mut is_feature_cfg = name == sym::feature; - if is_feature_cfg && is_from_cargo { - diag.help("consider defining some features in `Cargo.toml`"); + let code_sugg = if is_feature_cfg && is_from_cargo { + lints::unexpected_cfg_name::CodeSuggestion::DefineFeatures // Suggest the most probable if we found one } else if let Some(best_match) = find_best_match_for_name(&possibilities, name, None) { + is_feature_cfg |= best_match == sym::feature; + if let Some(ExpectedValues::Some(best_match_values)) = sess.psess.check_config.expecteds.get(&best_match) { // We will soon sort, so the initial order does not matter. #[allow(rustc::potential_query_instability)] - let mut possibilities = - best_match_values.iter().flatten().map(Symbol::as_str).collect::<Vec<_>>(); - possibilities.sort(); + let mut possibilities = best_match_values.iter().flatten().collect::<Vec<_>>(); + possibilities.sort_by_key(|s| s.as_str()); + + let get_possibilities_sub = || { + if !possibilities.is_empty() { + let possibilities = + possibilities.iter().copied().cloned().collect::<Vec<_>>().into(); + Some(lints::unexpected_cfg_name::ExpectedValues { best_match, possibilities }) + } else { + None + } + }; - let mut should_print_possibilities = true; if let Some((value, value_span)) = value { if best_match_values.contains(&Some(value)) { - diag.span_suggestion( - name_span, - "there is a config with a similar name and value", - best_match, - Applicability::MaybeIncorrect, - ); - should_print_possibilities = false; + lints::unexpected_cfg_name::CodeSuggestion::SimilarNameAndValue { + span: name_span, + code: best_match.to_string(), + } } else if best_match_values.contains(&None) { - diag.span_suggestion( - name_span.to(value_span), - "there is a config with a similar name and no value", - best_match, - Applicability::MaybeIncorrect, - ); - should_print_possibilities = false; + lints::unexpected_cfg_name::CodeSuggestion::SimilarNameNoValue { + span: name_span.to(value_span), + code: best_match.to_string(), + } } else if let Some(first_value) = possibilities.first() { - diag.span_suggestion( - name_span.to(value_span), - "there is a config with a similar name and different values", - format!("{best_match} = \"{first_value}\""), - Applicability::MaybeIncorrect, - ); + lints::unexpected_cfg_name::CodeSuggestion::SimilarNameDifferentValues { + span: name_span.to(value_span), + code: format!("{best_match} = \"{first_value}\""), + expected: get_possibilities_sub(), + } } else { - diag.span_suggestion( - name_span.to(value_span), - "there is a config with a similar name and different values", - best_match, - Applicability::MaybeIncorrect, - ); - }; + lints::unexpected_cfg_name::CodeSuggestion::SimilarNameDifferentValues { + span: name_span.to(value_span), + code: best_match.to_string(), + expected: get_possibilities_sub(), + } + } } else { - diag.span_suggestion( - name_span, - "there is a config with a similar name", - best_match, - Applicability::MaybeIncorrect, - ); - } - - if !possibilities.is_empty() && should_print_possibilities { - let possibilities = possibilities.join("`, `"); - diag.help(format!("expected values for `{best_match}` are: `{possibilities}`")); + lints::unexpected_cfg_name::CodeSuggestion::SimilarName { + span: name_span, + code: best_match.to_string(), + expected: get_possibilities_sub(), + } } } else { - diag.span_suggestion( - name_span, - "there is a config with a similar name", - best_match, - Applicability::MaybeIncorrect, - ); + lints::unexpected_cfg_name::CodeSuggestion::SimilarName { + span: name_span, + code: best_match.to_string(), + expected: None, + } } - - is_feature_cfg |= best_match == sym::feature; } else { - if !names_possibilities.is_empty() && names_possibilities.len() <= 3 { + let similar_values = if !names_possibilities.is_empty() && names_possibilities.len() <= 3 { names_possibilities.sort(); - for cfg_name in names_possibilities.iter() { - diag.span_suggestion( - name_span, - "found config with similar value", - format!("{cfg_name} = \"{name}\""), - Applicability::MaybeIncorrect, - ); - } - } - if !possibilities.is_empty() { - diag.help_once(check_cfg_expected_note(sess, &possibilities, "names", None, "")); + names_possibilities + .iter() + .map(|cfg_name| lints::unexpected_cfg_name::FoundWithSimilarValue { + span: name_span, + code: format!("{cfg_name} = \"{name}\""), + }) + .collect() + } else { + vec![] + }; + let expected_names = if !possibilities.is_empty() { + let (possibilities, and_more) = sort_and_truncate_possibilities(sess, possibilities); + Some(lints::unexpected_cfg_name::ExpectedNames { + possibilities: possibilities.into(), + and_more, + }) + } else { + None + }; + lints::unexpected_cfg_name::CodeSuggestion::SimilarValues { + with_similar_values: similar_values, + expected_names, } - } + }; let inst = |escape_quotes| to_check_cfg_arg(name, value.map(|(v, _s)| v), escape_quotes); - if is_from_cargo { - if !is_feature_cfg { - diag.help(format!("consider using a Cargo feature instead")); - diag.help(format!("or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:\n [lints.rust]\n unexpected_cfgs = {{ level = \"warn\", check-cfg = ['{}'] }}", inst(EscapeQuotes::No))); - diag.help(format!("or consider adding `println!(\"cargo::rustc-check-cfg={}\");` to the top of the `build.rs`", inst(EscapeQuotes::Yes))); - } - diag.note("see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration"); + let invocation_help = if is_from_cargo { + let sub = if !is_feature_cfg { + Some(lints::UnexpectedCfgCargoHelp::new( + &inst(EscapeQuotes::No), + &inst(EscapeQuotes::Yes), + )) + } else { + None + }; + lints::unexpected_cfg_name::InvocationHelp::Cargo { sub } } else { - let inst = inst(EscapeQuotes::No); - diag.help(format!("to expect this configuration use `--check-cfg={inst}`",)); - diag.note("see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration"); - } + lints::unexpected_cfg_name::InvocationHelp::Rustc(lints::UnexpectedCfgRustcHelp::new( + &inst(EscapeQuotes::No), + )) + }; + + lints::UnexpectedCfgName { code_sugg, invocation_help, name } } pub(super) fn unexpected_cfg_value( sess: &Session, - diag: &mut Diag<'_, ()>, (name, name_span): (Symbol, Span), value: Option<(Symbol, Span)>, -) { +) -> lints::UnexpectedCfgValue { let Some(ExpectedValues::Some(values)) = &sess.psess.check_config.expecteds.get(&name) else { bug!( "it shouldn't be possible to have a diagnostic on a value whose name is not in values" @@ -214,53 +204,53 @@ pub(super) fn unexpected_cfg_value( // Show the full list if all possible values for a given name, but don't do it // for names as the possibilities could be very long - if !possibilities.is_empty() { - diag.note(check_cfg_expected_note( - sess, - &possibilities, - "values", - Some(name), - if have_none_possibility { "(none), " } else { "" }, - )); + let code_sugg = if !possibilities.is_empty() { + let expected_values = { + let (possibilities, and_more) = + sort_and_truncate_possibilities(sess, possibilities.clone()); + lints::unexpected_cfg_value::ExpectedValues { + name, + have_none_possibility, + possibilities: possibilities.into(), + and_more, + } + }; - if let Some((value, value_span)) = value { + let suggestion = if let Some((value, value_span)) = value { // Suggest the most probable if we found one if let Some(best_match) = find_best_match_for_name(&possibilities, value, None) { - diag.span_suggestion( - value_span, - "there is a expected value with a similar name", - format!("\"{best_match}\""), - Applicability::MaybeIncorrect, - ); + Some(lints::unexpected_cfg_value::ChangeValueSuggestion::SimilarName { + span: value_span, + best_match, + }) + } else { + None } } else if let &[first_possibility] = &possibilities[..] { - diag.span_suggestion( - name_span.shrink_to_hi(), - "specify a config value", - format!(" = \"{first_possibility}\""), - Applicability::MaybeIncorrect, - ); - } + Some(lints::unexpected_cfg_value::ChangeValueSuggestion::SpecifyValue { + span: name_span.shrink_to_hi(), + first_possibility, + }) + } else { + None + }; + + lints::unexpected_cfg_value::CodeSuggestion::ChangeValue { expected_values, suggestion } } else if have_none_possibility { - diag.note(format!("no expected value for `{name}`")); - if let Some((_value, value_span)) = value { - diag.span_suggestion( - name_span.shrink_to_hi().to(value_span), - "remove the value", - "", - Applicability::MaybeIncorrect, - ); - } + let suggestion = + value.map(|(_value, value_span)| lints::unexpected_cfg_value::RemoveValueSuggestion { + span: name_span.shrink_to_hi().to(value_span), + }); + lints::unexpected_cfg_value::CodeSuggestion::RemoveValue { suggestion, name } } else { - diag.note(format!("no expected values for `{name}`")); - - let sp = if let Some((_value, value_span)) = value { + let span = if let Some((_value, value_span)) = value { name_span.to(value_span) } else { name_span }; - diag.span_suggestion(sp, "remove the condition", "", Applicability::MaybeIncorrect); - } + let suggestion = lints::unexpected_cfg_value::RemoveConditionSuggestion { span }; + lints::unexpected_cfg_value::CodeSuggestion::RemoveCondition { suggestion, name } + }; // We don't want to suggest adding values to well known names // since those are defined by rustc it-self. Users can still @@ -269,24 +259,35 @@ pub(super) fn unexpected_cfg_value( let inst = |escape_quotes| to_check_cfg_arg(name, value.map(|(v, _s)| v), escape_quotes); - if is_from_cargo { - if name == sym::feature { + let invocation_help = if is_from_cargo { + let help = if name == sym::feature { if let Some((value, _value_span)) = value { - diag.help(format!("consider adding `{value}` as a feature in `Cargo.toml`")); + Some(lints::unexpected_cfg_value::CargoHelp::AddFeature { value }) } else { - diag.help("consider defining some features in `Cargo.toml`"); + Some(lints::unexpected_cfg_value::CargoHelp::DefineFeatures) } } else if !is_cfg_a_well_know_name { - diag.help(format!("consider using a Cargo feature instead")); - diag.help(format!("or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:\n [lints.rust]\n unexpected_cfgs = {{ level = \"warn\", check-cfg = ['{}'] }}", inst(EscapeQuotes::No))); - diag.help(format!("or consider adding `println!(\"cargo::rustc-check-cfg={}\");` to the top of the `build.rs`", inst(EscapeQuotes::Yes))); - } - diag.note("see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration"); + Some(lints::unexpected_cfg_value::CargoHelp::Other(lints::UnexpectedCfgCargoHelp::new( + &inst(EscapeQuotes::No), + &inst(EscapeQuotes::Yes), + ))) + } else { + None + }; + lints::unexpected_cfg_value::InvocationHelp::Cargo(help) } else { - if !is_cfg_a_well_know_name { - let inst = inst(EscapeQuotes::No); - diag.help(format!("to expect this configuration use `--check-cfg={inst}`",)); - } - diag.note("see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration"); + let help = if !is_cfg_a_well_know_name { + Some(lints::UnexpectedCfgRustcHelp::new(&inst(EscapeQuotes::No))) + } else { + None + }; + lints::unexpected_cfg_value::InvocationHelp::Rustc(help) + }; + + lints::UnexpectedCfgValue { + code_sugg, + invocation_help, + has_value: value.is_some(), + value: value.map_or_else(String::new, |(v, _span)| v.to_string()), } } diff --git a/compiler/rustc_lint/src/early.rs b/compiler/rustc_lint/src/early.rs index 3f627baf770..736c7a11069 100644 --- a/compiler/rustc_lint/src/early.rs +++ b/compiler/rustc_lint/src/early.rs @@ -14,7 +14,7 @@ //! upon. As the ast is traversed, this keeps track of the current lint level //! for all lint attributes. -use crate::context::{EarlyContext, LintContext, LintStore}; +use crate::context::{EarlyContext, LintStore}; use crate::passes::{EarlyLintPass, EarlyLintPassObject}; use rustc_ast::ptr::P; use rustc_ast::visit::{self as ast_visit, walk_list, Visitor}; @@ -44,14 +44,8 @@ impl<'a, T: EarlyLintPass> EarlyContextAndPass<'a, T> { #[allow(rustc::diagnostic_outside_of_impl)] fn inlined_check_id(&mut self, id: ast::NodeId) { for early_lint in self.context.buffered.take(id) { - let BufferedEarlyLint { span, msg, node_id: _, lint_id, diagnostic } = early_lint; - self.context.span_lint_with_diagnostics( - lint_id.lint, - Some(span), - msg, - |_| {}, - diagnostic, - ); + let BufferedEarlyLint { span, node_id: _, lint_id, diagnostic } = early_lint; + self.context.span_lint_with_diagnostics(lint_id.lint, span, diagnostic); } } diff --git a/compiler/rustc_lint/src/lib.rs b/compiler/rustc_lint/src/lib.rs index d93edadcfbc..64fcc7e46e0 100644 --- a/compiler/rustc_lint/src/lib.rs +++ b/compiler/rustc_lint/src/lib.rs @@ -42,7 +42,6 @@ #[macro_use] extern crate tracing; -mod array_into_iter; mod async_fn_in_trait; pub mod builtin; mod context; @@ -76,18 +75,18 @@ mod passes; mod ptr_nulls; mod redundant_semicolon; mod reference_casting; +mod shadowed_into_iter; mod traits; mod types; mod unit_bindings; mod unused; -pub use array_into_iter::ARRAY_INTO_ITER; +pub use shadowed_into_iter::{ARRAY_INTO_ITER, BOXED_SLICE_INTO_ITER}; use rustc_hir::def_id::LocalModDefId; use rustc_middle::query::Providers; use rustc_middle::ty::TyCtxt; -use array_into_iter::ArrayIntoIter; use async_fn_in_trait::AsyncFnInTrait; use builtin::*; use deref_into_dyn_supertrait::*; @@ -112,6 +111,7 @@ use pass_by_value::*; use ptr_nulls::*; use redundant_semicolon::*; use reference_casting::*; +use shadowed_into_iter::ShadowedIntoIter; use traits::*; use types::*; use unit_bindings::*; @@ -215,7 +215,7 @@ late_lint_methods!( DerefNullPtr: DerefNullPtr, UnstableFeatures: UnstableFeatures, UngatedAsyncFnTrackCaller: UngatedAsyncFnTrackCaller, - ArrayIntoIter: ArrayIntoIter::default(), + ShadowedIntoIter: ShadowedIntoIter, DropTraitConstraints: DropTraitConstraints, TemporaryCStringAsPtr: TemporaryCStringAsPtr, NonPanicFmt: NonPanicFmt, diff --git a/compiler/rustc_lint/src/lints.rs b/compiler/rustc_lint/src/lints.rs index 7efa5245baa..3bd6faca379 100644 --- a/compiler/rustc_lint/src/lints.rs +++ b/compiler/rustc_lint/src/lints.rs @@ -5,16 +5,22 @@ use std::num::NonZero; use crate::errors::RequestedLevel; use crate::fluent_generated as fluent; use rustc_errors::{ - codes::*, Applicability, Diag, DiagMessage, DiagStyledString, EmissionGuarantee, - LintDiagnostic, SubdiagMessageOp, Subdiagnostic, SuggestionStyle, + codes::*, Applicability, Diag, DiagArgValue, DiagMessage, DiagStyledString, + ElidedLifetimeInPathSubdiag, EmissionGuarantee, LintDiagnostic, SubdiagMessageOp, + Subdiagnostic, SuggestionStyle, }; -use rustc_hir::def_id::DefId; +use rustc_hir::{def::Namespace, def_id::DefId}; use rustc_macros::{LintDiagnostic, Subdiagnostic}; use rustc_middle::ty::{ inhabitedness::InhabitedPredicate, Clause, PolyExistentialTraitRef, Ty, TyCtxt, }; -use rustc_session::Session; -use rustc_span::{edition::Edition, sym, symbol::Ident, Span, Symbol}; +use rustc_session::{lint::AmbiguityErrorDiag, Session}; +use rustc_span::{ + edition::Edition, + sym, + symbol::{Ident, MacroRulesNormalizedIdent}, + Span, Symbol, +}; use crate::{ builtin::InitError, builtin::TypeAliasBounds, errors::OverruledAttributeSub, LateContext, @@ -22,17 +28,18 @@ use crate::{ // array_into_iter.rs #[derive(LintDiagnostic)] -#[diag(lint_array_into_iter)] -pub struct ArrayIntoIterDiag<'a> { - pub target: &'a str, +#[diag(lint_shadowed_into_iter)] +pub struct ShadowedIntoIterDiag { + pub target: &'static str, + pub edition: &'static str, #[suggestion(lint_use_iter_suggestion, code = "iter", applicability = "machine-applicable")] pub suggestion: Span, #[subdiagnostic] - pub sub: Option<ArrayIntoIterDiagSub>, + pub sub: Option<ShadowedIntoIterDiagSub>, } #[derive(Subdiagnostic)] -pub enum ArrayIntoIterDiagSub { +pub enum ShadowedIntoIterDiagSub { #[suggestion(lint_remove_into_iter_suggestion, code = "", applicability = "maybe-incorrect")] RemoveIntoIter { #[primary_span] @@ -1946,3 +1953,837 @@ pub struct UnitBindingsDiag { #[label] pub label: Span, } + +#[derive(LintDiagnostic)] +#[diag(lint_builtin_asm_labels)] +#[help] +#[note] +pub struct BuiltinNamedAsmLabel; + +#[derive(Subdiagnostic)] +#[help(lint_unexpected_cfg_add_cargo_feature)] +#[help(lint_unexpected_cfg_add_cargo_toml_lint_cfg)] +#[help(lint_unexpected_cfg_add_build_rs_println)] +pub struct UnexpectedCfgCargoHelp { + pub build_rs_println: String, + pub cargo_toml_lint_cfg: String, +} + +impl UnexpectedCfgCargoHelp { + pub fn new(unescaped: &str, escaped: &str) -> Self { + Self { + cargo_toml_lint_cfg: format!( + "\n [lints.rust]\n unexpected_cfgs = {{ level = \"warn\", check-cfg = ['{unescaped}'] }}", + ), + build_rs_println: format!("println!(\"cargo::rustc-check-cfg={escaped}\");",), + } + } +} + +#[derive(Subdiagnostic)] +#[help(lint_unexpected_cfg_add_cmdline_arg)] +pub struct UnexpectedCfgRustcHelp { + pub cmdline_arg: String, +} + +impl UnexpectedCfgRustcHelp { + pub fn new(unescaped: &str) -> Self { + Self { cmdline_arg: format!("--check-cfg={unescaped}") } + } +} + +#[derive(LintDiagnostic)] +#[diag(lint_unexpected_cfg_name)] +pub struct UnexpectedCfgName { + #[subdiagnostic] + pub code_sugg: unexpected_cfg_name::CodeSuggestion, + #[subdiagnostic] + pub invocation_help: unexpected_cfg_name::InvocationHelp, + + pub name: Symbol, +} + +pub mod unexpected_cfg_name { + use rustc_errors::DiagSymbolList; + use rustc_macros::Subdiagnostic; + use rustc_span::{Span, Symbol}; + + #[derive(Subdiagnostic)] + pub enum CodeSuggestion { + #[help(lint_unexpected_cfg_define_features)] + DefineFeatures, + #[suggestion( + lint_unexpected_cfg_name_similar_name_value, + applicability = "maybe-incorrect", + code = "{code}" + )] + SimilarNameAndValue { + #[primary_span] + span: Span, + code: String, + }, + #[suggestion( + lint_unexpected_cfg_name_similar_name_no_value, + applicability = "maybe-incorrect", + code = "{code}" + )] + SimilarNameNoValue { + #[primary_span] + span: Span, + code: String, + }, + #[suggestion( + lint_unexpected_cfg_name_similar_name_different_values, + applicability = "maybe-incorrect", + code = "{code}" + )] + SimilarNameDifferentValues { + #[primary_span] + span: Span, + code: String, + #[subdiagnostic] + expected: Option<ExpectedValues>, + }, + #[suggestion( + lint_unexpected_cfg_name_similar_name, + applicability = "maybe-incorrect", + code = "{code}" + )] + SimilarName { + #[primary_span] + span: Span, + code: String, + #[subdiagnostic] + expected: Option<ExpectedValues>, + }, + SimilarValues { + #[subdiagnostic] + with_similar_values: Vec<FoundWithSimilarValue>, + #[subdiagnostic] + expected_names: Option<ExpectedNames>, + }, + } + + #[derive(Subdiagnostic)] + #[help(lint_unexpected_cfg_name_expected_values)] + pub struct ExpectedValues { + pub best_match: Symbol, + pub possibilities: DiagSymbolList, + } + + #[derive(Subdiagnostic)] + #[suggestion( + lint_unexpected_cfg_name_with_similar_value, + applicability = "maybe-incorrect", + code = "{code}" + )] + pub struct FoundWithSimilarValue { + #[primary_span] + pub span: Span, + pub code: String, + } + + #[derive(Subdiagnostic)] + #[help_once(lint_unexpected_cfg_name_expected_names)] + pub struct ExpectedNames { + pub possibilities: DiagSymbolList, + pub and_more: usize, + } + + #[derive(Subdiagnostic)] + pub enum InvocationHelp { + #[note(lint_unexpected_cfg_doc_cargo)] + Cargo { + #[subdiagnostic] + sub: Option<super::UnexpectedCfgCargoHelp>, + }, + #[note(lint_unexpected_cfg_doc_rustc)] + Rustc(#[subdiagnostic] super::UnexpectedCfgRustcHelp), + } +} + +#[derive(LintDiagnostic)] +#[diag(lint_unexpected_cfg_value)] +pub struct UnexpectedCfgValue { + #[subdiagnostic] + pub code_sugg: unexpected_cfg_value::CodeSuggestion, + #[subdiagnostic] + pub invocation_help: unexpected_cfg_value::InvocationHelp, + + pub has_value: bool, + pub value: String, +} + +pub mod unexpected_cfg_value { + use rustc_errors::DiagSymbolList; + use rustc_macros::Subdiagnostic; + use rustc_span::{Span, Symbol}; + + #[derive(Subdiagnostic)] + pub enum CodeSuggestion { + ChangeValue { + #[subdiagnostic] + expected_values: ExpectedValues, + #[subdiagnostic] + suggestion: Option<ChangeValueSuggestion>, + }, + #[note(lint_unexpected_cfg_value_no_expected_value)] + RemoveValue { + #[subdiagnostic] + suggestion: Option<RemoveValueSuggestion>, + + name: Symbol, + }, + #[note(lint_unexpected_cfg_value_no_expected_values)] + RemoveCondition { + #[subdiagnostic] + suggestion: RemoveConditionSuggestion, + + name: Symbol, + }, + } + + #[derive(Subdiagnostic)] + pub enum ChangeValueSuggestion { + #[suggestion( + lint_unexpected_cfg_value_similar_name, + code = r#""{best_match}""#, + applicability = "maybe-incorrect" + )] + SimilarName { + #[primary_span] + span: Span, + best_match: Symbol, + }, + #[suggestion( + lint_unexpected_cfg_value_specify_value, + code = r#" = "{first_possibility}""#, + applicability = "maybe-incorrect" + )] + SpecifyValue { + #[primary_span] + span: Span, + first_possibility: Symbol, + }, + } + + #[derive(Subdiagnostic)] + #[suggestion( + lint_unexpected_cfg_value_remove_value, + code = "", + applicability = "maybe-incorrect" + )] + pub struct RemoveValueSuggestion { + #[primary_span] + pub span: Span, + } + + #[derive(Subdiagnostic)] + #[suggestion( + lint_unexpected_cfg_value_remove_condition, + code = "", + applicability = "maybe-incorrect" + )] + pub struct RemoveConditionSuggestion { + #[primary_span] + pub span: Span, + } + + #[derive(Subdiagnostic)] + #[note(lint_unexpected_cfg_value_expected_values)] + pub struct ExpectedValues { + pub name: Symbol, + pub have_none_possibility: bool, + pub possibilities: DiagSymbolList, + pub and_more: usize, + } + + #[derive(Subdiagnostic)] + pub enum InvocationHelp { + #[note(lint_unexpected_cfg_doc_cargo)] + Cargo(#[subdiagnostic] Option<CargoHelp>), + #[note(lint_unexpected_cfg_doc_rustc)] + Rustc(#[subdiagnostic] Option<super::UnexpectedCfgRustcHelp>), + } + + #[derive(Subdiagnostic)] + pub enum CargoHelp { + #[help(lint_unexpected_cfg_value_add_feature)] + AddFeature { + value: Symbol, + }, + #[help(lint_unexpected_cfg_define_features)] + DefineFeatures, + Other(#[subdiagnostic] super::UnexpectedCfgCargoHelp), + } +} + +#[derive(LintDiagnostic)] +#[diag(lint_macro_use_deprecated)] +pub struct MacroUseDeprecated; + +#[derive(LintDiagnostic)] +#[diag(lint_unused_macro_use)] +pub struct UnusedMacroUse; + +#[derive(LintDiagnostic)] +#[diag(lint_private_extern_crate_reexport)] +pub struct PrivateExternCrateReexport { + pub ident: Ident, +} + +#[derive(LintDiagnostic)] +#[diag(lint_unused_label)] +pub struct UnusedLabel; + +#[derive(LintDiagnostic)] +#[diag(lint_macro_is_private)] +pub struct MacroIsPrivate { + pub ident: Ident, +} + +#[derive(LintDiagnostic)] +#[diag(lint_unused_macro_definition)] +pub struct UnusedMacroDefinition { + pub name: Symbol, +} + +#[derive(LintDiagnostic)] +#[diag(lint_macro_rule_never_used)] +pub struct MacroRuleNeverUsed { + pub n: usize, + pub name: Symbol, +} + +pub struct UnstableFeature { + pub msg: DiagMessage, +} + +impl<'a> LintDiagnostic<'a, ()> for UnstableFeature { + fn decorate_lint<'b>(self, _diag: &'b mut Diag<'a, ()>) {} + + fn msg(&self) -> DiagMessage { + self.msg.clone() + } +} + +#[derive(LintDiagnostic)] +#[diag(lint_avoid_intel_syntax)] +pub struct AvoidIntelSyntax; + +#[derive(LintDiagnostic)] +#[diag(lint_avoid_att_syntax)] +pub struct AvoidAttSyntax; + +#[derive(LintDiagnostic)] +#[diag(lint_incomplete_include)] +pub struct IncompleteInclude; + +#[derive(LintDiagnostic)] +#[diag(lint_unnameable_test_items)] +pub struct UnnameableTestItems; + +#[derive(LintDiagnostic)] +#[diag(lint_duplicate_macro_attribute)] +pub struct DuplicateMacroAttribute; + +#[derive(LintDiagnostic)] +#[diag(lint_cfg_attr_no_attributes)] +pub struct CfgAttrNoAttributes; + +#[derive(LintDiagnostic)] +#[diag(lint_crate_type_in_cfg_attr_deprecated)] +pub struct CrateTypeInCfgAttr; + +#[derive(LintDiagnostic)] +#[diag(lint_crate_name_in_cfg_attr_deprecated)] +pub struct CrateNameInCfgAttr; + +#[derive(LintDiagnostic)] +#[diag(lint_missing_fragment_specifier)] +pub struct MissingFragmentSpecifier; + +#[derive(LintDiagnostic)] +#[diag(lint_metavariable_still_repeating)] +pub struct MetaVariableStillRepeating { + pub name: MacroRulesNormalizedIdent, +} + +#[derive(LintDiagnostic)] +#[diag(lint_metavariable_wrong_operator)] +pub struct MetaVariableWrongOperator; + +#[derive(LintDiagnostic)] +#[diag(lint_duplicate_matcher_binding)] +pub struct DuplicateMatcherBinding; + +#[derive(LintDiagnostic)] +#[diag(lint_unknown_macro_variable)] +pub struct UnknownMacroVariable { + pub name: MacroRulesNormalizedIdent, +} + +#[derive(LintDiagnostic)] +#[diag(lint_unused_crate_dependency)] +pub struct UnusedCrateDependency { + pub extern_crate: Symbol, + pub local_crate: Symbol, +} + +#[derive(LintDiagnostic)] +#[diag(lint_wasm_c_abi)] +pub struct WasmCAbi; + +#[derive(LintDiagnostic)] +#[diag(lint_ill_formed_attribute_input)] +pub struct IllFormedAttributeInput { + pub num_suggestions: usize, + pub suggestions: DiagArgValue, +} + +#[derive(LintDiagnostic)] +pub enum InnerAttributeUnstable { + #[diag(lint_inner_macro_attribute_unstable)] + InnerMacroAttribute, + #[diag(lint_custom_inner_attribute_unstable)] + CustomInnerAttribute, +} + +#[derive(LintDiagnostic)] +#[diag(lint_unknown_diagnostic_attribute)] +pub struct UnknownDiagnosticAttribute { + #[subdiagnostic] + pub typo: Option<UnknownDiagnosticAttributeTypoSugg>, +} + +#[derive(Subdiagnostic)] +#[suggestion( + lint_unknown_diagnostic_attribute_typo_sugg, + style = "verbose", + code = "{typo_name}", + applicability = "machine-applicable" +)] +pub struct UnknownDiagnosticAttributeTypoSugg { + #[primary_span] + pub span: Span, + pub typo_name: Symbol, +} + +#[derive(LintDiagnostic)] +#[diag(lint_unicode_text_flow)] +#[note] +pub struct UnicodeTextFlow { + #[label] + pub comment_span: Span, + #[subdiagnostic] + pub characters: Vec<UnicodeCharNoteSub>, + #[subdiagnostic] + pub suggestions: Option<UnicodeTextFlowSuggestion>, + + pub num_codepoints: usize, +} + +#[derive(Subdiagnostic)] +#[label(lint_label_comment_char)] +pub struct UnicodeCharNoteSub { + #[primary_span] + pub span: Span, + pub c_debug: String, +} + +#[derive(Subdiagnostic)] +#[multipart_suggestion(lint_suggestion, applicability = "machine-applicable", style = "hidden")] +pub struct UnicodeTextFlowSuggestion { + #[suggestion_part(code = "")] + pub spans: Vec<Span>, +} + +#[derive(LintDiagnostic)] +#[diag(lint_abs_path_with_module)] +pub struct AbsPathWithModule { + #[subdiagnostic] + pub sugg: AbsPathWithModuleSugg, +} + +#[derive(Subdiagnostic)] +#[suggestion(lint_suggestion, code = "{replacement}")] +pub struct AbsPathWithModuleSugg { + #[primary_span] + pub span: Span, + #[applicability] + pub applicability: Applicability, + pub replacement: String, +} + +#[derive(LintDiagnostic)] +#[diag(lint_proc_macro_derive_resolution_fallback)] +pub struct ProcMacroDeriveResolutionFallback { + #[label] + pub span: Span, + pub ns: Namespace, + pub ident: Ident, +} + +#[derive(LintDiagnostic)] +#[diag(lint_macro_expanded_macro_exports_accessed_by_absolute_paths)] +pub struct MacroExpandedMacroExportsAccessedByAbsolutePaths { + #[note] + pub definition: Span, +} + +#[derive(LintDiagnostic)] +#[diag(lint_hidden_lifetime_parameters)] +pub struct ElidedLifetimesInPaths { + #[subdiagnostic] + pub subdiag: ElidedLifetimeInPathSubdiag, +} + +#[derive(LintDiagnostic)] +#[diag(lint_invalid_crate_type_value)] +pub struct UnknownCrateTypes { + #[subdiagnostic] + pub sugg: Option<UnknownCrateTypesSub>, +} + +#[derive(Subdiagnostic)] +#[suggestion(lint_suggestion, code = r#""{candidate}""#, applicability = "maybe-incorrect")] +pub struct UnknownCrateTypesSub { + #[primary_span] + pub span: Span, + pub candidate: Symbol, +} + +#[derive(LintDiagnostic)] +#[diag(lint_unused_imports)] +pub struct UnusedImports { + #[subdiagnostic] + pub sugg: UnusedImportsSugg, + #[help] + pub test_module_span: Option<Span>, + + pub span_snippets: DiagArgValue, + pub num_snippets: usize, +} + +#[derive(Subdiagnostic)] +pub enum UnusedImportsSugg { + #[suggestion( + lint_suggestion_remove_whole_use, + applicability = "machine-applicable", + code = "", + style = "tool-only" + )] + RemoveWholeUse { + #[primary_span] + span: Span, + }, + #[multipart_suggestion( + lint_suggestion_remove_imports, + applicability = "machine-applicable", + style = "tool-only" + )] + RemoveImports { + #[suggestion_part(code = "")] + remove_spans: Vec<Span>, + num_to_remove: usize, + }, +} + +#[derive(LintDiagnostic)] +#[diag(lint_redundant_import)] +pub struct RedundantImport { + #[subdiagnostic] + pub subs: Vec<RedundantImportSub>, + + pub ident: Ident, +} + +#[derive(Subdiagnostic)] +pub enum RedundantImportSub { + #[label(lint_label_imported_here)] + ImportedHere(#[primary_span] Span), + #[label(lint_label_defined_here)] + DefinedHere(#[primary_span] Span), + #[label(lint_label_imported_prelude)] + ImportedPrelude(#[primary_span] Span), + #[label(lint_label_defined_prelude)] + DefinedPrelude(#[primary_span] Span), +} + +#[derive(LintDiagnostic)] +#[diag(lint_unused_doc_comment)] +#[help] +pub struct UnusedDocComment { + #[label] + pub span: Span, +} + +#[derive(LintDiagnostic)] +pub enum PatternsInFnsWithoutBody { + #[diag(lint_pattern_in_foreign)] + Foreign { + #[subdiagnostic] + sub: PatternsInFnsWithoutBodySub, + }, + #[diag(lint_pattern_in_bodiless)] + Bodiless { + #[subdiagnostic] + sub: PatternsInFnsWithoutBodySub, + }, +} + +#[derive(Subdiagnostic)] +#[suggestion(lint_remove_mut_from_pattern, code = "{ident}", applicability = "machine-applicable")] +pub struct PatternsInFnsWithoutBodySub { + #[primary_span] + pub span: Span, + + pub ident: Ident, +} + +#[derive(LintDiagnostic)] +#[diag(lint_extern_without_abi)] +#[help] +pub struct MissingAbi { + #[label] + pub span: Span, + + pub default_abi: &'static str, +} + +#[derive(LintDiagnostic)] +#[diag(lint_legacy_derive_helpers)] +pub struct LegacyDeriveHelpers { + #[label] + pub span: Span, +} + +#[derive(LintDiagnostic)] +#[diag(lint_proc_macro_back_compat)] +#[note] +pub struct ProcMacroBackCompat { + pub crate_name: String, + pub fixed_version: String, +} + +#[derive(LintDiagnostic)] +#[diag(lint_or_patterns_back_compat)] +pub struct OrPatternsBackCompat { + #[suggestion(code = "{suggestion}", applicability = "machine-applicable")] + pub span: Span, + pub suggestion: String, +} + +#[derive(LintDiagnostic)] +#[diag(lint_reserved_prefix)] +pub struct ReservedPrefix { + #[label] + pub label: Span, + #[suggestion(code = " ", applicability = "machine-applicable")] + pub suggestion: Span, + + pub prefix: String, +} + +#[derive(LintDiagnostic)] +#[diag(lint_unused_builtin_attribute)] +pub struct UnusedBuiltinAttribute { + #[note] + pub invoc_span: Span, + + pub attr_name: Symbol, + pub macro_name: String, +} + +#[derive(LintDiagnostic)] +#[diag(lint_trailing_semi_macro)] +pub struct TrailingMacro { + #[note(lint_note1)] + #[note(lint_note2)] + pub is_trailing: bool, + + pub name: Ident, +} + +#[derive(LintDiagnostic)] +#[diag(lint_break_with_label_and_loop)] +pub struct BreakWithLabelAndLoop { + #[subdiagnostic] + pub sub: BreakWithLabelAndLoopSub, +} + +#[derive(Subdiagnostic)] +#[multipart_suggestion(lint_suggestion, applicability = "machine-applicable")] +pub struct BreakWithLabelAndLoopSub { + #[suggestion_part(code = "(")] + pub left: Span, + #[suggestion_part(code = ")")] + pub right: Span, +} + +#[derive(LintDiagnostic)] +#[diag(lint_deprecated_where_clause_location)] +#[note] +pub struct DeprecatedWhereClauseLocation { + #[subdiagnostic] + pub suggestion: DeprecatedWhereClauseLocationSugg, +} + +#[derive(Subdiagnostic)] +pub enum DeprecatedWhereClauseLocationSugg { + #[multipart_suggestion(lint_suggestion_move_to_end, applicability = "machine-applicable")] + MoveToEnd { + #[suggestion_part(code = "")] + left: Span, + #[suggestion_part(code = "{sugg}")] + right: Span, + + sugg: String, + }, + #[suggestion(lint_suggestion_remove_where, code = "", applicability = "machine-applicable")] + RemoveWhere { + #[primary_span] + span: Span, + }, +} + +#[derive(LintDiagnostic)] +#[diag(lint_single_use_lifetime)] +pub struct SingleUseLifetime { + #[label(lint_label_param)] + pub param_span: Span, + #[label(lint_label_use)] + pub use_span: Span, + #[subdiagnostic] + pub suggestion: Option<SingleUseLifetimeSugg>, + + pub ident: Ident, +} + +#[derive(Subdiagnostic)] +#[multipart_suggestion(lint_suggestion, applicability = "machine-applicable")] +pub struct SingleUseLifetimeSugg { + #[suggestion_part(code = "")] + pub deletion_span: Option<Span>, + #[suggestion_part(code = "{replace_lt}")] + pub use_span: Span, + + pub replace_lt: String, +} + +#[derive(LintDiagnostic)] +#[diag(lint_unused_lifetime)] +pub struct UnusedLifetime { + #[suggestion(code = "", applicability = "machine-applicable")] + pub deletion_span: Option<Span>, + + pub ident: Ident, +} + +#[derive(LintDiagnostic)] +#[diag(lint_named_argument_used_positionally)] +pub struct NamedArgumentUsedPositionally { + #[label(lint_label_named_arg)] + pub named_arg_sp: Span, + #[label(lint_label_position_arg)] + pub position_label_sp: Option<Span>, + #[suggestion(style = "verbose", code = "{name}", applicability = "maybe-incorrect")] + pub suggestion: Option<Span>, + + pub name: String, + pub named_arg_name: String, +} + +#[derive(LintDiagnostic)] +#[diag(lint_byte_slice_in_packed_struct_with_derive)] +#[help] +pub struct ByteSliceInPackedStructWithDerive { + // FIXME: make this translatable + pub ty: String, +} + +#[derive(LintDiagnostic)] +#[diag(lint_unused_extern_crate)] +pub struct UnusedExternCrate { + #[suggestion(code = "", applicability = "machine-applicable")] + pub removal_span: Span, +} + +#[derive(LintDiagnostic)] +#[diag(lint_extern_crate_not_idiomatic)] +pub struct ExternCrateNotIdiomatic { + #[suggestion(style = "verbose", code = "{code}", applicability = "machine-applicable")] + pub span: Span, + + pub code: &'static str, +} + +// FIXME: make this translatable +pub struct AmbiguousGlobImports { + pub ambiguity: AmbiguityErrorDiag, +} + +impl<'a, G: EmissionGuarantee> LintDiagnostic<'a, G> for AmbiguousGlobImports { + fn decorate_lint<'b>(self, diag: &'b mut Diag<'a, G>) { + rustc_errors::report_ambiguity_error(diag, self.ambiguity); + } + + fn msg(&self) -> DiagMessage { + DiagMessage::Str(self.ambiguity.msg.clone().into()) + } +} + +#[derive(LintDiagnostic)] +#[diag(lint_ambiguous_glob_reexport)] +pub struct AmbiguousGlobReexports { + #[label(lint_label_first_reexport)] + pub first_reexport: Span, + #[label(lint_label_duplicate_reexport)] + pub duplicate_reexport: Span, + + pub name: String, + // FIXME: make this translatable + pub namespace: String, +} + +#[derive(LintDiagnostic)] +#[diag(lint_hidden_glob_reexport)] +pub struct HiddenGlobReexports { + #[note(lint_note_glob_reexport)] + pub glob_reexport: Span, + #[note(lint_note_private_item)] + pub private_item: Span, + + pub name: String, + // FIXME: make this translatable + pub namespace: String, +} + +#[derive(LintDiagnostic)] +#[diag(lint_unnecessary_qualification)] +pub struct UnusedQualifications { + #[suggestion(style = "verbose", code = "", applicability = "machine-applicable")] + pub removal_span: Span, +} + +#[derive(LintDiagnostic)] +#[diag(lint_associated_const_elided_lifetime)] +pub struct AssociatedConstElidedLifetime { + #[suggestion(style = "verbose", code = "{code}", applicability = "machine-applicable")] + pub span: Span, + + pub code: &'static str, + pub elided: bool, +} + +#[derive(LintDiagnostic)] +#[diag(lint_redundant_import_visibility)] +pub struct RedundantImportVisibility { + #[note] + pub span: Span, + #[help] + pub help: (), + + pub import_vis: String, + pub max_vis: String, +} diff --git a/compiler/rustc_lint/src/shadowed_into_iter.rs b/compiler/rustc_lint/src/shadowed_into_iter.rs new file mode 100644 index 00000000000..41ec84faa78 --- /dev/null +++ b/compiler/rustc_lint/src/shadowed_into_iter.rs @@ -0,0 +1,157 @@ +use crate::lints::{ShadowedIntoIterDiag, ShadowedIntoIterDiagSub}; +use crate::{LateContext, LateLintPass, LintContext}; +use rustc_hir as hir; +use rustc_middle::ty::{self, Ty}; +use rustc_session::lint::FutureIncompatibilityReason; +use rustc_session::{declare_lint, impl_lint_pass}; +use rustc_span::edition::Edition; + +declare_lint! { + /// The `array_into_iter` lint detects calling `into_iter` on arrays. + /// + /// ### Example + /// + /// ```rust,edition2018 + /// # #![allow(unused)] + /// [1, 2, 3].into_iter().for_each(|n| { *n; }); + /// ``` + /// + /// {{produces}} + /// + /// ### Explanation + /// + /// Since Rust 1.53, arrays implement `IntoIterator`. However, to avoid + /// breakage, `array.into_iter()` in Rust 2015 and 2018 code will still + /// behave as `(&array).into_iter()`, returning an iterator over + /// references, just like in Rust 1.52 and earlier. + /// This only applies to the method call syntax `array.into_iter()`, not to + /// any other syntax such as `for _ in array` or `IntoIterator::into_iter(array)`. + pub ARRAY_INTO_ITER, + Warn, + "detects calling `into_iter` on arrays in Rust 2015 and 2018", + @future_incompatible = FutureIncompatibleInfo { + reason: FutureIncompatibilityReason::EditionSemanticsChange(Edition::Edition2021), + reference: "<https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>", + }; +} + +declare_lint! { + /// The `boxed_slice_into_iter` lint detects calling `into_iter` on boxed slices. + /// + /// ### Example + /// + /// ```rust,edition2021 + /// # #![allow(unused)] + /// vec![1, 2, 3].into_boxed_slice().into_iter().for_each(|n| { *n; }); + /// ``` + /// + /// {{produces}} + /// + /// ### Explanation + /// + /// Since Rust CURRENT_RUSTC_VERSION, boxed slices implement `IntoIterator`. However, to avoid + /// breakage, `boxed_slice.into_iter()` in Rust 2015, 2018, and 2021 code will still + /// behave as `(&boxed_slice).into_iter()`, returning an iterator over + /// references, just like in Rust CURRENT_RUSTC_VERSION and earlier. + /// This only applies to the method call syntax `boxed_slice.into_iter()`, not to + /// any other syntax such as `for _ in boxed_slice` or `IntoIterator::into_iter(boxed_slice)`. + pub BOXED_SLICE_INTO_ITER, + Warn, + "detects calling `into_iter` on boxed slices in Rust 2015, 2018, and 2021", + @future_incompatible = FutureIncompatibleInfo { + reason: FutureIncompatibilityReason::EditionSemanticsChange(Edition::Edition2024), + }; +} + +#[derive(Copy, Clone)] +pub struct ShadowedIntoIter; + +impl_lint_pass!(ShadowedIntoIter => [ARRAY_INTO_ITER, BOXED_SLICE_INTO_ITER]); + +impl<'tcx> LateLintPass<'tcx> for ShadowedIntoIter { + fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'tcx>) { + let hir::ExprKind::MethodCall(call, receiver_arg, ..) = &expr.kind else { + return; + }; + + // Check if the method call actually calls the libcore + // `IntoIterator::into_iter`. + let Some(method_def_id) = cx.typeck_results().type_dependent_def_id(expr.hir_id) else { + return; + }; + if Some(method_def_id) != cx.tcx.lang_items().into_iter_fn() { + return; + } + + // As this is a method call expression, we have at least one argument. + let receiver_ty = cx.typeck_results().expr_ty(receiver_arg); + let adjustments = cx.typeck_results().expr_adjustments(receiver_arg); + + let adjusted_receiver_tys: Vec<_> = + [receiver_ty].into_iter().chain(adjustments.iter().map(|adj| adj.target)).collect(); + + fn is_ref_to_array(ty: Ty<'_>) -> bool { + if let ty::Ref(_, pointee_ty, _) = *ty.kind() { pointee_ty.is_array() } else { false } + } + fn is_boxed_slice(ty: Ty<'_>) -> bool { + ty.is_box() && ty.boxed_ty().is_slice() + } + fn is_ref_to_boxed_slice(ty: Ty<'_>) -> bool { + if let ty::Ref(_, pointee_ty, _) = *ty.kind() { + is_boxed_slice(pointee_ty) + } else { + false + } + } + + let (lint, target, edition, can_suggest_ufcs) = + if is_ref_to_array(*adjusted_receiver_tys.last().unwrap()) + && let Some(idx) = adjusted_receiver_tys + .iter() + .copied() + .take_while(|ty| !is_ref_to_array(*ty)) + .position(|ty| ty.is_array()) + { + (ARRAY_INTO_ITER, "[T; N]", "2021", idx == 0) + } else if is_ref_to_boxed_slice(*adjusted_receiver_tys.last().unwrap()) + && let Some(idx) = adjusted_receiver_tys + .iter() + .copied() + .take_while(|ty| !is_ref_to_boxed_slice(*ty)) + .position(|ty| is_boxed_slice(ty)) + { + (BOXED_SLICE_INTO_ITER, "Box<[T]>", "2024", idx == 0) + } else { + return; + }; + + // If this expression comes from the `IntoIter::into_iter` inside of a for loop, + // we should just suggest removing the `.into_iter()` or changing it to `.iter()` + // to disambiguate if we want to iterate by-value or by-ref. + let sub = if let Some((_, hir::Node::Expr(parent_expr))) = + cx.tcx.hir().parent_iter(expr.hir_id).nth(1) + && let hir::ExprKind::Match(arg, [_], hir::MatchSource::ForLoopDesugar) = + &parent_expr.kind + && let hir::ExprKind::Call(path, [_]) = &arg.kind + && let hir::ExprKind::Path(hir::QPath::LangItem(hir::LangItem::IntoIterIntoIter, ..)) = + &path.kind + { + Some(ShadowedIntoIterDiagSub::RemoveIntoIter { + span: receiver_arg.span.shrink_to_hi().to(expr.span.shrink_to_hi()), + }) + } else if can_suggest_ufcs { + Some(ShadowedIntoIterDiagSub::UseExplicitIntoIter { + start_span: expr.span.shrink_to_lo(), + end_span: receiver_arg.span.shrink_to_hi().to(expr.span.shrink_to_hi()), + }) + } else { + None + }; + + cx.emit_span_lint( + lint, + call.ident.span, + ShadowedIntoIterDiag { target, edition, suggestion: call.ident.span, sub }, + ); + } +} diff --git a/compiler/rustc_lint_defs/src/lib.rs b/compiler/rustc_lint_defs/src/lib.rs index e06e3e9b805..1941b0b1264 100644 --- a/compiler/rustc_lint_defs/src/lib.rs +++ b/compiler/rustc_lint_defs/src/lib.rs @@ -6,10 +6,12 @@ use rustc_data_structures::stable_hasher::{ HashStable, StableCompare, StableHasher, ToStableHashKey, }; use rustc_error_messages::{DiagMessage, MultiSpan}; +use rustc_hir::def::Namespace; use rustc_hir::HashStableContext; use rustc_hir::HirId; use rustc_macros::{Decodable, Encodable, HashStable_Generic}; use rustc_span::edition::Edition; +use rustc_span::symbol::MacroRulesNormalizedIdent; use rustc_span::{sym, symbol::Ident, Span, Symbol}; use rustc_target::spec::abi::Abi; @@ -565,19 +567,44 @@ pub struct AmbiguityErrorDiag { pub b2_help_msgs: Vec<String>, } +#[derive(Debug, Clone)] +pub enum DeprecatedSinceKind { + InEffect, + InFuture, + InVersion(String), +} + // This could be a closure, but then implementing derive trait // becomes hacky (and it gets allocated). #[derive(Debug)] pub enum BuiltinLintDiag { - Normal, AbsPathWithModule(Span), - ProcMacroDeriveResolutionFallback(Span), + ProcMacroDeriveResolutionFallback { + span: Span, + ns: Namespace, + ident: Ident, + }, MacroExpandedMacroExportsAccessedByAbsolutePaths(Span), ElidedLifetimesInPaths(usize, Span, bool, Span), - UnknownCrateTypes(Span, String, String), - UnusedImports(String, Vec<(Span, String)>, Option<Span>), + UnknownCrateTypes { + span: Span, + candidate: Option<Symbol>, + }, + UnusedImports { + remove_whole_use: bool, + num_to_remove: usize, + remove_spans: Vec<Span>, + test_module_span: Option<Span>, + span_snippets: Vec<String>, + }, RedundantImport(Vec<(Span, bool)>, Ident), - DeprecatedMacro(Option<Symbol>, Span), + DeprecatedMacro { + suggestion: Option<Symbol>, + suggestion_span: Span, + note: Option<Symbol>, + path: String, + since_kind: DeprecatedSinceKind, + }, MissingAbi(Span, Abi), UnusedDocComment(Span), UnusedBuiltinAttribute { @@ -585,18 +612,24 @@ pub enum BuiltinLintDiag { macro_name: String, invoc_span: Span, }, - PatternsInFnsWithoutBody(Span, Ident), + PatternsInFnsWithoutBody { + span: Span, + ident: Ident, + is_foreign: bool, + }, LegacyDeriveHelpers(Span), - ProcMacroBackCompat(String), + ProcMacroBackCompat { + crate_name: String, + fixed_version: String, + }, OrPatternsBackCompat(Span, String), - ReservedPrefix(Span), + ReservedPrefix(Span, String), TrailingMacro(bool, Ident), BreakWithLabelAndLoop(Span), - NamedAsmLabel(String), UnicodeTextFlow(Span, String), UnexpectedCfgName((Symbol, Span), Option<(Symbol, Span)>), UnexpectedCfgValue((Symbol, Span), Option<(Symbol, Span)>), - DeprecatedWhereclauseLocation(Option<(Span, String)>), + DeprecatedWhereclauseLocation(Span, Option<(Span, String)>), SingleUseLifetime { /// Span of the parameter which declares this lifetime. param_span: Span, @@ -606,6 +639,7 @@ pub enum BuiltinLintDiag { /// Span of the single use, or None if the lifetime is never used. /// If true, the lifetime will be fully elided. use_span: Option<(Span, bool)>, + ident: Ident, }, NamedArgumentUsedPositionally { /// Span where the named argument is used by position and will be replaced with the named @@ -620,7 +654,10 @@ pub enum BuiltinLintDiag { /// Indicates if the named argument is used as a width/precision for formatting is_formatting_arg: bool, }, - ByteSliceInPackedStructWithDerive, + ByteSliceInPackedStructWithDerive { + // FIXME: enum of byte/string + ty: String, + }, UnusedExternCrate { removal_span: Span, }, @@ -662,10 +699,43 @@ pub enum BuiltinLintDiag { RedundantImportVisibility { span: Span, max_vis: String, + import_vis: String, }, - MaybeTypo { + UnknownDiagnosticAttribute { span: Span, - name: Symbol, + typo_name: Option<Symbol>, + }, + MacroUseDeprecated, + UnusedMacroUse, + PrivateExternCrateReexport(Ident), + UnusedLabel, + MacroIsPrivate(Ident), + UnusedMacroDefinition(Symbol), + MacroRuleNeverUsed(usize, Symbol), + UnstableFeature(DiagMessage), + AvoidUsingIntelSyntax, + AvoidUsingAttSyntax, + IncompleteInclude, + UnnameableTestItems, + DuplicateMacroAttribute, + CfgAttrNoAttributes, + CrateTypeInCfgAttr, + CrateNameInCfgAttr, + MissingFragmentSpecifier, + MetaVariableStillRepeating(MacroRulesNormalizedIdent), + MetaVariableWrongOperator, + DuplicateMatcherBinding, + UnknownMacroVariable(MacroRulesNormalizedIdent), + UnusedCrateDependency { + extern_crate: Symbol, + local_crate: Symbol, + }, + WasmCAbi, + IllFormedAttributeInput { + suggestions: Vec<String>, + }, + InnerAttributeUnstable { + is_macro: bool, }, } @@ -676,9 +746,6 @@ pub struct BufferedEarlyLint { /// The span of code that we are linting on. pub span: MultiSpan, - /// The lint message. - pub msg: DiagMessage, - /// The `NodeId` of the AST node that generated the lint. pub node_id: NodeId, @@ -706,12 +773,10 @@ impl LintBuffer { lint: &'static Lint, node_id: NodeId, span: MultiSpan, - msg: impl Into<DiagMessage>, diagnostic: BuiltinLintDiag, ) { let lint_id = LintId::of(lint); - let msg = msg.into(); - self.add_early_lint(BufferedEarlyLint { lint_id, node_id, span, msg, diagnostic }); + self.add_early_lint(BufferedEarlyLint { lint_id, node_id, span, diagnostic }); } pub fn take(&mut self, id: NodeId) -> Vec<BufferedEarlyLint> { @@ -724,20 +789,9 @@ impl LintBuffer { lint: &'static Lint, id: NodeId, sp: impl Into<MultiSpan>, - msg: impl Into<DiagMessage>, - ) { - self.add_lint(lint, id, sp.into(), msg, BuiltinLintDiag::Normal) - } - - pub fn buffer_lint_with_diagnostic( - &mut self, - lint: &'static Lint, - id: NodeId, - sp: impl Into<MultiSpan>, - msg: impl Into<DiagMessage>, diagnostic: BuiltinLintDiag, ) { - self.add_lint(lint, id, sp.into(), msg, diagnostic) + self.add_lint(lint, id, sp.into(), diagnostic) } } diff --git a/compiler/rustc_log/src/lib.rs b/compiler/rustc_log/src/lib.rs index 81257f9be88..e11c45b66e6 100644 --- a/compiler/rustc_log/src/lib.rs +++ b/compiler/rustc_log/src/lib.rs @@ -159,7 +159,9 @@ where if !target.contains(&self.backtrace_target) { return Ok(()); } - let backtrace = std::backtrace::Backtrace::capture(); + // Use Backtrace::force_capture because we don't want to depend on the + // RUST_BACKTRACE environment variable being set. + let backtrace = std::backtrace::Backtrace::force_capture(); writeln!(writer, "stack backtrace: \n{backtrace:?}") } } diff --git a/compiler/rustc_macros/src/diagnostics/diagnostic_builder.rs b/compiler/rustc_macros/src/diagnostics/diagnostic_builder.rs index ae481efb263..38d4a5ee61c 100644 --- a/compiler/rustc_macros/src/diagnostics/diagnostic_builder.rs +++ b/compiler/rustc_macros/src/diagnostics/diagnostic_builder.rs @@ -158,7 +158,9 @@ impl DiagnosticDeriveVariantBuilder { let slug = subdiag.slug.unwrap_or_else(|| match subdiag.kind { SubdiagnosticKind::Label => parse_quote! { _subdiag::label }, SubdiagnosticKind::Note => parse_quote! { _subdiag::note }, + SubdiagnosticKind::NoteOnce => parse_quote! { _subdiag::note_once }, SubdiagnosticKind::Help => parse_quote! { _subdiag::help }, + SubdiagnosticKind::HelpOnce => parse_quote! { _subdiag::help_once }, SubdiagnosticKind::Warn => parse_quote! { _subdiag::warn }, SubdiagnosticKind::Suggestion { .. } => parse_quote! { _subdiag::suggestion }, SubdiagnosticKind::MultipartSuggestion { .. } => unreachable!(), @@ -233,9 +235,11 @@ impl DiagnosticDeriveVariantBuilder { }; let fn_ident = format_ident!("{}", subdiag); match subdiag { - SubdiagnosticKind::Note | SubdiagnosticKind::Help | SubdiagnosticKind::Warn => { - Ok(self.add_subdiagnostic(&fn_ident, slug)) - } + SubdiagnosticKind::Note + | SubdiagnosticKind::NoteOnce + | SubdiagnosticKind::Help + | SubdiagnosticKind::HelpOnce + | SubdiagnosticKind::Warn => Ok(self.add_subdiagnostic(&fn_ident, slug)), SubdiagnosticKind::Label | SubdiagnosticKind::Suggestion { .. } => { throw_invalid_attr!(attr, |diag| diag .help("`#[label]` and `#[suggestion]` can only be applied to fields")); @@ -347,7 +351,11 @@ impl DiagnosticDeriveVariantBuilder { report_error_if_not_applied_to_span(attr, &info)?; Ok(self.add_spanned_subdiagnostic(binding, &fn_ident, slug)) } - SubdiagnosticKind::Note | SubdiagnosticKind::Help | SubdiagnosticKind::Warn => { + SubdiagnosticKind::Note + | SubdiagnosticKind::NoteOnce + | SubdiagnosticKind::Help + | SubdiagnosticKind::HelpOnce + | SubdiagnosticKind::Warn => { let inner = info.ty.inner_type(); if type_matches_path(inner, &["rustc_span", "Span"]) || type_matches_path(inner, &["rustc_span", "MultiSpan"]) diff --git a/compiler/rustc_macros/src/diagnostics/subdiagnostic.rs b/compiler/rustc_macros/src/diagnostics/subdiagnostic.rs index 45236771bce..69014f39925 100644 --- a/compiler/rustc_macros/src/diagnostics/subdiagnostic.rs +++ b/compiler/rustc_macros/src/diagnostics/subdiagnostic.rs @@ -510,11 +510,11 @@ impl<'parent, 'a> SubdiagnosticDeriveVariantBuilder<'parent, 'a> { .map(|binding| self.generate_field_attr_code(binding, kind_stats)) .collect(); - if kind_slugs.is_empty() { + if kind_slugs.is_empty() && !self.has_subdiagnostic { if self.is_enum { // It's okay for a variant to not be a subdiagnostic at all.. return Ok(quote! {}); - } else if !self.has_subdiagnostic { + } else { // ..but structs should always be _something_. throw_span_err!( self.variant.ast().ident.span().unwrap(), diff --git a/compiler/rustc_macros/src/diagnostics/utils.rs b/compiler/rustc_macros/src/diagnostics/utils.rs index 4684306e235..05a5a32514b 100644 --- a/compiler/rustc_macros/src/diagnostics/utils.rs +++ b/compiler/rustc_macros/src/diagnostics/utils.rs @@ -575,8 +575,12 @@ pub(super) enum SubdiagnosticKind { Label, /// `#[note(...)]` Note, + /// `#[note_once(...)]` + NoteOnce, /// `#[help(...)]` Help, + /// `#[help_once(...)]` + HelpOnce, /// `#[warning(...)]` Warn, /// `#[suggestion{,_short,_hidden,_verbose}]` @@ -624,7 +628,9 @@ impl SubdiagnosticVariant { let mut kind = match name { "label" => SubdiagnosticKind::Label, "note" => SubdiagnosticKind::Note, + "note_once" => SubdiagnosticKind::NoteOnce, "help" => SubdiagnosticKind::Help, + "help_once" => SubdiagnosticKind::HelpOnce, "warning" => SubdiagnosticKind::Warn, _ => { // Recover old `#[(multipart_)suggestion_*]` syntaxes @@ -682,7 +688,9 @@ impl SubdiagnosticVariant { match kind { SubdiagnosticKind::Label | SubdiagnosticKind::Note + | SubdiagnosticKind::NoteOnce | SubdiagnosticKind::Help + | SubdiagnosticKind::HelpOnce | SubdiagnosticKind::Warn | SubdiagnosticKind::MultipartSuggestion { .. } => { return Ok(Some(SubdiagnosticVariant { kind, slug: None, no_span: false })); @@ -836,7 +844,9 @@ impl SubdiagnosticVariant { } SubdiagnosticKind::Label | SubdiagnosticKind::Note + | SubdiagnosticKind::NoteOnce | SubdiagnosticKind::Help + | SubdiagnosticKind::HelpOnce | SubdiagnosticKind::Warn => {} } @@ -849,7 +859,9 @@ impl quote::IdentFragment for SubdiagnosticKind { match self { SubdiagnosticKind::Label => write!(f, "label"), SubdiagnosticKind::Note => write!(f, "note"), + SubdiagnosticKind::NoteOnce => write!(f, "note_once"), SubdiagnosticKind::Help => write!(f, "help"), + SubdiagnosticKind::HelpOnce => write!(f, "help_once"), SubdiagnosticKind::Warn => write!(f, "warn"), SubdiagnosticKind::Suggestion { .. } => write!(f, "suggestions_with_style"), SubdiagnosticKind::MultipartSuggestion { .. } => { diff --git a/compiler/rustc_macros/src/lib.rs b/compiler/rustc_macros/src/lib.rs index c7b7eadbd9d..de9c916b4f0 100644 --- a/compiler/rustc_macros/src/lib.rs +++ b/compiler/rustc_macros/src/lib.rs @@ -108,7 +108,9 @@ decl_derive!( // struct attributes diag, help, + help_once, note, + note_once, warning, // field attributes skip_arg, @@ -125,7 +127,9 @@ decl_derive!( // struct attributes diag, help, + help_once, note, + note_once, warning, // field attributes skip_arg, @@ -142,7 +146,9 @@ decl_derive!( // struct/variant attributes label, help, + help_once, note, + note_once, warning, subdiagnostic, suggestion, diff --git a/compiler/rustc_macros/src/serialize.rs b/compiler/rustc_macros/src/serialize.rs index 5fa11d22f0e..7b5dd1601c1 100644 --- a/compiler/rustc_macros/src/serialize.rs +++ b/compiler/rustc_macros/src/serialize.rs @@ -13,7 +13,7 @@ pub fn type_decodable_derive(mut s: synstructure::Structure<'_>) -> proc_macro2: quote! {} }; - s.add_impl_generic(parse_quote! {#decoder_ty: ::rustc_type_ir::codec::TyDecoder #bound }); + s.add_impl_generic(parse_quote! { #decoder_ty: ::rustc_type_ir::codec::TyDecoder #bound }); s.add_bounds(synstructure::AddBounds::Fields); s.underscore_const(true); @@ -34,7 +34,7 @@ pub fn meta_decodable_derive(mut s: synstructure::Structure<'_>) -> proc_macro2: pub fn decodable_derive(mut s: synstructure::Structure<'_>) -> proc_macro2::TokenStream { let decoder_ty = quote! { __D }; - s.add_impl_generic(parse_quote! {#decoder_ty: ::rustc_span::SpanDecoder}); + s.add_impl_generic(parse_quote! { #decoder_ty: ::rustc_span::SpanDecoder }); s.add_bounds(synstructure::AddBounds::Generics); s.underscore_const(true); @@ -43,7 +43,7 @@ pub fn decodable_derive(mut s: synstructure::Structure<'_>) -> proc_macro2::Toke pub fn decodable_generic_derive(mut s: synstructure::Structure<'_>) -> proc_macro2::TokenStream { let decoder_ty = quote! { __D }; - s.add_impl_generic(parse_quote! {#decoder_ty: ::rustc_serialize::Decoder}); + s.add_impl_generic(parse_quote! { #decoder_ty: ::rustc_serialize::Decoder }); s.add_bounds(synstructure::AddBounds::Generics); s.underscore_const(true); @@ -120,7 +120,7 @@ fn decode_field(field: &syn::Field) -> proc_macro2::TokenStream { let __decoder = quote! { __decoder }; // Use the span of the field for the method call, so // that backtraces will point to the field. - quote_spanned! {field_span=> #decode_inner_method(#__decoder) } + quote_spanned! { field_span=> #decode_inner_method(#__decoder) } } pub fn type_encodable_derive(mut s: synstructure::Structure<'_>) -> proc_macro2::TokenStream { @@ -133,7 +133,7 @@ pub fn type_encodable_derive(mut s: synstructure::Structure<'_>) -> proc_macro2: }; let encoder_ty = quote! { __E }; - s.add_impl_generic(parse_quote! {#encoder_ty: ::rustc_type_ir::codec::TyEncoder #bound }); + s.add_impl_generic(parse_quote! { #encoder_ty: ::rustc_type_ir::codec::TyEncoder #bound }); s.add_bounds(synstructure::AddBounds::Fields); s.underscore_const(true); @@ -142,7 +142,7 @@ pub fn type_encodable_derive(mut s: synstructure::Structure<'_>) -> proc_macro2: pub fn meta_encodable_derive(mut s: synstructure::Structure<'_>) -> proc_macro2::TokenStream { if !s.ast().generics.lifetimes().any(|lt| lt.lifetime.ident == "tcx") { - s.add_impl_generic(parse_quote! {'tcx}); + s.add_impl_generic(parse_quote! { 'tcx }); } s.add_impl_generic(parse_quote! { '__a }); let encoder_ty = quote! { EncodeContext<'__a, 'tcx> }; @@ -154,7 +154,7 @@ pub fn meta_encodable_derive(mut s: synstructure::Structure<'_>) -> proc_macro2: pub fn encodable_derive(mut s: synstructure::Structure<'_>) -> proc_macro2::TokenStream { let encoder_ty = quote! { __E }; - s.add_impl_generic(parse_quote! { #encoder_ty: ::rustc_span::SpanEncoder}); + s.add_impl_generic(parse_quote! { #encoder_ty: ::rustc_span::SpanEncoder }); s.add_bounds(synstructure::AddBounds::Generics); s.underscore_const(true); @@ -163,7 +163,7 @@ pub fn encodable_derive(mut s: synstructure::Structure<'_>) -> proc_macro2::Toke pub fn encodable_generic_derive(mut s: synstructure::Structure<'_>) -> proc_macro2::TokenStream { let encoder_ty = quote! { __E }; - s.add_impl_generic(parse_quote! { #encoder_ty: ::rustc_serialize::Encoder}); + s.add_impl_generic(parse_quote! { #encoder_ty: ::rustc_serialize::Encoder }); s.add_bounds(synstructure::AddBounds::Generics); s.underscore_const(true); diff --git a/compiler/rustc_metadata/messages.ftl b/compiler/rustc_metadata/messages.ftl index 3d0846ae6de..2f5dfad265c 100644 --- a/compiler/rustc_metadata/messages.ftl +++ b/compiler/rustc_metadata/messages.ftl @@ -284,8 +284,6 @@ metadata_unsupported_abi = metadata_unsupported_abi_i686 = ABI not supported by `#[link(kind = "raw-dylib")]` on i686 -metadata_wasm_c_abi = - older versions of the `wasm-bindgen` crate will be incompatible with future versions of Rust; please update to `wasm-bindgen` v0.2.88 metadata_wasm_import_form = wasm import module must be of the form `wasm_import_module = "string"` diff --git a/compiler/rustc_metadata/src/creader.rs b/compiler/rustc_metadata/src/creader.rs index e3205fc1d30..be1a73ef0a7 100644 --- a/compiler/rustc_metadata/src/creader.rs +++ b/compiler/rustc_metadata/src/creader.rs @@ -20,7 +20,7 @@ use rustc_middle::bug; use rustc_middle::ty::{TyCtxt, TyCtxtFeed}; use rustc_session::config::{self, CrateType, ExternLocation}; use rustc_session::cstore::{CrateDepKind, CrateSource, ExternCrate, ExternCrateSource}; -use rustc_session::lint; +use rustc_session::lint::{self, BuiltinLintDiag}; use rustc_session::output::validate_crate_name; use rustc_session::search_paths::PathKind; use rustc_span::edition::Edition; @@ -975,15 +975,14 @@ impl<'a, 'tcx> CrateLoader<'a, 'tcx> { } self.sess.psess.buffer_lint( - lint::builtin::UNUSED_CRATE_DEPENDENCIES, - span, - ast::CRATE_NODE_ID, - format!( - "external crate `{}` unused in `{}`: remove the dependency or add `use {} as _;`", - name, - self.tcx.crate_name(LOCAL_CRATE), - name), - ); + lint::builtin::UNUSED_CRATE_DEPENDENCIES, + span, + ast::CRATE_NODE_ID, + BuiltinLintDiag::UnusedCrateDependency { + extern_crate: name_interned, + local_crate: self.tcx.crate_name(LOCAL_CRATE), + }, + ); } } @@ -1020,7 +1019,7 @@ impl<'a, 'tcx> CrateLoader<'a, 'tcx> { lint::builtin::WASM_C_ABI, span, ast::CRATE_NODE_ID, - crate::fluent_generated::metadata_wasm_c_abi, + BuiltinLintDiag::WasmCAbi, ); } } diff --git a/compiler/rustc_metadata/src/lib.rs b/compiler/rustc_metadata/src/lib.rs index 99584845e49..00bb4c435c8 100644 --- a/compiler/rustc_metadata/src/lib.rs +++ b/compiler/rustc_metadata/src/lib.rs @@ -1,21 +1,22 @@ +// tidy-alphabetical-start +#![allow(internal_features)] +#![allow(rustc::potential_query_instability)] #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")] #![doc(rust_logo)] -#![feature(rustdoc_internals)] -#![allow(internal_features)] +#![feature(coroutines)] #![feature(decl_macro)] #![feature(error_iter)] #![feature(extract_if)] -#![feature(coroutines)] +#![feature(if_let_guard)] #![feature(iter_from_coroutine)] #![feature(let_chains)] -#![feature(if_let_guard)] -#![feature(proc_macro_internals)] #![feature(macro_metavar_expr)] #![feature(min_specialization)] -#![feature(trusted_len)] -#![feature(try_blocks)] #![feature(never_type)] -#![allow(rustc::potential_query_instability)] +#![feature(proc_macro_internals)] +#![feature(rustdoc_internals)] +#![feature(trusted_len)] +// tidy-alphabetical-end extern crate proc_macro; diff --git a/compiler/rustc_metadata/src/locator.rs b/compiler/rustc_metadata/src/locator.rs index 7de03be6da6..6ff19974c1e 100644 --- a/compiler/rustc_metadata/src/locator.rs +++ b/compiler/rustc_metadata/src/locator.rs @@ -853,7 +853,12 @@ fn get_metadata_section<'p>( slice_owned(mmap, Deref::deref) } }; - let blob = MetadataBlob(raw_bytes); + let Ok(blob) = MetadataBlob::new(raw_bytes) else { + return Err(MetadataError::LoadFailure(format!( + "corrupt metadata encountered in {}", + filename.display() + ))); + }; match blob.check_compatibility(cfg_version) { Ok(()) => Ok(blob), Err(None) => Err(MetadataError::LoadFailure(format!( diff --git a/compiler/rustc_metadata/src/rmeta/decoder.rs b/compiler/rustc_metadata/src/rmeta/decoder.rs index bb68c6eaf09..f91e121a240 100644 --- a/compiler/rustc_metadata/src/rmeta/decoder.rs +++ b/compiler/rustc_metadata/src/rmeta/decoder.rs @@ -40,10 +40,9 @@ use rustc_span::hygiene::HygieneDecodeContext; mod cstore_impl; /// A reference to the raw binary version of crate metadata. -/// A `MetadataBlob` internally is just a reference counted pointer to -/// the actual data, so cloning it is cheap. -#[derive(Clone)] -pub(crate) struct MetadataBlob(pub(crate) OwnedSlice); +/// This struct applies [`MemDecoder`]'s validation when constructed +/// so that later constructions are guaranteed to succeed. +pub(crate) struct MetadataBlob(OwnedSlice); impl std::ops::Deref for MetadataBlob { type Target = [u8]; @@ -54,6 +53,19 @@ impl std::ops::Deref for MetadataBlob { } } +impl MetadataBlob { + /// Runs the [`MemDecoder`] validation and if it passes, constructs a new [`MetadataBlob`]. + pub fn new(slice: OwnedSlice) -> Result<Self, ()> { + if MemDecoder::new(&slice, 0).is_ok() { Ok(Self(slice)) } else { Err(()) } + } + + /// Since this has passed the validation of [`MetadataBlob::new`], this returns bytes which are + /// known to pass the [`MemDecoder`] validation. + pub fn bytes(&self) -> &OwnedSlice { + &self.0 + } +} + /// A map from external crate numbers (as decoded from some crate file) to /// local crate numbers (as generated during this session). Each external /// crate may refer to types in other external crates, and each has their @@ -165,7 +177,14 @@ pub(super) trait Metadata<'a, 'tcx>: Copy { fn decoder(self, pos: usize) -> DecodeContext<'a, 'tcx> { let tcx = self.tcx(); DecodeContext { - opaque: MemDecoder::new(self.blob(), pos), + // FIXME: This unwrap should never panic because we check that it won't when creating + // `MetadataBlob`. Ideally we'd just have a `MetadataDecoder` and hand out subslices of + // it as we do elsewhere in the compiler using `MetadataDecoder::split_at`. But we own + // the data for the decoder so holding onto the `MemDecoder` too would make us a + // self-referential struct which is downright goofy because `MetadataBlob` is already + // self-referential. Probably `MemDecoder` should contain an `OwnedSlice`, but that + // demands a significant refactoring due to our crate graph. + opaque: MemDecoder::new(self.blob(), pos).unwrap(), cdata: self.cdata(), blob: self.blob(), sess: self.sess().or(tcx.map(|tcx| tcx.sess)), @@ -393,7 +412,7 @@ impl<'a, 'tcx> TyDecoder for DecodeContext<'a, 'tcx> { where F: FnOnce(&mut Self) -> R, { - let new_opaque = MemDecoder::new(self.opaque.data(), pos); + let new_opaque = self.opaque.split_at(pos); let old_opaque = mem::replace(&mut self.opaque, new_opaque); let old_state = mem::replace(&mut self.lazy_state, LazyState::NoNode); let r = f(self); diff --git a/compiler/rustc_metadata/src/rmeta/def_path_hash_map.rs b/compiler/rustc_metadata/src/rmeta/def_path_hash_map.rs index 9950bc1c31f..861bf6b2769 100644 --- a/compiler/rustc_metadata/src/rmeta/def_path_hash_map.rs +++ b/compiler/rustc_metadata/src/rmeta/def_path_hash_map.rs @@ -48,7 +48,7 @@ impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for DefPathHashMapRef<'static> fn decode(d: &mut DecodeContext<'a, 'tcx>) -> DefPathHashMapRef<'static> { let len = d.read_usize(); let pos = d.position(); - let o = d.blob().clone().0.slice(|blob| &blob[pos..pos + len]); + let o = d.blob().bytes().clone().slice(|blob| &blob[pos..pos + len]); // Although we already have the data we need via the `OwnedSlice`, we still need // to advance the `DecodeContext`'s position so it's in a valid state after diff --git a/compiler/rustc_metadata/src/rmeta/mod.rs b/compiler/rustc_metadata/src/rmeta/mod.rs index 79e4ff81093..825034cf96a 100644 --- a/compiler/rustc_metadata/src/rmeta/mod.rs +++ b/compiler/rustc_metadata/src/rmeta/mod.rs @@ -1,15 +1,13 @@ use crate::creader::CrateMetadataRef; -use decoder::Metadata; +pub(crate) use decoder::{CrateMetadata, CrateNumMap, MetadataBlob}; +use decoder::{DecodeContext, Metadata}; use def_path_hash_map::DefPathHashMapRef; -use rustc_data_structures::fx::FxHashMap; -use rustc_macros::{Decodable, Encodable, TyDecodable, TyEncodable}; -use rustc_middle::middle::debugger_visualizer::DebuggerVisualizerFile; -use rustc_middle::middle::lib_features::FeatureStability; -use table::TableBuilder; - +use encoder::EncodeContext; +pub use encoder::{encode_metadata, rendered_const, EncodedMetadata}; use rustc_ast as ast; use rustc_ast::expand::StrippedCfgItem; use rustc_attr as attr; +use rustc_data_structures::fx::FxHashMap; use rustc_data_structures::svh::Svh; use rustc_hir as hir; use rustc_hir::def::{CtorKind, DefKind, DocLinkResMap}; @@ -18,10 +16,13 @@ use rustc_hir::definitions::DefKey; use rustc_hir::lang_items::LangItem; use rustc_index::bit_set::BitSet; use rustc_index::IndexVec; +use rustc_macros::{Decodable, Encodable, TyDecodable, TyEncodable}; use rustc_macros::{MetadataDecodable, MetadataEncodable}; use rustc_middle::metadata::ModChild; use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrs; +use rustc_middle::middle::debugger_visualizer::DebuggerVisualizerFile; use rustc_middle::middle::exported_symbols::{ExportedSymbol, SymbolExportInfo}; +use rustc_middle::middle::lib_features::FeatureStability; use rustc_middle::middle::resolve_bound_vars::ObjectLifetimeDefault; use rustc_middle::mir; use rustc_middle::trivially_parameterized_over_tcx; @@ -33,20 +34,14 @@ use rustc_serialize::opaque::FileEncoder; use rustc_session::config::SymbolManglingVersion; use rustc_session::cstore::{CrateDepKind, ForeignModule, LinkagePreference, NativeLib}; use rustc_span::edition::Edition; -use rustc_span::hygiene::{ExpnIndex, MacroKind}; +use rustc_span::hygiene::{ExpnIndex, MacroKind, SyntaxContextData}; use rustc_span::symbol::{Ident, Symbol}; use rustc_span::{self, ExpnData, ExpnHash, ExpnId, Span}; use rustc_target::abi::{FieldIdx, VariantIdx}; use rustc_target::spec::{PanicStrategy, TargetTriple}; - use std::marker::PhantomData; use std::num::NonZero; - -use decoder::DecodeContext; -pub(crate) use decoder::{CrateMetadata, CrateNumMap, MetadataBlob}; -use encoder::EncodeContext; -pub use encoder::{encode_metadata, rendered_const, EncodedMetadata}; -use rustc_span::hygiene::SyntaxContextData; +use table::TableBuilder; mod decoder; mod def_path_hash_map; diff --git a/compiler/rustc_middle/messages.ftl b/compiler/rustc_middle/messages.ftl index 27d555d7e26..f4d619329eb 100644 --- a/compiler/rustc_middle/messages.ftl +++ b/compiler/rustc_middle/messages.ftl @@ -50,6 +50,20 @@ middle_const_not_used_in_type_alias = middle_cycle = a cycle occurred during layout computation +middle_deprecated = use of deprecated {$kind} `{$path}`{$has_note -> + [true] : {$note} + *[other] {""} + } +middle_deprecated_in_future = use of {$kind} `{$path}` that will be deprecated in a future Rust version{$has_note -> + [true] : {$note} + *[other] {""} + } +middle_deprecated_in_version = use of {$kind} `{$path}` that will be deprecated in future version {$version}{$has_note -> + [true] : {$note} + *[other] {""} + } +middle_deprecated_suggestion = replace the use of the deprecated {$kind} + middle_drop_check_overflow = overflow while adding drop-check rules for {$ty} .note = overflowed on {$overflow_ty} diff --git a/compiler/rustc_middle/src/hir/map/mod.rs b/compiler/rustc_middle/src/hir/map/mod.rs index f4ecc0973ef..f3f24f77177 100644 --- a/compiler/rustc_middle/src/hir/map/mod.rs +++ b/compiler/rustc_middle/src/hir/map/mod.rs @@ -511,14 +511,14 @@ impl<'hir> Map<'hir> { self.body_const_context(self.enclosing_body_owner(hir_id)).is_some() } - /// Retrieves the `HirId` for `id`'s enclosing method, unless there's a - /// `while` or `loop` before reaching it, as block tail returns are not - /// available in them. + /// Retrieves the `HirId` for `id`'s enclosing function *if* the `id` block or return is + /// in the "tail" position of the function, in other words if it's likely to correspond + /// to the return type of the function. /// /// ``` /// fn foo(x: usize) -> bool { /// if x == 1 { - /// true // If `get_return_block` gets passed the `id` corresponding + /// true // If `get_fn_id_for_return_block` gets passed the `id` corresponding /// } else { // to this, it will return `foo`'s `HirId`. /// false /// } @@ -528,12 +528,12 @@ impl<'hir> Map<'hir> { /// ```compile_fail,E0308 /// fn foo(x: usize) -> bool { /// loop { - /// true // If `get_return_block` gets passed the `id` corresponding + /// true // If `get_fn_id_for_return_block` gets passed the `id` corresponding /// } // to this, it will return `None`. /// false /// } /// ``` - pub fn get_return_block(self, id: HirId) -> Option<HirId> { + pub fn get_fn_id_for_return_block(self, id: HirId) -> Option<HirId> { let mut iter = self.parent_iter(id).peekable(); let mut ignore_tail = false; if let Node::Expr(Expr { kind: ExprKind::Ret(_), .. }) = self.tcx.hir_node(id) { @@ -549,7 +549,11 @@ impl<'hir> Map<'hir> { Node::Block(Block { expr: None, .. }) => return None, // The current node is not the tail expression of its parent. Node::Block(Block { expr: Some(e), .. }) if hir_id != e.hir_id => return None, - Node::Block(Block { expr: Some(e), ..}) if matches!(e.kind, ExprKind::If(_, _, None)) => return None, + Node::Block(Block { expr: Some(e), .. }) + if matches!(e.kind, ExprKind::If(_, _, None)) => + { + return None; + } _ => {} } } diff --git a/compiler/rustc_middle/src/infer/canonical.rs b/compiler/rustc_middle/src/infer/canonical.rs index 49bf03e9c75..dba71d88f40 100644 --- a/compiler/rustc_middle/src/infer/canonical.rs +++ b/compiler/rustc_middle/src/infer/canonical.rs @@ -32,7 +32,7 @@ use std::collections::hash_map::Entry; use crate::infer::MemberConstraint; use crate::mir::ConstraintCategory; use crate::ty::GenericArg; -use crate::ty::{self, List, Region, Ty, TyCtxt, TypeFlags, TypeVisitableExt}; +use crate::ty::{self, List, Ty, TyCtxt, TypeFlags, TypeVisitableExt}; pub type Canonical<'tcx, V> = ir::Canonical<TyCtxt<'tcx>, V>; pub type CanonicalVarInfo<'tcx> = ir::CanonicalVarInfo<TyCtxt<'tcx>>; @@ -141,7 +141,7 @@ impl<'tcx, R> QueryResponse<'tcx, R> { } pub type QueryOutlivesConstraint<'tcx> = - (ty::OutlivesPredicate<GenericArg<'tcx>, Region<'tcx>>, ConstraintCategory<'tcx>); + (ty::OutlivesPredicate<'tcx, GenericArg<'tcx>>, ConstraintCategory<'tcx>); TrivialTypeTraversalImpls! { crate::infer::canonical::Certainty, diff --git a/compiler/rustc_middle/src/lib.rs b/compiler/rustc_middle/src/lib.rs index 04fd4c8d0f7..70437fdcb6f 100644 --- a/compiler/rustc_middle/src/lib.rs +++ b/compiler/rustc_middle/src/lib.rs @@ -22,46 +22,46 @@ //! //! This API is completely unstable and subject to change. +// tidy-alphabetical-start +#![allow(internal_features)] +#![allow(rustc::diagnostic_outside_of_impl)] +#![allow(rustc::potential_query_instability)] +#![allow(rustc::untranslatable_diagnostic)] #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")] #![doc(rust_logo)] -#![feature(min_exhaustive_patterns)] -#![feature(rustdoc_internals)] #![feature(allocator_api)] #![feature(array_windows)] #![feature(assert_matches)] #![feature(box_patterns)] #![feature(closure_track_caller)] -#![feature(core_intrinsics)] +#![feature(const_option)] #![feature(const_type_name)] -#![feature(discriminant_kind)] +#![feature(core_intrinsics)] #![feature(coroutines)] -#![feature(stmt_expr_attributes)] +#![feature(decl_macro)] +#![feature(discriminant_kind)] +#![feature(extern_types)] +#![feature(extract_if)] #![feature(if_let_guard)] +#![feature(intra_doc_pointers)] #![feature(iter_from_coroutine)] +#![feature(let_chains)] +#![feature(macro_metavar_expr)] +#![feature(min_exhaustive_patterns)] +#![feature(min_specialization)] #![feature(negative_impls)] #![feature(never_type)] -#![feature(extern_types)] #![feature(new_uninit)] -#![feature(let_chains)] -#![feature(min_specialization)] -#![feature(trusted_len)] -#![feature(type_alias_impl_trait)] -#![feature(strict_provenance)] +#![feature(ptr_alignment_type)] #![feature(rustc_attrs)] -#![feature(control_flow_enum)] +#![feature(rustdoc_internals)] +#![feature(strict_provenance)] #![feature(trait_upcasting)] +#![feature(trusted_len)] #![feature(try_blocks)] -#![feature(decl_macro)] -#![feature(extract_if)] -#![feature(intra_doc_pointers)] +#![feature(type_alias_impl_trait)] #![feature(yeet_expr)] -#![feature(const_option)] -#![feature(ptr_alignment_type)] -#![feature(macro_metavar_expr)] -#![allow(internal_features)] -#![allow(rustc::potential_query_instability)] -#![allow(rustc::diagnostic_outside_of_impl)] -#![allow(rustc::untranslatable_diagnostic)] +// tidy-alphabetical-end #[macro_use] extern crate tracing; diff --git a/compiler/rustc_middle/src/middle/stability.rs b/compiler/rustc_middle/src/middle/stability.rs index 67bd53f53da..e5df05763b0 100644 --- a/compiler/rustc_middle/src/middle/stability.rs +++ b/compiler/rustc_middle/src/middle/stability.rs @@ -9,15 +9,15 @@ use rustc_attr::{ self as attr, ConstStability, DefaultBodyStability, DeprecatedSince, Deprecation, Stability, }; use rustc_data_structures::unord::UnordMap; -use rustc_errors::{Applicability, Diag}; +use rustc_errors::{Applicability, Diag, EmissionGuarantee}; use rustc_feature::GateIssue; use rustc_hir::def::DefKind; use rustc_hir::def_id::{DefId, LocalDefId, LocalDefIdMap}; use rustc_hir::{self as hir, HirId}; -use rustc_macros::{Decodable, Encodable, HashStable}; +use rustc_macros::{Decodable, Encodable, HashStable, Subdiagnostic}; use rustc_middle::ty::print::with_no_trimmed_paths; use rustc_session::lint::builtin::{DEPRECATED, DEPRECATED_IN_FUTURE, SOFT_UNSTABLE}; -use rustc_session::lint::{BuiltinLintDiag, Level, Lint, LintBuffer}; +use rustc_session::lint::{BuiltinLintDiag, DeprecatedSinceKind, Level, Lint, LintBuffer}; use rustc_session::parse::feature_err_issue; use rustc_session::Session; use rustc_span::symbol::{sym, Symbol}; @@ -125,90 +125,107 @@ pub fn report_unstable( } } -pub fn deprecation_suggestion( - diag: &mut Diag<'_, ()>, - kind: &str, - suggestion: Option<Symbol>, - span: Span, -) { - if let Some(suggestion) = suggestion { - diag.span_suggestion_verbose( - span, - format!("replace the use of the deprecated {kind}"), - suggestion, - Applicability::MachineApplicable, - ); - } -} - fn deprecation_lint(is_in_effect: bool) -> &'static Lint { if is_in_effect { DEPRECATED } else { DEPRECATED_IN_FUTURE } } -fn deprecation_message( - is_in_effect: bool, - since: DeprecatedSince, - note: Option<Symbol>, - kind: &str, - path: &str, -) -> String { - let message = if is_in_effect { - format!("use of deprecated {kind} `{path}`") +#[derive(Subdiagnostic)] +#[suggestion( + middle_deprecated_suggestion, + code = "{suggestion}", + style = "verbose", + applicability = "machine-applicable" +)] +pub struct DeprecationSuggestion { + #[primary_span] + pub span: Span, + + pub kind: String, + pub suggestion: Symbol, +} + +pub struct Deprecated { + pub sub: Option<DeprecationSuggestion>, + + // FIXME: make this translatable + pub kind: String, + pub path: String, + pub note: Option<Symbol>, + pub since_kind: DeprecatedSinceKind, +} + +impl<'a, G: EmissionGuarantee> rustc_errors::LintDiagnostic<'a, G> for Deprecated { + fn decorate_lint<'b>(self, diag: &'b mut Diag<'a, G>) { + diag.arg("kind", self.kind); + diag.arg("path", self.path); + if let DeprecatedSinceKind::InVersion(version) = self.since_kind { + diag.arg("version", version); + } + if let Some(note) = self.note { + diag.arg("has_note", true); + diag.arg("note", note); + } else { + diag.arg("has_note", false); + } + if let Some(sub) = self.sub { + diag.subdiagnostic(diag.dcx, sub); + } + } + + fn msg(&self) -> rustc_errors::DiagMessage { + match &self.since_kind { + DeprecatedSinceKind::InEffect => crate::fluent_generated::middle_deprecated, + DeprecatedSinceKind::InFuture => crate::fluent_generated::middle_deprecated_in_future, + DeprecatedSinceKind::InVersion(_) => { + crate::fluent_generated::middle_deprecated_in_version + } + } + } +} + +fn deprecated_since_kind(is_in_effect: bool, since: DeprecatedSince) -> DeprecatedSinceKind { + if is_in_effect { + DeprecatedSinceKind::InEffect } else { match since { - DeprecatedSince::RustcVersion(version) => format!( - "use of {kind} `{path}` that will be deprecated in future version {version}" - ), - DeprecatedSince::Future => { - format!("use of {kind} `{path}` that will be deprecated in a future Rust version") + DeprecatedSince::RustcVersion(version) => { + DeprecatedSinceKind::InVersion(version.to_string()) } + DeprecatedSince::Future => DeprecatedSinceKind::InFuture, DeprecatedSince::NonStandard(_) | DeprecatedSince::Unspecified | DeprecatedSince::Err => { unreachable!("this deprecation is always in effect; {since:?}") } } - }; - - match note { - Some(reason) => format!("{message}: {reason}"), - None => message, } } -pub fn deprecation_message_and_lint( - depr: &Deprecation, - kind: &str, - path: &str, -) -> (String, &'static Lint) { - let is_in_effect = depr.is_in_effect(); - ( - deprecation_message(is_in_effect, depr.since, depr.note, kind, path), - deprecation_lint(is_in_effect), - ) -} - -pub fn early_report_deprecation( +pub fn early_report_macro_deprecation( lint_buffer: &mut LintBuffer, - message: String, - suggestion: Option<Symbol>, - lint: &'static Lint, + depr: &Deprecation, span: Span, node_id: NodeId, + path: String, ) { if span.in_derive_expansion() { return; } - let diag = BuiltinLintDiag::DeprecatedMacro(suggestion, span); - lint_buffer.buffer_lint_with_diagnostic(lint, node_id, span, message, diag); + let is_in_effect = depr.is_in_effect(); + let diag = BuiltinLintDiag::DeprecatedMacro { + suggestion: depr.suggestion, + suggestion_span: span, + note: depr.note, + path, + since_kind: deprecated_since_kind(is_in_effect, depr.since.clone()), + }; + lint_buffer.buffer_lint(deprecation_lint(is_in_effect), node_id, span, diag); } fn late_report_deprecation( tcx: TyCtxt<'_>, - message: String, - suggestion: Option<Symbol>, - lint: &'static Lint, + depr: &Deprecation, span: Span, method_span: Option<Span>, hir_id: HirId, @@ -217,13 +234,26 @@ fn late_report_deprecation( if span.in_derive_expansion() { return; } + + let def_path = with_no_trimmed_paths!(tcx.def_path_str(def_id)); + let def_kind = tcx.def_descr(def_id); + let is_in_effect = depr.is_in_effect(); + let method_span = method_span.unwrap_or(span); - tcx.node_span_lint(lint, hir_id, method_span, message, |diag| { - if let hir::Node::Expr(_) = tcx.hir_node(hir_id) { - let kind = tcx.def_descr(def_id); - deprecation_suggestion(diag, kind, suggestion, method_span); - } - }); + let suggestion = + if let hir::Node::Expr(_) = tcx.hir_node(hir_id) { depr.suggestion } else { None }; + let diag = Deprecated { + sub: suggestion.map(|suggestion| DeprecationSuggestion { + span: method_span, + kind: def_kind.to_owned(), + suggestion, + }), + kind: def_kind.to_owned(), + path: def_path, + note: depr.note, + since_kind: deprecated_since_kind(is_in_effect, depr.since), + }; + tcx.emit_node_span_lint(deprecation_lint(is_in_effect), hir_id, method_span, diag); } /// Result of `TyCtxt::eval_stability`. @@ -352,28 +382,9 @@ impl<'tcx> TyCtxt<'tcx> { // Calculating message for lint involves calling `self.def_path_str`. // Which by default to calculate visible path will invoke expensive `visible_parent_map` query. // So we skip message calculation altogether, if lint is allowed. - let is_in_effect = depr_attr.is_in_effect(); - let lint = deprecation_lint(is_in_effect); + let lint = deprecation_lint(depr_attr.is_in_effect()); if self.lint_level_at_node(lint, id).0 != Level::Allow { - let def_path = with_no_trimmed_paths!(self.def_path_str(def_id)); - let def_kind = self.def_descr(def_id); - - late_report_deprecation( - self, - deprecation_message( - is_in_effect, - depr_attr.since, - depr_attr.note, - def_kind, - &def_path, - ), - depr_attr.suggestion, - lint, - span, - method_span, - id, - def_id, - ); + late_report_deprecation(self, depr_attr, span, method_span, id, def_id); } } }; diff --git a/compiler/rustc_middle/src/mir/tcx.rs b/compiler/rustc_middle/src/mir/tcx.rs index c191de45e70..fbc7d3af0d7 100644 --- a/compiler/rustc_middle/src/mir/tcx.rs +++ b/compiler/rustc_middle/src/mir/tcx.rs @@ -295,7 +295,7 @@ impl BorrowKind { } impl BinOp { - pub fn to_hir_binop(self) -> hir::BinOpKind { + pub(crate) fn to_hir_binop(self) -> hir::BinOpKind { match self { // HIR `+`/`-`/`*` can map to either of these MIR BinOp, depending // on whether overflow checks are enabled or not. diff --git a/compiler/rustc_middle/src/query/on_disk_cache.rs b/compiler/rustc_middle/src/query/on_disk_cache.rs index 2dcb58729ff..941911c2230 100644 --- a/compiler/rustc_middle/src/query/on_disk_cache.rs +++ b/compiler/rustc_middle/src/query/on_disk_cache.rs @@ -154,24 +154,25 @@ impl EncodedSourceFileId { impl<'sess> OnDiskCache<'sess> { /// Creates a new `OnDiskCache` instance from the serialized data in `data`. - pub fn new(sess: &'sess Session, data: Mmap, start_pos: usize) -> Self { - debug_assert!(sess.opts.incremental.is_some()); - - // Wrap in a scope so we can borrow `data`. - let footer: Footer = { - let mut decoder = MemDecoder::new(&data, start_pos); - - // Decode the *position* of the footer, which can be found in the - // last 8 bytes of the file. - let footer_pos = decoder - .with_position(decoder.len() - IntEncodedWithFixedSize::ENCODED_SIZE, |decoder| { - IntEncodedWithFixedSize::decode(decoder).0 as usize - }); - // Decode the file footer, which contains all the lookup tables, etc. - decoder.with_position(footer_pos, |decoder| decode_tagged(decoder, TAG_FILE_FOOTER)) - }; + /// + /// The serialized cache has some basic integrity checks, if those checks indicate that the + /// on-disk data is corrupt, an error is returned. + pub fn new(sess: &'sess Session, data: Mmap, start_pos: usize) -> Result<Self, ()> { + assert!(sess.opts.incremental.is_some()); + + let mut decoder = MemDecoder::new(&data, start_pos)?; + + // Decode the *position* of the footer, which can be found in the + // last 8 bytes of the file. + let footer_pos = decoder + .with_position(decoder.len() - IntEncodedWithFixedSize::ENCODED_SIZE, |decoder| { + IntEncodedWithFixedSize::decode(decoder).0 as usize + }); + // Decode the file footer, which contains all the lookup tables, etc. + let footer: Footer = + decoder.with_position(footer_pos, |decoder| decode_tagged(decoder, TAG_FILE_FOOTER)); - Self { + Ok(Self { serialized_data: RwLock::new(Some(data)), file_index_to_stable_id: footer.file_index_to_stable_id, file_index_to_file: Default::default(), @@ -184,7 +185,7 @@ impl<'sess> OnDiskCache<'sess> { expn_data: footer.expn_data, foreign_expn_data: footer.foreign_expn_data, hygiene_context: Default::default(), - } + }) } pub fn new_empty(source_map: &'sess SourceMap) -> Self { @@ -437,7 +438,8 @@ impl<'sess> OnDiskCache<'sess> { let serialized_data = self.serialized_data.read(); let mut decoder = CacheDecoder { tcx, - opaque: MemDecoder::new(serialized_data.as_deref().unwrap_or(&[]), pos.to_usize()), + opaque: MemDecoder::new(serialized_data.as_deref().unwrap_or(&[]), pos.to_usize()) + .unwrap(), source_map: self.source_map, file_index_to_file: &self.file_index_to_file, file_index_to_stable_id: &self.file_index_to_stable_id, @@ -558,7 +560,7 @@ impl<'a, 'tcx> TyDecoder for CacheDecoder<'a, 'tcx> { { debug_assert!(pos < self.opaque.len()); - let new_opaque = MemDecoder::new(self.opaque.data(), pos); + let new_opaque = self.opaque.split_at(pos); let old_opaque = mem::replace(&mut self.opaque, new_opaque); let r = f(self); self.opaque = old_opaque; diff --git a/compiler/rustc_middle/src/ty/codec.rs b/compiler/rustc_middle/src/ty/codec.rs index c0effe9804c..07652b47929 100644 --- a/compiler/rustc_middle/src/ty/codec.rs +++ b/compiler/rustc_middle/src/ty/codec.rs @@ -115,18 +115,11 @@ impl<'tcx, E: TyEncoder<I = TyCtxt<'tcx>>> Encodable<E> for Ty<'tcx> { } } -impl<'tcx, E: TyEncoder<I = TyCtxt<'tcx>>> Encodable<E> - for ty::Binder<'tcx, ty::PredicateKind<'tcx>> -{ - fn encode(&self, e: &mut E) { - self.bound_vars().encode(e); - encode_with_shorthand(e, &self.skip_binder(), TyEncoder::predicate_shorthands); - } -} - impl<'tcx, E: TyEncoder<I = TyCtxt<'tcx>>> Encodable<E> for ty::Predicate<'tcx> { fn encode(&self, e: &mut E) { - self.kind().encode(e); + let kind = self.kind(); + kind.bound_vars().encode(e); + encode_with_shorthand(e, &kind.skip_binder(), TyEncoder::predicate_shorthands); } } @@ -233,13 +226,11 @@ impl<'tcx, D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<D> for Ty<'tcx> { } } -impl<'tcx, D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<D> - for ty::Binder<'tcx, ty::PredicateKind<'tcx>> -{ - fn decode(decoder: &mut D) -> ty::Binder<'tcx, ty::PredicateKind<'tcx>> { +impl<'tcx, D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<D> for ty::Predicate<'tcx> { + fn decode(decoder: &mut D) -> ty::Predicate<'tcx> { let bound_vars = Decodable::decode(decoder); // Handle shorthands first, if we have a usize > 0x80. - ty::Binder::bind_with_vars( + let predicate_kind = ty::Binder::bind_with_vars( if decoder.positioned_at_shorthand() { let pos = decoder.read_usize(); assert!(pos >= SHORTHAND_OFFSET); @@ -250,13 +241,7 @@ impl<'tcx, D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<D> <ty::PredicateKind<'tcx> as Decodable<D>>::decode(decoder) }, bound_vars, - ) - } -} - -impl<'tcx, D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<D> for ty::Predicate<'tcx> { - fn decode(decoder: &mut D) -> ty::Predicate<'tcx> { - let predicate_kind = Decodable::decode(decoder); + ); decoder.interner().mk_predicate(predicate_kind) } } @@ -599,32 +584,3 @@ macro_rules! implement_ty_decoder { } } } - -macro_rules! impl_binder_encode_decode { - ($($t:ty),+ $(,)?) => { - $( - impl<'tcx, E: TyEncoder<I = TyCtxt<'tcx>>> Encodable<E> for ty::Binder<'tcx, $t> { - fn encode(&self, e: &mut E) { - self.bound_vars().encode(e); - self.as_ref().skip_binder().encode(e); - } - } - impl<'tcx, D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<D> for ty::Binder<'tcx, $t> { - fn decode(decoder: &mut D) -> Self { - let bound_vars = Decodable::decode(decoder); - ty::Binder::bind_with_vars(Decodable::decode(decoder), bound_vars) - } - } - )* - } -} - -impl_binder_encode_decode! { - &'tcx ty::List<Ty<'tcx>>, - ty::FnSig<'tcx>, - ty::Predicate<'tcx>, - ty::TraitPredicate<'tcx>, - ty::ExistentialPredicate<'tcx>, - ty::TraitRef<'tcx>, - ty::ExistentialTraitRef<'tcx>, -} diff --git a/compiler/rustc_middle/src/ty/context.rs b/compiler/rustc_middle/src/ty/context.rs index 8185c99c2fd..896114e2483 100644 --- a/compiler/rustc_middle/src/ty/context.rs +++ b/compiler/rustc_middle/src/ty/context.rs @@ -31,8 +31,7 @@ use crate::ty::{ self, AdtDef, AdtDefData, AdtKind, Binder, Clause, Clauses, Const, ConstData, GenericParamDefKind, ImplPolarity, List, ListWithCachedTypeInfo, ParamConst, ParamTy, Pattern, PatternKind, PolyExistentialPredicate, PolyFnSig, Predicate, PredicateKind, PredicatePolarity, - Region, RegionKind, ReprOptions, TraitObjectVisitor, Ty, TyKind, TyVid, TypeVisitable, - Visibility, + Region, RegionKind, ReprOptions, TraitObjectVisitor, Ty, TyKind, TyVid, Visibility, }; use crate::ty::{GenericArg, GenericArgs, GenericArgsRef}; use rustc_ast::{self as ast, attr}; @@ -96,9 +95,8 @@ impl<'tcx> Interner for TyCtxt<'tcx> { type GenericArg = ty::GenericArg<'tcx>; type Term = ty::Term<'tcx>; - type Binder<T: TypeVisitable<TyCtxt<'tcx>>> = Binder<'tcx, T>; - type BoundVars = &'tcx List<ty::BoundVariableKind>; - type BoundVar = ty::BoundVariableKind; + type BoundVarKinds = &'tcx List<ty::BoundVariableKind>; + type BoundVarKind = ty::BoundVariableKind; type CanonicalVars = CanonicalVarInfos<'tcx>; type PredefinedOpaques = solve::PredefinedOpaques<'tcx>; @@ -123,7 +121,6 @@ impl<'tcx> Interner for TyCtxt<'tcx> { type Abi = abi::Abi; type Const = ty::Const<'tcx>; - type AliasConst = ty::UnevaluatedConst<'tcx>; type PlaceholderConst = ty::PlaceholderConst; type ParamConst = ty::ParamConst; type BoundConst = ty::BoundVar; @@ -138,15 +135,7 @@ impl<'tcx> Interner for TyCtxt<'tcx> { type ParamEnv = ty::ParamEnv<'tcx>; type Predicate = Predicate<'tcx>; - type TraitPredicate = ty::TraitPredicate<'tcx>; - type RegionOutlivesPredicate = ty::RegionOutlivesPredicate<'tcx>; - type TypeOutlivesPredicate = ty::TypeOutlivesPredicate<'tcx>; - type ProjectionPredicate = ty::ProjectionPredicate<'tcx>; - type NormalizesTo = ty::NormalizesTo<'tcx>; - type SubtypePredicate = ty::SubtypePredicate<'tcx>; - - type CoercePredicate = ty::CoercePredicate<'tcx>; - type ClosureKind = ty::ClosureKind; + type Clause = Clause<'tcx>; type Clauses = ty::Clauses<'tcx>; @@ -245,6 +234,10 @@ impl<'tcx> rustc_type_ir::inherent::Abi<TyCtxt<'tcx>> for abi::Abi { } impl<'tcx> rustc_type_ir::inherent::Safety<TyCtxt<'tcx>> for hir::Safety { + fn is_safe(self) -> bool { + matches!(self, hir::Safety::Safe) + } + fn prefix_str(self) -> &'static str { self.prefix_str() } diff --git a/compiler/rustc_middle/src/ty/generic_args.rs b/compiler/rustc_middle/src/ty/generic_args.rs index 3d263e62de6..cb11bb3ef16 100644 --- a/compiler/rustc_middle/src/ty/generic_args.rs +++ b/compiler/rustc_middle/src/ty/generic_args.rs @@ -51,6 +51,14 @@ impl<'tcx> rustc_type_ir::inherent::GenericArgs<TyCtxt<'tcx>> for ty::GenericArg fn identity_for_item(tcx: TyCtxt<'tcx>, def_id: DefId) -> ty::GenericArgsRef<'tcx> { GenericArgs::identity_for_item(tcx, def_id) } + + fn extend_with_error( + tcx: TyCtxt<'tcx>, + def_id: DefId, + original_args: &[ty::GenericArg<'tcx>], + ) -> ty::GenericArgsRef<'tcx> { + ty::GenericArgs::extend_with_error(tcx, def_id, original_args) + } } impl<'tcx> rustc_type_ir::inherent::IntoKind for GenericArg<'tcx> { diff --git a/compiler/rustc_middle/src/ty/mod.rs b/compiler/rustc_middle/src/ty/mod.rs index 8bb19bc85ac..f27409894fa 100644 --- a/compiler/rustc_middle/src/ty/mod.rs +++ b/compiler/rustc_middle/src/ty/mod.rs @@ -1814,6 +1814,11 @@ impl<'tcx> TyCtxt<'tcx> { self.get_attrs(did, attr).next().is_some() } + /// Determines whether an item is annotated with a multi-segement attribute + pub fn has_attrs_with_path(self, did: impl Into<DefId>, attrs: &[Symbol]) -> bool { + self.get_attrs_by_path(did.into(), attrs).next().is_some() + } + /// Returns `true` if this is an `auto trait`. pub fn trait_is_auto(self, trait_def_id: DefId) -> bool { self.trait_def(trait_def_id).has_auto_impl diff --git a/compiler/rustc_middle/src/ty/predicate.rs b/compiler/rustc_middle/src/ty/predicate.rs index be91249a25f..293cc0a7eca 100644 --- a/compiler/rustc_middle/src/ty/predicate.rs +++ b/compiler/rustc_middle/src/ty/predicate.rs @@ -1,15 +1,13 @@ use rustc_data_structures::captures::Captures; use rustc_data_structures::intern::Interned; use rustc_hir::def_id::DefId; -use rustc_macros::{ - extension, HashStable, Lift, TyDecodable, TyEncodable, TypeFoldable, TypeVisitable, -}; +use rustc_macros::{extension, HashStable}; use rustc_type_ir as ir; use std::cmp::Ordering; use crate::ty::{ - self, Binder, DebruijnIndex, EarlyBinder, PredicatePolarity, Term, Ty, TyCtxt, TypeFlags, - Upcast, UpcastFrom, WithCachedTypeInfo, + self, DebruijnIndex, EarlyBinder, PredicatePolarity, Ty, TyCtxt, TypeFlags, Upcast, UpcastFrom, + WithCachedTypeInfo, }; pub type TraitRef<'tcx> = ir::TraitRef<TyCtxt<'tcx>>; @@ -24,6 +22,15 @@ pub type PredicateKind<'tcx> = ir::PredicateKind<TyCtxt<'tcx>>; pub type NormalizesTo<'tcx> = ir::NormalizesTo<TyCtxt<'tcx>>; pub type CoercePredicate<'tcx> = ir::CoercePredicate<TyCtxt<'tcx>>; pub type SubtypePredicate<'tcx> = ir::SubtypePredicate<TyCtxt<'tcx>>; +pub type OutlivesPredicate<'tcx, T> = ir::OutlivesPredicate<TyCtxt<'tcx>, T>; +pub type RegionOutlivesPredicate<'tcx> = OutlivesPredicate<'tcx, ty::Region<'tcx>>; +pub type TypeOutlivesPredicate<'tcx> = OutlivesPredicate<'tcx, Ty<'tcx>>; +pub type PolyTraitPredicate<'tcx> = ty::Binder<'tcx, TraitPredicate<'tcx>>; +pub type PolyRegionOutlivesPredicate<'tcx> = ty::Binder<'tcx, RegionOutlivesPredicate<'tcx>>; +pub type PolyTypeOutlivesPredicate<'tcx> = ty::Binder<'tcx, TypeOutlivesPredicate<'tcx>>; +pub type PolySubtypePredicate<'tcx> = ty::Binder<'tcx, SubtypePredicate<'tcx>>; +pub type PolyCoercePredicate<'tcx> = ty::Binder<'tcx, CoercePredicate<'tcx>>; +pub type PolyProjectionPredicate<'tcx> = ty::Binder<'tcx, ProjectionPredicate<'tcx>>; /// A statement that can be proven by a trait solver. This includes things that may /// show up in where clauses, such as trait predicates and projection predicates, @@ -155,6 +162,8 @@ pub struct Clause<'tcx>( pub(super) Interned<'tcx, WithCachedTypeInfo<ty::Binder<'tcx, PredicateKind<'tcx>>>>, ); +impl<'tcx> rustc_type_ir::inherent::Clause<TyCtxt<'tcx>> for Clause<'tcx> {} + impl<'tcx> Clause<'tcx> { pub fn as_predicate(self) -> Predicate<'tcx> { Predicate(self.0) @@ -231,34 +240,6 @@ impl<'tcx> ExistentialPredicate<'tcx> { pub type PolyExistentialPredicate<'tcx> = ty::Binder<'tcx, ExistentialPredicate<'tcx>>; -impl<'tcx> PolyExistentialPredicate<'tcx> { - /// Given an existential predicate like `?Self: PartialEq<u32>` (e.g., derived from `dyn PartialEq<u32>`), - /// and a concrete type `self_ty`, returns a full predicate where the existentially quantified variable `?Self` - /// has been replaced with `self_ty` (e.g., `self_ty: PartialEq<u32>`, in our example). - pub fn with_self_ty(&self, tcx: TyCtxt<'tcx>, self_ty: Ty<'tcx>) -> ty::Clause<'tcx> { - match self.skip_binder() { - ExistentialPredicate::Trait(tr) => { - self.rebind(tr).with_self_ty(tcx, self_ty).upcast(tcx) - } - ExistentialPredicate::Projection(p) => { - self.rebind(p.with_self_ty(tcx, self_ty)).upcast(tcx) - } - ExistentialPredicate::AutoTrait(did) => { - let generics = tcx.generics_of(did); - let trait_ref = if generics.own_params.len() == 1 { - ty::TraitRef::new(tcx, did, [self_ty]) - } else { - // If this is an ill-formed auto trait, then synthesize - // new error args for the missing generics. - let err_args = ty::GenericArgs::extend_with_error(tcx, did, &[self_ty.into()]); - ty::TraitRef::new(tcx, did, err_args) - }; - self.rebind(trait_ref).upcast(tcx) - } - } - } -} - impl<'tcx> ty::List<ty::PolyExistentialPredicate<'tcx>> { /// Returns the "principal `DefId`" of this set of existential predicates. /// @@ -322,49 +303,9 @@ impl<'tcx> ty::List<ty::PolyExistentialPredicate<'tcx>> { } pub type PolyTraitRef<'tcx> = ty::Binder<'tcx, TraitRef<'tcx>>; - -impl<'tcx> PolyTraitRef<'tcx> { - pub fn self_ty(&self) -> ty::Binder<'tcx, Ty<'tcx>> { - self.map_bound_ref(|tr| tr.self_ty()) - } - - pub fn def_id(&self) -> DefId { - self.skip_binder().def_id - } -} - pub type PolyExistentialTraitRef<'tcx> = ty::Binder<'tcx, ExistentialTraitRef<'tcx>>; - -impl<'tcx> PolyExistentialTraitRef<'tcx> { - pub fn def_id(&self) -> DefId { - self.skip_binder().def_id - } - - /// Object types don't have a self type specified. Therefore, when - /// we convert the principal trait-ref into a normal trait-ref, - /// you must give *some* self type. A common choice is `mk_err()` - /// or some placeholder type. - pub fn with_self_ty(&self, tcx: TyCtxt<'tcx>, self_ty: Ty<'tcx>) -> ty::PolyTraitRef<'tcx> { - self.map_bound(|trait_ref| trait_ref.with_self_ty(tcx, self_ty)) - } -} - pub type PolyExistentialProjection<'tcx> = ty::Binder<'tcx, ExistentialProjection<'tcx>>; -impl<'tcx> PolyExistentialProjection<'tcx> { - pub fn with_self_ty( - &self, - tcx: TyCtxt<'tcx>, - self_ty: Ty<'tcx>, - ) -> ty::PolyProjectionPredicate<'tcx> { - self.map_bound(|p| p.with_self_ty(tcx, self_ty)) - } - - pub fn item_def_id(&self) -> DefId { - self.skip_binder().def_id - } -} - impl<'tcx> Clause<'tcx> { /// Performs a instantiation suitable for going from a /// poly-trait-ref to supertraits that must hold if that @@ -471,73 +412,6 @@ impl<'tcx> Clause<'tcx> { } } -pub type PolyTraitPredicate<'tcx> = ty::Binder<'tcx, TraitPredicate<'tcx>>; - -impl<'tcx> PolyTraitPredicate<'tcx> { - pub fn def_id(self) -> DefId { - // Ok to skip binder since trait `DefId` does not care about regions. - self.skip_binder().def_id() - } - - pub fn self_ty(self) -> ty::Binder<'tcx, Ty<'tcx>> { - self.map_bound(|trait_ref| trait_ref.self_ty()) - } - - #[inline] - pub fn polarity(self) -> PredicatePolarity { - self.skip_binder().polarity - } -} - -/// `A: B` -#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug, TyEncodable, TyDecodable)] -#[derive(HashStable, TypeFoldable, TypeVisitable, Lift)] -pub struct OutlivesPredicate<A, B>(pub A, pub B); -pub type RegionOutlivesPredicate<'tcx> = OutlivesPredicate<ty::Region<'tcx>, ty::Region<'tcx>>; -pub type TypeOutlivesPredicate<'tcx> = OutlivesPredicate<Ty<'tcx>, ty::Region<'tcx>>; -pub type PolyRegionOutlivesPredicate<'tcx> = ty::Binder<'tcx, RegionOutlivesPredicate<'tcx>>; -pub type PolyTypeOutlivesPredicate<'tcx> = ty::Binder<'tcx, TypeOutlivesPredicate<'tcx>>; - -pub type PolySubtypePredicate<'tcx> = ty::Binder<'tcx, SubtypePredicate<'tcx>>; - -pub type PolyCoercePredicate<'tcx> = ty::Binder<'tcx, CoercePredicate<'tcx>>; - -pub type PolyProjectionPredicate<'tcx> = Binder<'tcx, ProjectionPredicate<'tcx>>; - -impl<'tcx> PolyProjectionPredicate<'tcx> { - /// Returns the `DefId` of the trait of the associated item being projected. - #[inline] - pub fn trait_def_id(&self, tcx: TyCtxt<'tcx>) -> DefId { - self.skip_binder().projection_term.trait_def_id(tcx) - } - - /// Get the [PolyTraitRef] required for this projection to be well formed. - /// Note that for generic associated types the predicates of the associated - /// type also need to be checked. - #[inline] - pub fn required_poly_trait_ref(&self, tcx: TyCtxt<'tcx>) -> PolyTraitRef<'tcx> { - // Note: unlike with `TraitRef::to_poly_trait_ref()`, - // `self.0.trait_ref` is permitted to have escaping regions. - // This is because here `self` has a `Binder` and so does our - // return value, so we are preserving the number of binding - // levels. - self.map_bound(|predicate| predicate.projection_term.trait_ref(tcx)) - } - - pub fn term(&self) -> Binder<'tcx, Term<'tcx>> { - self.map_bound(|predicate| predicate.term) - } - - /// The `DefId` of the `TraitItem` for the associated type. - /// - /// Note that this is not the `DefId` of the `TraitRef` containing this - /// associated type, which is in `tcx.associated_item(projection_def_id()).container`. - pub fn projection_def_id(&self) -> DefId { - // Ok to skip binder since trait `DefId` does not care about regions. - self.skip_binder().projection_term.def_id - } -} - pub trait ToPolyTraitRef<'tcx> { fn to_poly_trait_ref(&self) -> PolyTraitRef<'tcx>; } @@ -554,8 +428,8 @@ impl<'tcx> UpcastFrom<TyCtxt<'tcx>, PredicateKind<'tcx>> for Predicate<'tcx> { } } -impl<'tcx> UpcastFrom<TyCtxt<'tcx>, Binder<'tcx, PredicateKind<'tcx>>> for Predicate<'tcx> { - fn upcast_from(from: Binder<'tcx, PredicateKind<'tcx>>, tcx: TyCtxt<'tcx>) -> Self { +impl<'tcx> UpcastFrom<TyCtxt<'tcx>, ty::Binder<'tcx, PredicateKind<'tcx>>> for Predicate<'tcx> { + fn upcast_from(from: ty::Binder<'tcx, PredicateKind<'tcx>>, tcx: TyCtxt<'tcx>) -> Self { tcx.mk_predicate(from) } } @@ -566,8 +440,8 @@ impl<'tcx> UpcastFrom<TyCtxt<'tcx>, ClauseKind<'tcx>> for Predicate<'tcx> { } } -impl<'tcx> UpcastFrom<TyCtxt<'tcx>, Binder<'tcx, ClauseKind<'tcx>>> for Predicate<'tcx> { - fn upcast_from(from: Binder<'tcx, ClauseKind<'tcx>>, tcx: TyCtxt<'tcx>) -> Self { +impl<'tcx> UpcastFrom<TyCtxt<'tcx>, ty::Binder<'tcx, ClauseKind<'tcx>>> for Predicate<'tcx> { + fn upcast_from(from: ty::Binder<'tcx, ClauseKind<'tcx>>, tcx: TyCtxt<'tcx>) -> Self { tcx.mk_predicate(from.map_bound(PredicateKind::Clause)) } } @@ -580,12 +454,12 @@ impl<'tcx> UpcastFrom<TyCtxt<'tcx>, Clause<'tcx>> for Predicate<'tcx> { impl<'tcx> UpcastFrom<TyCtxt<'tcx>, ClauseKind<'tcx>> for Clause<'tcx> { fn upcast_from(from: ClauseKind<'tcx>, tcx: TyCtxt<'tcx>) -> Self { - tcx.mk_predicate(Binder::dummy(PredicateKind::Clause(from))).expect_clause() + tcx.mk_predicate(ty::Binder::dummy(PredicateKind::Clause(from))).expect_clause() } } -impl<'tcx> UpcastFrom<TyCtxt<'tcx>, Binder<'tcx, ClauseKind<'tcx>>> for Clause<'tcx> { - fn upcast_from(from: Binder<'tcx, ClauseKind<'tcx>>, tcx: TyCtxt<'tcx>) -> Self { +impl<'tcx> UpcastFrom<TyCtxt<'tcx>, ty::Binder<'tcx, ClauseKind<'tcx>>> for Clause<'tcx> { + fn upcast_from(from: ty::Binder<'tcx, ClauseKind<'tcx>>, tcx: TyCtxt<'tcx>) -> Self { tcx.mk_predicate(from.map_bound(|clause| PredicateKind::Clause(clause))).expect_clause() } } @@ -609,22 +483,22 @@ impl<'tcx> UpcastFrom<TyCtxt<'tcx>, TraitRef<'tcx>> for Clause<'tcx> { } } -impl<'tcx> UpcastFrom<TyCtxt<'tcx>, Binder<'tcx, TraitRef<'tcx>>> for Predicate<'tcx> { - fn upcast_from(from: Binder<'tcx, TraitRef<'tcx>>, tcx: TyCtxt<'tcx>) -> Self { +impl<'tcx> UpcastFrom<TyCtxt<'tcx>, ty::Binder<'tcx, TraitRef<'tcx>>> for Predicate<'tcx> { + fn upcast_from(from: ty::Binder<'tcx, TraitRef<'tcx>>, tcx: TyCtxt<'tcx>) -> Self { let pred: PolyTraitPredicate<'tcx> = from.upcast(tcx); pred.upcast(tcx) } } -impl<'tcx> UpcastFrom<TyCtxt<'tcx>, Binder<'tcx, TraitRef<'tcx>>> for Clause<'tcx> { - fn upcast_from(from: Binder<'tcx, TraitRef<'tcx>>, tcx: TyCtxt<'tcx>) -> Self { +impl<'tcx> UpcastFrom<TyCtxt<'tcx>, ty::Binder<'tcx, TraitRef<'tcx>>> for Clause<'tcx> { + fn upcast_from(from: ty::Binder<'tcx, TraitRef<'tcx>>, tcx: TyCtxt<'tcx>) -> Self { let pred: PolyTraitPredicate<'tcx> = from.upcast(tcx); pred.upcast(tcx) } } -impl<'tcx> UpcastFrom<TyCtxt<'tcx>, Binder<'tcx, TraitRef<'tcx>>> for PolyTraitPredicate<'tcx> { - fn upcast_from(from: Binder<'tcx, TraitRef<'tcx>>, _tcx: TyCtxt<'tcx>) -> Self { +impl<'tcx> UpcastFrom<TyCtxt<'tcx>, ty::Binder<'tcx, TraitRef<'tcx>>> for PolyTraitPredicate<'tcx> { + fn upcast_from(from: ty::Binder<'tcx, TraitRef<'tcx>>, _tcx: TyCtxt<'tcx>) -> Self { from.map_bound(|trait_ref| TraitPredicate { trait_ref, polarity: PredicatePolarity::Positive, @@ -664,10 +538,8 @@ impl<'tcx> UpcastFrom<TyCtxt<'tcx>, PolyRegionOutlivesPredicate<'tcx>> for Predi } } -impl<'tcx> UpcastFrom<TyCtxt<'tcx>, OutlivesPredicate<Ty<'tcx>, ty::Region<'tcx>>> - for Predicate<'tcx> -{ - fn upcast_from(from: OutlivesPredicate<Ty<'tcx>, ty::Region<'tcx>>, tcx: TyCtxt<'tcx>) -> Self { +impl<'tcx> UpcastFrom<TyCtxt<'tcx>, TypeOutlivesPredicate<'tcx>> for Predicate<'tcx> { + fn upcast_from(from: TypeOutlivesPredicate<'tcx>, tcx: TyCtxt<'tcx>) -> Self { ty::Binder::dummy(PredicateKind::Clause(ClauseKind::TypeOutlives(from))).upcast(tcx) } } diff --git a/compiler/rustc_middle/src/ty/print/pretty.rs b/compiler/rustc_middle/src/ty/print/pretty.rs index 0dbb17e9db4..a1ead1bb59f 100644 --- a/compiler/rustc_middle/src/ty/print/pretty.rs +++ b/compiler/rustc_middle/src/ty/print/pretty.rs @@ -2860,10 +2860,9 @@ where } } -impl<'tcx, T, U, P: PrettyPrinter<'tcx>> Print<'tcx, P> for ty::OutlivesPredicate<T, U> +impl<'tcx, T, P: PrettyPrinter<'tcx>> Print<'tcx, P> for ty::OutlivesPredicate<'tcx, T> where T: Print<'tcx, P>, - U: Print<'tcx, P>, { fn print(&self, cx: &mut P) -> Result<(), PrintError> { define_scoped_cx!(cx); @@ -2934,12 +2933,13 @@ impl<'tcx> ty::TraitRef<'tcx> { } } +#[extension(pub trait PrintPolyTraitRefExt<'tcx>)] impl<'tcx> ty::Binder<'tcx, ty::TraitRef<'tcx>> { - pub fn print_only_trait_path(self) -> ty::Binder<'tcx, TraitRefPrintOnlyTraitPath<'tcx>> { + fn print_only_trait_path(self) -> ty::Binder<'tcx, TraitRefPrintOnlyTraitPath<'tcx>> { self.map_bound(|tr| tr.print_only_trait_path()) } - pub fn print_trait_sugared(self) -> ty::Binder<'tcx, TraitRefPrintSugared<'tcx>> { + fn print_trait_sugared(self) -> ty::Binder<'tcx, TraitRefPrintSugared<'tcx>> { self.map_bound(|tr| tr.print_trait_sugared()) } } @@ -2960,8 +2960,9 @@ impl<'tcx> ty::TraitPredicate<'tcx> { } } +#[extension(pub trait PrintPolyTraitPredicateExt<'tcx>)] impl<'tcx> ty::PolyTraitPredicate<'tcx> { - pub fn print_modifiers_and_trait_path( + fn print_modifiers_and_trait_path( self, ) -> ty::Binder<'tcx, TraitPredPrintModifiersAndPath<'tcx>> { self.map_bound(TraitPredPrintModifiersAndPath) @@ -3014,21 +3015,7 @@ forward_display_to_print! { ty::Region<'tcx>, Ty<'tcx>, &'tcx ty::List<ty::PolyExistentialPredicate<'tcx>>, - ty::Const<'tcx>, - - // HACK(eddyb) these are exhaustive instead of generic, - // because `for<'tcx>` isn't possible yet. - ty::PolyExistentialProjection<'tcx>, - ty::PolyExistentialTraitRef<'tcx>, - ty::Binder<'tcx, ty::TraitRef<'tcx>>, - ty::Binder<'tcx, TraitRefPrintOnlyTraitPath<'tcx>>, - ty::Binder<'tcx, TraitRefPrintSugared<'tcx>>, - ty::Binder<'tcx, ty::FnSig<'tcx>>, - ty::Binder<'tcx, ty::TraitPredicate<'tcx>>, - ty::Binder<'tcx, TraitPredPrintModifiersAndPath<'tcx>>, - ty::Binder<'tcx, ty::ProjectionPredicate<'tcx>>, - ty::OutlivesPredicate<Ty<'tcx>, ty::Region<'tcx>>, - ty::OutlivesPredicate<ty::Region<'tcx>, ty::Region<'tcx>> + ty::Const<'tcx> } define_print! { diff --git a/compiler/rustc_middle/src/ty/region.rs b/compiler/rustc_middle/src/ty/region.rs index 551e2ea2295..d7da37385e1 100644 --- a/compiler/rustc_middle/src/ty/region.rs +++ b/compiler/rustc_middle/src/ty/region.rs @@ -384,6 +384,10 @@ impl<'tcx> rustc_type_ir::inherent::BoundVarLike<TyCtxt<'tcx>> for BoundRegion { fn var(self) -> BoundVar { self.var } + + fn assert_eq(self, var: ty::BoundVariableKind) { + assert_eq!(self.kind, var.expect_region()) + } } impl core::fmt::Debug for BoundRegion { diff --git a/compiler/rustc_middle/src/ty/structural_impls.rs b/compiler/rustc_middle/src/ty/structural_impls.rs index 81d92a2a448..af3aa3b56f7 100644 --- a/compiler/rustc_middle/src/ty/structural_impls.rs +++ b/compiler/rustc_middle/src/ty/structural_impls.rs @@ -387,38 +387,6 @@ impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for ty::AdtDef<'tcx> { } } -impl<'tcx, T: TypeFoldable<TyCtxt<'tcx>>> TypeFoldable<TyCtxt<'tcx>> for ty::Binder<'tcx, T> { - fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( - self, - folder: &mut F, - ) -> Result<Self, F::Error> { - folder.try_fold_binder(self) - } -} - -impl<'tcx, T: TypeVisitable<TyCtxt<'tcx>>> TypeVisitable<TyCtxt<'tcx>> for ty::Binder<'tcx, T> { - fn visit_with<V: TypeVisitor<TyCtxt<'tcx>>>(&self, visitor: &mut V) -> V::Result { - visitor.visit_binder(self) - } -} - -impl<'tcx, T: TypeFoldable<TyCtxt<'tcx>>> TypeSuperFoldable<TyCtxt<'tcx>> for ty::Binder<'tcx, T> { - fn try_super_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( - self, - folder: &mut F, - ) -> Result<Self, F::Error> { - self.try_map_bound(|ty| ty.try_fold_with(folder)) - } -} - -impl<'tcx, T: TypeVisitable<TyCtxt<'tcx>>> TypeSuperVisitable<TyCtxt<'tcx>> - for ty::Binder<'tcx, T> -{ - fn super_visit_with<V: TypeVisitor<TyCtxt<'tcx>>>(&self, visitor: &mut V) -> V::Result { - self.as_ref().skip_binder().visit_with(visitor) - } -} - impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for &'tcx ty::List<ty::PolyExistentialPredicate<'tcx>> { fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, diff --git a/compiler/rustc_middle/src/ty/sty.rs b/compiler/rustc_middle/src/ty/sty.rs index 2d9d178449e..40f3db89df5 100644 --- a/compiler/rustc_middle/src/ty/sty.rs +++ b/compiler/rustc_middle/src/ty/sty.rs @@ -3,17 +3,16 @@ #![allow(rustc::usage_of_ty_tykind)] use crate::infer::canonical::Canonical; -use crate::ty::visit::ValidateBoundVars; use crate::ty::InferTy::*; use crate::ty::{ self, AdtDef, BoundRegionKind, Discr, Region, Ty, TyCtxt, TypeFlags, TypeSuperVisitable, - TypeVisitable, TypeVisitableExt, TypeVisitor, + TypeVisitable, TypeVisitor, }; use crate::ty::{GenericArg, GenericArgs, GenericArgsRef}; use crate::ty::{List, ParamEnv}; use hir::def::{CtorKind, DefKind}; use rustc_data_structures::captures::Captures; -use rustc_errors::{DiagArgValue, ErrorGuaranteed, IntoDiagArg, MultiSpan}; +use rustc_errors::{ErrorGuaranteed, MultiSpan}; use rustc_hir as hir; use rustc_hir::def_id::DefId; use rustc_hir::LangItem; @@ -21,11 +20,11 @@ use rustc_macros::{HashStable, Lift, TyDecodable, TyEncodable, TypeFoldable}; use rustc_span::symbol::{sym, Symbol}; use rustc_span::{Span, DUMMY_SP}; use rustc_target::abi::{FieldIdx, VariantIdx, FIRST_VARIANT}; -use rustc_target::spec::abi::{self, Abi}; +use rustc_target::spec::abi; use std::assert_matches::debug_assert_matches; use std::borrow::Cow; use std::iter; -use std::ops::{ControlFlow, Deref, Range}; +use std::ops::{ControlFlow, Range}; use ty::util::IntTypeExt; use rustc_type_ir::TyKind::*; @@ -40,6 +39,7 @@ pub type TyKind<'tcx> = ir::TyKind<TyCtxt<'tcx>>; pub type TypeAndMut<'tcx> = ir::TypeAndMut<TyCtxt<'tcx>>; pub type AliasTy<'tcx> = ir::AliasTy<TyCtxt<'tcx>>; pub type FnSig<'tcx> = ir::FnSig<TyCtxt<'tcx>>; +pub type Binder<'tcx, T> = ir::Binder<TyCtxt<'tcx>, T>; pub trait Article { fn article(&self) -> &'static str; @@ -373,7 +373,7 @@ impl<'tcx> CoroutineClosureArgs<'tcx> { self.split().signature_parts_ty } - pub fn coroutine_closure_sig(self) -> ty::Binder<'tcx, CoroutineClosureSignature<'tcx>> { + pub fn coroutine_closure_sig(self) -> Binder<'tcx, CoroutineClosureSignature<'tcx>> { let interior = self.coroutine_witness_ty(); let ty::FnPtr(sig) = self.signature_parts_ty().kind() else { bug!() }; sig.map_bound(|sig| { @@ -401,6 +401,45 @@ impl<'tcx> CoroutineClosureArgs<'tcx> { pub fn coroutine_witness_ty(self) -> Ty<'tcx> { self.split().coroutine_witness_ty } + + pub fn has_self_borrows(&self) -> bool { + match self.coroutine_captures_by_ref_ty().kind() { + ty::FnPtr(sig) => sig + .skip_binder() + .visit_with(&mut HasRegionsBoundAt { binder: ty::INNERMOST }) + .is_break(), + ty::Error(_) => true, + _ => bug!(), + } + } +} +/// Unlike `has_escaping_bound_vars` or `outermost_exclusive_binder`, this will +/// detect only regions bound *at* the debruijn index. +struct HasRegionsBoundAt { + binder: ty::DebruijnIndex, +} +// FIXME: Could be optimized to not walk into components with no escaping bound vars. +impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for HasRegionsBoundAt { + type Result = ControlFlow<()>; + fn visit_binder<T: TypeVisitable<TyCtxt<'tcx>>>( + &mut self, + t: &ty::Binder<'tcx, T>, + ) -> Self::Result { + self.binder.shift_in(1); + t.super_visit_with(self)?; + self.binder.shift_out(1); + ControlFlow::Continue(()) + } + + fn visit_region(&mut self, r: ty::Region<'tcx>) -> Self::Result { + if let ty::ReBound(binder, _) = *r + && self.binder == binder + { + ControlFlow::Break(()) + } else { + ControlFlow::Continue(()) + } + } } #[derive(Copy, Clone, PartialEq, Eq, Debug, TypeFoldable, TypeVisitable)] @@ -898,203 +937,6 @@ impl BoundVariableKind { } } -/// Binder is a binder for higher-ranked lifetimes or types. It is part of the -/// compiler's representation for things like `for<'a> Fn(&'a isize)` -/// (which would be represented by the type `PolyTraitRef == -/// Binder<'tcx, TraitRef>`). Note that when we instantiate, -/// erase, or otherwise "discharge" these bound vars, we change the -/// type from `Binder<'tcx, T>` to just `T` (see -/// e.g., `liberate_late_bound_regions`). -/// -/// `Decodable` and `Encodable` are implemented for `Binder<T>` using the `impl_binder_encode_decode!` macro. -#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)] -#[derive(HashStable, Lift)] -pub struct Binder<'tcx, T> { - value: T, - bound_vars: &'tcx List<BoundVariableKind>, -} - -impl<'tcx, T> Binder<'tcx, T> -where - T: TypeVisitable<TyCtxt<'tcx>>, -{ - /// Wraps `value` in a binder, asserting that `value` does not - /// contain any bound vars that would be bound by the - /// binder. This is commonly used to 'inject' a value T into a - /// different binding level. - #[track_caller] - pub fn dummy(value: T) -> Binder<'tcx, T> { - assert!( - !value.has_escaping_bound_vars(), - "`{value:?}` has escaping bound vars, so it cannot be wrapped in a dummy binder." - ); - Binder { value, bound_vars: ty::List::empty() } - } - - pub fn bind_with_vars(value: T, bound_vars: &'tcx List<BoundVariableKind>) -> Binder<'tcx, T> { - if cfg!(debug_assertions) { - let mut validator = ValidateBoundVars::new(bound_vars); - value.visit_with(&mut validator); - } - Binder { value, bound_vars } - } -} - -impl<'tcx, T> rustc_type_ir::inherent::BoundVars<TyCtxt<'tcx>> for ty::Binder<'tcx, T> { - fn bound_vars(&self) -> &'tcx List<ty::BoundVariableKind> { - self.bound_vars - } - - fn has_no_bound_vars(&self) -> bool { - self.bound_vars.is_empty() - } -} - -impl<'tcx, T> Binder<'tcx, T> { - /// Skips the binder and returns the "bound" value. This is a - /// risky thing to do because it's easy to get confused about - /// De Bruijn indices and the like. It is usually better to - /// discharge the binder using `no_bound_vars` or - /// `instantiate_bound_regions` or something like - /// that. `skip_binder` is only valid when you are either - /// extracting data that has nothing to do with bound vars, you - /// are doing some sort of test that does not involve bound - /// regions, or you are being very careful about your depth - /// accounting. - /// - /// Some examples where `skip_binder` is reasonable: - /// - /// - extracting the `DefId` from a PolyTraitRef; - /// - comparing the self type of a PolyTraitRef to see if it is equal to - /// a type parameter `X`, since the type `X` does not reference any regions - pub fn skip_binder(self) -> T { - self.value - } - - pub fn bound_vars(&self) -> &'tcx List<BoundVariableKind> { - self.bound_vars - } - - pub fn as_ref(&self) -> Binder<'tcx, &T> { - Binder { value: &self.value, bound_vars: self.bound_vars } - } - - pub fn as_deref(&self) -> Binder<'tcx, &T::Target> - where - T: Deref, - { - Binder { value: &self.value, bound_vars: self.bound_vars } - } - - pub fn map_bound_ref<F, U: TypeVisitable<TyCtxt<'tcx>>>(&self, f: F) -> Binder<'tcx, U> - where - F: FnOnce(&T) -> U, - { - self.as_ref().map_bound(f) - } - - pub fn map_bound<F, U: TypeVisitable<TyCtxt<'tcx>>>(self, f: F) -> Binder<'tcx, U> - where - F: FnOnce(T) -> U, - { - let Binder { value, bound_vars } = self; - let value = f(value); - if cfg!(debug_assertions) { - let mut validator = ValidateBoundVars::new(bound_vars); - value.visit_with(&mut validator); - } - Binder { value, bound_vars } - } - - pub fn try_map_bound<F, U: TypeVisitable<TyCtxt<'tcx>>, E>( - self, - f: F, - ) -> Result<Binder<'tcx, U>, E> - where - F: FnOnce(T) -> Result<U, E>, - { - let Binder { value, bound_vars } = self; - let value = f(value)?; - if cfg!(debug_assertions) { - let mut validator = ValidateBoundVars::new(bound_vars); - value.visit_with(&mut validator); - } - Ok(Binder { value, bound_vars }) - } - - /// Wraps a `value` in a binder, using the same bound variables as the - /// current `Binder`. This should not be used if the new value *changes* - /// the bound variables. Note: the (old or new) value itself does not - /// necessarily need to *name* all the bound variables. - /// - /// This currently doesn't do anything different than `bind`, because we - /// don't actually track bound vars. However, semantically, it is different - /// because bound vars aren't allowed to change here, whereas they are - /// in `bind`. This may be (debug) asserted in the future. - pub fn rebind<U>(&self, value: U) -> Binder<'tcx, U> - where - U: TypeVisitable<TyCtxt<'tcx>>, - { - Binder::bind_with_vars(value, self.bound_vars) - } - - /// Unwraps and returns the value within, but only if it contains - /// no bound vars at all. (In other words, if this binder -- - /// and indeed any enclosing binder -- doesn't bind anything at - /// all.) Otherwise, returns `None`. - /// - /// (One could imagine having a method that just unwraps a single - /// binder, but permits late-bound vars bound by enclosing - /// binders, but that would require adjusting the debruijn - /// indices, and given the shallow binding structure we often use, - /// would not be that useful.) - pub fn no_bound_vars(self) -> Option<T> - where - T: TypeVisitable<TyCtxt<'tcx>>, - { - // `self.value` is equivalent to `self.skip_binder()` - if self.value.has_escaping_bound_vars() { None } else { Some(self.skip_binder()) } - } - - /// Splits the contents into two things that share the same binder - /// level as the original, returning two distinct binders. - /// - /// `f` should consider bound regions at depth 1 to be free, and - /// anything it produces with bound regions at depth 1 will be - /// bound in the resulting return values. - pub fn split<U, V, F>(self, f: F) -> (Binder<'tcx, U>, Binder<'tcx, V>) - where - F: FnOnce(T) -> (U, V), - { - let Binder { value, bound_vars } = self; - let (u, v) = f(value); - (Binder { value: u, bound_vars }, Binder { value: v, bound_vars }) - } -} - -impl<'tcx, T> Binder<'tcx, Option<T>> { - pub fn transpose(self) -> Option<Binder<'tcx, T>> { - let Binder { value, bound_vars } = self; - value.map(|value| Binder { value, bound_vars }) - } -} - -impl<'tcx, T: IntoIterator> Binder<'tcx, T> { - pub fn iter(self) -> impl Iterator<Item = ty::Binder<'tcx, T::Item>> { - let Binder { value, bound_vars } = self; - value.into_iter().map(|value| Binder { value, bound_vars }) - } -} - -impl<'tcx, T> IntoDiagArg for Binder<'tcx, T> -where - T: IntoDiagArg, -{ - fn into_diag_arg(self) -> DiagArgValue { - self.value.into_diag_arg() - } -} - #[derive(Copy, Clone, Debug, TypeFoldable, TypeVisitable)] pub struct GenSig<'tcx> { pub resume_ty: Ty<'tcx>, @@ -1103,48 +945,6 @@ pub struct GenSig<'tcx> { } pub type PolyFnSig<'tcx> = Binder<'tcx, FnSig<'tcx>>; - -impl<'tcx> PolyFnSig<'tcx> { - #[inline] - pub fn inputs(&self) -> Binder<'tcx, &'tcx [Ty<'tcx>]> { - self.map_bound_ref(|fn_sig| fn_sig.inputs()) - } - - #[inline] - #[track_caller] - pub fn input(&self, index: usize) -> ty::Binder<'tcx, Ty<'tcx>> { - self.map_bound_ref(|fn_sig| fn_sig.inputs()[index]) - } - - pub fn inputs_and_output(&self) -> ty::Binder<'tcx, &'tcx List<Ty<'tcx>>> { - self.map_bound_ref(|fn_sig| fn_sig.inputs_and_output) - } - - #[inline] - pub fn output(&self) -> ty::Binder<'tcx, Ty<'tcx>> { - self.map_bound_ref(|fn_sig| fn_sig.output()) - } - - pub fn c_variadic(&self) -> bool { - self.skip_binder().c_variadic - } - - pub fn safety(&self) -> hir::Safety { - self.skip_binder().safety - } - - pub fn abi(&self) -> abi::Abi { - self.skip_binder().abi - } - - pub fn is_fn_trait_compatible(&self) -> bool { - matches!( - self.skip_binder(), - ty::FnSig { safety: rustc_hir::Safety::Safe, abi: Abi::Rust, c_variadic: false, .. } - ) - } -} - pub type CanonicalPolyFnSig<'tcx> = Canonical<'tcx, Binder<'tcx, FnSig<'tcx>>>; #[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, TyEncodable, TyDecodable)] @@ -1203,6 +1003,10 @@ impl<'tcx> rustc_type_ir::inherent::BoundVarLike<TyCtxt<'tcx>> for BoundTy { fn var(self) -> BoundVar { self.var } + + fn assert_eq(self, var: ty::BoundVariableKind) { + assert_eq!(self.kind, var.expect_ty()) + } } #[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, TyEncodable, TyDecodable)] @@ -2001,7 +1805,7 @@ impl<'tcx> Ty<'tcx> { FnPtr(f) => *f, Error(_) => { // ignore errors (#54954) - ty::Binder::dummy(ty::FnSig { + Binder::dummy(ty::FnSig { inputs_and_output: ty::List::empty(), c_variadic: false, safety: hir::Safety::Safe, diff --git a/compiler/rustc_middle/src/ty/trait_def.rs b/compiler/rustc_middle/src/ty/trait_def.rs index c5b3de17bcb..cf1cbb93410 100644 --- a/compiler/rustc_middle/src/ty/trait_def.rs +++ b/compiler/rustc_middle/src/ty/trait_def.rs @@ -39,11 +39,16 @@ pub struct TraitDef { /// also have already switched to the new trait solver. pub is_coinductive: bool, - /// If `true`, then this trait has the `#[rustc_skip_array_during_method_dispatch]` + /// If `true`, then this trait has the `#[rustc_skip_during_method_dispatch(array)]` /// attribute, indicating that editions before 2021 should not consider this trait /// during method dispatch if the receiver is an array. pub skip_array_during_method_dispatch: bool, + /// If `true`, then this trait has the `#[rustc_skip_during_method_dispatch(boxed_slice)]` + /// attribute, indicating that editions before 2024 should not consider this trait + /// during method dispatch if the receiver is a boxed slice. + pub skip_boxed_slice_during_method_dispatch: bool, + /// Used to determine whether the standard library is allowed to specialize /// on this trait. pub specialization_kind: TraitSpecializationKind, diff --git a/compiler/rustc_middle/src/ty/visit.rs b/compiler/rustc_middle/src/ty/visit.rs index 218567bbd59..b1bbfd420e1 100644 --- a/compiler/rustc_middle/src/ty/visit.rs +++ b/compiler/rustc_middle/src/ty/visit.rs @@ -1,7 +1,6 @@ use crate::ty::{self, Binder, Ty, TyCtxt, TypeFlags}; use rustc_data_structures::fx::FxHashSet; -use rustc_data_structures::sso::SsoHashSet; use rustc_type_ir::fold::TypeFoldable; use std::ops::ControlFlow; @@ -145,103 +144,6 @@ impl<'tcx> TyCtxt<'tcx> { } } -pub struct ValidateBoundVars<'tcx> { - bound_vars: &'tcx ty::List<ty::BoundVariableKind>, - binder_index: ty::DebruijnIndex, - // We may encounter the same variable at different levels of binding, so - // this can't just be `Ty` - visited: SsoHashSet<(ty::DebruijnIndex, Ty<'tcx>)>, -} - -impl<'tcx> ValidateBoundVars<'tcx> { - pub fn new(bound_vars: &'tcx ty::List<ty::BoundVariableKind>) -> Self { - ValidateBoundVars { - bound_vars, - binder_index: ty::INNERMOST, - visited: SsoHashSet::default(), - } - } -} - -impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for ValidateBoundVars<'tcx> { - type Result = ControlFlow<()>; - - fn visit_binder<T: TypeVisitable<TyCtxt<'tcx>>>( - &mut self, - t: &Binder<'tcx, T>, - ) -> Self::Result { - self.binder_index.shift_in(1); - let result = t.super_visit_with(self); - self.binder_index.shift_out(1); - result - } - - fn visit_ty(&mut self, t: Ty<'tcx>) -> Self::Result { - if t.outer_exclusive_binder() < self.binder_index - || !self.visited.insert((self.binder_index, t)) - { - return ControlFlow::Break(()); - } - match *t.kind() { - ty::Bound(debruijn, bound_ty) if debruijn == self.binder_index => { - if self.bound_vars.len() <= bound_ty.var.as_usize() { - bug!("Not enough bound vars: {:?} not found in {:?}", t, self.bound_vars); - } - let list_var = self.bound_vars[bound_ty.var.as_usize()]; - match list_var { - ty::BoundVariableKind::Ty(kind) => { - if kind != bound_ty.kind { - bug!( - "Mismatched type kinds: {:?} doesn't var in list {:?}", - bound_ty.kind, - list_var - ); - } - } - _ => { - bug!("Mismatched bound variable kinds! Expected type, found {:?}", list_var) - } - } - } - - _ => (), - }; - - t.super_visit_with(self) - } - - fn visit_region(&mut self, r: ty::Region<'tcx>) -> Self::Result { - match *r { - ty::ReBound(index, br) if index == self.binder_index => { - if self.bound_vars.len() <= br.var.as_usize() { - bug!("Not enough bound vars: {:?} not found in {:?}", br, self.bound_vars); - } - let list_var = self.bound_vars[br.var.as_usize()]; - match list_var { - ty::BoundVariableKind::Region(kind) => { - if kind != br.kind { - bug!( - "Mismatched region kinds: {:?} doesn't match var ({:?}) in list ({:?})", - br.kind, - list_var, - self.bound_vars - ); - } - } - _ => bug!( - "Mismatched bound variable kinds! Expected region, found {:?}", - list_var - ), - } - } - - _ => (), - }; - - ControlFlow::Continue(()) - } -} - /// Collects all the late-bound regions at the innermost binding level /// into a hash set. struct LateBoundRegionsCollector { diff --git a/compiler/rustc_next_trait_solver/src/canonicalizer.rs b/compiler/rustc_next_trait_solver/src/canonicalizer.rs index 696639e9c1b..127ebde5fec 100644 --- a/compiler/rustc_next_trait_solver/src/canonicalizer.rs +++ b/compiler/rustc_next_trait_solver/src/canonicalizer.rs @@ -217,10 +217,9 @@ impl<Infcx: InferCtxtLike<Interner = I>, I: Interner> TypeFolder<I> self.infcx.interner() } - fn fold_binder<T>(&mut self, t: I::Binder<T>) -> I::Binder<T> + fn fold_binder<T>(&mut self, t: ty::Binder<I, T>) -> ty::Binder<I, T> where T: TypeFoldable<I>, - I::Binder<T>: TypeSuperFoldable<I>, { self.binder_index.shift_in(1); let t = t.super_fold_with(self); @@ -455,10 +454,9 @@ impl<I: Interner> TypeFolder<I> for RegionsToStatic<I> { self.interner } - fn fold_binder<T>(&mut self, t: I::Binder<T>) -> I::Binder<T> + fn fold_binder<T>(&mut self, t: ty::Binder<I, T>) -> ty::Binder<I, T> where T: TypeFoldable<I>, - I::Binder<T>: TypeSuperFoldable<I>, { self.binder.shift_in(1); let t = t.super_fold_with(self); diff --git a/compiler/rustc_parse/src/lexer/mod.rs b/compiler/rustc_parse/src/lexer/mod.rs index d2d200a91af..6eb8bed6a8c 100644 --- a/compiler/rustc_parse/src/lexer/mod.rs +++ b/compiler/rustc_parse/src/lexer/mod.rs @@ -370,11 +370,10 @@ impl<'psess, 'src> StringReader<'psess, 'src> { let content = self.str_from(content_start); if contains_text_flow_control_chars(content) { let span = self.mk_sp(start, self.pos); - self.psess.buffer_lint_with_diagnostic( + self.psess.buffer_lint( TEXT_DIRECTION_CODEPOINT_IN_COMMENT, span, ast::CRATE_NODE_ID, - "unicode codepoint changing visible direction of text present in comment", BuiltinLintDiag::UnicodeTextFlow(span, content.to_string()), ); } @@ -723,12 +722,11 @@ impl<'psess, 'src> StringReader<'psess, 'src> { self.dcx().emit_err(errors::UnknownPrefix { span: prefix_span, prefix, sugg }); } else { // Before Rust 2021, only emit a lint for migration. - self.psess.buffer_lint_with_diagnostic( + self.psess.buffer_lint( RUST_2021_PREFIXES_INCOMPATIBLE_SYNTAX, prefix_span, ast::CRATE_NODE_ID, - format!("prefix `{prefix}` is unknown"), - BuiltinLintDiag::ReservedPrefix(prefix_span), + BuiltinLintDiag::ReservedPrefix(prefix_span, prefix.to_string()), ); } } diff --git a/compiler/rustc_parse/src/parser/expr.rs b/compiler/rustc_parse/src/parser/expr.rs index d2d21624150..fd3f63a04de 100644 --- a/compiler/rustc_parse/src/parser/expr.rs +++ b/compiler/rustc_parse/src/parser/expr.rs @@ -1913,11 +1913,10 @@ impl<'a> Parser<'a> { | ExprKind::Block(_, None) ) { - self.psess.buffer_lint_with_diagnostic( + self.psess.buffer_lint( BREAK_WITH_LABEL_AND_LOOP, lo.to(expr.span), ast::CRATE_NODE_ID, - "this labeled break expression is easy to confuse with an unlabeled break with a labeled value expression", BuiltinLintDiag::BreakWithLabelAndLoop(expr.span), ); } diff --git a/compiler/rustc_parse/src/parser/item.rs b/compiler/rustc_parse/src/parser/item.rs index a46c104b6d9..f43ddadc2ea 100644 --- a/compiler/rustc_parse/src/parser/item.rs +++ b/compiler/rustc_parse/src/parser/item.rs @@ -58,9 +58,15 @@ impl<'a> Parser<'a> { let attrs = self.parse_inner_attributes()?; let post_attr_lo = self.token.span; - let mut items = ThinVec::new(); - while let Some(item) = self.parse_item(ForceCollect::No)? { - self.maybe_consume_incorrect_semicolon(Some(&item)); + let mut items: ThinVec<P<_>> = ThinVec::new(); + + // There shouldn't be any stray semicolons before or after items. + // `parse_item` consumes the appropriate semicolons so any leftover is an error. + loop { + while self.maybe_consume_incorrect_semicolon(items.last().map(|x| &**x)) {} // Eat all bad semicolons + let Some(item) = self.parse_item(ForceCollect::No)? else { + break; + }; items.push(item); } diff --git a/compiler/rustc_parse/src/parser/stmt.rs b/compiler/rustc_parse/src/parser/stmt.rs index 7424fbea9b0..be539d15386 100644 --- a/compiler/rustc_parse/src/parser/stmt.rs +++ b/compiler/rustc_parse/src/parser/stmt.rs @@ -15,7 +15,7 @@ use ast::Label; use rustc_ast as ast; use rustc_ast::ptr::P; use rustc_ast::token::{self, Delimiter, TokenKind}; -use rustc_ast::util::classify; +use rustc_ast::util::classify::{self, TrailingBrace}; use rustc_ast::{AttrStyle, AttrVec, LocalKind, MacCall, MacCallStmt, MacStmtStyle}; use rustc_ast::{Block, BlockCheckMode, Expr, ExprKind, HasAttrs, Local, Recovered, Stmt}; use rustc_ast::{StmtKind, DUMMY_NODE_ID}; @@ -407,18 +407,24 @@ impl<'a> Parser<'a> { fn check_let_else_init_trailing_brace(&self, init: &ast::Expr) { if let Some(trailing) = classify::expr_trailing_brace(init) { - let sugg = match &trailing.kind { - ExprKind::MacCall(mac) => errors::WrapInParentheses::MacroArgs { - left: mac.args.dspan.open, - right: mac.args.dspan.close, - }, - _ => errors::WrapInParentheses::Expression { - left: trailing.span.shrink_to_lo(), - right: trailing.span.shrink_to_hi(), - }, + let (span, sugg) = match trailing { + TrailingBrace::MacCall(mac) => ( + mac.span(), + errors::WrapInParentheses::MacroArgs { + left: mac.args.dspan.open, + right: mac.args.dspan.close, + }, + ), + TrailingBrace::Expr(expr) => ( + expr.span, + errors::WrapInParentheses::Expression { + left: expr.span.shrink_to_lo(), + right: expr.span.shrink_to_hi(), + }, + ), }; self.dcx().emit_err(errors::InvalidCurlyInLetElse { - span: trailing.span.with_lo(trailing.span.hi() - BytePos(1)), + span: span.with_lo(span.hi() - BytePos(1)), sugg, }); } diff --git a/compiler/rustc_parse/src/validate_attr.rs b/compiler/rustc_parse/src/validate_attr.rs index f88edf29dce..b91ef1ae1f3 100644 --- a/compiler/rustc_parse/src/validate_attr.rs +++ b/compiler/rustc_parse/src/validate_attr.rs @@ -10,6 +10,7 @@ use rustc_errors::{Applicability, FatalError, PResult}; use rustc_feature::{AttributeTemplate, BuiltinAttribute, BUILTIN_ATTRIBUTE_MAP}; use rustc_session::errors::report_lit_error; use rustc_session::lint::builtin::ILL_FORMED_ATTRIBUTE_INPUT; +use rustc_session::lint::BuiltinLintDiag; use rustc_session::parse::ParseSess; use rustc_span::{sym, Span, Symbol}; @@ -176,37 +177,26 @@ fn emit_malformed_attribute( }; let error_msg = format!("malformed `{name}` attribute input"); - let mut msg = "attribute must be of the form ".to_owned(); let mut suggestions = vec![]; - let mut first = true; let inner = if style == ast::AttrStyle::Inner { "!" } else { "" }; if template.word { - first = false; - let code = format!("#{inner}[{name}]"); - msg.push_str(&format!("`{code}`")); - suggestions.push(code); + suggestions.push(format!("#{inner}[{name}]")); } if let Some(descr) = template.list { - if !first { - msg.push_str(" or "); - } - first = false; - let code = format!("#{inner}[{name}({descr})]"); - msg.push_str(&format!("`{code}`")); - suggestions.push(code); + suggestions.push(format!("#{inner}[{name}({descr})]")); } if let Some(descr) = template.name_value_str { - if !first { - msg.push_str(" or "); - } - let code = format!("#{inner}[{name} = \"{descr}\"]"); - msg.push_str(&format!("`{code}`")); - suggestions.push(code); + suggestions.push(format!("#{inner}[{name} = \"{descr}\"]")); } - suggestions.sort(); if should_warn(name) { - psess.buffer_lint(ILL_FORMED_ATTRIBUTE_INPUT, span, ast::CRATE_NODE_ID, msg); + psess.buffer_lint( + ILL_FORMED_ATTRIBUTE_INPUT, + span, + ast::CRATE_NODE_ID, + BuiltinLintDiag::IllFormedAttributeInput { suggestions: suggestions.clone() }, + ); } else { + suggestions.sort(); psess .dcx .struct_span_err(span, error_msg) diff --git a/compiler/rustc_passes/messages.ftl b/compiler/rustc_passes/messages.ftl index 3deefcaa06c..d850644bb45 100644 --- a/compiler/rustc_passes/messages.ftl +++ b/compiler/rustc_passes/messages.ftl @@ -341,7 +341,7 @@ passes_implied_feature_not_exist = feature `{$implied_by}` implying `{$feature}` does not exist passes_incorrect_do_not_recommend_location = - `#[do_not_recommend]` can only be placed on trait implementations + `#[diagnostic::do_not_recommend]` can only be placed on trait implementations passes_incorrect_meta_item = expected a quoted string literal passes_incorrect_meta_item_suggestion = consider surrounding this with quotes diff --git a/compiler/rustc_passes/src/check_attr.rs b/compiler/rustc_passes/src/check_attr.rs index aadbd747313..1924533e280 100644 --- a/compiler/rustc_passes/src/check_attr.rs +++ b/compiler/rustc_passes/src/check_attr.rs @@ -42,12 +42,9 @@ use std::collections::hash_map::Entry; #[derive(LintDiagnostic)] #[diag(passes_diagnostic_diagnostic_on_unimplemented_only_for_traits)] -pub struct DiagnosticOnUnimplementedOnlyForTraits; +struct DiagnosticOnUnimplementedOnlyForTraits; -pub(crate) fn target_from_impl_item<'tcx>( - tcx: TyCtxt<'tcx>, - impl_item: &hir::ImplItem<'_>, -) -> Target { +fn target_from_impl_item<'tcx>(tcx: TyCtxt<'tcx>, impl_item: &hir::ImplItem<'_>) -> Target { match impl_item.kind { hir::ImplItemKind::Const(..) => Target::AssocConst, hir::ImplItemKind::Fn(..) => { @@ -99,7 +96,7 @@ struct CheckAttrVisitor<'tcx> { } impl<'tcx> CheckAttrVisitor<'tcx> { - pub fn dcx(&self) -> &'tcx DiagCtxt { + fn dcx(&self) -> &'tcx DiagCtxt { self.tcx.dcx() } @@ -116,92 +113,96 @@ impl<'tcx> CheckAttrVisitor<'tcx> { let mut seen = FxHashMap::default(); let attrs = self.tcx.hir().attrs(hir_id); for attr in attrs { - if attr.path_matches(&[sym::diagnostic, sym::on_unimplemented]) { - self.check_diagnostic_on_unimplemented(attr.span, hir_id, target); - } - match attr.name_or_empty() { - sym::do_not_recommend => self.check_do_not_recommend(attr.span, target), - sym::inline => self.check_inline(hir_id, attr, span, target), - sym::coverage => self.check_coverage(hir_id, attr, span, target), - sym::non_exhaustive => self.check_non_exhaustive(hir_id, attr, span, target), - sym::marker => self.check_marker(hir_id, attr, span, target), - sym::target_feature => self.check_target_feature(hir_id, attr, span, target, attrs), - sym::thread_local => self.check_thread_local(attr, span, target), - sym::track_caller => { + match attr.path().as_slice() { + [sym::diagnostic, sym::do_not_recommend] => { + self.check_do_not_recommend(attr.span, hir_id, target) + } + [sym::diagnostic, sym::on_unimplemented] => { + self.check_diagnostic_on_unimplemented(attr.span, hir_id, target) + } + [sym::inline] => self.check_inline(hir_id, attr, span, target), + [sym::coverage] => self.check_coverage(hir_id, attr, span, target), + [sym::non_exhaustive] => self.check_non_exhaustive(hir_id, attr, span, target), + [sym::marker] => self.check_marker(hir_id, attr, span, target), + [sym::target_feature] => { + self.check_target_feature(hir_id, attr, span, target, attrs) + } + [sym::thread_local] => self.check_thread_local(attr, span, target), + [sym::track_caller] => { self.check_track_caller(hir_id, attr.span, attrs, span, target) } - sym::doc => self.check_doc_attrs( + [sym::doc] => self.check_doc_attrs( attr, hir_id, target, &mut specified_inline, &mut doc_aliases, ), - sym::no_link => self.check_no_link(hir_id, attr, span, target), - sym::export_name => self.check_export_name(hir_id, attr, span, target), - sym::rustc_layout_scalar_valid_range_start - | sym::rustc_layout_scalar_valid_range_end => { + [sym::no_link] => self.check_no_link(hir_id, attr, span, target), + [sym::export_name] => self.check_export_name(hir_id, attr, span, target), + [sym::rustc_layout_scalar_valid_range_start] + | [sym::rustc_layout_scalar_valid_range_end] => { self.check_rustc_layout_scalar_valid_range(attr, span, target) } - sym::allow_internal_unstable => { + [sym::allow_internal_unstable] => { self.check_allow_internal_unstable(hir_id, attr, span, target, attrs) } - sym::debugger_visualizer => self.check_debugger_visualizer(attr, target), - sym::rustc_allow_const_fn_unstable => { + [sym::debugger_visualizer] => self.check_debugger_visualizer(attr, target), + [sym::rustc_allow_const_fn_unstable] => { self.check_rustc_allow_const_fn_unstable(hir_id, attr, span, target) } - sym::rustc_std_internal_symbol => { + [sym::rustc_std_internal_symbol] => { self.check_rustc_std_internal_symbol(attr, span, target) } - sym::naked => self.check_naked(hir_id, attr, span, target), - sym::rustc_never_returns_null_ptr => { + [sym::naked] => self.check_naked(hir_id, attr, span, target), + [sym::rustc_never_returns_null_ptr] => { self.check_applied_to_fn_or_method(hir_id, attr, span, target) } - sym::rustc_legacy_const_generics => { + [sym::rustc_legacy_const_generics] => { self.check_rustc_legacy_const_generics(hir_id, attr, span, target, item) } - sym::rustc_lint_query_instability => { + [sym::rustc_lint_query_instability] => { self.check_rustc_lint_query_instability(hir_id, attr, span, target) } - sym::rustc_lint_diagnostics => { + [sym::rustc_lint_diagnostics] => { self.check_rustc_lint_diagnostics(hir_id, attr, span, target) } - sym::rustc_lint_opt_ty => self.check_rustc_lint_opt_ty(attr, span, target), - sym::rustc_lint_opt_deny_field_access => { + [sym::rustc_lint_opt_ty] => self.check_rustc_lint_opt_ty(attr, span, target), + [sym::rustc_lint_opt_deny_field_access] => { self.check_rustc_lint_opt_deny_field_access(attr, span, target) } - sym::rustc_clean - | sym::rustc_dirty - | sym::rustc_if_this_changed - | sym::rustc_then_this_would_need => self.check_rustc_dirty_clean(attr), - sym::rustc_coinductive - | sym::rustc_must_implement_one_of - | sym::rustc_deny_explicit_impl - | sym::const_trait => self.check_must_be_applied_to_trait(attr, span, target), - sym::cmse_nonsecure_entry => { + [sym::rustc_clean] + | [sym::rustc_dirty] + | [sym::rustc_if_this_changed] + | [sym::rustc_then_this_would_need] => self.check_rustc_dirty_clean(attr), + [sym::rustc_coinductive] + | [sym::rustc_must_implement_one_of] + | [sym::rustc_deny_explicit_impl] + | [sym::const_trait] => self.check_must_be_applied_to_trait(attr, span, target), + [sym::cmse_nonsecure_entry] => { self.check_cmse_nonsecure_entry(hir_id, attr, span, target) } - sym::collapse_debuginfo => self.check_collapse_debuginfo(attr, span, target), - sym::must_not_suspend => self.check_must_not_suspend(attr, span, target), - sym::must_use => self.check_must_use(hir_id, attr, target), - sym::rustc_pass_by_value => self.check_pass_by_value(attr, span, target), - sym::rustc_allow_incoherent_impl => { + [sym::collapse_debuginfo] => self.check_collapse_debuginfo(attr, span, target), + [sym::must_not_suspend] => self.check_must_not_suspend(attr, span, target), + [sym::must_use] => self.check_must_use(hir_id, attr, target), + [sym::rustc_pass_by_value] => self.check_pass_by_value(attr, span, target), + [sym::rustc_allow_incoherent_impl] => { self.check_allow_incoherent_impl(attr, span, target) } - sym::rustc_has_incoherent_inherent_impls => { + [sym::rustc_has_incoherent_inherent_impls] => { self.check_has_incoherent_inherent_impls(attr, span, target) } - sym::ffi_pure => self.check_ffi_pure(attr.span, attrs, target), - sym::ffi_const => self.check_ffi_const(attr.span, target), - sym::rustc_const_unstable - | sym::rustc_const_stable - | sym::unstable - | sym::stable - | sym::rustc_allowed_through_unstable_modules - | sym::rustc_promotable => self.check_stability_promotable(attr, target), - sym::link_ordinal => self.check_link_ordinal(attr, span, target), - sym::rustc_confusables => self.check_confusables(attr, target), - sym::rustc_safe_intrinsic => { + [sym::ffi_pure] => self.check_ffi_pure(attr.span, attrs, target), + [sym::ffi_const] => self.check_ffi_const(attr.span, target), + [sym::rustc_const_unstable] + | [sym::rustc_const_stable] + | [sym::unstable] + | [sym::stable] + | [sym::rustc_allowed_through_unstable_modules] + | [sym::rustc_promotable] => self.check_stability_promotable(attr, target), + [sym::link_ordinal] => self.check_link_ordinal(attr, span, target), + [sym::rustc_confusables] => self.check_confusables(attr, target), + [sym::rustc_safe_intrinsic] => { self.check_rustc_safe_intrinsic(hir_id, attr, span, target) } _ => true, @@ -293,18 +294,26 @@ impl<'tcx> CheckAttrVisitor<'tcx> { ); } - /// Checks if `#[do_not_recommend]` is applied on a trait impl. - fn check_do_not_recommend(&self, attr_span: Span, target: Target) -> bool { - if let Target::Impl = target { - true - } else { - self.dcx().emit_err(errors::IncorrectDoNotRecommendLocation { span: attr_span }); - false + /// Checks if `#[diagnostic::do_not_recommend]` is applied on a trait impl. + fn check_do_not_recommend(&self, attr_span: Span, hir_id: HirId, target: Target) -> bool { + if !matches!(target, Target::Impl) { + self.tcx.emit_node_span_lint( + UNKNOWN_OR_MALFORMED_DIAGNOSTIC_ATTRIBUTES, + hir_id, + attr_span, + errors::IncorrectDoNotRecommendLocation, + ); } + true } /// Checks if `#[diagnostic::on_unimplemented]` is applied to a trait definition - fn check_diagnostic_on_unimplemented(&self, attr_span: Span, hir_id: HirId, target: Target) { + fn check_diagnostic_on_unimplemented( + &self, + attr_span: Span, + hir_id: HirId, + target: Target, + ) -> bool { if !matches!(target, Target::Trait) { self.tcx.emit_node_span_lint( UNKNOWN_OR_MALFORMED_DIAGNOSTIC_ATTRIBUTES, @@ -313,6 +322,7 @@ impl<'tcx> CheckAttrVisitor<'tcx> { DiagnosticOnUnimplementedOnlyForTraits, ); } + true } /// Checks if an `#[inline]` is applied to a function or a closure. Returns `true` if valid. diff --git a/compiler/rustc_passes/src/errors.rs b/compiler/rustc_passes/src/errors.rs index b8586e7e974..180552785fe 100644 --- a/compiler/rustc_passes/src/errors.rs +++ b/compiler/rustc_passes/src/errors.rs @@ -17,12 +17,9 @@ use rustc_span::{Span, Symbol, DUMMY_SP}; use crate::check_attr::ProcMacroKind; use crate::lang_items::Duplicate; -#[derive(Diagnostic)] +#[derive(LintDiagnostic)] #[diag(passes_incorrect_do_not_recommend_location)] -pub struct IncorrectDoNotRecommendLocation { - #[primary_span] - pub span: Span, -} +pub struct IncorrectDoNotRecommendLocation; #[derive(LintDiagnostic)] #[diag(passes_outer_crate_level_attr)] diff --git a/compiler/rustc_passes/src/lang_items.rs b/compiler/rustc_passes/src/lang_items.rs index a5fa94faead..b3722e99e16 100644 --- a/compiler/rustc_passes/src/lang_items.rs +++ b/compiler/rustc_passes/src/lang_items.rs @@ -149,8 +149,9 @@ impl<'ast, 'tcx> LanguageItemCollector<'ast, 'tcx> { } }; - // When there's a duplicate lang item, something went very wrong and there's no value in recovering or doing anything. - // Give the user the one message to let them debug the mess they created and then wish them farewell. + // When there's a duplicate lang item, something went very wrong and there's no value + // in recovering or doing anything. Give the user the one message to let them debug the + // mess they created and then wish them farewell. self.tcx.dcx().emit_fatal(DuplicateLangItem { local_span: item_span, lang_item_name, diff --git a/compiler/rustc_query_system/src/dep_graph/serialized.rs b/compiler/rustc_query_system/src/dep_graph/serialized.rs index b426bb888f4..8e91d9dd60b 100644 --- a/compiler/rustc_query_system/src/dep_graph/serialized.rs +++ b/compiler/rustc_query_system/src/dep_graph/serialized.rs @@ -182,15 +182,13 @@ impl SerializedDepGraph { pub fn decode<D: Deps>(d: &mut MemDecoder<'_>) -> Arc<SerializedDepGraph> { // The last 16 bytes are the node count and edge count. debug!("position: {:?}", d.position()); - let (node_count, edge_count, graph_size) = - d.with_position(d.len() - 3 * IntEncodedWithFixedSize::ENCODED_SIZE, |d| { + let (node_count, edge_count) = + d.with_position(d.len() - 2 * IntEncodedWithFixedSize::ENCODED_SIZE, |d| { debug!("position: {:?}", d.position()); let node_count = IntEncodedWithFixedSize::decode(d).0 as usize; let edge_count = IntEncodedWithFixedSize::decode(d).0 as usize; - let graph_size = IntEncodedWithFixedSize::decode(d).0 as usize; - (node_count, edge_count, graph_size) + (node_count, edge_count) }); - assert_eq!(d.len(), graph_size); debug!("position: {:?}", d.position()); debug!(?node_count, ?edge_count); @@ -606,8 +604,6 @@ impl<D: Deps> EncoderState<D> { debug!("position: {:?}", encoder.position()); IntEncodedWithFixedSize(node_count).encode(&mut encoder); IntEncodedWithFixedSize(edge_count).encode(&mut encoder); - let graph_size = encoder.position() + IntEncodedWithFixedSize::ENCODED_SIZE; - IntEncodedWithFixedSize(graph_size as u64).encode(&mut encoder); debug!("position: {:?}", encoder.position()); // Drop the encoder so that nothing is written after the counts. let result = encoder.finish(); diff --git a/compiler/rustc_resolve/src/check_unused.rs b/compiler/rustc_resolve/src/check_unused.rs index 180e7f6def3..fc3669fecc2 100644 --- a/compiler/rustc_resolve/src/check_unused.rs +++ b/compiler/rustc_resolve/src/check_unused.rs @@ -32,7 +32,7 @@ use rustc_ast as ast; use rustc_ast::visit::{self, Visitor}; use rustc_data_structures::fx::{FxHashMap, FxIndexMap, FxIndexSet}; use rustc_data_structures::unord::UnordSet; -use rustc_errors::{pluralize, MultiSpan}; +use rustc_errors::MultiSpan; use rustc_hir::def::{DefKind, Res}; use rustc_session::lint::builtin::{MACRO_USE_EXTERN_CRATE, UNUSED_EXTERN_CRATES}; use rustc_session::lint::builtin::{UNUSED_IMPORTS, UNUSED_QUALIFICATIONS}; @@ -151,11 +151,10 @@ impl<'a, 'b, 'tcx> UnusedImportCheckVisitor<'a, 'b, 'tcx> { // We do this in any edition. if warn_if_unused { if let Some(&span) = maybe_unused_extern_crates.get(&extern_crate.id) { - self.r.lint_buffer.buffer_lint_with_diagnostic( + self.r.lint_buffer.buffer_lint( UNUSED_EXTERN_CRATES, extern_crate.id, span, - "unused extern crate", BuiltinLintDiag::UnusedExternCrate { removal_span: extern_crate.span_with_attributes, }, @@ -204,11 +203,10 @@ impl<'a, 'b, 'tcx> UnusedImportCheckVisitor<'a, 'b, 'tcx> { .span .find_ancestor_inside(extern_crate.span) .unwrap_or(extern_crate.ident.span); - self.r.lint_buffer.buffer_lint_with_diagnostic( + self.r.lint_buffer.buffer_lint( UNUSED_EXTERN_CRATES, extern_crate.id, extern_crate.span, - "`extern crate` is not idiomatic in the new edition", BuiltinLintDiag::ExternCrateNotIdiomatic { vis_span, ident_span }, ); } @@ -394,10 +392,7 @@ impl Resolver<'_, '_> { MACRO_USE_EXTERN_CRATE, import.root_id, import.span, - "deprecated `#[macro_use]` attribute used to \ - import macros should be replaced at use sites \ - with a `use` item to import the macro \ - instead", + BuiltinLintDiag::MacroUseDeprecated, ); } } @@ -414,8 +409,12 @@ impl Resolver<'_, '_> { } } ImportKind::MacroUse { .. } => { - let msg = "unused `#[macro_use]` import"; - self.lint_buffer.buffer_lint(UNUSED_IMPORTS, import.root_id, import.span, msg); + self.lint_buffer.buffer_lint( + UNUSED_IMPORTS, + import.root_id, + import.span, + BuiltinLintDiag::UnusedMacroUse, + ); } _ => {} } @@ -434,20 +433,12 @@ impl Resolver<'_, '_> { visitor.report_unused_extern_crate_items(maybe_unused_extern_crates); for unused in visitor.unused_imports.values() { - let mut fixes = Vec::new(); - let spans = match calc_unused_spans(unused, &unused.use_tree, unused.use_tree_id) { - UnusedSpanResult::Used => continue, - UnusedSpanResult::Unused { spans, remove } => { - fixes.push((remove, String::new())); - spans - } - UnusedSpanResult::PartialUnused { spans, remove } => { - for fix in &remove { - fixes.push((*fix, String::new())); - } - spans - } - }; + let (spans, remove_spans) = + match calc_unused_spans(unused, &unused.use_tree, unused.use_tree_id) { + UnusedSpanResult::Used => continue, + UnusedSpanResult::Unused { spans, remove } => (spans, vec![remove]), + UnusedSpanResult::PartialUnused { spans, remove } => (spans, remove), + }; let ms = MultiSpan::from_spans(spans); @@ -459,23 +450,8 @@ impl Resolver<'_, '_> { .collect::<Vec<String>>(); span_snippets.sort(); - let msg = format!( - "unused import{}{}", - pluralize!(ms.primary_spans().len()), - if !span_snippets.is_empty() { - format!(": {}", span_snippets.join(", ")) - } else { - String::new() - } - ); - - let fix_msg = if fixes.len() == 1 && fixes[0].0 == unused.item_span { - "remove the whole `use` item" - } else if ms.primary_spans().len() > 1 { - "remove the unused imports" - } else { - "remove the unused import" - }; + let remove_whole_use = remove_spans.len() == 1 && remove_spans[0] == unused.item_span; + let num_to_remove = ms.primary_spans().len(); // If we are in the `--test` mode, suppress a help that adds the `#[cfg(test)]` // attribute; however, if not, suggest adding the attribute. There is no way to @@ -501,12 +477,17 @@ impl Resolver<'_, '_> { } }; - visitor.r.lint_buffer.buffer_lint_with_diagnostic( + visitor.r.lint_buffer.buffer_lint( UNUSED_IMPORTS, unused.use_tree_id, ms, - msg, - BuiltinLintDiag::UnusedImports(fix_msg.into(), fixes, test_module_span), + BuiltinLintDiag::UnusedImports { + remove_whole_use, + num_to_remove, + remove_spans, + test_module_span, + span_snippets, + }, ); } @@ -552,11 +533,10 @@ impl Resolver<'_, '_> { continue; } - self.lint_buffer.buffer_lint_with_diagnostic( + self.lint_buffer.buffer_lint( UNUSED_QUALIFICATIONS, unn_qua.node_id, unn_qua.path_span, - "unnecessary qualification", BuiltinLintDiag::UnusedQualifications { removal_span: unn_qua.removal_span }, ); } diff --git a/compiler/rustc_resolve/src/diagnostics.rs b/compiler/rustc_resolve/src/diagnostics.rs index b28312fa473..856cfbc01e8 100644 --- a/compiler/rustc_resolve/src/diagnostics.rs +++ b/compiler/rustc_resolve/src/diagnostics.rs @@ -128,13 +128,10 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { self.report_with_use_injections(krate); for &(span_use, span_def) in &self.macro_expanded_macro_export_errors { - let msg = "macro-expanded `macro_export` macros from the current crate \ - cannot be referred to by absolute paths"; - self.lint_buffer.buffer_lint_with_diagnostic( + self.lint_buffer.buffer_lint( MACRO_EXPANDED_MACRO_EXPORTS_ACCESSED_BY_ABSOLUTE_PATHS, CRATE_NODE_ID, span_use, - msg, BuiltinLintDiag::MacroExpandedMacroExportsAccessedByAbsolutePaths(span_def), ); } @@ -145,11 +142,10 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { let NameBindingKind::Import { import, .. } = ambiguity_error.b1.0.kind else { unreachable!() }; - self.lint_buffer.buffer_lint_with_diagnostic( + self.lint_buffer.buffer_lint( AMBIGUOUS_GLOB_IMPORTS, import.root_id, ambiguity_error.ident.span, - diag.msg.to_string(), BuiltinLintDiag::AmbiguousGlobImports { diag }, ); } else { @@ -526,12 +522,10 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { } let diag = BuiltinLintDiag::AbsPathWithModule(root_span); - self.lint_buffer.buffer_lint_with_diagnostic( + self.lint_buffer.buffer_lint( ABSOLUTE_PATHS_NOT_STARTING_WITH_CRATE, node_id, root_span, - "absolute paths must start with `self`, `super`, \ - `crate`, or an external crate name in the 2018 edition", diag, ); } diff --git a/compiler/rustc_resolve/src/ident.rs b/compiler/rustc_resolve/src/ident.rs index f88725830f1..57db765c07e 100644 --- a/compiler/rustc_resolve/src/ident.rs +++ b/compiler/rustc_resolve/src/ident.rs @@ -524,18 +524,15 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { match binding { Ok(binding) => { if let Some(lint_id) = derive_fallback_lint_id { - this.lint_buffer.buffer_lint_with_diagnostic( + this.lint_buffer.buffer_lint( PROC_MACRO_DERIVE_RESOLUTION_FALLBACK, lint_id, orig_ident.span, - format!( - "cannot find {} `{}` in this scope", - ns.descr(), - ident - ), - BuiltinLintDiag::ProcMacroDeriveResolutionFallback( - orig_ident.span, - ), + BuiltinLintDiag::ProcMacroDeriveResolutionFallback { + span: orig_ident.span, + ns, + ident, + }, ); } let misc_flags = if module == this.graph_root { diff --git a/compiler/rustc_resolve/src/imports.rs b/compiler/rustc_resolve/src/imports.rs index f53bcb0e9d0..51b87c5a9b0 100644 --- a/compiler/rustc_resolve/src/imports.rs +++ b/compiler/rustc_resolve/src/imports.rs @@ -619,11 +619,10 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { && binding.res() != Res::Err && exported_ambiguities.contains(&binding) { - self.lint_buffer.buffer_lint_with_diagnostic( + self.lint_buffer.buffer_lint( AMBIGUOUS_GLOB_REEXPORTS, import.root_id, import.root_span, - "ambiguous glob re-exports", BuiltinLintDiag::AmbiguousGlobReexports { name: key.ident.to_string(), namespace: key.ns.descr().to_string(), @@ -655,11 +654,10 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { && glob_binding.vis.is_public() && !binding.vis.is_public() { - self.lint_buffer.buffer_lint_with_diagnostic( + self.lint_buffer.buffer_lint( HIDDEN_GLOB_REEXPORTS, binding_id, binding.span, - "private item shadows public glob re-export", BuiltinLintDiag::HiddenGlobReexports { name: key.ident.name.to_string(), namespace: key.ns.descr().to_owned(), @@ -1015,17 +1013,13 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { && !max_vis.is_at_least(import_vis, self.tcx) { let def_id = self.local_def_id(id); - let msg = format!( - "glob import doesn't reexport anything with visibility `{}` because no imported item is public enough", - import_vis.to_string(def_id, self.tcx) - ); - self.lint_buffer.buffer_lint_with_diagnostic( + self.lint_buffer.buffer_lint( UNUSED_IMPORTS, id, import.span, - msg, BuiltinLintDiag::RedundantImportVisibility { max_vis: max_vis.to_string(def_id, self.tcx), + import_vis: import_vis.to_string(def_id, self.tcx), span: import.span, }, ); @@ -1252,16 +1246,11 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { if !any_successful_reexport { let (ns, binding) = reexport_error.unwrap(); if pub_use_of_private_extern_crate_hack(import, binding) { - let msg = format!( - "extern crate `{ident}` is private, and cannot be \ - re-exported (error E0365), consider declaring with \ - `pub`" - ); self.lint_buffer.buffer_lint( PUB_USE_OF_PRIVATE_EXTERN_CRATE, import_id, import.span, - msg, + BuiltinLintDiag::PrivateExternCrateReexport(ident), ); } else { if ns == TypeNS { @@ -1397,7 +1386,6 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { UNUSED_IMPORTS, id, import.span, - format!("the item `{source}` is imported redundantly"), BuiltinLintDiag::RedundantImport(redundant_spans, source), ); */ diff --git a/compiler/rustc_resolve/src/late.rs b/compiler/rustc_resolve/src/late.rs index 0f585aafdd5..d1d0e336cfe 100644 --- a/compiler/rustc_resolve/src/late.rs +++ b/compiler/rustc_resolve/src/late.rs @@ -24,7 +24,7 @@ use rustc_middle::middle::resolve_bound_vars::Set1; use rustc_middle::ty::DelegationFnSig; use rustc_middle::{bug, span_bug}; use rustc_session::config::{CrateType, ResolveDocLinks}; -use rustc_session::lint; +use rustc_session::lint::{self, BuiltinLintDiag}; use rustc_session::parse::feature_err; use rustc_span::source_map::{respan, Spanned}; use rustc_span::symbol::{kw, sym, Ident, Symbol}; @@ -1675,16 +1675,10 @@ impl<'a: 'ast, 'b, 'ast, 'tcx> LateResolutionVisitor<'a, 'b, 'ast, 'tcx> { return; } LifetimeRibKind::AnonymousWarn(node_id) => { - let msg = if elided { - "`&` without an explicit lifetime name cannot be used here" - } else { - "`'_` cannot be used here" - }; - self.r.lint_buffer.buffer_lint_with_diagnostic( + self.r.lint_buffer.buffer_lint( lint::builtin::ELIDED_LIFETIMES_IN_ASSOCIATED_CONSTANT, node_id, lifetime.ident.span, - msg, lint::BuiltinLintDiag::AssociatedConstElidedLifetime { elided, span: lifetime.ident.span, @@ -1966,11 +1960,10 @@ impl<'a: 'ast, 'b, 'ast, 'tcx> LateResolutionVisitor<'a, 'b, 'ast, 'tcx> { } if should_lint { - self.r.lint_buffer.buffer_lint_with_diagnostic( + self.r.lint_buffer.buffer_lint( lint::builtin::ELIDED_LIFETIMES_IN_PATHS, segment_id, elided_lifetime_span, - "hidden lifetime parameters in types are deprecated", lint::BuiltinLintDiag::ElidedLifetimesInPaths( expected_lifetimes, path_span, @@ -4822,7 +4815,12 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { late_resolution_visitor.resolve_doc_links(&krate.attrs, MaybeExported::Ok(CRATE_NODE_ID)); visit::walk_crate(&mut late_resolution_visitor, krate); for (id, span) in late_resolution_visitor.diag_metadata.unused_labels.iter() { - self.lint_buffer.buffer_lint(lint::builtin::UNUSED_LABELS, *id, *span, "unused label"); + self.lint_buffer.buffer_lint( + lint::builtin::UNUSED_LABELS, + *id, + *span, + BuiltinLintDiag::UnusedLabel, + ); } } } diff --git a/compiler/rustc_resolve/src/late/diagnostics.rs b/compiler/rustc_resolve/src/late/diagnostics.rs index 1958fdf1cbc..9daa22f89d2 100644 --- a/compiler/rustc_resolve/src/late/diagnostics.rs +++ b/compiler/rustc_resolve/src/late/diagnostics.rs @@ -17,6 +17,7 @@ use rustc_ast::{ }; use rustc_ast_pretty::pprust::where_bound_predicate_to_string; use rustc_data_structures::fx::FxHashSet; +use rustc_data_structures::fx::FxIndexSet; use rustc_errors::{ codes::*, pluralize, struct_span_code_err, Applicability, Diag, ErrorGuaranteed, MultiSpan, SuggestionStyle, @@ -31,7 +32,7 @@ use rustc_span::edit_distance::find_best_match_for_name; use rustc_span::edition::Edition; use rustc_span::hygiene::MacroKind; use rustc_span::symbol::{kw, sym, Ident, Symbol}; -use rustc_span::Span; +use rustc_span::{Span, DUMMY_SP}; use rustc_middle::ty; @@ -2651,15 +2652,15 @@ impl<'a: 'ast, 'ast, 'tcx> LateResolutionVisitor<'a, '_, 'ast, 'tcx> { let deletion_span = if param.bounds.is_empty() { deletion_span() } else { None }; - self.r.lint_buffer.buffer_lint_with_diagnostic( + self.r.lint_buffer.buffer_lint( lint::builtin::SINGLE_USE_LIFETIMES, param.id, param.ident.span, - format!("lifetime parameter `{}` only used once", param.ident), lint::BuiltinLintDiag::SingleUseLifetime { param_span: param.ident.span, use_span: Some((use_span, elidable)), deletion_span, + ident: param.ident, }, ); } @@ -2669,15 +2670,15 @@ impl<'a: 'ast, 'ast, 'tcx> LateResolutionVisitor<'a, '_, 'ast, 'tcx> { // if the lifetime originates from expanded code, we won't be able to remove it #104432 if deletion_span.is_some_and(|sp| !sp.in_derive_expansion()) { - self.r.lint_buffer.buffer_lint_with_diagnostic( + self.r.lint_buffer.buffer_lint( lint::builtin::UNUSED_LIFETIMES, param.id, param.ident.span, - format!("lifetime parameter `{}` never used", param.ident), lint::BuiltinLintDiag::SingleUseLifetime { param_span: param.ident.span, use_span: None, deletion_span, + ident: param.ident, }, ); } @@ -2714,8 +2715,17 @@ impl<'a: 'ast, 'ast, 'tcx> LateResolutionVisitor<'a, '_, 'ast, 'tcx> { self.suggest_introducing_lifetime( &mut err, Some(lifetime_ref.ident.name.as_str()), - |err, _, span, message, suggestion| { - err.span_suggestion(span, message, suggestion, Applicability::MaybeIncorrect); + |err, _, span, message, suggestion, span_suggs| { + err.multipart_suggestion_with_style( + message, + std::iter::once((span, suggestion)).chain(span_suggs.clone()).collect(), + Applicability::MaybeIncorrect, + if span_suggs.is_empty() { + SuggestionStyle::ShowCode + } else { + SuggestionStyle::ShowAlways + }, + ); true }, ); @@ -2726,13 +2736,20 @@ impl<'a: 'ast, 'ast, 'tcx> LateResolutionVisitor<'a, '_, 'ast, 'tcx> { &self, err: &mut Diag<'_>, name: Option<&str>, - suggest: impl Fn(&mut Diag<'_>, bool, Span, Cow<'static, str>, String) -> bool, + suggest: impl Fn( + &mut Diag<'_>, + bool, + Span, + Cow<'static, str>, + String, + Vec<(Span, String)>, + ) -> bool, ) { let mut suggest_note = true; for rib in self.lifetime_ribs.iter().rev() { let mut should_continue = true; match rib.kind { - LifetimeRibKind::Generics { binder: _, span, kind } => { + LifetimeRibKind::Generics { binder, span, kind } => { // Avoid suggesting placing lifetime parameters on constant items unless the relevant // feature is enabled. Suggest the parent item as a possible location if applicable. if let LifetimeBinderKind::ConstItem = kind @@ -2761,11 +2778,53 @@ impl<'a: 'ast, 'ast, 'tcx> LateResolutionVisitor<'a, '_, 'ast, 'tcx> { | LifetimeBinderKind::PolyTrait | LifetimeBinderKind::WhereBound ); + + let mut rm_inner_binders: FxIndexSet<Span> = Default::default(); let (span, sugg) = if span.is_empty() { + let mut binder_idents: FxIndexSet<Ident> = Default::default(); + binder_idents.insert(Ident::from_str(name.unwrap_or("'a"))); + + // We need to special case binders in the following situation: + // Change `T: for<'a> Trait<T> + 'b` to `for<'a, 'b> T: Trait<T> + 'b` + // T: for<'a> Trait<T> + 'b + // ^^^^^^^ remove existing inner binder `for<'a>` + // for<'a, 'b> T: Trait<T> + 'b + // ^^^^^^^^^^^ suggest outer binder `for<'a, 'b>` + if let LifetimeBinderKind::WhereBound = kind + && let Some(ast::WherePredicate::BoundPredicate( + ast::WhereBoundPredicate { bounded_ty, bounds, .. }, + )) = self.diag_metadata.current_where_predicate + && bounded_ty.id == binder + { + for bound in bounds { + if let ast::GenericBound::Trait(poly_trait_ref, _) = bound + && let span = poly_trait_ref + .span + .with_hi(poly_trait_ref.trait_ref.path.span.lo()) + && !span.is_empty() + { + rm_inner_binders.insert(span); + poly_trait_ref.bound_generic_params.iter().for_each(|v| { + binder_idents.insert(v.ident); + }); + } + } + } + + let binders_sugg = binder_idents.into_iter().enumerate().fold( + "".to_string(), + |mut binders, (i, x)| { + if i != 0 { + binders += ", "; + } + binders += x.as_str(); + binders + }, + ); let sugg = format!( "{}<{}>{}", if higher_ranked { "for" } else { "" }, - name.unwrap_or("'a"), + binders_sugg, if higher_ranked { " " } else { "" }, ); (span, sugg) @@ -2780,13 +2839,28 @@ impl<'a: 'ast, 'ast, 'tcx> LateResolutionVisitor<'a, '_, 'ast, 'tcx> { let sugg = format!("{}, ", name.unwrap_or("'a")); (span, sugg) }; + if higher_ranked { let message = Cow::from(format!( "consider making the {} lifetime-generic with a new `{}` lifetime", kind.descr(), name.unwrap_or("'a"), )); - should_continue = suggest(err, true, span, message, sugg); + should_continue = suggest( + err, + true, + span, + message, + sugg, + if !rm_inner_binders.is_empty() { + rm_inner_binders + .into_iter() + .map(|v| (v, "".to_string())) + .collect::<Vec<_>>() + } else { + vec![] + }, + ); err.note_once( "for more information on higher-ranked polymorphism, visit \ https://doc.rust-lang.org/nomicon/hrtb.html", @@ -2794,10 +2868,10 @@ impl<'a: 'ast, 'ast, 'tcx> LateResolutionVisitor<'a, '_, 'ast, 'tcx> { } else if let Some(name) = name { let message = Cow::from(format!("consider introducing lifetime `{name}` here")); - should_continue = suggest(err, false, span, message, sugg); + should_continue = suggest(err, false, span, message, sugg, vec![]); } else { let message = Cow::from("consider introducing a named lifetime parameter"); - should_continue = suggest(err, false, span, message, sugg); + should_continue = suggest(err, false, span, message, sugg, vec![]); } } LifetimeRibKind::Item | LifetimeRibKind::ConstParamTy => break, @@ -3033,11 +3107,11 @@ impl<'a: 'ast, 'ast, 'tcx> LateResolutionVisitor<'a, '_, 'ast, 'tcx> { self.suggest_introducing_lifetime( err, None, - |err, higher_ranked, span, message, intro_sugg| { + |err, higher_ranked, span, message, intro_sugg, _| { err.multipart_suggestion_verbose( message, std::iter::once((span, intro_sugg)) - .chain(spans_suggs.iter().cloned()) + .chain(spans_suggs.clone()) .collect(), Applicability::MaybeIncorrect, ); @@ -3161,11 +3235,11 @@ impl<'a: 'ast, 'ast, 'tcx> LateResolutionVisitor<'a, '_, 'ast, 'tcx> { self.suggest_introducing_lifetime( err, None, - |err, higher_ranked, span, message, intro_sugg| { + |err, higher_ranked, span, message, intro_sugg, _| { err.multipart_suggestion_verbose( message, std::iter::once((span, intro_sugg)) - .chain(spans_suggs.iter().cloned()) + .chain(spans_suggs.clone()) .collect(), Applicability::MaybeIncorrect, ); @@ -3309,7 +3383,6 @@ fn mk_where_bound_predicate( poly_trait_ref: &ast::PolyTraitRef, ty: &Ty, ) -> Option<ast::WhereBoundPredicate> { - use rustc_span::DUMMY_SP; let modified_segments = { let mut segments = path.segments.clone(); let [preceding @ .., second_last, last] = segments.as_mut_slice() else { diff --git a/compiler/rustc_resolve/src/lib.rs b/compiler/rustc_resolve/src/lib.rs index 01bcfec4bdc..f4c5ad8f672 100644 --- a/compiler/rustc_resolve/src/lib.rs +++ b/compiler/rustc_resolve/src/lib.rs @@ -51,7 +51,7 @@ use rustc_middle::ty::{self, DelegationFnSig, Feed, MainDefinition, RegisteredTo use rustc_middle::ty::{ResolverGlobalCtxt, ResolverOutputs, TyCtxt, TyCtxtFeed}; use rustc_query_system::ich::StableHashingContext; use rustc_session::lint::builtin::PRIVATE_MACRO_USE; -use rustc_session::lint::LintBuffer; +use rustc_session::lint::{BuiltinLintDiag, LintBuffer}; use rustc_span::hygiene::{ExpnId, LocalExpnId, MacroKind, SyntaxContext, Transparency}; use rustc_span::symbol::{kw, sym, Ident, Symbol}; use rustc_span::{Span, DUMMY_SP}; @@ -1860,8 +1860,12 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { } if let NameBindingKind::Import { import, binding } = used_binding.kind { if let ImportKind::MacroUse { warn_private: true } = import.kind { - let msg = format!("macro `{ident}` is private"); - self.lint_buffer().buffer_lint(PRIVATE_MACRO_USE, import.root_id, ident.span, msg); + self.lint_buffer().buffer_lint( + PRIVATE_MACRO_USE, + import.root_id, + ident.span, + BuiltinLintDiag::MacroIsPrivate(ident), + ); } // Avoid marking `extern crate` items that refer to a name from extern prelude, // but not introduce it, as used if they are accessed from lexical scope. diff --git a/compiler/rustc_resolve/src/macros.rs b/compiler/rustc_resolve/src/macros.rs index f8d245f94e5..268e7f06d04 100644 --- a/compiler/rustc_resolve/src/macros.rs +++ b/compiler/rustc_resolve/src/macros.rs @@ -315,7 +315,7 @@ impl<'a, 'tcx> ResolverExpand for Resolver<'a, 'tcx> { UNUSED_MACROS, node_id, ident.span, - format!("unused macro definition: `{}`", ident.name), + BuiltinLintDiag::UnusedMacroDefinition(ident.name), ); } for (&(def_id, arm_i), &(ident, rule_span)) in self.unused_macro_rules.iter() { @@ -328,7 +328,7 @@ impl<'a, 'tcx> ResolverExpand for Resolver<'a, 'tcx> { UNUSED_MACRO_RULES, node_id, rule_span, - format!("rule #{} of macro `{}` is never used", arm_i + 1, ident.name), + BuiltinLintDiag::MacroRuleNeverUsed(arm_i, ident.name), ); } } @@ -552,14 +552,25 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { // We are trying to avoid reporting this error if other related errors were reported. if res != Res::Err && inner_attr && !self.tcx.features().custom_inner_attributes { - let msg = match res { - Res::Def(..) => "inner macro attributes are unstable", - Res::NonMacroAttr(..) => "custom inner attributes are unstable", + let is_macro = match res { + Res::Def(..) => true, + Res::NonMacroAttr(..) => false, _ => unreachable!(), }; if soft_custom_inner_attributes_gate { - self.tcx.sess.psess.buffer_lint(SOFT_UNSTABLE, path.span, node_id, msg); + self.tcx.sess.psess.buffer_lint( + SOFT_UNSTABLE, + path.span, + node_id, + BuiltinLintDiag::InnerAttributeUnstable { is_macro }, + ); } else { + // FIXME: deduplicate with rustc_lint (`BuiltinLintDiag::InnerAttributeUnstable`) + let msg = if is_macro { + "inner macro attributes are unstable" + } else { + "custom inner attributes are unstable" + }; feature_err(&self.tcx.sess, sym::custom_inner_attributes, path.span, msg).emit(); } } @@ -567,22 +578,20 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { if res == Res::NonMacroAttr(NonMacroAttrKind::Tool) && let [namespace, attribute, ..] = &*path.segments && namespace.ident.name == sym::diagnostic - && attribute.ident.name != sym::on_unimplemented + && !(attribute.ident.name == sym::on_unimplemented + || (attribute.ident.name == sym::do_not_recommend + && self.tcx.features().do_not_recommend)) { let distance = edit_distance(attribute.ident.name.as_str(), sym::on_unimplemented.as_str(), 5); - let help = if distance.is_some() { - BuiltinLintDiag::MaybeTypo { span: attribute.span(), name: sym::on_unimplemented } - } else { - BuiltinLintDiag::Normal - }; - self.tcx.sess.psess.buffer_lint_with_diagnostic( + let typo_name = distance.map(|_| sym::on_unimplemented); + + self.tcx.sess.psess.buffer_lint( UNKNOWN_OR_MALFORMED_DIAGNOSTIC_ATTRIBUTES, attribute.span(), node_id, - "unknown diagnostic attribute", - help, + BuiltinLintDiag::UnknownDiagnosticAttribute { span: attribute.span(), typo_name }, ); } @@ -782,11 +791,10 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { .invocation_parents .get(&parent_scope.expansion) .map_or(ast::CRATE_NODE_ID, |id| self.def_id_to_node_id[id.0]); - self.lint_buffer.buffer_lint_with_diagnostic( + self.lint_buffer.buffer_lint( LEGACY_DERIVE_HELPERS, node_id, ident.span, - "derive helper attribute is used before it is introduced", BuiltinLintDiag::LegacyDeriveHelpers(binding.span), ); } @@ -836,8 +844,17 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { let allowed_by_implication = implied_by.is_some_and(|feature| is_allowed(feature)); if !is_allowed(feature) && !allowed_by_implication { let lint_buffer = &mut self.lint_buffer; - let soft_handler = - |lint, span, msg: String| lint_buffer.buffer_lint(lint, node_id, span, msg); + let soft_handler = |lint, span, msg: String| { + lint_buffer.buffer_lint( + lint, + node_id, + span, + BuiltinLintDiag::UnstableFeature( + // FIXME make this translatable + msg.into(), + ), + ) + }; stability::report_unstable( self.tcx.sess, feature, @@ -853,14 +870,12 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { } if let Some(depr) = &ext.deprecation { let path = pprust::path_to_string(path); - let (message, lint) = stability::deprecation_message_and_lint(depr, "macro", &path); - stability::early_report_deprecation( + stability::early_report_macro_deprecation( &mut self.lint_buffer, - message, - depr.suggestion, - lint, + depr, span, node_id, + path, ); } } diff --git a/compiler/rustc_serialize/src/opaque.rs b/compiler/rustc_serialize/src/opaque.rs index eec83c02d35..1dcb69920d7 100644 --- a/compiler/rustc_serialize/src/opaque.rs +++ b/compiler/rustc_serialize/src/opaque.rs @@ -17,6 +17,8 @@ use crate::int_overflow::DebugStrictAdd; pub type FileEncodeResult = Result<usize, (PathBuf, io::Error)>; +pub const MAGIC_END_BYTES: &[u8] = b"rust-end-file"; + /// The size of the buffer in `FileEncoder`. const BUF_SIZE: usize = 8192; @@ -181,6 +183,7 @@ impl FileEncoder { } pub fn finish(&mut self) -> FileEncodeResult { + self.write_all(MAGIC_END_BYTES); self.flush(); #[cfg(debug_assertions)] { @@ -261,15 +264,18 @@ pub struct MemDecoder<'a> { impl<'a> MemDecoder<'a> { #[inline] - pub fn new(data: &'a [u8], position: usize) -> MemDecoder<'a> { + pub fn new(data: &'a [u8], position: usize) -> Result<MemDecoder<'a>, ()> { + let data = data.strip_suffix(MAGIC_END_BYTES).ok_or(())?; let Range { start, end } = data.as_ptr_range(); - MemDecoder { start, current: data[position..].as_ptr(), end, _marker: PhantomData } + Ok(MemDecoder { start, current: data[position..].as_ptr(), end, _marker: PhantomData }) } #[inline] - pub fn data(&self) -> &'a [u8] { - // SAFETY: This recovers the original slice, only using members we never modify. - unsafe { std::slice::from_raw_parts(self.start, self.len()) } + pub fn split_at(&self, position: usize) -> MemDecoder<'a> { + assert!(position <= self.len()); + // SAFETY: We checked above that this offset is within the original slice + let current = unsafe { self.start.add(position) }; + MemDecoder { start: self.start, current, end: self.end, _marker: PhantomData } } #[inline] diff --git a/compiler/rustc_serialize/tests/leb128.rs b/compiler/rustc_serialize/tests/leb128.rs index dc9b32a968b..fafe4b91a95 100644 --- a/compiler/rustc_serialize/tests/leb128.rs +++ b/compiler/rustc_serialize/tests/leb128.rs @@ -1,4 +1,6 @@ use rustc_serialize::leb128::*; +use rustc_serialize::opaque::MemDecoder; +use rustc_serialize::opaque::MAGIC_END_BYTES; use rustc_serialize::Decoder; macro_rules! impl_test_unsigned_leb128 { @@ -25,13 +27,15 @@ macro_rules! impl_test_unsigned_leb128 { let n = $write_fn_name(&mut buf, x); stream.extend(&buf[..n]); } + let stream_end = stream.len(); + stream.extend(MAGIC_END_BYTES); - let mut decoder = rustc_serialize::opaque::MemDecoder::new(&stream, 0); + let mut decoder = MemDecoder::new(&stream, 0).unwrap(); for &expected in &values { let actual = $read_fn_name(&mut decoder); assert_eq!(expected, actual); } - assert_eq!(stream.len(), decoder.position()); + assert_eq!(stream_end, decoder.position()); } }; } @@ -72,13 +76,15 @@ macro_rules! impl_test_signed_leb128 { let n = $write_fn_name(&mut buf, x); stream.extend(&buf[..n]); } + let stream_end = stream.len(); + stream.extend(MAGIC_END_BYTES); - let mut decoder = rustc_serialize::opaque::MemDecoder::new(&stream, 0); + let mut decoder = MemDecoder::new(&stream, 0).unwrap(); for &expected in &values { let actual = $read_fn_name(&mut decoder); assert_eq!(expected, actual); } - assert_eq!(stream.len(), decoder.position()); + assert_eq!(stream_end, decoder.position()); } }; } diff --git a/compiler/rustc_serialize/tests/opaque.rs b/compiler/rustc_serialize/tests/opaque.rs index 45ff85f38d2..833151d82be 100644 --- a/compiler/rustc_serialize/tests/opaque.rs +++ b/compiler/rustc_serialize/tests/opaque.rs @@ -42,7 +42,7 @@ fn check_round_trip< encoder.finish().unwrap(); let data = fs::read(&tmpfile).unwrap(); - let mut decoder = MemDecoder::new(&data[..], 0); + let mut decoder = MemDecoder::new(&data[..], 0).unwrap(); for value in values { let decoded = Decodable::decode(&mut decoder); assert_eq!(value, decoded); diff --git a/compiler/rustc_session/src/parse.rs b/compiler/rustc_session/src/parse.rs index f6053f43fbd..df07f81bc45 100644 --- a/compiler/rustc_session/src/parse.rs +++ b/compiler/rustc_session/src/parse.rs @@ -305,32 +305,12 @@ impl ParseSess { lint: &'static Lint, span: impl Into<MultiSpan>, node_id: NodeId, - msg: impl Into<DiagMessage>, - ) { - self.buffered_lints.with_lock(|buffered_lints| { - buffered_lints.push(BufferedEarlyLint { - span: span.into(), - node_id, - msg: msg.into(), - lint_id: LintId::of(lint), - diagnostic: BuiltinLintDiag::Normal, - }); - }); - } - - pub fn buffer_lint_with_diagnostic( - &self, - lint: &'static Lint, - span: impl Into<MultiSpan>, - node_id: NodeId, - msg: impl Into<DiagMessage>, diagnostic: BuiltinLintDiag, ) { self.buffered_lints.with_lock(|buffered_lints| { buffered_lints.push(BufferedEarlyLint { span: span.into(), node_id, - msg: msg.into(), lint_id: LintId::of(lint), diagnostic, }); diff --git a/compiler/rustc_session/src/session.rs b/compiler/rustc_session/src/session.rs index db01bb90d6f..a2872fc1661 100644 --- a/compiler/rustc_session/src/session.rs +++ b/compiler/rustc_session/src/session.rs @@ -1183,9 +1183,9 @@ fn validate_commandline_args_with_session_available(sess: &Session) { }); } } - // Cannot mix and match sanitizers. - let mut sanitizer_iter = sess.opts.unstable_opts.sanitizer.into_iter(); - if let (Some(first), Some(second)) = (sanitizer_iter.next(), sanitizer_iter.next()) { + + // Cannot mix and match mutually-exclusive sanitizers. + if let Some((first, second)) = sess.opts.unstable_opts.sanitizer.mutually_exclusive() { sess.dcx().emit_err(errors::CannotMixAndMatchSanitizers { first: first.to_string(), second: second.to_string(), @@ -1220,14 +1220,6 @@ fn validate_commandline_args_with_session_available(sess: &Session) { sess.dcx().emit_err(errors::SanitizerCfiRequiresSingleCodegenUnit); } - // LLVM CFI is incompatible with LLVM KCFI. - if sess.is_sanitizer_cfi_enabled() && sess.is_sanitizer_kcfi_enabled() { - sess.dcx().emit_err(errors::CannotMixAndMatchSanitizers { - first: "cfi".to_string(), - second: "kcfi".to_string(), - }); - } - // Canonical jump tables requires CFI. if sess.is_sanitizer_cfi_canonical_jump_tables_disabled() { if !sess.is_sanitizer_cfi_enabled() { diff --git a/compiler/rustc_session/src/version.rs b/compiler/rustc_session/src/version.rs index 39e4541349e..e244c77f7f9 100644 --- a/compiler/rustc_session/src/version.rs +++ b/compiler/rustc_session/src/version.rs @@ -1,5 +1,10 @@ use rustc_macros::{current_rustc_version, Decodable, Encodable, HashStable_Generic}; -use std::fmt::{self, Display}; +use std::{ + borrow::Cow, + fmt::{self, Display}, +}; + +use rustc_errors::IntoDiagArg; #[derive(Encodable, Decodable, Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)] #[derive(HashStable_Generic)] @@ -18,3 +23,9 @@ impl Display for RustcVersion { write!(formatter, "{}.{}.{}", self.major, self.minor, self.patch) } } + +impl IntoDiagArg for RustcVersion { + fn into_diag_arg(self) -> rustc_errors::DiagArgValue { + rustc_errors::DiagArgValue::Str(Cow::Owned(self.to_string())) + } +} diff --git a/compiler/rustc_smir/src/rustc_smir/convert/ty.rs b/compiler/rustc_smir/src/rustc_smir/convert/ty.rs index d59318be720..be20924670c 100644 --- a/compiler/rustc_smir/src/rustc_smir/convert/ty.rs +++ b/compiler/rustc_smir/src/rustc_smir/convert/ty.rs @@ -505,6 +505,7 @@ impl<'tcx> Stable<'tcx> for ty::TraitDef { is_marker: self.is_marker, is_coinductive: self.is_coinductive, skip_array_during_method_dispatch: self.skip_array_during_method_dispatch, + skip_boxed_slice_during_method_dispatch: self.skip_boxed_slice_during_method_dispatch, specialization_kind: self.specialization_kind.stable(tables), must_implement_one_of: self .must_implement_one_of @@ -706,12 +707,11 @@ impl<'tcx> Stable<'tcx> for ty::TraitPredicate<'tcx> { } } -impl<'tcx, A, B, U, V> Stable<'tcx> for ty::OutlivesPredicate<A, B> +impl<'tcx, T> Stable<'tcx> for ty::OutlivesPredicate<'tcx, T> where - A: Stable<'tcx, T = U>, - B: Stable<'tcx, T = V>, + T: Stable<'tcx>, { - type T = stable_mir::ty::OutlivesPredicate<U, V>; + type T = stable_mir::ty::OutlivesPredicate<T::T, Region>; fn stable(&self, tables: &mut Tables<'_>) -> Self::T { let ty::OutlivesPredicate(a, b) = self; diff --git a/compiler/rustc_span/src/hygiene.rs b/compiler/rustc_span/src/hygiene.rs index aa4bcefab93..00ef17d630c 100644 --- a/compiler/rustc_span/src/hygiene.rs +++ b/compiler/rustc_span/src/hygiene.rs @@ -40,6 +40,7 @@ use std::cell::RefCell; use std::collections::hash_map::Entry; use std::fmt; use std::hash::Hash; +use tracing::{debug, trace}; /// A `SyntaxContext` represents a chain of pairs `(ExpnId, Transparency)` named "marks". #[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)] diff --git a/compiler/rustc_span/src/lib.rs b/compiler/rustc_span/src/lib.rs index f83bacdcebe..b2ca01fe3b9 100644 --- a/compiler/rustc_span/src/lib.rs +++ b/compiler/rustc_span/src/lib.rs @@ -33,15 +33,16 @@ #![feature(rustdoc_internals)] // tidy-alphabetical-end +// The code produced by the `Encodable`/`Decodable` derive macros refer to +// `rustc_span::Span{Encoder,Decoder}`. That's fine outside this crate, but doesn't work inside +// this crate without this line making `rustc_span` available. extern crate self as rustc_span; -#[macro_use] -extern crate tracing; - use rustc_data_structures::{outline, AtomicRef}; use rustc_macros::{Decodable, Encodable, HashStable_Generic}; use rustc_serialize::opaque::{FileEncoder, MemDecoder}; use rustc_serialize::{Decodable, Decoder, Encodable, Encoder}; +use tracing::debug; mod caching_source_map_view; pub mod source_map; diff --git a/compiler/rustc_span/src/source_map.rs b/compiler/rustc_span/src/source_map.rs index 2093dcf0e83..fb212d67997 100644 --- a/compiler/rustc_span/src/source_map.rs +++ b/compiler/rustc_span/src/source_map.rs @@ -16,6 +16,7 @@ use rustc_macros::{Decodable, Encodable}; use std::fs; use std::io::{self, BorrowedBuf, Read}; use std::path; +use tracing::{debug, instrument, trace}; #[cfg(test)] mod tests; diff --git a/compiler/rustc_span/src/symbol.rs b/compiler/rustc_span/src/symbol.rs index e453c03e7ce..ace4dff46aa 100644 --- a/compiler/rustc_span/src/symbol.rs +++ b/compiler/rustc_span/src/symbol.rs @@ -1633,7 +1633,7 @@ symbols! { rustc_reservation_impl, rustc_safe_intrinsic, rustc_serialize, - rustc_skip_array_during_method_dispatch, + rustc_skip_during_method_dispatch, rustc_specialization_trait, rustc_std_internal_symbol, rustc_strict_coherence, @@ -1682,6 +1682,7 @@ symbols! { simd_cast_ptr, simd_ceil, simd_ctlz, + simd_ctpop, simd_cttz, simd_div, simd_eq, diff --git a/compiler/rustc_target/src/spec/base/apple/mod.rs b/compiler/rustc_target/src/spec/base/apple/mod.rs index c5b2065080b..05542009083 100644 --- a/compiler/rustc_target/src/spec/base/apple/mod.rs +++ b/compiler/rustc_target/src/spec/base/apple/mod.rs @@ -272,6 +272,7 @@ fn macos_default_deployment_target(arch: Arch) -> (u32, u32) { fn macos_deployment_target(arch: Arch) -> (u32, u32) { // If you are looking for the default deployment target, prefer `rustc --print deployment-target`. + // Note: If bumping this version, remember to update it in the rustc/platform-support docs. from_set_deployment_target("MACOSX_DEPLOYMENT_TARGET") .unwrap_or_else(|| macos_default_deployment_target(arch)) } @@ -320,6 +321,7 @@ fn link_env_remove(os: &'static str) -> StaticCow<[StaticCow<str>]> { fn ios_deployment_target(arch: Arch, abi: &str) -> (u32, u32) { // If you are looking for the default deployment target, prefer `rustc --print deployment-target`. + // Note: If bumping this version, remember to update it in the rustc/platform-support docs. let (major, minor) = match (arch, abi) { (Arm64e, _) => (14, 0), // Mac Catalyst defaults to 13.1 in Clang. @@ -352,6 +354,7 @@ pub fn ios_sim_llvm_target(arch: Arch) -> String { fn tvos_deployment_target() -> (u32, u32) { // If you are looking for the default deployment target, prefer `rustc --print deployment-target`. + // Note: If bumping this version, remember to update it in the rustc platform-support docs. from_set_deployment_target("TVOS_DEPLOYMENT_TARGET").unwrap_or((10, 0)) } @@ -367,6 +370,7 @@ pub fn tvos_sim_llvm_target(arch: Arch) -> String { fn watchos_deployment_target() -> (u32, u32) { // If you are looking for the default deployment target, prefer `rustc --print deployment-target`. + // Note: If bumping this version, remember to update it in the rustc platform-support docs. from_set_deployment_target("WATCHOS_DEPLOYMENT_TARGET").unwrap_or((5, 0)) } @@ -382,6 +386,7 @@ pub fn watchos_sim_llvm_target(arch: Arch) -> String { fn visionos_deployment_target() -> (u32, u32) { // If you are looking for the default deployment target, prefer `rustc --print deployment-target`. + // Note: If bumping this version, remember to update it in the rustc platform-support docs. from_set_deployment_target("XROS_DEPLOYMENT_TARGET").unwrap_or((1, 0)) } diff --git a/compiler/rustc_target/src/spec/mod.rs b/compiler/rustc_target/src/spec/mod.rs index 910c6aeb7d6..83ee63e2cf2 100644 --- a/compiler/rustc_target/src/spec/mod.rs +++ b/compiler/rustc_target/src/spec/mod.rs @@ -1317,6 +1317,34 @@ bitflags::bitflags! { rustc_data_structures::external_bitflags_debug! { SanitizerSet } impl SanitizerSet { + // Taken from LLVM's sanitizer compatibility logic: + // https://github.com/llvm/llvm-project/blob/release/18.x/clang/lib/Driver/SanitizerArgs.cpp#L512 + const MUTUALLY_EXCLUSIVE: &'static [(SanitizerSet, SanitizerSet)] = &[ + (SanitizerSet::ADDRESS, SanitizerSet::MEMORY), + (SanitizerSet::ADDRESS, SanitizerSet::THREAD), + (SanitizerSet::ADDRESS, SanitizerSet::HWADDRESS), + (SanitizerSet::ADDRESS, SanitizerSet::MEMTAG), + (SanitizerSet::ADDRESS, SanitizerSet::KERNELADDRESS), + (SanitizerSet::ADDRESS, SanitizerSet::SAFESTACK), + (SanitizerSet::LEAK, SanitizerSet::MEMORY), + (SanitizerSet::LEAK, SanitizerSet::THREAD), + (SanitizerSet::LEAK, SanitizerSet::KERNELADDRESS), + (SanitizerSet::LEAK, SanitizerSet::SAFESTACK), + (SanitizerSet::MEMORY, SanitizerSet::THREAD), + (SanitizerSet::MEMORY, SanitizerSet::HWADDRESS), + (SanitizerSet::MEMORY, SanitizerSet::KERNELADDRESS), + (SanitizerSet::MEMORY, SanitizerSet::SAFESTACK), + (SanitizerSet::THREAD, SanitizerSet::HWADDRESS), + (SanitizerSet::THREAD, SanitizerSet::KERNELADDRESS), + (SanitizerSet::THREAD, SanitizerSet::SAFESTACK), + (SanitizerSet::HWADDRESS, SanitizerSet::MEMTAG), + (SanitizerSet::HWADDRESS, SanitizerSet::KERNELADDRESS), + (SanitizerSet::HWADDRESS, SanitizerSet::SAFESTACK), + (SanitizerSet::CFI, SanitizerSet::KCFI), + (SanitizerSet::MEMTAG, SanitizerSet::KERNELADDRESS), + (SanitizerSet::KERNELADDRESS, SanitizerSet::SAFESTACK), + ]; + /// Return sanitizer's name /// /// Returns none if the flags is a set of sanitizers numbering not exactly one. @@ -1337,6 +1365,13 @@ impl SanitizerSet { _ => return None, }) } + + pub fn mutually_exclusive(self) -> Option<(SanitizerSet, SanitizerSet)> { + Self::MUTUALLY_EXCLUSIVE + .into_iter() + .find(|&(a, b)| self.contains(*a) && self.contains(*b)) + .copied() + } } /// Formats a sanitizer set as a comma separated list of sanitizers' names. diff --git a/compiler/rustc_trait_selection/src/solve/assembly/structural_traits.rs b/compiler/rustc_trait_selection/src/solve/assembly/structural_traits.rs index 930ae5af811..6f68875e6f6 100644 --- a/compiler/rustc_trait_selection/src/solve/assembly/structural_traits.rs +++ b/compiler/rustc_trait_selection/src/solve/assembly/structural_traits.rs @@ -300,14 +300,11 @@ pub(in crate::solve) fn extract_tupled_inputs_and_output_from_callable<'tcx>( return Err(NoSolution); } - // If `Fn`/`FnMut`, we only implement this goal if we - // have no captures. - let no_borrows = match args.tupled_upvars_ty().kind() { - ty::Tuple(tys) => tys.is_empty(), - ty::Error(_) => false, - _ => bug!("tuple_fields called on non-tuple"), - }; - if closure_kind != ty::ClosureKind::FnOnce && !no_borrows { + // A coroutine-closure implements `FnOnce` *always*, since it may + // always be called once. It additionally implements `Fn`/`FnMut` + // only if it has no upvars referencing the closure-env lifetime, + // and if the closure kind permits it. + if closure_kind != ty::ClosureKind::FnOnce && args.has_self_borrows() { return Err(NoSolution); } diff --git a/compiler/rustc_trait_selection/src/solve/fulfill.rs b/compiler/rustc_trait_selection/src/solve/fulfill.rs index 4933080451d..7291eb00e72 100644 --- a/compiler/rustc_trait_selection/src/solve/fulfill.rs +++ b/compiler/rustc_trait_selection/src/solve/fulfill.rs @@ -380,7 +380,10 @@ impl<'tcx> ProofTreeVisitor<'tcx> for BestObligation<'tcx> { source: CandidateSource::Impl(impl_def_id), result: _, } = candidate.kind() - && goal.infcx().tcx.has_attr(impl_def_id, sym::do_not_recommend) + && goal + .infcx() + .tcx + .has_attrs_with_path(impl_def_id, &[sym::diagnostic, sym::do_not_recommend]) { return ControlFlow::Break(self.obligation.clone()); } diff --git a/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs b/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs index f9b6b281f92..6c56ebb62ae 100644 --- a/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs +++ b/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs @@ -47,7 +47,8 @@ use crate::infer::InferCtxtExt as _; use crate::traits::error_reporting::type_err_ctxt_ext::InferCtxtPrivExt; use crate::traits::query::evaluate_obligation::InferCtxtExt as _; use rustc_middle::ty::print::{ - with_forced_trimmed_paths, with_no_trimmed_paths, PrintTraitPredicateExt as _, + with_forced_trimmed_paths, with_no_trimmed_paths, PrintPolyTraitPredicateExt as _, + PrintTraitPredicateExt as _, }; use itertools::EitherOrBoth; diff --git a/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs b/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs index 20dfb5e6642..494fca0336c 100644 --- a/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs +++ b/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs @@ -1012,7 +1012,10 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> { let mut base_cause = obligation.cause.code().clone(); loop { if let ObligationCauseCode::ImplDerived(ref c) = base_cause { - if self.tcx.has_attr(c.impl_or_alias_def_id, sym::do_not_recommend) { + if self.tcx.has_attrs_with_path( + c.impl_or_alias_def_id, + &[sym::diagnostic, sym::do_not_recommend], + ) { let code = (*c.derived.parent_code).clone(); obligation.cause.map_code(|_| code); obligation.predicate = c.derived.parent_trait_pred.upcast(self.tcx); diff --git a/compiler/rustc_trait_selection/src/traits/query/type_op/implied_outlives_bounds.rs b/compiler/rustc_trait_selection/src/traits/query/type_op/implied_outlives_bounds.rs index f7e84a46639..00cc77e71e7 100644 --- a/compiler/rustc_trait_selection/src/traits/query/type_op/implied_outlives_bounds.rs +++ b/compiler/rustc_trait_selection/src/traits/query/type_op/implied_outlives_bounds.rs @@ -162,8 +162,7 @@ pub fn compute_implied_outlives_bounds_compat_inner<'tcx>( let mut checked_wf_args = rustc_data_structures::fx::FxHashSet::default(); let mut wf_args = vec![ty.into()]; - let mut outlives_bounds: Vec<ty::OutlivesPredicate<ty::GenericArg<'tcx>, ty::Region<'tcx>>> = - vec![]; + let mut outlives_bounds: Vec<ty::OutlivesPredicate<'tcx, ty::GenericArg<'tcx>>> = vec![]; while let Some(arg) = wf_args.pop() { if !checked_wf_args.insert(arg) { diff --git a/compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs b/compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs index b9e853a0678..fd7c47ad6fb 100644 --- a/compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs +++ b/compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs @@ -418,20 +418,11 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { // Ambiguity if upvars haven't been constrained yet && !args.tupled_upvars_ty().is_ty_var() { - let no_borrows = match args.tupled_upvars_ty().kind() { - ty::Tuple(tys) => tys.is_empty(), - ty::Error(_) => false, - _ => bug!("tuple_fields called on non-tuple"), - }; // A coroutine-closure implements `FnOnce` *always*, since it may // always be called once. It additionally implements `Fn`/`FnMut` - // only if it has no upvars (therefore no borrows from the closure - // that would need to be represented with a lifetime) and if the - // closure kind permits it. - // FIXME(async_closures): Actually, it could also implement `Fn`/`FnMut` - // if it takes all of its upvars by copy, and none by ref. This would - // require us to record a bit more information during upvar analysis. - if no_borrows && closure_kind.extends(kind) { + // only if it has no upvars referencing the closure-env lifetime, + // and if the closure kind permits it. + if closure_kind.extends(kind) && !args.has_self_borrows() { candidates.vec.push(ClosureCandidate { is_const }); } else if kind == ty::ClosureKind::FnOnce { candidates.vec.push(ClosureCandidate { is_const }); diff --git a/compiler/rustc_type_ir/src/binder.rs b/compiler/rustc_type_ir/src/binder.rs new file mode 100644 index 00000000000..5336b915a1d --- /dev/null +++ b/compiler/rustc_type_ir/src/binder.rs @@ -0,0 +1,340 @@ +use std::fmt::Debug; +use std::hash::Hash; +use std::ops::{ControlFlow, Deref}; + +#[cfg(feature = "nightly")] +use rustc_macros::HashStable_NoContext; +use rustc_serialize::Decodable; + +use crate::fold::{FallibleTypeFolder, TypeFoldable, TypeSuperFoldable}; +use crate::inherent::*; +use crate::lift::Lift; +use crate::visit::{Flags, TypeSuperVisitable, TypeVisitable, TypeVisitableExt, TypeVisitor}; +use crate::{self as ty, Interner, SsoHashSet}; + +/// Binder is a binder for higher-ranked lifetimes or types. It is part of the +/// compiler's representation for things like `for<'a> Fn(&'a isize)` +/// (which would be represented by the type `PolyTraitRef == +/// Binder<I, TraitRef>`). Note that when we instantiate, +/// erase, or otherwise "discharge" these bound vars, we change the +/// type from `Binder<I, T>` to just `T` (see +/// e.g., `liberate_late_bound_regions`). +/// +/// `Decodable` and `Encodable` are implemented for `Binder<T>` using the `impl_binder_encode_decode!` macro. +#[derive(derivative::Derivative)] +#[derivative( + Clone(bound = "T: Clone"), + Copy(bound = "T: Copy"), + Hash(bound = "T: Hash"), + PartialEq(bound = "T: PartialEq"), + Eq(bound = "T: Eq"), + Debug(bound = "T: Debug") +)] +#[cfg_attr(feature = "nightly", derive(HashStable_NoContext))] +pub struct Binder<I: Interner, T> { + value: T, + bound_vars: I::BoundVarKinds, +} + +// FIXME: We manually derive `Lift` because the `derive(Lift_Generic)` doesn't +// understand how to turn `T` to `T::Lifted` in the output `type Lifted`. +impl<I: Interner, U: Interner, T> Lift<U> for Binder<I, T> +where + T: Lift<U>, + I::BoundVarKinds: Lift<U, Lifted = U::BoundVarKinds>, +{ + type Lifted = Binder<U, T::Lifted>; + + fn lift_to_tcx(self, tcx: U) -> Option<Self::Lifted> { + Some(Binder { + value: self.value.lift_to_tcx(tcx)?, + bound_vars: self.bound_vars.lift_to_tcx(tcx)?, + }) + } +} + +macro_rules! impl_binder_encode_decode { + ($($t:ty),+ $(,)?) => { + $( + impl<I: Interner, E: crate::TyEncoder<I = I>> rustc_serialize::Encodable<E> for ty::Binder<I, $t> + where + $t: rustc_serialize::Encodable<E>, + I::BoundVarKinds: rustc_serialize::Encodable<E>, + { + fn encode(&self, e: &mut E) { + self.bound_vars().encode(e); + self.as_ref().skip_binder().encode(e); + } + } + impl<I: Interner, D: crate::TyDecoder<I = I>> Decodable<D> for ty::Binder<I, $t> + where + $t: TypeVisitable<I> + rustc_serialize::Decodable<D>, + I::BoundVarKinds: rustc_serialize::Decodable<D>, + { + fn decode(decoder: &mut D) -> Self { + let bound_vars = Decodable::decode(decoder); + ty::Binder::bind_with_vars(<$t>::decode(decoder), bound_vars) + } + } + )* + } +} + +impl_binder_encode_decode! { + ty::FnSig<I>, + ty::TraitPredicate<I>, + ty::ExistentialPredicate<I>, + ty::TraitRef<I>, + ty::ExistentialTraitRef<I>, +} + +impl<I: Interner, T> Binder<I, T> +where + T: TypeVisitable<I>, +{ + /// Wraps `value` in a binder, asserting that `value` does not + /// contain any bound vars that would be bound by the + /// binder. This is commonly used to 'inject' a value T into a + /// different binding level. + #[track_caller] + pub fn dummy(value: T) -> Binder<I, T> { + assert!( + !value.has_escaping_bound_vars(), + "`{value:?}` has escaping bound vars, so it cannot be wrapped in a dummy binder." + ); + Binder { value, bound_vars: Default::default() } + } + + pub fn bind_with_vars(value: T, bound_vars: I::BoundVarKinds) -> Binder<I, T> { + if cfg!(debug_assertions) { + let mut validator = ValidateBoundVars::new(bound_vars); + value.visit_with(&mut validator); + } + Binder { value, bound_vars } + } +} + +impl<I: Interner, T: TypeFoldable<I>> TypeFoldable<I> for Binder<I, T> { + fn try_fold_with<F: FallibleTypeFolder<I>>(self, folder: &mut F) -> Result<Self, F::Error> { + folder.try_fold_binder(self) + } +} + +impl<I: Interner, T: TypeVisitable<I>> TypeVisitable<I> for Binder<I, T> { + fn visit_with<V: TypeVisitor<I>>(&self, visitor: &mut V) -> V::Result { + visitor.visit_binder(self) + } +} + +impl<I: Interner, T: TypeFoldable<I>> TypeSuperFoldable<I> for Binder<I, T> { + fn try_super_fold_with<F: FallibleTypeFolder<I>>( + self, + folder: &mut F, + ) -> Result<Self, F::Error> { + self.try_map_bound(|ty| ty.try_fold_with(folder)) + } +} + +impl<I: Interner, T: TypeVisitable<I>> TypeSuperVisitable<I> for Binder<I, T> { + fn super_visit_with<V: TypeVisitor<I>>(&self, visitor: &mut V) -> V::Result { + self.as_ref().skip_binder().visit_with(visitor) + } +} + +impl<I: Interner, T> Binder<I, T> { + /// Skips the binder and returns the "bound" value. This is a + /// risky thing to do because it's easy to get confused about + /// De Bruijn indices and the like. It is usually better to + /// discharge the binder using `no_bound_vars` or + /// `instantiate_bound_regions` or something like + /// that. `skip_binder` is only valid when you are either + /// extracting data that has nothing to do with bound vars, you + /// are doing some sort of test that does not involve bound + /// regions, or you are being very careful about your depth + /// accounting. + /// + /// Some examples where `skip_binder` is reasonable: + /// + /// - extracting the `DefId` from a PolyTraitRef; + /// - comparing the self type of a PolyTraitRef to see if it is equal to + /// a type parameter `X`, since the type `X` does not reference any regions + pub fn skip_binder(self) -> T { + self.value + } + + pub fn bound_vars(&self) -> I::BoundVarKinds { + self.bound_vars + } + + pub fn as_ref(&self) -> Binder<I, &T> { + Binder { value: &self.value, bound_vars: self.bound_vars } + } + + pub fn as_deref(&self) -> Binder<I, &T::Target> + where + T: Deref, + { + Binder { value: &self.value, bound_vars: self.bound_vars } + } + + pub fn map_bound_ref<F, U: TypeVisitable<I>>(&self, f: F) -> Binder<I, U> + where + F: FnOnce(&T) -> U, + { + self.as_ref().map_bound(f) + } + + pub fn map_bound<F, U: TypeVisitable<I>>(self, f: F) -> Binder<I, U> + where + F: FnOnce(T) -> U, + { + let Binder { value, bound_vars } = self; + let value = f(value); + if cfg!(debug_assertions) { + let mut validator = ValidateBoundVars::new(bound_vars); + value.visit_with(&mut validator); + } + Binder { value, bound_vars } + } + + pub fn try_map_bound<F, U: TypeVisitable<I>, E>(self, f: F) -> Result<Binder<I, U>, E> + where + F: FnOnce(T) -> Result<U, E>, + { + let Binder { value, bound_vars } = self; + let value = f(value)?; + if cfg!(debug_assertions) { + let mut validator = ValidateBoundVars::new(bound_vars); + value.visit_with(&mut validator); + } + Ok(Binder { value, bound_vars }) + } + + /// Wraps a `value` in a binder, using the same bound variables as the + /// current `Binder`. This should not be used if the new value *changes* + /// the bound variables. Note: the (old or new) value itself does not + /// necessarily need to *name* all the bound variables. + /// + /// This currently doesn't do anything different than `bind`, because we + /// don't actually track bound vars. However, semantically, it is different + /// because bound vars aren't allowed to change here, whereas they are + /// in `bind`. This may be (debug) asserted in the future. + pub fn rebind<U>(&self, value: U) -> Binder<I, U> + where + U: TypeVisitable<I>, + { + Binder::bind_with_vars(value, self.bound_vars) + } + + /// Unwraps and returns the value within, but only if it contains + /// no bound vars at all. (In other words, if this binder -- + /// and indeed any enclosing binder -- doesn't bind anything at + /// all.) Otherwise, returns `None`. + /// + /// (One could imagine having a method that just unwraps a single + /// binder, but permits late-bound vars bound by enclosing + /// binders, but that would require adjusting the debruijn + /// indices, and given the shallow binding structure we often use, + /// would not be that useful.) + pub fn no_bound_vars(self) -> Option<T> + where + T: TypeVisitable<I>, + { + // `self.value` is equivalent to `self.skip_binder()` + if self.value.has_escaping_bound_vars() { None } else { Some(self.skip_binder()) } + } + + /// Splits the contents into two things that share the same binder + /// level as the original, returning two distinct binders. + /// + /// `f` should consider bound regions at depth 1 to be free, and + /// anything it produces with bound regions at depth 1 will be + /// bound in the resulting return values. + pub fn split<U, V, F>(self, f: F) -> (Binder<I, U>, Binder<I, V>) + where + F: FnOnce(T) -> (U, V), + { + let Binder { value, bound_vars } = self; + let (u, v) = f(value); + (Binder { value: u, bound_vars }, Binder { value: v, bound_vars }) + } +} + +impl<I: Interner, T> Binder<I, Option<T>> { + pub fn transpose(self) -> Option<Binder<I, T>> { + let Binder { value, bound_vars } = self; + value.map(|value| Binder { value, bound_vars }) + } +} + +impl<I: Interner, T: IntoIterator> Binder<I, T> { + pub fn iter(self) -> impl Iterator<Item = Binder<I, T::Item>> { + let Binder { value, bound_vars } = self; + value.into_iter().map(move |value| Binder { value, bound_vars }) + } +} + +pub struct ValidateBoundVars<I: Interner> { + bound_vars: I::BoundVarKinds, + binder_index: ty::DebruijnIndex, + // We may encounter the same variable at different levels of binding, so + // this can't just be `Ty` + visited: SsoHashSet<(ty::DebruijnIndex, I::Ty)>, +} + +impl<I: Interner> ValidateBoundVars<I> { + pub fn new(bound_vars: I::BoundVarKinds) -> Self { + ValidateBoundVars { + bound_vars, + binder_index: ty::INNERMOST, + visited: SsoHashSet::default(), + } + } +} + +impl<I: Interner> TypeVisitor<I> for ValidateBoundVars<I> { + type Result = ControlFlow<()>; + + fn visit_binder<T: TypeVisitable<I>>(&mut self, t: &Binder<I, T>) -> Self::Result { + self.binder_index.shift_in(1); + let result = t.super_visit_with(self); + self.binder_index.shift_out(1); + result + } + + fn visit_ty(&mut self, t: I::Ty) -> Self::Result { + if t.outer_exclusive_binder() < self.binder_index + || !self.visited.insert((self.binder_index, t)) + { + return ControlFlow::Break(()); + } + match t.kind() { + ty::Bound(debruijn, bound_ty) if debruijn == self.binder_index => { + let idx = bound_ty.var().as_usize(); + if self.bound_vars.len() <= idx { + panic!("Not enough bound vars: {:?} not found in {:?}", t, self.bound_vars); + } + bound_ty.assert_eq(self.bound_vars[idx]); + } + _ => {} + }; + + t.super_visit_with(self) + } + + fn visit_region(&mut self, r: I::Region) -> Self::Result { + match r.kind() { + ty::ReBound(index, br) if index == self.binder_index => { + let idx = br.var().as_usize(); + if self.bound_vars.len() <= idx { + panic!("Not enough bound vars: {:?} not found in {:?}", r, self.bound_vars); + } + br.assert_eq(self.bound_vars[idx]); + } + + _ => (), + }; + + ControlFlow::Continue(()) + } +} diff --git a/compiler/rustc_type_ir/src/const_kind.rs b/compiler/rustc_type_ir/src/const_kind.rs index af07e9ff96b..7076df2893f 100644 --- a/compiler/rustc_type_ir/src/const_kind.rs +++ b/compiler/rustc_type_ir/src/const_kind.rs @@ -5,7 +5,7 @@ use rustc_macros::{HashStable_NoContext, TyDecodable, TyEncodable}; use rustc_type_ir_macros::{Lift_Generic, TypeFoldable_Generic, TypeVisitable_Generic}; use std::fmt; -use crate::{DebruijnIndex, DebugWithInfcx, InferCtxtLike, Interner, WithInfcx}; +use crate::{self as ty, DebruijnIndex, DebugWithInfcx, InferCtxtLike, Interner, WithInfcx}; use self::ConstKind::*; @@ -29,7 +29,7 @@ pub enum ConstKind<I: Interner> { /// An unnormalized const item such as an anon const or assoc const or free const item. /// Right now anything other than anon consts does not actually work properly but this /// should - Unevaluated(I::AliasConst), + Unevaluated(ty::UnevaluatedConst<I>), /// Used to hold computed value. Value(I::ValueConst), diff --git a/compiler/rustc_type_ir/src/fold.rs b/compiler/rustc_type_ir/src/fold.rs index 01bb3d73dbd..405aba30241 100644 --- a/compiler/rustc_type_ir/src/fold.rs +++ b/compiler/rustc_type_ir/src/fold.rs @@ -48,8 +48,8 @@ use rustc_index::{Idx, IndexVec}; use std::mem; -use crate::Lrc; -use crate::{visit::TypeVisitable, Interner}; +use crate::visit::TypeVisitable; +use crate::{self as ty, Interner, Lrc}; #[cfg(feature = "nightly")] type Never = !; @@ -128,10 +128,9 @@ pub trait TypeSuperFoldable<I: Interner>: TypeFoldable<I> { pub trait TypeFolder<I: Interner>: FallibleTypeFolder<I, Error = Never> { fn interner(&self) -> I; - fn fold_binder<T>(&mut self, t: I::Binder<T>) -> I::Binder<T> + fn fold_binder<T>(&mut self, t: ty::Binder<I, T>) -> ty::Binder<I, T> where T: TypeFoldable<I>, - I::Binder<T>: TypeSuperFoldable<I>, { t.super_fold_with(self) } @@ -167,10 +166,9 @@ pub trait FallibleTypeFolder<I: Interner>: Sized { fn interner(&self) -> I; - fn try_fold_binder<T>(&mut self, t: I::Binder<T>) -> Result<I::Binder<T>, Self::Error> + fn try_fold_binder<T>(&mut self, t: ty::Binder<I, T>) -> Result<ty::Binder<I, T>, Self::Error> where T: TypeFoldable<I>, - I::Binder<T>: TypeSuperFoldable<I>, { t.try_super_fold_with(self) } @@ -206,10 +204,9 @@ where TypeFolder::interner(self) } - fn try_fold_binder<T>(&mut self, t: I::Binder<T>) -> Result<I::Binder<T>, Never> + fn try_fold_binder<T>(&mut self, t: ty::Binder<I, T>) -> Result<ty::Binder<I, T>, Never> where T: TypeFoldable<I>, - I::Binder<T>: TypeSuperFoldable<I>, { Ok(self.fold_binder(t)) } diff --git a/compiler/rustc_type_ir/src/inherent.rs b/compiler/rustc_type_ir/src/inherent.rs index f66c6e722f7..77fe30a4660 100644 --- a/compiler/rustc_type_ir/src/inherent.rs +++ b/compiler/rustc_type_ir/src/inherent.rs @@ -8,11 +8,8 @@ use std::hash::Hash; use std::ops::Deref; use crate::fold::{TypeFoldable, TypeSuperFoldable}; -use crate::visit::{Flags, TypeSuperVisitable}; -use crate::{ - AliasTy, AliasTyKind, BoundVar, ConstKind, ConstVid, DebruijnIndex, DebugWithInfcx, InferConst, - InferTy, Interner, RegionKind, TyKind, TyVid, UnevaluatedConst, UniverseIndex, -}; +use crate::visit::{Flags, TypeSuperVisitable, TypeVisitable}; +use crate::{self as ty, DebugWithInfcx, Interner, UpcastFrom}; pub trait Ty<I: Interner<Ty = Self>>: Copy @@ -21,24 +18,30 @@ pub trait Ty<I: Interner<Ty = Self>>: + Eq + Into<I::GenericArg> + Into<I::Term> - + IntoKind<Kind = TyKind<I>> + + IntoKind<Kind = ty::TyKind<I>> + TypeSuperVisitable<I> + TypeSuperFoldable<I> + Flags { fn new_bool(interner: I) -> Self; - fn new_infer(interner: I, var: InferTy) -> Self; + fn new_infer(interner: I, var: ty::InferTy) -> Self; - fn new_var(interner: I, var: TyVid) -> Self; + fn new_var(interner: I, var: ty::TyVid) -> Self; - fn new_anon_bound(interner: I, debruijn: DebruijnIndex, var: BoundVar) -> Self; + fn new_anon_bound(interner: I, debruijn: ty::DebruijnIndex, var: ty::BoundVar) -> Self; - fn new_alias(interner: I, kind: AliasTyKind, alias_ty: AliasTy<I>) -> Self; + fn new_alias(interner: I, kind: ty::AliasTyKind, alias_ty: ty::AliasTy<I>) -> Self; } pub trait Tys<I: Interner<Tys = Self>>: - Copy + Debug + Hash + Eq + IntoIterator<Item = I::Ty> + Deref<Target: Deref<Target = [I::Ty]>> + Copy + + Debug + + Hash + + Eq + + IntoIterator<Item = I::Ty> + + Deref<Target: Deref<Target = [I::Ty]>> + + TypeVisitable<I> { fn split_inputs_and_output(self) -> (I::FnInputTys, I::Ty); } @@ -49,13 +52,21 @@ pub trait Abi<I: Interner<Abi = Self>>: Copy + Debug + Hash + Eq { } pub trait Safety<I: Interner<Safety = Self>>: Copy + Debug + Hash + Eq { + fn is_safe(self) -> bool; + fn prefix_str(self) -> &'static str; } pub trait Region<I: Interner<Region = Self>>: - Copy + DebugWithInfcx<I> + Hash + Eq + Into<I::GenericArg> + IntoKind<Kind = RegionKind<I>> + Flags + Copy + + DebugWithInfcx<I> + + Hash + + Eq + + Into<I::GenericArg> + + IntoKind<Kind = ty::RegionKind<I>> + + Flags { - fn new_anon_bound(interner: I, debruijn: DebruijnIndex, var: BoundVar) -> Self; + fn new_anon_bound(interner: I, debruijn: ty::DebruijnIndex, var: ty::BoundVar) -> Self; fn new_static(interner: I) -> Self; } @@ -67,18 +78,23 @@ pub trait Const<I: Interner<Const = Self>>: + Eq + Into<I::GenericArg> + Into<I::Term> - + IntoKind<Kind = ConstKind<I>> + + IntoKind<Kind = ty::ConstKind<I>> + TypeSuperVisitable<I> + TypeSuperFoldable<I> + Flags { - fn new_infer(interner: I, var: InferConst, ty: I::Ty) -> Self; + fn new_infer(interner: I, var: ty::InferConst, ty: I::Ty) -> Self; - fn new_var(interner: I, var: ConstVid, ty: I::Ty) -> Self; + fn new_var(interner: I, var: ty::ConstVid, ty: I::Ty) -> Self; - fn new_anon_bound(interner: I, debruijn: DebruijnIndex, var: BoundVar, ty: I::Ty) -> Self; + fn new_anon_bound( + interner: I, + debruijn: ty::DebruijnIndex, + var: ty::BoundVar, + ty: I::Ty, + ) -> Self; - fn new_unevaluated(interner: I, uv: UnevaluatedConst<I>, ty: I::Ty) -> Self; + fn new_unevaluated(interner: I, uv: ty::UnevaluatedConst<I>, ty: I::Ty) -> Self; fn ty(self) -> I::Ty; } @@ -100,6 +116,12 @@ pub trait GenericArgs<I: Interner<GenericArgs = Self>>: fn type_at(self, i: usize) -> I::Ty; fn identity_for_item(interner: I, def_id: I::DefId) -> I::GenericArgs; + + fn extend_with_error( + tcx: I, + def_id: I::DefId, + original_args: &[I::GenericArg], + ) -> I::GenericArgs; } pub trait Predicate<I: Interner<Predicate = Self>>: @@ -108,14 +130,25 @@ pub trait Predicate<I: Interner<Predicate = Self>>: fn is_coinductive(self, interner: I) -> bool; } +pub trait Clause<I: Interner<Clause = Self>>: + Copy + + Debug + + Hash + + Eq + // FIXME: Remove these, uplift the `Upcast` impls. + + UpcastFrom<I, ty::Binder<I, ty::TraitRef<I>>> + + UpcastFrom<I, ty::Binder<I, ty::ProjectionPredicate<I>>> +{ +} + /// Common capabilities of placeholder kinds pub trait PlaceholderLike: Copy + Debug + Hash + Eq { - fn universe(self) -> UniverseIndex; - fn var(self) -> BoundVar; + fn universe(self) -> ty::UniverseIndex; + fn var(self) -> ty::BoundVar; - fn with_updated_universe(self, ui: UniverseIndex) -> Self; + fn with_updated_universe(self, ui: ty::UniverseIndex) -> Self; - fn new(ui: UniverseIndex, var: BoundVar) -> Self; + fn new(ui: ty::UniverseIndex, var: ty::BoundVar) -> Self; } pub trait IntoKind { @@ -124,12 +157,8 @@ pub trait IntoKind { fn kind(self) -> Self::Kind; } -pub trait BoundVars<I: Interner> { - fn bound_vars(&self) -> I::BoundVars; - - fn has_no_bound_vars(&self) -> bool; -} - pub trait BoundVarLike<I: Interner> { - fn var(self) -> BoundVar; + fn var(self) -> ty::BoundVar; + + fn assert_eq(self, var: I::BoundVarKind); } diff --git a/compiler/rustc_type_ir/src/interner.rs b/compiler/rustc_type_ir/src/interner.rs index 6516d5b1645..9b8bb210ff4 100644 --- a/compiler/rustc_type_ir/src/interner.rs +++ b/compiler/rustc_type_ir/src/interner.rs @@ -28,19 +28,28 @@ pub trait Interner: + IrPrint<CoercePredicate<Self>> + IrPrint<FnSig<Self>> { - type DefId: Copy + Debug + Hash + Eq; + type DefId: Copy + Debug + Hash + Eq + TypeVisitable<Self>; type AdtDef: Copy + Debug + Hash + Eq; type GenericArgs: GenericArgs<Self>; /// The slice of args for a specific item. For a GAT like `type Foo<'a>`, it will be `['a]`, /// not including the args from the parent item (trait or impl). type OwnItemArgs: Copy + Debug + Hash + Eq; - type GenericArg: Copy + DebugWithInfcx<Self> + Hash + Eq + IntoKind<Kind = GenericArgKind<Self>>; - type Term: Copy + Debug + Hash + Eq + IntoKind<Kind = TermKind<Self>>; - - type Binder<T: TypeVisitable<Self>>: BoundVars<Self> + TypeSuperVisitable<Self>; - type BoundVars: IntoIterator<Item = Self::BoundVar>; - type BoundVar; + type GenericArg: Copy + + DebugWithInfcx<Self> + + Hash + + Eq + + IntoKind<Kind = GenericArgKind<Self>> + + TypeVisitable<Self>; + type Term: Copy + Debug + Hash + Eq + IntoKind<Kind = TermKind<Self>> + TypeVisitable<Self>; + + type BoundVarKinds: Copy + + Debug + + Hash + + Eq + + Deref<Target: Deref<Target = [Self::BoundVarKind]>> + + Default; + type BoundVarKind: Copy + Debug + Hash + Eq; type CanonicalVars: Copy + Debug + Hash + Eq + IntoIterator<Item = CanonicalVarInfo<Self>>; type PredefinedOpaques: Copy + Debug + Hash + Eq; @@ -51,7 +60,7 @@ pub trait Interner: // Kinds of tys type Ty: Ty<Self>; type Tys: Tys<Self>; - type FnInputTys: Copy + Debug + Hash + Eq + Deref<Target = [Self::Ty]>; + type FnInputTys: Copy + Debug + Hash + Eq + Deref<Target = [Self::Ty]> + TypeVisitable<Self>; type ParamTy: Copy + Debug + Hash + Eq; type BoundTy: Copy + Debug + Hash + Eq + BoundVarLike<Self>; type PlaceholderTy: PlaceholderLike; @@ -67,7 +76,6 @@ pub trait Interner: // Kinds of consts type Const: Const<Self>; - type AliasConst: Copy + DebugWithInfcx<Self> + Hash + Eq; type PlaceholderConst: PlaceholderLike; type ParamConst: Copy + Debug + Hash + Eq; type BoundConst: Copy + Debug + Hash + Eq + BoundVarLike<Self>; @@ -84,14 +92,7 @@ pub trait Interner: // Predicates type ParamEnv: Copy + Debug + Hash + Eq; type Predicate: Predicate<Self>; - type TraitPredicate: Copy + Debug + Hash + Eq; - type RegionOutlivesPredicate: Copy + Debug + Hash + Eq; - type TypeOutlivesPredicate: Copy + Debug + Hash + Eq; - type ProjectionPredicate: Copy + Debug + Hash + Eq; - type NormalizesTo: Copy + Debug + Hash + Eq; - type SubtypePredicate: Copy + Debug + Hash + Eq; - type CoercePredicate: Copy + Debug + Hash + Eq; - type ClosureKind: Copy + Debug + Hash + Eq; + type Clause: Clause<Self>; type Clauses: Copy + Debug + Hash + Eq + TypeSuperVisitable<Self> + Flags; fn mk_canonical_var_infos(self, infos: &[CanonicalVarInfo<Self>]) -> Self::CanonicalVars; diff --git a/compiler/rustc_type_ir/src/ir_print.rs b/compiler/rustc_type_ir/src/ir_print.rs index af4b9eef14b..d57d0816680 100644 --- a/compiler/rustc_type_ir/src/ir_print.rs +++ b/compiler/rustc_type_ir/src/ir_print.rs @@ -1,8 +1,9 @@ use std::fmt; use crate::{ - AliasTerm, AliasTy, CoercePredicate, ExistentialProjection, ExistentialTraitRef, FnSig, - Interner, NormalizesTo, ProjectionPredicate, SubtypePredicate, TraitPredicate, TraitRef, + AliasTerm, AliasTy, Binder, CoercePredicate, ExistentialProjection, ExistentialTraitRef, FnSig, + Interner, NormalizesTo, OutlivesPredicate, ProjectionPredicate, SubtypePredicate, + TraitPredicate, TraitRef, }; pub trait IrPrint<T> { @@ -22,6 +23,15 @@ macro_rules! define_display_via_print { } } +impl<I: Interner, T> fmt::Display for Binder<I, T> +where + I: IrPrint<Binder<I, T>>, +{ + fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result { + <I as IrPrint<Binder<I, T>>>::print(self, fmt) + } +} + macro_rules! define_debug_via_print { ($($ty:ident),+ $(,)?) => { $( @@ -49,3 +59,12 @@ define_display_via_print!( ); define_debug_via_print!(TraitRef, ExistentialTraitRef, ExistentialProjection); + +impl<I: Interner, T> fmt::Display for OutlivesPredicate<I, T> +where + I: IrPrint<OutlivesPredicate<I, T>>, +{ + fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result { + <I as IrPrint<OutlivesPredicate<I, T>>>::print(self, fmt) + } +} diff --git a/compiler/rustc_type_ir/src/lib.rs b/compiler/rustc_type_ir/src/lib.rs index fa9bda9a2f7..4a461b5b5f3 100644 --- a/compiler/rustc_type_ir/src/lib.rs +++ b/compiler/rustc_type_ir/src/lib.rs @@ -9,9 +9,13 @@ extern crate self as rustc_type_ir; #[cfg(feature = "nightly")] +use rustc_data_structures::sso::SsoHashSet; +#[cfg(feature = "nightly")] use rustc_data_structures::sync::Lrc; #[cfg(feature = "nightly")] use rustc_macros::{Decodable, Encodable, HashStable_NoContext}; +#[cfg(not(feature = "nightly"))] +use std::collections::HashSet as SsoHashSet; use std::fmt; use std::hash::Hash; #[cfg(not(feature = "nightly"))] @@ -31,6 +35,7 @@ pub mod ty_kind; #[macro_use] mod macros; +mod binder; mod canonical; mod const_kind; mod debug; @@ -43,6 +48,7 @@ mod predicate_kind; mod region_kind; mod upcast; +pub use binder::*; pub use canonical::*; #[cfg(feature = "nightly")] pub use codec::*; @@ -374,6 +380,10 @@ impl<I: Interner> inherent::BoundVarLike<I> for BoundVar { fn var(self) -> BoundVar { self } + + fn assert_eq(self, _var: I::BoundVarKind) { + unreachable!("FIXME: We really should have a separate `BoundConst` for consts") + } } /// Represents the various closure traits in the language. This diff --git a/compiler/rustc_type_ir/src/predicate.rs b/compiler/rustc_type_ir/src/predicate.rs index c0619d782c6..4e12c6b3d67 100644 --- a/compiler/rustc_type_ir/src/predicate.rs +++ b/compiler/rustc_type_ir/src/predicate.rs @@ -6,10 +6,38 @@ use rustc_macros::{Decodable, Encodable, HashStable_NoContext, TyDecodable, TyEn use rustc_type_ir_macros::{Lift_Generic, TypeFoldable_Generic, TypeVisitable_Generic}; use crate::inherent::*; +use crate::lift::Lift; +use crate::upcast::Upcast; use crate::visit::TypeVisitableExt as _; -use crate::{ - AliasTy, AliasTyKind, DebugWithInfcx, InferCtxtLike, Interner, UnevaluatedConst, WithInfcx, -}; +use crate::{self as ty, DebugWithInfcx, InferCtxtLike, Interner, WithInfcx}; + +/// `A: 'region` +#[derive(derivative::Derivative)] +#[derivative( + Clone(bound = "A: Clone"), + Copy(bound = "A: Copy"), + Hash(bound = "A: Hash"), + PartialEq(bound = "A: PartialEq"), + Eq(bound = "A: Eq"), + Debug(bound = "A: fmt::Debug") +)] +#[derive(TypeVisitable_Generic, TypeFoldable_Generic)] +#[cfg_attr(feature = "nightly", derive(TyDecodable, TyEncodable, HashStable_NoContext))] +pub struct OutlivesPredicate<I: Interner, A>(pub A, pub I::Region); + +// FIXME: We manually derive `Lift` because the `derive(Lift_Generic)` doesn't +// understand how to turn `A` to `A::Lifted` in the output `type Lifted`. +impl<I: Interner, U: Interner, A> Lift<U> for OutlivesPredicate<I, A> +where + A: Lift<U>, + I::Region: Lift<U, Lifted = U::Region>, +{ + type Lifted = OutlivesPredicate<U, A::Lifted>; + + fn lift_to_tcx(self, tcx: U) -> Option<Self::Lifted> { + Some(OutlivesPredicate(self.0.lift_to_tcx(tcx)?, self.1.lift_to_tcx(tcx)?)) + } +} /// A complete reference to a trait. These take numerous guises in syntax, /// but perhaps the most recognizable form is in a where-clause: @@ -75,6 +103,16 @@ impl<I: Interner> TraitRef<I> { } } +impl<I: Interner> ty::Binder<I, TraitRef<I>> { + pub fn self_ty(&self) -> ty::Binder<I, I::Ty> { + self.map_bound_ref(|tr| tr.self_ty()) + } + + pub fn def_id(&self) -> I::DefId { + self.skip_binder().def_id + } +} + #[derive(derivative::Derivative)] #[derivative( Clone(bound = ""), @@ -112,6 +150,22 @@ impl<I: Interner> TraitPredicate<I> { } } +impl<I: Interner> ty::Binder<I, TraitPredicate<I>> { + pub fn def_id(self) -> I::DefId { + // Ok to skip binder since trait `DefId` does not care about regions. + self.skip_binder().def_id() + } + + pub fn self_ty(self) -> ty::Binder<I, I::Ty> { + self.map_bound(|trait_ref| trait_ref.self_ty()) + } + + #[inline] + pub fn polarity(self) -> PredicatePolarity { + self.skip_binder().polarity + } +} + impl<I: Interner> fmt::Debug for TraitPredicate<I> { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { // FIXME(effects) printing? @@ -204,6 +258,34 @@ impl<I: Interner> DebugWithInfcx<I> for ExistentialPredicate<I> { } } +impl<I: Interner> ty::Binder<I, ExistentialPredicate<I>> { + /// Given an existential predicate like `?Self: PartialEq<u32>` (e.g., derived from `dyn PartialEq<u32>`), + /// and a concrete type `self_ty`, returns a full predicate where the existentially quantified variable `?Self` + /// has been replaced with `self_ty` (e.g., `self_ty: PartialEq<u32>`, in our example). + pub fn with_self_ty(&self, tcx: I, self_ty: I::Ty) -> I::Clause { + match self.skip_binder() { + ExistentialPredicate::Trait(tr) => { + self.rebind(tr).with_self_ty(tcx, self_ty).upcast(tcx) + } + ExistentialPredicate::Projection(p) => { + self.rebind(p.with_self_ty(tcx, self_ty)).upcast(tcx) + } + ExistentialPredicate::AutoTrait(did) => { + let generics = tcx.generics_of(did); + let trait_ref = if generics.count() == 1 { + ty::TraitRef::new(tcx, did, [self_ty]) + } else { + // If this is an ill-formed auto trait, then synthesize + // new error args for the missing generics. + let err_args = GenericArgs::extend_with_error(tcx, did, &[self_ty.into()]); + ty::TraitRef::new(tcx, did, err_args) + }; + self.rebind(trait_ref).upcast(tcx) + } + } + } +} + /// An existential reference to a trait, where `Self` is erased. /// For example, the trait object `Trait<'a, 'b, X, Y>` is: /// ```ignore (illustrative) @@ -253,6 +335,20 @@ impl<I: Interner> ExistentialTraitRef<I> { } } +impl<I: Interner> ty::Binder<I, ExistentialTraitRef<I>> { + pub fn def_id(&self) -> I::DefId { + self.skip_binder().def_id + } + + /// Object types don't have a self type specified. Therefore, when + /// we convert the principal trait-ref into a normal trait-ref, + /// you must give *some* self type. A common choice is `mk_err()` + /// or some placeholder type. + pub fn with_self_ty(&self, tcx: I, self_ty: I::Ty) -> ty::Binder<I, TraitRef<I>> { + self.map_bound(|trait_ref| trait_ref.with_self_ty(tcx, self_ty)) + } +} + /// A `ProjectionPredicate` for an `ExistentialTraitRef`. #[derive(derivative::Derivative)] #[derivative( @@ -308,6 +404,16 @@ impl<I: Interner> ExistentialProjection<I> { } } +impl<I: Interner> ty::Binder<I, ExistentialProjection<I>> { + pub fn with_self_ty(&self, tcx: I, self_ty: I::Ty) -> ty::Binder<I, ProjectionPredicate<I>> { + self.map_bound(|p| p.with_self_ty(tcx, self_ty)) + } + + pub fn item_def_id(&self) -> I::DefId { + self.skip_binder().def_id + } +} + #[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)] #[cfg_attr(feature = "nightly", derive(Encodable, Decodable, HashStable_NoContext))] pub enum AliasTermKind { @@ -414,7 +520,7 @@ impl<I: Interner> AliasTerm<I> { AliasTerm { def_id, args, _use_alias_term_new_instead: () } } - pub fn expect_ty(self, interner: I) -> AliasTy<I> { + pub fn expect_ty(self, interner: I) -> ty::AliasTy<I> { match self.kind(interner) { AliasTermKind::ProjectionTy | AliasTermKind::InherentTy @@ -424,7 +530,7 @@ impl<I: Interner> AliasTerm<I> { panic!("Cannot turn `UnevaluatedConst` into `AliasTy`") } } - AliasTy { def_id: self.def_id, args: self.args, _use_alias_ty_new_instead: () } + ty::AliasTy { def_id: self.def_id, args: self.args, _use_alias_ty_new_instead: () } } pub fn kind(self, interner: I) -> AliasTermKind { @@ -435,32 +541,32 @@ impl<I: Interner> AliasTerm<I> { match self.kind(interner) { AliasTermKind::ProjectionTy => Ty::new_alias( interner, - AliasTyKind::Projection, - AliasTy { def_id: self.def_id, args: self.args, _use_alias_ty_new_instead: () }, + ty::AliasTyKind::Projection, + ty::AliasTy { def_id: self.def_id, args: self.args, _use_alias_ty_new_instead: () }, ) .into(), AliasTermKind::InherentTy => Ty::new_alias( interner, - AliasTyKind::Inherent, - AliasTy { def_id: self.def_id, args: self.args, _use_alias_ty_new_instead: () }, + ty::AliasTyKind::Inherent, + ty::AliasTy { def_id: self.def_id, args: self.args, _use_alias_ty_new_instead: () }, ) .into(), AliasTermKind::OpaqueTy => Ty::new_alias( interner, - AliasTyKind::Opaque, - AliasTy { def_id: self.def_id, args: self.args, _use_alias_ty_new_instead: () }, + ty::AliasTyKind::Opaque, + ty::AliasTy { def_id: self.def_id, args: self.args, _use_alias_ty_new_instead: () }, ) .into(), AliasTermKind::WeakTy => Ty::new_alias( interner, - AliasTyKind::Weak, - AliasTy { def_id: self.def_id, args: self.args, _use_alias_ty_new_instead: () }, + ty::AliasTyKind::Weak, + ty::AliasTy { def_id: self.def_id, args: self.args, _use_alias_ty_new_instead: () }, ) .into(), AliasTermKind::UnevaluatedConst | AliasTermKind::ProjectionConst => { I::Const::new_unevaluated( interner, - UnevaluatedConst::new(self.def_id, self.args), + ty::UnevaluatedConst::new(self.def_id, self.args), interner.type_of_instantiated(self.def_id, self.args), ) .into() @@ -514,14 +620,14 @@ impl<I: Interner> AliasTerm<I> { } } -impl<I: Interner> From<AliasTy<I>> for AliasTerm<I> { - fn from(ty: AliasTy<I>) -> Self { +impl<I: Interner> From<ty::AliasTy<I>> for AliasTerm<I> { + fn from(ty: ty::AliasTy<I>) -> Self { AliasTerm { args: ty.args, def_id: ty.def_id, _use_alias_term_new_instead: () } } } -impl<I: Interner> From<UnevaluatedConst<I>> for AliasTerm<I> { - fn from(ct: UnevaluatedConst<I>) -> Self { +impl<I: Interner> From<ty::UnevaluatedConst<I>> for AliasTerm<I> { + fn from(ct: ty::UnevaluatedConst<I>) -> Self { AliasTerm { args: ct.args, def_id: ct.def, _use_alias_term_new_instead: () } } } @@ -571,6 +677,40 @@ impl<I: Interner> ProjectionPredicate<I> { } } +impl<I: Interner> ty::Binder<I, ProjectionPredicate<I>> { + /// Returns the `DefId` of the trait of the associated item being projected. + #[inline] + pub fn trait_def_id(&self, tcx: I) -> I::DefId { + self.skip_binder().projection_term.trait_def_id(tcx) + } + + /// Get the trait ref required for this projection to be well formed. + /// Note that for generic associated types the predicates of the associated + /// type also need to be checked. + #[inline] + pub fn required_poly_trait_ref(&self, tcx: I) -> ty::Binder<I, TraitRef<I>> { + // Note: unlike with `TraitRef::to_poly_trait_ref()`, + // `self.0.trait_ref` is permitted to have escaping regions. + // This is because here `self` has a `Binder` and so does our + // return value, so we are preserving the number of binding + // levels. + self.map_bound(|predicate| predicate.projection_term.trait_ref(tcx)) + } + + pub fn term(&self) -> ty::Binder<I, I::Term> { + self.map_bound(|predicate| predicate.term) + } + + /// The `DefId` of the `TraitItem` for the associated type. + /// + /// Note that this is not the `DefId` of the `TraitRef` containing this + /// associated type, which is in `tcx.associated_item(projection_def_id()).container`. + pub fn projection_def_id(&self) -> I::DefId { + // Ok to skip binder since trait `DefId` does not care about regions. + self.skip_binder().projection_term.def_id + } +} + impl<I: Interner> fmt::Debug for ProjectionPredicate<I> { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { write!(f, "ProjectionPredicate({:?}, {:?})", self.projection_term, self.term) diff --git a/compiler/rustc_type_ir/src/predicate_kind.rs b/compiler/rustc_type_ir/src/predicate_kind.rs index c477ab14153..efe270ed608 100644 --- a/compiler/rustc_type_ir/src/predicate_kind.rs +++ b/compiler/rustc_type_ir/src/predicate_kind.rs @@ -3,7 +3,7 @@ use rustc_macros::{Decodable, Encodable, HashStable_NoContext, TyDecodable, TyEn use rustc_type_ir_macros::{TypeFoldable_Generic, TypeVisitable_Generic}; use std::fmt; -use crate::Interner; +use crate::{self as ty, Interner}; /// A clause is something that can appear in where bounds or be inferred /// by implied bounds. @@ -15,17 +15,17 @@ pub enum ClauseKind<I: Interner> { /// Corresponds to `where Foo: Bar<A, B, C>`. `Foo` here would be /// the `Self` type of the trait reference and `A`, `B`, and `C` /// would be the type parameters. - Trait(I::TraitPredicate), + Trait(ty::TraitPredicate<I>), - /// `where 'a: 'b` - RegionOutlives(I::RegionOutlivesPredicate), + /// `where 'a: 'r` + RegionOutlives(ty::OutlivesPredicate<I, I::Region>), - /// `where T: 'a` - TypeOutlives(I::TypeOutlivesPredicate), + /// `where T: 'r` + TypeOutlives(ty::OutlivesPredicate<I, I::Ty>), /// `where <T as TraitRef>::Name == X`, approximately. /// See the `ProjectionPredicate` struct for details. - Projection(I::ProjectionPredicate), + Projection(ty::ProjectionPredicate<I>), /// Ensures that a const generic argument to a parameter `const N: u8` /// is of type `u8`. @@ -75,7 +75,7 @@ pub enum PredicateKind<I: Interner> { /// This obligation is created most often when we have two /// unresolved type variables and hence don't have enough /// information to process the subtyping obligation yet. - Subtype(I::SubtypePredicate), + Subtype(ty::SubtypePredicate<I>), /// `T1` coerced to `T2` /// @@ -85,7 +85,7 @@ pub enum PredicateKind<I: Interner> { /// obligation yet. At the moment, we actually process coercions /// very much like subtyping and don't handle the full coercion /// logic. - Coerce(I::CoercePredicate), + Coerce(ty::CoercePredicate<I>), /// Constants must be equal. The first component is the const that is expected. ConstEquate(I::Const, I::Const), @@ -102,7 +102,7 @@ pub enum PredicateKind<I: Interner> { /// `T as Trait>::Assoc`, `Projection(<T as Trait>::Assoc, ?x)` constrains `?x` /// to `<T as Trait>::Assoc` while `NormalizesTo(<T as Trait>::Assoc, ?x)` /// results in `NoSolution`. - NormalizesTo(I::NormalizesTo), + NormalizesTo(ty::NormalizesTo<I>), /// Separate from `ClauseKind::Projection` which is used for normalization in new solver. /// This predicate requires two terms to be equal to eachother. diff --git a/compiler/rustc_type_ir/src/ty_kind.rs b/compiler/rustc_type_ir/src/ty_kind.rs index 629ea9fb839..38082bf3c16 100644 --- a/compiler/rustc_type_ir/src/ty_kind.rs +++ b/compiler/rustc_type_ir/src/ty_kind.rs @@ -8,7 +8,7 @@ use rustc_type_ir_macros::{Lift_Generic, TypeFoldable_Generic, TypeVisitable_Gen use std::fmt; use crate::inherent::*; -use crate::{DebruijnIndex, DebugWithInfcx, InferCtxtLike, Interner, TraitRef, WithInfcx}; +use crate::{self as ty, DebruijnIndex, DebugWithInfcx, InferCtxtLike, Interner, WithInfcx}; use self::TyKind::*; @@ -514,7 +514,7 @@ impl<I: Interner> AliasTy<I> { /// For example, if this is a projection of `<T as StreamingIterator>::Item<'a>`, /// then this function would return a `T: StreamingIterator` trait reference and /// `['a]` as the own args. - pub fn trait_ref_and_own_args(self, interner: I) -> (TraitRef<I>, I::OwnItemArgs) { + pub fn trait_ref_and_own_args(self, interner: I) -> (ty::TraitRef<I>, I::OwnItemArgs) { debug_assert_eq!(self.kind(interner), AliasTyKind::Projection); interner.trait_ref_and_own_args_for_alias(self.def_id, self.args) } @@ -526,7 +526,7 @@ impl<I: Interner> AliasTy<I> { /// WARNING: This will drop the args for generic associated types /// consider calling [Self::trait_ref_and_own_args] to get those /// as well. - pub fn trait_ref(self, interner: I) -> TraitRef<I> { + pub fn trait_ref(self, interner: I) -> ty::TraitRef<I> { self.trait_ref_and_own_args(interner).0 } } @@ -982,6 +982,49 @@ impl<I: Interner> FnSig<I> { pub fn output(self) -> I::Ty { self.split_inputs_and_output().1 } + + pub fn is_fn_trait_compatible(self) -> bool { + let FnSig { safety, abi, c_variadic, .. } = self; + !c_variadic && safety.is_safe() && abi.is_rust() + } +} + +impl<I: Interner> ty::Binder<I, FnSig<I>> { + #[inline] + pub fn inputs(self) -> ty::Binder<I, I::FnInputTys> { + self.map_bound(|fn_sig| fn_sig.inputs()) + } + + #[inline] + #[track_caller] + pub fn input(self, index: usize) -> ty::Binder<I, I::Ty> { + self.map_bound(|fn_sig| fn_sig.inputs()[index]) + } + + pub fn inputs_and_output(self) -> ty::Binder<I, I::Tys> { + self.map_bound(|fn_sig| fn_sig.inputs_and_output) + } + + #[inline] + pub fn output(self) -> ty::Binder<I, I::Ty> { + self.map_bound(|fn_sig| fn_sig.output()) + } + + pub fn c_variadic(self) -> bool { + self.skip_binder().c_variadic + } + + pub fn safety(self) -> I::Safety { + self.skip_binder().safety + } + + pub fn abi(self) -> I::Abi { + self.skip_binder().abi + } + + pub fn is_fn_trait_compatible(&self) -> bool { + self.skip_binder().is_fn_trait_compatible() + } } impl<I: Interner> fmt::Debug for FnSig<I> { diff --git a/compiler/rustc_type_ir/src/visit.rs b/compiler/rustc_type_ir/src/visit.rs index 3d4125f600e..6880c7b8cef 100644 --- a/compiler/rustc_type_ir/src/visit.rs +++ b/compiler/rustc_type_ir/src/visit.rs @@ -90,7 +90,7 @@ pub trait TypeVisitor<I: Interner>: Sized { #[cfg(not(feature = "nightly"))] type Result: VisitorResult; - fn visit_binder<T: TypeVisitable<I>>(&mut self, t: &I::Binder<T>) -> Self::Result { + fn visit_binder<T: TypeVisitable<I>>(&mut self, t: &ty::Binder<I, T>) -> Self::Result { t.super_visit_with(self) } @@ -376,11 +376,11 @@ impl std::fmt::Debug for HasTypeFlagsVisitor { impl<I: Interner> TypeVisitor<I> for HasTypeFlagsVisitor { type Result = ControlFlow<FoundFlags>; - fn visit_binder<T: TypeVisitable<I>>(&mut self, t: &I::Binder<T>) -> Self::Result { + fn visit_binder<T: TypeVisitable<I>>(&mut self, t: &ty::Binder<I, T>) -> Self::Result { // If we're looking for the HAS_BINDER_VARS flag, check if the // binder has vars. This won't be present in the binder's bound // value, so we need to check here too. - if self.flags.intersects(TypeFlags::HAS_BINDER_VARS) && !t.has_no_bound_vars() { + if self.flags.intersects(TypeFlags::HAS_BINDER_VARS) && !t.bound_vars().is_empty() { return ControlFlow::Break(FoundFlags); } @@ -476,7 +476,7 @@ struct HasEscapingVarsVisitor { impl<I: Interner> TypeVisitor<I> for HasEscapingVarsVisitor { type Result = ControlFlow<FoundEscapingVars>; - fn visit_binder<T: TypeVisitable<I>>(&mut self, t: &I::Binder<T>) -> Self::Result { + fn visit_binder<T: TypeVisitable<I>>(&mut self, t: &ty::Binder<I, T>) -> Self::Result { self.outer_index.shift_in(1); let result = t.super_visit_with(self); self.outer_index.shift_out(1); diff --git a/compiler/stable_mir/src/ty.rs b/compiler/stable_mir/src/ty.rs index 759e3f166bd..321c56b623a 100644 --- a/compiler/stable_mir/src/ty.rs +++ b/compiler/stable_mir/src/ty.rs @@ -1205,6 +1205,7 @@ pub struct TraitDecl { pub is_marker: bool, pub is_coinductive: bool, pub skip_array_during_method_dispatch: bool, + pub skip_boxed_slice_during_method_dispatch: bool, pub specialization_kind: TraitSpecializationKind, pub must_implement_one_of: Option<Vec<Ident>>, pub implement_via_object: bool, |