diff options
Diffstat (limited to 'src')
29 files changed, 453 insertions, 323 deletions
diff --git a/src/libcore/macros.rs b/src/libcore/macros.rs index 131fb52e2d2..726d187d2e9 100644 --- a/src/libcore/macros.rs +++ b/src/libcore/macros.rs @@ -1274,6 +1274,10 @@ pub(crate) mod builtin { } /// Inline assembly. + /// + /// Read the [unstable book] for the usage. + /// + /// [unstable book]: ../unstable-book/library-features/asm.html #[unstable(feature = "asm", issue = "29722", reason = "inline assembly is not stable enough for use and is subject to change")] #[rustc_builtin_macro] diff --git a/src/libfmt_macros/lib.rs b/src/libfmt_macros/lib.rs index d22420e76dc..24b19028ac1 100644 --- a/src/libfmt_macros/lib.rs +++ b/src/libfmt_macros/lib.rs @@ -35,7 +35,7 @@ impl InnerOffset { /// A piece is a portion of the format string which represents the next part /// to emit. These are emitted as a stream by the `Parser` class. -#[derive(Copy, Clone, PartialEq)] +#[derive(Copy, Clone, Debug, PartialEq)] pub enum Piece<'a> { /// A literal string which should directly be emitted String(&'a str), @@ -45,7 +45,7 @@ pub enum Piece<'a> { } /// Representation of an argument specification. -#[derive(Copy, Clone, PartialEq)] +#[derive(Copy, Clone, Debug, PartialEq)] pub struct Argument<'a> { /// Where to find this argument pub position: Position, @@ -54,7 +54,7 @@ pub struct Argument<'a> { } /// Specification for the formatting of an argument in the format string. -#[derive(Copy, Clone, PartialEq)] +#[derive(Copy, Clone, Debug, PartialEq)] pub struct FormatSpec<'a> { /// Optionally specified character to fill alignment with. pub fill: Option<char>, @@ -74,10 +74,12 @@ pub struct FormatSpec<'a> { /// this argument, this can be empty or any number of characters, although /// it is required to be one word. pub ty: &'a str, + /// The span of the descriptor string (for diagnostics). + pub ty_span: Option<InnerSpan>, } /// Enum describing where an argument for a format can be located. -#[derive(Copy, Clone, PartialEq)] +#[derive(Copy, Clone, Debug, PartialEq)] pub enum Position { /// The argument is implied to be located at an index ArgumentImplicitlyIs(usize), @@ -97,7 +99,7 @@ impl Position { } /// Enum of alignments which are supported. -#[derive(Copy, Clone, PartialEq)] +#[derive(Copy, Clone, Debug, PartialEq)] pub enum Alignment { /// The value will be aligned to the left. AlignLeft, @@ -111,7 +113,7 @@ pub enum Alignment { /// Various flags which can be applied to format strings. The meaning of these /// flags is defined by the formatters themselves. -#[derive(Copy, Clone, PartialEq)] +#[derive(Copy, Clone, Debug, PartialEq)] pub enum Flag { /// A `+` will be used to denote positive numbers. FlagSignPlus, @@ -131,7 +133,7 @@ pub enum Flag { /// A count is used for the precision and width parameters of an integer, and /// can reference either an argument or a literal integer. -#[derive(Copy, Clone, PartialEq)] +#[derive(Copy, Clone, Debug, PartialEq)] pub enum Count { /// The count is specified explicitly. CountIs(usize), @@ -475,6 +477,7 @@ impl<'a> Parser<'a> { width: CountImplied, width_span: None, ty: &self.input[..0], + ty_span: None, }; if !self.consume(':') { return spec; @@ -548,6 +551,7 @@ impl<'a> Parser<'a> { spec.precision_span = sp; } } + let ty_span_start = self.cur.peek().map(|(pos, _)| *pos); // Optional radix followed by the actual format specifier if self.consume('x') { if self.consume('?') { @@ -567,6 +571,12 @@ impl<'a> Parser<'a> { spec.ty = "?"; } else { spec.ty = self.word(); + let ty_span_end = self.cur.peek().map(|(pos, _)| *pos); + if !spec.ty.is_empty() { + spec.ty_span = ty_span_start + .and_then(|s| ty_span_end.map(|e| (s, e))) + .map(|(start, end)| self.to_span_index(start).to(self.to_span_index(end))); + } } spec } diff --git a/src/libfmt_macros/tests.rs b/src/libfmt_macros/tests.rs index e2ddb8810e9..81359033eda 100644 --- a/src/libfmt_macros/tests.rs +++ b/src/libfmt_macros/tests.rs @@ -2,7 +2,7 @@ use super::*; fn same(fmt: &'static str, p: &[Piece<'static>]) { let parser = Parser::new(fmt, None, vec![], false); - assert!(parser.collect::<Vec<Piece<'static>>>() == p); + assert_eq!(parser.collect::<Vec<Piece<'static>>>(), p); } fn fmtdflt() -> FormatSpec<'static> { @@ -15,6 +15,7 @@ fn fmtdflt() -> FormatSpec<'static> { precision_span: None, width_span: None, ty: "", + ty_span: None, }; } @@ -82,7 +83,7 @@ fn format_position_nothing_else() { #[test] fn format_type() { same( - "{3:a}", + "{3:x}", &[NextArgument(Argument { position: ArgumentIs(3), format: FormatSpec { @@ -93,7 +94,8 @@ fn format_type() { width: CountImplied, precision_span: None, width_span: None, - ty: "a", + ty: "x", + ty_span: None, }, })]); } @@ -112,6 +114,7 @@ fn format_align_fill() { precision_span: None, width_span: None, ty: "", + ty_span: None, }, })]); same( @@ -127,6 +130,7 @@ fn format_align_fill() { precision_span: None, width_span: None, ty: "", + ty_span: None, }, })]); same( @@ -142,6 +146,7 @@ fn format_align_fill() { precision_span: None, width_span: None, ty: "abcd", + ty_span: Some(InnerSpan::new(6, 10)), }, })]); } @@ -150,7 +155,7 @@ fn format_counts() { use syntax_pos::{GLOBALS, Globals, edition}; GLOBALS.set(&Globals::new(edition::DEFAULT_EDITION), || { same( - "{:10s}", + "{:10x}", &[NextArgument(Argument { position: ArgumentImplicitlyIs(0), format: FormatSpec { @@ -161,11 +166,12 @@ fn format_counts() { width: CountIs(10), precision_span: None, width_span: None, - ty: "s", + ty: "x", + ty_span: None, }, })]); same( - "{:10$.10s}", + "{:10$.10x}", &[NextArgument(Argument { position: ArgumentImplicitlyIs(0), format: FormatSpec { @@ -176,11 +182,12 @@ fn format_counts() { width: CountIsParam(10), precision_span: None, width_span: Some(InnerSpan::new(3, 6)), - ty: "s", + ty: "x", + ty_span: None, }, })]); same( - "{:.*s}", + "{:.*x}", &[NextArgument(Argument { position: ArgumentImplicitlyIs(1), format: FormatSpec { @@ -191,11 +198,12 @@ fn format_counts() { width: CountImplied, precision_span: Some(InnerSpan::new(3, 5)), width_span: None, - ty: "s", + ty: "x", + ty_span: None, }, })]); same( - "{:.10$s}", + "{:.10$x}", &[NextArgument(Argument { position: ArgumentImplicitlyIs(0), format: FormatSpec { @@ -206,11 +214,12 @@ fn format_counts() { width: CountImplied, precision_span: Some(InnerSpan::new(3, 7)), width_span: None, - ty: "s", + ty: "x", + ty_span: None, }, })]); same( - "{:a$.b$s}", + "{:a$.b$?}", &[NextArgument(Argument { position: ArgumentImplicitlyIs(0), format: FormatSpec { @@ -221,7 +230,8 @@ fn format_counts() { width: CountIsName(Symbol::intern("a")), precision_span: None, width_span: None, - ty: "s", + ty: "?", + ty_span: None, }, })]); }); @@ -241,6 +251,7 @@ fn format_flags() { precision_span: None, width_span: None, ty: "", + ty_span: None, }, })]); same( @@ -256,13 +267,14 @@ fn format_flags() { precision_span: None, width_span: None, ty: "", + ty_span: None, }, })]); } #[test] fn format_mixture() { same( - "abcd {3:a} efg", + "abcd {3:x} efg", &[ String("abcd "), NextArgument(Argument { @@ -275,7 +287,8 @@ fn format_mixture() { width: CountImplied, precision_span: None, width_span: None, - ty: "a", + ty: "x", + ty_span: None, }, }), String(" efg"), diff --git a/src/librustc/query/mod.rs b/src/librustc/query/mod.rs index 12ae2c32015..bd7b77b0abb 100644 --- a/src/librustc/query/mod.rs +++ b/src/librustc/query/mod.rs @@ -93,7 +93,7 @@ rustc_queries! { /// Maps DefId's that have an associated `mir::Body` to the result /// of the MIR qualify_consts pass. The actual meaning of /// the value isn't known except to the pass itself. - query mir_const_qualif(key: DefId) -> (u8, &'tcx BitSet<mir::Local>) { + query mir_const_qualif(key: DefId) -> u8 { desc { |tcx| "const checking `{}`", tcx.def_path_str(key) } cache_on_disk_if { key.is_local() } } diff --git a/src/librustc/traits/error_reporting.rs b/src/librustc/traits/error_reporting.rs index 54c01034221..23c4ec062ea 100644 --- a/src/librustc/traits/error_reporting.rs +++ b/src/librustc/traits/error_reporting.rs @@ -2287,11 +2287,14 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> { ); } } - ObligationCauseCode::AssocTypeBound(impl_span, orig) => { - err.span_label(orig, "associated type defined here"); - if let Some(sp) = impl_span { + ObligationCauseCode::AssocTypeBound(ref data) => { + err.span_label(data.original, "associated type defined here"); + if let Some(sp) = data.impl_span { err.span_label(sp, "in this `impl` item"); } + for sp in &data.bounds { + err.span_label(*sp, "restricted in this bound"); + } } } } diff --git a/src/librustc/traits/mod.rs b/src/librustc/traits/mod.rs index b8275299562..a29d8c66d81 100644 --- a/src/librustc/traits/mod.rs +++ b/src/librustc/traits/mod.rs @@ -276,7 +276,14 @@ pub enum ObligationCauseCode<'tcx> { /// #[feature(trivial_bounds)] is not enabled TrivialBound, - AssocTypeBound(/*impl*/ Option<Span>, /*original*/ Span), + AssocTypeBound(Box<AssocTypeBoundData>), +} + +#[derive(Clone, Debug, PartialEq, Eq, Hash)] +pub struct AssocTypeBoundData { + pub impl_span: Option<Span>, + pub original: Span, + pub bounds: Vec<Span>, } // `ObligationCauseCode` is used a lot. Make sure it doesn't unintentionally get bigger. diff --git a/src/librustc/traits/structural_impls.rs b/src/librustc/traits/structural_impls.rs index 109e884f8bd..59f2bb37548 100644 --- a/src/librustc/traits/structural_impls.rs +++ b/src/librustc/traits/structural_impls.rs @@ -549,7 +549,7 @@ impl<'a, 'tcx> Lift<'tcx> for traits::ObligationCauseCode<'a> { super::MethodReceiver => Some(super::MethodReceiver), super::BlockTailExpression(id) => Some(super::BlockTailExpression(id)), super::TrivialBound => Some(super::TrivialBound), - super::AssocTypeBound(impl_sp, sp) => Some(super::AssocTypeBound(impl_sp, sp)), + super::AssocTypeBound(ref data) => Some(super::AssocTypeBound(data.clone())), } } } diff --git a/src/librustc/ty/query/mod.rs b/src/librustc/ty/query/mod.rs index 9b15ad560b5..0615004125b 100644 --- a/src/librustc/ty/query/mod.rs +++ b/src/librustc/ty/query/mod.rs @@ -42,7 +42,6 @@ use crate::util::common::ErrorReported; use crate::util::profiling::ProfileCategory::*; use rustc_data_structures::svh::Svh; -use rustc_index::bit_set::BitSet; use rustc_index::vec::IndexVec; use rustc_data_structures::fx::{FxIndexMap, FxHashMap, FxHashSet}; use rustc_data_structures::stable_hasher::StableVec; diff --git a/src/librustc/ty/wf.rs b/src/librustc/ty/wf.rs index 4ea01bf9647..f9e7a8030a6 100644 --- a/src/librustc/ty/wf.rs +++ b/src/librustc/ty/wf.rs @@ -2,9 +2,10 @@ use crate::hir; use crate::hir::def_id::DefId; use crate::infer::InferCtxt; use crate::ty::subst::SubstsRef; -use crate::traits; +use crate::traits::{self, AssocTypeBoundData}; use crate::ty::{self, ToPredicate, Ty, TyCtxt, TypeFoldable}; use std::iter::once; +use syntax::symbol::{kw, Ident}; use syntax_pos::Span; use crate::middle::lang_items; use crate::mir::interpret::ConstValue; @@ -176,6 +177,23 @@ impl<'a, 'tcx> WfPredicates<'a, 'tcx> { pred: &ty::Predicate<'_>, trait_assoc_items: ty::AssocItemsIterator<'_>, | { + let trait_item = tcx.hir().as_local_hir_id(trait_ref.def_id).and_then(|trait_id| { + tcx.hir().find(trait_id) + }); + let (trait_name, trait_generics) = match trait_item { + Some(hir::Node::Item(hir::Item { + ident, + kind: hir::ItemKind::Trait(.., generics, _, _), + .. + })) | + Some(hir::Node::Item(hir::Item { + ident, + kind: hir::ItemKind::TraitAlias(generics, _), + .. + })) => (Some(ident), Some(generics)), + _ => (None, None), + }; + let item_span = item.map(|i| tcx.sess.source_map().def_span(i.span)); match pred { ty::Predicate::Projection(proj) => { @@ -226,10 +244,11 @@ impl<'a, 'tcx> WfPredicates<'a, 'tcx> { item.ident == trait_assoc_item.ident }).next() { cause.span = impl_item.span; - cause.code = traits::AssocTypeBound( - item_span, - trait_assoc_item.ident.span, - ); + cause.code = traits::AssocTypeBound(Box::new(AssocTypeBoundData { + impl_span: item_span, + original: trait_assoc_item.ident.span, + bounds: vec![], + })); } } } @@ -251,14 +270,13 @@ impl<'a, 'tcx> WfPredicates<'a, 'tcx> { // LL | type Assoc = bool; // | ^^^^^^^^^^^^^^^^^^ the trait `Bar` is not implemented for `bool` // - // FIXME: if the obligation comes from the where clause in the `trait`, we - // should point at it: + // If the obligation comes from the where clause in the `trait`, we point at it: // // error[E0277]: the trait bound `bool: Bar` is not satisfied // --> $DIR/point-at-type-on-obligation-failure-2.rs:8:5 // | // | trait Foo where <Self as Foo>>::Assoc: Bar { - // | -------------------------- obligation set here + // | -------------------------- restricted in this bound // LL | type Assoc; // | ----- associated type defined here // ... @@ -278,11 +296,17 @@ impl<'a, 'tcx> WfPredicates<'a, 'tcx> { .next() .map(|impl_item| (impl_item, trait_assoc_item))) { + let bounds = trait_generics.map(|generics| get_generic_bound_spans( + &generics, + trait_name, + trait_assoc_item.ident, + )).unwrap_or_else(Vec::new); cause.span = impl_item.span; - cause.code = traits::AssocTypeBound( - item_span, - trait_assoc_item.ident.span, - ); + cause.code = traits::AssocTypeBound(Box::new(AssocTypeBoundData { + impl_span: item_span, + original: trait_assoc_item.ident.span, + bounds, + })); } } } @@ -666,3 +690,56 @@ pub fn object_region_bounds<'tcx>( tcx.required_region_bounds(open_ty, predicates) } + +/// Find the span of a generic bound affecting an associated type. +fn get_generic_bound_spans( + generics: &hir::Generics, + trait_name: Option<&Ident>, + assoc_item_name: Ident, +) -> Vec<Span> { + let mut bounds = vec![]; + for clause in generics.where_clause.predicates.iter() { + if let hir::WherePredicate::BoundPredicate(pred) = clause { + match &pred.bounded_ty.kind { + hir::TyKind::Path(hir::QPath::Resolved(Some(ty), path)) => { + let mut s = path.segments.iter(); + if let (a, Some(b), None) = (s.next(), s.next(), s.next()) { + if a.map(|s| &s.ident) == trait_name + && b.ident == assoc_item_name + && is_self_path(&ty.kind) + { + // `<Self as Foo>::Bar` + bounds.push(pred.span); + } + } + } + hir::TyKind::Path(hir::QPath::TypeRelative(ty, segment)) => { + if segment.ident == assoc_item_name { + if is_self_path(&ty.kind) { + // `Self::Bar` + bounds.push(pred.span); + } + } + } + _ => {} + } + } + } + bounds +} + +fn is_self_path(kind: &hir::TyKind) -> bool { + match kind { + hir::TyKind::Path(hir::QPath::Resolved(None, path)) => { + let mut s = path.segments.iter(); + if let (Some(segment), None) = (s.next(), s.next()) { + if segment.ident.name == kw::SelfUpper { + // `type(Self)` + return true; + } + } + } + _ => {} + } + false +} diff --git a/src/librustc_driver/args.rs b/src/librustc_driver/args.rs index 0906d358bad..339a10f9140 100644 --- a/src/librustc_driver/args.rs +++ b/src/librustc_driver/args.rs @@ -3,22 +3,12 @@ use std::fmt; use std::fs; use std::io; use std::str; -use std::sync::atomic::{AtomicBool, Ordering}; - -static USED_ARGSFILE_FEATURE: AtomicBool = AtomicBool::new(false); - -pub fn used_unstable_argsfile() -> bool { - USED_ARGSFILE_FEATURE.load(Ordering::Relaxed) -} pub fn arg_expand(arg: String) -> Result<Vec<String>, Error> { if arg.starts_with("@") { let path = &arg[1..]; let file = match fs::read_to_string(path) { - Ok(file) => { - USED_ARGSFILE_FEATURE.store(true, Ordering::Relaxed); - file - } + Ok(file) => file, Err(ref err) if err.kind() == io::ErrorKind::InvalidData => { return Err(Error::Utf8Error(Some(path.to_string()))); } diff --git a/src/librustc_driver/lib.rs b/src/librustc_driver/lib.rs index 611b891d99a..47acf387f35 100644 --- a/src/librustc_driver/lib.rs +++ b/src/librustc_driver/lib.rs @@ -1044,12 +1044,6 @@ pub fn handle_options(args: &[String]) -> Option<getopts::Matches> { // (unstable option being used on stable) nightly_options::check_nightly_options(&matches, &config::rustc_optgroups()); - // Late check to see if @file was used without unstable options enabled - if crate::args::used_unstable_argsfile() && !nightly_options::is_unstable_enabled(&matches) { - early_error(ErrorOutputType::default(), - "@path is unstable - use -Z unstable-options to enable its use"); - } - if matches.opt_present("h") || matches.opt_present("help") { // Only show unstable options in --help if we accept unstable options. usage(matches.opt_present("verbose"), nightly_options::is_unstable_enabled(&matches)); diff --git a/src/librustc_metadata/rmeta/decoder/cstore_impl.rs b/src/librustc_metadata/rmeta/decoder/cstore_impl.rs index 6eacfc28de2..1118162bdeb 100644 --- a/src/librustc_metadata/rmeta/decoder/cstore_impl.rs +++ b/src/librustc_metadata/rmeta/decoder/cstore_impl.rs @@ -32,7 +32,6 @@ use syntax::parse::parser::emit_unclosed_delims; use syntax::source_map::Spanned; use syntax::symbol::Symbol; use syntax_pos::{Span, FileName}; -use rustc_index::bit_set::BitSet; macro_rules! provide { (<$lt:tt> $tcx:ident, $def_id:ident, $other:ident, $cdata:ident, @@ -122,9 +121,7 @@ provide! { <'tcx> tcx, def_id, other, cdata, } optimized_mir => { tcx.arena.alloc(cdata.get_optimized_mir(tcx, def_id.index)) } promoted_mir => { tcx.arena.alloc(cdata.get_promoted_mir(tcx, def_id.index)) } - mir_const_qualif => { - (cdata.mir_const_qualif(def_id.index), tcx.arena.alloc(BitSet::new_empty(0))) - } + mir_const_qualif => { cdata.mir_const_qualif(def_id.index) } fn_sig => { cdata.fn_sig(def_id.index, tcx) } inherent_impls => { cdata.get_inherent_implementations_for_type(tcx, def_id.index) } is_const_fn_raw => { cdata.is_const_fn_raw(def_id.index) } diff --git a/src/librustc_metadata/rmeta/encoder.rs b/src/librustc_metadata/rmeta/encoder.rs index c6677ea3534..ad1ab16a410 100644 --- a/src/librustc_metadata/rmeta/encoder.rs +++ b/src/librustc_metadata/rmeta/encoder.rs @@ -955,7 +955,7 @@ impl EncodeContext<'tcx> { record!(self.per_def.kind[def_id] <- match impl_item.kind { ty::AssocKind::Const => { if let hir::ImplItemKind::Const(_, body_id) = ast_item.kind { - let mir = self.tcx.at(ast_item.span).mir_const_qualif(def_id).0; + let mir = self.tcx.at(ast_item.span).mir_const_qualif(def_id); EntryKind::AssocConst(container, ConstQualif { mir }, @@ -1089,7 +1089,7 @@ impl EncodeContext<'tcx> { hir::ItemKind::Static(_, hir::MutMutable, _) => EntryKind::MutStatic, hir::ItemKind::Static(_, hir::MutImmutable, _) => EntryKind::ImmStatic, hir::ItemKind::Const(_, body_id) => { - let mir = self.tcx.at(item.span).mir_const_qualif(def_id).0; + let mir = self.tcx.at(item.span).mir_const_qualif(def_id); EntryKind::Const( ConstQualif { mir }, self.encode_rendered_const_for_body(body_id) @@ -1368,7 +1368,7 @@ impl EncodeContext<'tcx> { let id = self.tcx.hir().as_local_hir_id(def_id).unwrap(); let body_id = self.tcx.hir().body_owned_by(id); let const_data = self.encode_rendered_const_for_body(body_id); - let mir = self.tcx.mir_const_qualif(def_id).0; + let mir = self.tcx.mir_const_qualif(def_id); record!(self.per_def.kind[def_id] <- EntryKind::Const(ConstQualif { mir }, const_data)); record!(self.per_def.visibility[def_id] <- ty::Visibility::Public); diff --git a/src/librustc_mir/transform/check_consts/qualifs.rs b/src/librustc_mir/transform/check_consts/qualifs.rs index 840ad303016..496a5679067 100644 --- a/src/librustc_mir/transform/check_consts/qualifs.rs +++ b/src/librustc_mir/transform/check_consts/qualifs.rs @@ -123,7 +123,7 @@ pub trait Qualif { if cx.tcx.trait_of_item(def_id).is_some() { Self::in_any_value_of_ty(cx, constant.literal.ty) } else { - let (bits, _) = cx.tcx.at(constant.span).mir_const_qualif(def_id); + let bits = cx.tcx.at(constant.span).mir_const_qualif(def_id); let qualif = QualifSet(bits).contains::<Self>(); diff --git a/src/librustc_mir/transform/mod.rs b/src/librustc_mir/transform/mod.rs index dbe6c784592..6d6d6bea2a0 100644 --- a/src/librustc_mir/transform/mod.rs +++ b/src/librustc_mir/transform/mod.rs @@ -210,13 +210,14 @@ fn mir_validated( } let mut body = tcx.mir_const(def_id).steal(); - let qualify_and_promote_pass = qualify_consts::QualifyAndPromoteConstants::default(); + let promote_pass = promote_consts::PromoteTemps::default(); run_passes(tcx, &mut body, InstanceDef::Item(def_id), None, MirPhase::Validated, &[ // What we need to run borrowck etc. - &qualify_and_promote_pass, + &qualify_consts::QualifyAndPromoteConstants::default(), + &promote_pass, &simplify::SimplifyCfg::new("qualify-consts"), ]); - let promoted = qualify_and_promote_pass.promoted.into_inner(); + let promoted = promote_pass.promoted_fragments.into_inner(); (tcx.alloc_steal_mir(body), tcx.alloc_steal_promoted(promoted)) } diff --git a/src/librustc_mir/transform/promote_consts.rs b/src/librustc_mir/transform/promote_consts.rs index f5e49e32834..48a58f1d0ee 100644 --- a/src/librustc_mir/transform/promote_consts.rs +++ b/src/librustc_mir/transform/promote_consts.rs @@ -17,7 +17,7 @@ use rustc::mir::*; use rustc::mir::interpret::ConstValue; use rustc::mir::visit::{PlaceContext, MutatingUseContext, MutVisitor, Visitor}; use rustc::mir::traversal::ReversePostorder; -use rustc::ty::{self, List, TyCtxt}; +use rustc::ty::{self, List, TyCtxt, TypeFoldable}; use rustc::ty::subst::InternalSubsts; use rustc::ty::cast::CastTy; use syntax::ast::LitKind; @@ -25,12 +25,68 @@ use syntax::symbol::sym; use syntax_pos::{Span, DUMMY_SP}; use rustc_index::vec::{IndexVec, Idx}; +use rustc_index::bit_set::HybridBitSet; use rustc_target::spec::abi::Abi; +use std::cell::Cell; use std::{iter, mem, usize}; +use crate::transform::{MirPass, MirSource}; use crate::transform::check_consts::{qualifs, Item, ConstKind, is_lang_panic_fn}; +/// A `MirPass` for promotion. +/// +/// In this case, "promotion" entails the following: +/// - Extract promotable temps in `fn` and `const fn` into their own MIR bodies. +/// - Extend lifetimes in `const` and `static` by removing `Drop` and `StorageDead`. +/// - Emit errors if the requirements of `#[rustc_args_required_const]` are not met. +/// +/// After this pass is run, `promoted_fragments` will hold the MIR body corresponding to each +/// newly created `StaticKind::Promoted`. +#[derive(Default)] +pub struct PromoteTemps<'tcx> { + pub promoted_fragments: Cell<IndexVec<Promoted, Body<'tcx>>>, +} + +impl<'tcx> MirPass<'tcx> for PromoteTemps<'tcx> { + fn run_pass(&self, tcx: TyCtxt<'tcx>, src: MirSource<'tcx>, body: &mut Body<'tcx>) { + // There's not really any point in promoting errorful MIR. + // + // This does not include MIR that failed const-checking, which we still try to promote. + if body.return_ty().references_error() { + tcx.sess.delay_span_bug(body.span, "PromoteTemps: MIR had errors"); + return; + } + + if src.promoted.is_some() { + return; + } + + let def_id = src.def_id(); + + let item = Item::new(tcx, def_id, body); + let mut rpo = traversal::reverse_postorder(body); + let (temps, all_candidates) = collect_temps_and_candidates(tcx, body, &mut rpo); + + let promotable_candidates = validate_candidates(tcx, body, def_id, &temps, &all_candidates); + + // For now, lifetime extension is done in `const` and `static`s without creating promoted + // MIR fragments by removing `Drop` and `StorageDead` for each referent. However, this will + // not work inside loops when they are allowed in `const`s. + // + // FIXME: use promoted MIR fragments everywhere? + let promoted_fragments = if should_create_promoted_mir_fragments(item.const_kind) { + promote_candidates(def_id, body, tcx, temps, promotable_candidates) + } else { + // FIXME: promote const array initializers in consts. + remove_drop_and_storage_dead_on_promoted_locals(tcx, body, &promotable_candidates); + IndexVec::new() + }; + + self.promoted_fragments.set(promoted_fragments); + } +} + /// State of a temporary during collection and promotion. #[derive(Copy, Clone, PartialEq, Eq, Debug)] pub enum TempState { @@ -538,7 +594,7 @@ impl<'tcx> Validator<'_, 'tcx> { // is gone - we can always promote constants even if they // fail to pass const-checking, as compilation would've // errored independently and promotion can't change that. - let (bits, _) = self.tcx.at(constant.span).mir_const_qualif(def_id); + let bits = self.tcx.at(constant.span).mir_const_qualif(def_id); if bits == super::qualify_consts::QUALIF_ERROR_BIT { self.tcx.sess.delay_span_bug( constant.span, @@ -1154,3 +1210,83 @@ crate fn should_suggest_const_in_array_repeat_expressions_attribute<'tcx>( should_promote={:?} feature_flag={:?}", mir_def_id, should_promote, feature_flag); should_promote && !feature_flag } + +fn should_create_promoted_mir_fragments(const_kind: Option<ConstKind>) -> bool { + match const_kind { + Some(ConstKind::ConstFn) | None => true, + Some(ConstKind::Const) | Some(ConstKind::Static) | Some(ConstKind::StaticMut) => false, + } +} + +/// In `const` and `static` everything without `StorageDead` +/// is `'static`, we don't have to create promoted MIR fragments, +/// just remove `Drop` and `StorageDead` on "promoted" locals. +fn remove_drop_and_storage_dead_on_promoted_locals( + tcx: TyCtxt<'tcx>, + body: &mut Body<'tcx>, + promotable_candidates: &[Candidate], +) { + debug!("run_pass: promotable_candidates={:?}", promotable_candidates); + + // Removing `StorageDead` will cause errors for temps declared inside a loop body. For now we + // simply skip promotion if a loop exists, since loops are not yet allowed in a `const`. + // + // FIXME: Just create MIR fragments for `const`s instead of using this hackish approach? + if body.is_cfg_cyclic() { + tcx.sess.delay_span_bug(body.span, "Control-flow cycle detected in `const`"); + return; + } + + // The underlying local for promotion contexts like `&temp` and `&(temp.proj)`. + let mut requires_lifetime_extension = HybridBitSet::new_empty(body.local_decls.len()); + + promotable_candidates + .iter() + .filter_map(|c| { + match c { + Candidate::Ref(loc) => Some(loc), + Candidate::Repeat(_) | Candidate::Argument { .. } => None, + } + }) + .map(|&Location { block, statement_index }| { + // FIXME: store the `Local` for each `Candidate` when it is created. + let place = match &body[block].statements[statement_index].kind { + StatementKind::Assign(box ( _, Rvalue::Ref(_, _, place))) => place, + _ => bug!("`Candidate::Ref` without corresponding assignment"), + }; + + match place.base { + PlaceBase::Local(local) => local, + PlaceBase::Static(_) => bug!("`Candidate::Ref` for a non-local"), + } + }) + .for_each(|local| { + requires_lifetime_extension.insert(local); + }); + + // Remove `Drop` terminators and `StorageDead` statements for all promotable temps that require + // lifetime extension. + for block in body.basic_blocks_mut() { + block.statements.retain(|statement| { + match statement.kind { + StatementKind::StorageDead(index) => !requires_lifetime_extension.contains(index), + _ => true + } + }); + let terminator = block.terminator_mut(); + match &terminator.kind { + TerminatorKind::Drop { + location, + target, + .. + } => { + if let Some(index) = location.as_local() { + if requires_lifetime_extension.contains(index) { + terminator.kind = TerminatorKind::Goto { target: *target }; + } + } + } + _ => {} + } + } +} diff --git a/src/librustc_mir/transform/qualify_consts.rs b/src/librustc_mir/transform/qualify_consts.rs index 6a7058f1930..5ad5363768d 100644 --- a/src/librustc_mir/transform/qualify_consts.rs +++ b/src/librustc_mir/transform/qualify_consts.rs @@ -15,7 +15,6 @@ use rustc::ty::cast::CastTy; use rustc::ty::query::Providers; use rustc::mir::*; use rustc::mir::interpret::ConstValue; -use rustc::mir::traversal::ReversePostorder; use rustc::mir::visit::{PlaceContext, Visitor, MutatingUseContext, NonMutatingUseContext}; use rustc::middle::lang_items; use rustc::session::config::nightly_options; @@ -31,7 +30,6 @@ use std::usize; use rustc::hir::HirId; use crate::transform::{MirPass, MirSource}; -use super::promote_consts::{self, Candidate, TempState}; use crate::transform::check_consts::ops::{self, NonConstOp}; /// What kind of item we are in. @@ -258,7 +256,7 @@ trait Qualif { if cx.tcx.trait_of_item(def_id).is_some() { Self::in_any_value_of_ty(cx, constant.literal.ty).unwrap_or(false) } else { - let (bits, _) = cx.tcx.at(constant.span).mir_const_qualif(def_id); + let bits = cx.tcx.at(constant.span).mir_const_qualif(def_id); let qualif = PerQualif::decode_from_bits(bits).0[Self::IDX]; @@ -477,10 +475,6 @@ struct Checker<'a, 'tcx> { span: Span, def_id: DefId, - rpo: ReversePostorder<'a, 'tcx>, - - temp_promotion_state: IndexVec<Local, TempState>, - unchecked_promotion_candidates: Vec<Candidate>, /// If `true`, do not emit errors to the user, merely collect them in `errors`. suppress_errors: bool, @@ -509,10 +503,6 @@ impl Deref for Checker<'a, 'tcx> { impl<'a, 'tcx> Checker<'a, 'tcx> { fn new(tcx: TyCtxt<'tcx>, def_id: DefId, body: &'a Body<'tcx>, mode: Mode) -> Self { assert!(def_id.is_local()); - let mut rpo = traversal::reverse_postorder(body); - let (temps, unchecked_promotion_candidates) = - promote_consts::collect_temps_and_candidates(tcx, body, &mut rpo); - rpo.reset(); let param_env = tcx.param_env(def_id); @@ -539,9 +529,6 @@ impl<'a, 'tcx> Checker<'a, 'tcx> { cx, span: body.span, def_id, - rpo, - temp_promotion_state: temps, - unchecked_promotion_candidates, errors: vec![], suppress_errors: false, } @@ -662,14 +649,6 @@ impl<'a, 'tcx> Checker<'a, 'tcx> { let kind = self.body.local_kind(index); debug!("store to {:?} {:?}", kind, index); - // Only handle promotable temps in non-const functions. - if self.mode == Mode::NonConstFn { - if kind != LocalKind::Temp || - !self.temp_promotion_state[index].is_promotable() { - return; - } - } - // this is overly restrictive, because even full assignments do not clear the qualif // While we could special case full assignments, this would be inconsistent with // aggregates where we overwrite all fields via assignments, which would not get @@ -682,7 +661,7 @@ impl<'a, 'tcx> Checker<'a, 'tcx> { } /// Check a whole const, static initializer or const fn. - fn check_const(&mut self) -> (u8, &'tcx BitSet<Local>) { + fn check_const(&mut self) -> u8 { use crate::transform::check_consts as new_checker; debug!("const-checking {} {:?}", self.mode, self.def_id); @@ -704,7 +683,6 @@ impl<'a, 'tcx> Checker<'a, 'tcx> { let mut seen_blocks = BitSet::new_empty(body.basic_blocks().len()); let mut bb = START_BLOCK; - let mut has_controlflow_error = false; loop { seen_blocks.insert(bb.index()); @@ -745,7 +723,6 @@ impl<'a, 'tcx> Checker<'a, 'tcx> { bb = target; } _ => { - has_controlflow_error = true; self.not_const(ops::Loop); validator.check_op(ops::Loop); break; @@ -772,51 +749,7 @@ impl<'a, 'tcx> Checker<'a, 'tcx> { } } - // Collect all the temps we need to promote. - let mut promoted_temps = BitSet::new_empty(self.temp_promotion_state.len()); - - // HACK: if parts of the control-flow graph were skipped due to an error, don't try to - // promote anything, since that can cause errors in a `const` if e.g. rvalue static - // promotion is attempted within a loop body. - let unleash_miri = self.tcx.sess.opts.debugging_opts.unleash_the_miri_inside_of_you; - let promotion_candidates = if has_controlflow_error && !unleash_miri { - self.tcx.sess.delay_span_bug( - body.span, - "check_const: expected control-flow error(s)", - ); - - vec![] - } else { - promote_consts::validate_candidates( - self.tcx, - self.body, - self.def_id, - &self.temp_promotion_state, - &self.unchecked_promotion_candidates, - ) - }; - - debug!("qualify_const: promotion_candidates={:?}", promotion_candidates); - for candidate in promotion_candidates { - match candidate { - Candidate::Ref(Location { block: bb, statement_index: stmt_idx }) => { - if let StatementKind::Assign(box( _, Rvalue::Ref(_, _, place))) - = &self.body[bb].statements[stmt_idx].kind - { - if let PlaceBase::Local(local) = place.base { - promoted_temps.insert(local); - } - } - } - - // Only rvalue-static promotion requires extending the lifetime of the promoted - // local. - Candidate::Argument { .. } | Candidate::Repeat(_) => {} - } - } - - let qualifs = self.qualifs_in_local(RETURN_PLACE); - (qualifs.encode_to_bits(), self.tcx.arena.alloc(promoted_temps)) + self.qualifs_in_local(RETURN_PLACE).encode_to_bits() } } @@ -1346,7 +1279,7 @@ pub fn provide(providers: &mut Providers<'_>) { // in `promote_consts`, see the comment in `validate_operand`. pub(super) const QUALIF_ERROR_BIT: u8 = 1 << 2; -fn mir_const_qualif(tcx: TyCtxt<'_>, def_id: DefId) -> (u8, &BitSet<Local>) { +fn mir_const_qualif(tcx: TyCtxt<'_>, def_id: DefId) -> u8 { // N.B., this `borrow()` is guaranteed to be valid (i.e., the value // cannot yet be stolen), because `mir_validated()`, which steals // from `mir_const(), forces this query to execute before @@ -1355,7 +1288,7 @@ fn mir_const_qualif(tcx: TyCtxt<'_>, def_id: DefId) -> (u8, &BitSet<Local>) { if body.return_ty().references_error() { tcx.sess.delay_span_bug(body.span, "mir_const_qualif: MIR had errors"); - return (QUALIF_ERROR_BIT, tcx.arena.alloc(BitSet::new_empty(0))); + return QUALIF_ERROR_BIT; } Checker::new(tcx, def_id, body, Mode::Const).check_const() @@ -1391,56 +1324,34 @@ impl<'tcx> MirPass<'tcx> for QualifyAndPromoteConstants<'tcx> { let mode = determine_mode(tcx, hir_id, def_id); debug!("run_pass: mode={:?}", mode); - if let Mode::NonConstFn | Mode::ConstFn = mode { + if let Mode::NonConstFn = mode { + // No need to const-check a non-const `fn` now that we don't do promotion here. + return; + } else if let Mode::ConstFn = mode { let mut checker = Checker::new(tcx, def_id, body, mode); - if let Mode::ConstFn = mode { - let use_min_const_fn_checks = - !tcx.sess.opts.debugging_opts.unleash_the_miri_inside_of_you && - tcx.is_min_const_fn(def_id); - if use_min_const_fn_checks { - // Enforce `min_const_fn` for stable `const fn`s. - use super::qualify_min_const_fn::is_min_const_fn; - if let Err((span, err)) = is_min_const_fn(tcx, def_id, body) { - error_min_const_fn_violation(tcx, span, err); - return; - } - - // `check_const` should not produce any errors, but better safe than sorry - // FIXME(#53819) - // NOTE(eddyb) `check_const` is actually needed for promotion inside - // `min_const_fn` functions. - } - - // Enforce a constant-like CFG for `const fn`. - checker.check_const(); - } else { - while let Some((bb, data)) = checker.rpo.next() { - checker.visit_basic_block_data(bb, data); + let use_min_const_fn_checks = + !tcx.sess.opts.debugging_opts.unleash_the_miri_inside_of_you && + tcx.is_min_const_fn(def_id); + if use_min_const_fn_checks { + // Enforce `min_const_fn` for stable `const fn`s. + use super::qualify_min_const_fn::is_min_const_fn; + if let Err((span, err)) = is_min_const_fn(tcx, def_id, body) { + error_min_const_fn_violation(tcx, span, err); + return; } } - // Promote only the promotable candidates. - let temps = checker.temp_promotion_state; - let candidates = promote_consts::validate_candidates( - tcx, - body, - def_id, - &temps, - &checker.unchecked_promotion_candidates, - ); - - // Do the actual promotion, now that we know what's viable. - self.promoted.set( - promote_consts::promote_candidates(def_id, body, tcx, temps, candidates) - ); + // `check_const` should not produce any errors, but better safe than sorry + // FIXME(#53819) + // Enforce a constant-like CFG for `const fn`. + checker.check_const(); } else { check_short_circuiting_in_const_local(tcx, body, mode); - let promoted_temps = match mode { - Mode::Const => tcx.mir_const_qualif(def_id).1, - _ => Checker::new(tcx, def_id, body, mode).check_const().1, + match mode { + Mode::Const => tcx.mir_const_qualif(def_id), + _ => Checker::new(tcx, def_id, body, mode).check_const(), }; - remove_drop_and_storage_dead_on_promoted_locals(body, promoted_temps); } if mode == Mode::Static && !tcx.has_attr(def_id, sym::thread_local) { @@ -1501,40 +1412,6 @@ fn check_short_circuiting_in_const_local(tcx: TyCtxt<'_>, body: &mut Body<'tcx>, } } -/// In `const` and `static` everything without `StorageDead` -/// is `'static`, we don't have to create promoted MIR fragments, -/// just remove `Drop` and `StorageDead` on "promoted" locals. -fn remove_drop_and_storage_dead_on_promoted_locals( - body: &mut Body<'tcx>, - promoted_temps: &BitSet<Local>, -) { - debug!("run_pass: promoted_temps={:?}", promoted_temps); - - for block in body.basic_blocks_mut() { - block.statements.retain(|statement| { - match statement.kind { - StatementKind::StorageDead(index) => !promoted_temps.contains(index), - _ => true - } - }); - let terminator = block.terminator_mut(); - match &terminator.kind { - TerminatorKind::Drop { - location, - target, - .. - } => { - if let Some(index) = location.as_local() { - if promoted_temps.contains(index) { - terminator.kind = TerminatorKind::Goto { target: *target }; - } - } - } - _ => {} - } - } -} - fn check_static_is_sync(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>, hir_id: HirId) { let ty = body.return_ty(); tcx.infer_ctxt().enter(|infcx| { diff --git a/src/librustc_target/abi/call/mod.rs b/src/librustc_target/abi/call/mod.rs index 6029b00aa31..aced12aa32a 100644 --- a/src/librustc_target/abi/call/mod.rs +++ b/src/librustc_target/abi/call/mod.rs @@ -554,7 +554,7 @@ impl<'a, Ty> FnAbi<'a, Ty> { "arm" => arm::compute_abi_info(cx, self), "mips" => mips::compute_abi_info(cx, self), "mips64" => mips64::compute_abi_info(cx, self), - "powerpc" => powerpc::compute_abi_info(cx, self), + "powerpc" => powerpc::compute_abi_info(self), "powerpc64" => powerpc64::compute_abi_info(cx, self), "s390x" => s390x::compute_abi_info(cx, self), "msp430" => msp430::compute_abi_info(self), diff --git a/src/librustc_target/abi/call/powerpc.rs b/src/librustc_target/abi/call/powerpc.rs index b2c8d26ff1f..740bd7222f2 100644 --- a/src/librustc_target/abi/call/powerpc.rs +++ b/src/librustc_target/abi/call/powerpc.rs @@ -1,49 +1,28 @@ -use crate::abi::call::{ArgAbi, FnAbi, Reg, Uniform}; -use crate::abi::{HasDataLayout, LayoutOf, Size, TyLayoutMethods}; +use crate::abi::call::{ArgAbi, FnAbi}; -fn classify_ret<'a, Ty, C>(cx: &C, ret: &mut ArgAbi<'_, Ty>, offset: &mut Size) - where Ty: TyLayoutMethods<'a, C>, C: LayoutOf<Ty = Ty> + HasDataLayout -{ - if !ret.layout.is_aggregate() { - ret.extend_integer_width_to(32); - } else { +fn classify_ret<Ty>(ret: &mut ArgAbi<'_, Ty>) { + if ret.layout.is_aggregate() { ret.make_indirect(); - *offset += cx.data_layout().pointer_size; + } else { + ret.extend_integer_width_to(32); } } -fn classify_arg<'a, Ty, C>(cx: &C, arg: &mut ArgAbi<'_, Ty>, offset: &mut Size) - where Ty: TyLayoutMethods<'a, C>, C: LayoutOf<Ty = Ty> + HasDataLayout -{ - let dl = cx.data_layout(); - let size = arg.layout.size; - let align = arg.layout.align.max(dl.i32_align).min(dl.i64_align).abi; - +fn classify_arg<Ty>(arg: &mut ArgAbi<'_, Ty>) { if arg.layout.is_aggregate() { - arg.cast_to(Uniform { - unit: Reg::i32(), - total: size - }); - if !offset.is_aligned(align) { - arg.pad_with(Reg::i32()); - } + arg.make_indirect(); } else { arg.extend_integer_width_to(32); } - - *offset = offset.align_to(align) + size.align_to(align); } -pub fn compute_abi_info<'a, Ty, C>(cx: &C, fn_abi: &mut FnAbi<'_, Ty>) - where Ty: TyLayoutMethods<'a, C>, C: LayoutOf<Ty = Ty> + HasDataLayout -{ - let mut offset = Size::ZERO; +pub fn compute_abi_info<Ty>(fn_abi: &mut FnAbi<'_, Ty>) { if !fn_abi.ret.is_ignore() { - classify_ret(cx, &mut fn_abi.ret, &mut offset); + classify_ret(&mut fn_abi.ret); } for arg in &mut fn_abi.args { if arg.is_ignore() { continue; } - classify_arg(cx, arg, &mut offset); + classify_arg(arg); } } diff --git a/src/libsyntax_ext/format.rs b/src/libsyntax_ext/format.rs index e25ba7b1783..25daca9237f 100644 --- a/src/libsyntax_ext/format.rs +++ b/src/libsyntax_ext/format.rs @@ -21,7 +21,7 @@ use std::collections::hash_map::Entry; #[derive(PartialEq)] enum ArgumentType { - Placeholder(String), + Placeholder(&'static str), Count, } @@ -244,7 +244,57 @@ impl<'a, 'b> Context<'a, 'b> { parse::ArgumentNamed(s) => Named(s), }; - let ty = Placeholder(arg.format.ty.to_string()); + let ty = Placeholder(match &arg.format.ty[..] { + "" => "Display", + "?" => "Debug", + "e" => "LowerExp", + "E" => "UpperExp", + "o" => "Octal", + "p" => "Pointer", + "b" => "Binary", + "x" => "LowerHex", + "X" => "UpperHex", + _ => { + let fmtsp = self.fmtsp; + let sp = arg.format.ty_span.map(|sp| fmtsp.from_inner(sp)); + let mut err = self.ecx.struct_span_err( + sp.unwrap_or(fmtsp), + &format!("unknown format trait `{}`", arg.format.ty), + ); + err.note("the only appropriate formatting traits are:\n\ + - ``, which uses the `Display` trait\n\ + - `?`, which uses the `Debug` trait\n\ + - `e`, which uses the `LowerExp` trait\n\ + - `E`, which uses the `UpperExp` trait\n\ + - `o`, which uses the `Octal` trait\n\ + - `p`, which uses the `Pointer` trait\n\ + - `b`, which uses the `Binary` trait\n\ + - `x`, which uses the `LowerHex` trait\n\ + - `X`, which uses the `UpperHex` trait"); + if let Some(sp) = sp { + for (fmt, name) in &[ + ("", "Display"), + ("?", "Debug"), + ("e", "LowerExp"), + ("E", "UpperExp"), + ("o", "Octal"), + ("p", "Pointer"), + ("b", "Binary"), + ("x", "LowerHex"), + ("X", "UpperHex"), + ] { + err.tool_only_span_suggestion( + sp, + &format!("use the `{}` trait", name), + fmt.to_string(), + Applicability::MaybeIncorrect, + ); + } + } + err.emit(); + "<invalid>" + } + }); self.verify_arg_type(pos, ty); self.curpiece += 1; } @@ -590,6 +640,7 @@ impl<'a, 'b> Context<'a, 'b> { width: parse::CountImplied, width_span: None, ty: arg.format.ty, + ty_span: arg.format.ty_span, }, }; @@ -761,37 +812,8 @@ impl<'a, 'b> Context<'a, 'b> { sp = ecx.with_def_site_ctxt(sp); let arg = ecx.expr_ident(sp, arg); let trait_ = match *ty { - Placeholder(ref tyname) => { - match &tyname[..] { - "" => "Display", - "?" => "Debug", - "e" => "LowerExp", - "E" => "UpperExp", - "o" => "Octal", - "p" => "Pointer", - "b" => "Binary", - "x" => "LowerHex", - "X" => "UpperHex", - _ => { - let mut err = ecx.struct_span_err( - sp, - &format!("unknown format trait `{}`", *tyname), - ); - err.note("the only appropriate formatting traits are:\n\ - - ``, which uses the `Display` trait\n\ - - `?`, which uses the `Debug` trait\n\ - - `e`, which uses the `LowerExp` trait\n\ - - `E`, which uses the `UpperExp` trait\n\ - - `o`, which uses the `Octal` trait\n\ - - `p`, which uses the `Pointer` trait\n\ - - `b`, which uses the `Binary` trait\n\ - - `x`, which uses the `LowerHex` trait\n\ - - `X`, which uses the `UpperHex` trait"); - err.emit(); - return DummyResult::raw_expr(sp, true); - } - } - } + Placeholder(trait_) if trait_ == "<invalid>" => return DummyResult::raw_expr(sp, true), + Placeholder(trait_) => trait_, Count => { let path = ecx.std_path(&[sym::fmt, sym::ArgumentV1, sym::from_usize]); return ecx.expr_call_global(macsp, path, vec![arg]); diff --git a/src/test/mir-opt/match_false_edges.rs b/src/test/mir-opt/match_false_edges.rs index b275c06e05c..648856b5523 100644 --- a/src/test/mir-opt/match_false_edges.rs +++ b/src/test/mir-opt/match_false_edges.rs @@ -39,7 +39,7 @@ fn main() { // END RUST SOURCE // -// START rustc.full_tested_match.QualifyAndPromoteConstants.after.mir +// START rustc.full_tested_match.PromoteTemps.after.mir // bb0: { // ... // _2 = std::option::Option::<i32>::Some(const 42i32,); @@ -108,9 +108,9 @@ fn main() { // _0 = (); // return; // } -// END rustc.full_tested_match.QualifyAndPromoteConstants.after.mir +// END rustc.full_tested_match.PromoteTemps.after.mir // -// START rustc.full_tested_match2.QualifyAndPromoteConstants.before.mir +// START rustc.full_tested_match2.PromoteTemps.before.mir // bb0: { // ... // _2 = std::option::Option::<i32>::Some(const 42i32,); @@ -179,9 +179,9 @@ fn main() { // _0 = (); // return; // } -// END rustc.full_tested_match2.QualifyAndPromoteConstants.before.mir +// END rustc.full_tested_match2.PromoteTemps.before.mir // -// START rustc.main.QualifyAndPromoteConstants.before.mir +// START rustc.main.PromoteTemps.before.mir // bb0: { // ... // _2 = std::option::Option::<i32>::Some(const 1i32,); @@ -276,4 +276,4 @@ fn main() { // _0 = (); // return; // } -// END rustc.main.QualifyAndPromoteConstants.before.mir +// END rustc.main.PromoteTemps.before.mir diff --git a/src/test/ui/associated-types/point-at-type-on-obligation-failure-2.rs b/src/test/ui/associated-types/point-at-type-on-obligation-failure-2.rs index 9360d96f05e..67b7c78071c 100644 --- a/src/test/ui/associated-types/point-at-type-on-obligation-failure-2.rs +++ b/src/test/ui/associated-types/point-at-type-on-obligation-failure-2.rs @@ -8,4 +8,20 @@ impl Foo for () { type Assoc = bool; //~ ERROR the trait bound `bool: Bar` is not satisfied } +trait Baz where Self::Assoc: Bar { + type Assoc; +} + +impl Baz for () { + type Assoc = bool; //~ ERROR the trait bound `bool: Bar` is not satisfied +} + +trait Bat where <Self as Bat>::Assoc: Bar { + type Assoc; +} + +impl Bat for () { + type Assoc = bool; //~ ERROR the trait bound `bool: Bar` is not satisfied +} + fn main() {} diff --git a/src/test/ui/associated-types/point-at-type-on-obligation-failure-2.stderr b/src/test/ui/associated-types/point-at-type-on-obligation-failure-2.stderr index f1a2e343a7e..072e9dad062 100644 --- a/src/test/ui/associated-types/point-at-type-on-obligation-failure-2.stderr +++ b/src/test/ui/associated-types/point-at-type-on-obligation-failure-2.stderr @@ -9,6 +9,32 @@ LL | impl Foo for () { LL | type Assoc = bool; | ^^^^^^^^^^^^^^^^^^ the trait `Bar` is not implemented for `bool` -error: aborting due to previous error +error[E0277]: the trait bound `bool: Bar` is not satisfied + --> $DIR/point-at-type-on-obligation-failure-2.rs:16:5 + | +LL | trait Baz where Self::Assoc: Bar { + | ---------------- restricted in this bound +LL | type Assoc; + | ----- associated type defined here +... +LL | impl Baz for () { + | --------------- in this `impl` item +LL | type Assoc = bool; + | ^^^^^^^^^^^^^^^^^^ the trait `Bar` is not implemented for `bool` + +error[E0277]: the trait bound `bool: Bar` is not satisfied + --> $DIR/point-at-type-on-obligation-failure-2.rs:24:5 + | +LL | trait Bat where <Self as Bat>::Assoc: Bar { + | ------------------------- restricted in this bound +LL | type Assoc; + | ----- associated type defined here +... +LL | impl Bat for () { + | --------------- in this `impl` item +LL | type Assoc = bool; + | ^^^^^^^^^^^^^^^^^^ the trait `Bar` is not implemented for `bool` + +error: aborting due to 3 previous errors For more information about this error, try `rustc --explain E0277`. diff --git a/src/test/ui/consts/min_const_fn/min_const_fn.rs b/src/test/ui/consts/min_const_fn/min_const_fn.rs index d0f63b148ff..db68a05905a 100644 --- a/src/test/ui/consts/min_const_fn/min_const_fn.rs +++ b/src/test/ui/consts/min_const_fn/min_const_fn.rs @@ -136,7 +136,6 @@ const fn no_rpit() -> impl std::fmt::Debug {} //~ ERROR `impl Trait` in const fn const fn no_dyn_trait(_x: &dyn std::fmt::Debug) {} //~ ERROR trait bounds other than `Sized` const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() } //~^ ERROR trait bounds other than `Sized` -//~| ERROR cannot return reference to temporary value const fn no_unsafe() { unsafe {} } diff --git a/src/test/ui/consts/min_const_fn/min_const_fn.stderr b/src/test/ui/consts/min_const_fn/min_const_fn.stderr index 3158b6284db..64b2ce83da2 100644 --- a/src/test/ui/consts/min_const_fn/min_const_fn.stderr +++ b/src/test/ui/consts/min_const_fn/min_const_fn.stderr @@ -286,17 +286,8 @@ LL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() } = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563 = help: add `#![feature(const_fn)]` to the crate attributes to enable -error[E0515]: cannot return reference to temporary value - --> $DIR/min_const_fn.rs:137:63 - | -LL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() } - | ^-- - | || - | |temporary value created here - | returns a reference to data owned by the current function - error[E0723]: trait bounds other than `Sized` on const fn parameters are unstable - --> $DIR/min_const_fn.rs:143:41 + --> $DIR/min_const_fn.rs:142:41 | LL | const fn really_no_traits_i_mean_it() { (&() as &dyn std::fmt::Debug, ()).1 } | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -305,7 +296,7 @@ LL | const fn really_no_traits_i_mean_it() { (&() as &dyn std::fmt::Debug, ()).1 = help: add `#![feature(const_fn)]` to the crate attributes to enable error[E0723]: function pointers in const fn are unstable - --> $DIR/min_const_fn.rs:146:21 + --> $DIR/min_const_fn.rs:145:21 | LL | const fn no_fn_ptrs(_x: fn()) {} | ^^ @@ -314,7 +305,7 @@ LL | const fn no_fn_ptrs(_x: fn()) {} = help: add `#![feature(const_fn)]` to the crate attributes to enable error[E0723]: function pointers in const fn are unstable - --> $DIR/min_const_fn.rs:148:27 + --> $DIR/min_const_fn.rs:147:27 | LL | const fn no_fn_ptrs2() -> fn() { fn foo() {} foo } | ^^^^ @@ -322,7 +313,7 @@ LL | const fn no_fn_ptrs2() -> fn() { fn foo() {} foo } = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563 = help: add `#![feature(const_fn)]` to the crate attributes to enable -error: aborting due to 37 previous errors +error: aborting due to 36 previous errors -Some errors have detailed explanations: E0493, E0515, E0723. +Some errors have detailed explanations: E0493, E0723. For more information about an error, try `rustc --explain E0493`. diff --git a/src/test/ui/consts/min_const_fn/min_const_fn_dyn.rs b/src/test/ui/consts/min_const_fn/min_const_fn_dyn.rs index 3833510c0b3..6ca1e59b3af 100644 --- a/src/test/ui/consts/min_const_fn/min_const_fn_dyn.rs +++ b/src/test/ui/consts/min_const_fn/min_const_fn_dyn.rs @@ -11,6 +11,5 @@ const fn no_inner_dyn_trait2(x: Hide) { } const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) } //~^ ERROR trait bounds other than `Sized` -//~| ERROR temporary value dropped while borrowed fn main() {} diff --git a/src/test/ui/consts/min_const_fn/min_const_fn_dyn.stderr b/src/test/ui/consts/min_const_fn/min_const_fn_dyn.stderr index 0ea950d678f..e20b4f9dcb4 100644 --- a/src/test/ui/consts/min_const_fn/min_const_fn_dyn.stderr +++ b/src/test/ui/consts/min_const_fn/min_const_fn_dyn.stderr @@ -16,16 +16,6 @@ LL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) } = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563 = help: add `#![feature(const_fn)]` to the crate attributes to enable -error[E0716]: temporary value dropped while borrowed - --> $DIR/min_const_fn_dyn.rs:12:67 - | -LL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) } - | -^ - temporary value is freed at the end of this statement - | || - | |creates a temporary which is freed while still in use - | cast requires that borrow lasts for `'static` - -error: aborting due to 3 previous errors +error: aborting due to 2 previous errors -Some errors have detailed explanations: E0716, E0723. -For more information about an error, try `rustc --explain E0716`. +For more information about this error, try `rustc --explain E0723`. diff --git a/src/test/ui/if/ifmt-bad-arg.stderr b/src/test/ui/if/ifmt-bad-arg.stderr index 11dcc3a6d23..d65ffd85060 100644 --- a/src/test/ui/if/ifmt-bad-arg.stderr +++ b/src/test/ui/if/ifmt-bad-arg.stderr @@ -257,10 +257,10 @@ LL | println!("{} {:07$} {}", 1, 3.2, 4); = note: for information about formatting flags, visit https://doc.rust-lang.org/std/fmt/index.html error: unknown format trait `foo` - --> $DIR/ifmt-bad-arg.rs:86:24 + --> $DIR/ifmt-bad-arg.rs:86:17 | LL | println!("{:foo}", 1); - | ^ + | ^^^ | = note: the only appropriate formatting traits are: - ``, which uses the `Display` trait diff --git a/src/test/ui/if/ifmt-unknown-trait.stderr b/src/test/ui/if/ifmt-unknown-trait.stderr index 7853b5ca0c9..459432bf4e4 100644 --- a/src/test/ui/if/ifmt-unknown-trait.stderr +++ b/src/test/ui/if/ifmt-unknown-trait.stderr @@ -1,8 +1,8 @@ error: unknown format trait `notimplemented` - --> $DIR/ifmt-unknown-trait.rs:2:34 + --> $DIR/ifmt-unknown-trait.rs:2:16 | LL | format!("{:notimplemented}", "3"); - | ^^^ + | ^^^^^^^^^^^^^^ | = note: the only appropriate formatting traits are: - ``, which uses the `Display` trait |