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| author | bors <bors@rust-lang.org> | 2019-08-27 00:07:38 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2019-08-27 00:07:38 +0000 |
| commit | 0444b9f66acb5da23dc816e0d8eb59623ba9ea50 (patch) | |
| tree | 3121696aba5740b9bb02879924f6997b51b6785e | |
| parent | 9b91b9c10e3c87ed333a1e34c4f46ed68f1eee06 (diff) | |
| parent | 9c5c124d788962a65198e1e45987b094fd356914 (diff) | |
| download | rust-0444b9f66acb5da23dc816e0d8eb59623ba9ea50.tar.gz rust-0444b9f66acb5da23dc816e0d8eb59623ba9ea50.zip | |
Auto merge of #63926 - Centril:rollup-6kckn9n, r=Centril
Rollup of 6 pull requests Successful merges: - #63317 (Do not complain about unused code when used in `impl` `Self` type) - #63693 (Fully implement or-pattern parsing) - #63836 (VxWorks does not provide a way to set the task name except at creation time) - #63845 (Removed a confusing FnOnce example) - #63855 (Refactor feature gates) - #63921 (add link to FileCheck docs) Failed merges: r? @ghost
88 files changed, 1675 insertions, 564 deletions
diff --git a/src/libcore/ops/function.rs b/src/libcore/ops/function.rs index b9552eaa1a0..4a0a2720fe4 100644 --- a/src/libcore/ops/function.rs +++ b/src/libcore/ops/function.rs @@ -185,14 +185,6 @@ pub trait FnMut<Args> : FnOnce<Args> { /// /// # Examples /// -/// ## Calling a by-value closure -/// -/// ``` -/// let x = 5; -/// let square_x = move || x * x; -/// assert_eq!(square_x(), 25); -/// ``` -/// /// ## Using a `FnOnce` parameter /// /// ``` diff --git a/src/librustc/middle/dead.rs b/src/librustc/middle/dead.rs index 8ce8bb52566..d4805a7c783 100644 --- a/src/librustc/middle/dead.rs +++ b/src/librustc/middle/dead.rs @@ -30,10 +30,11 @@ fn should_explore(tcx: TyCtxt<'_>, hir_id: hir::HirId) -> bool { Some(Node::Item(..)) | Some(Node::ImplItem(..)) | Some(Node::ForeignItem(..)) | - Some(Node::TraitItem(..)) => - true, - _ => - false + Some(Node::TraitItem(..)) | + Some(Node::Variant(..)) | + Some(Node::AnonConst(..)) | + Some(Node::Pat(..)) => true, + _ => false } } @@ -75,7 +76,7 @@ impl<'a, 'tcx> MarkSymbolVisitor<'a, 'tcx> { self.check_def_id(res.def_id()); } _ if self.in_pat => {}, - Res::PrimTy(..) | Res::SelfTy(..) | Res::SelfCtor(..) | + Res::PrimTy(..) | Res::SelfCtor(..) | Res::Local(..) => {} Res::Def(DefKind::Ctor(CtorOf::Variant, ..), ctor_def_id) => { let variant_id = self.tcx.parent(ctor_def_id).unwrap(); @@ -92,6 +93,14 @@ impl<'a, 'tcx> MarkSymbolVisitor<'a, 'tcx> { self.check_def_id(variant_id); } } + Res::SelfTy(t, i) => { + if let Some(t) = t { + self.check_def_id(t); + } + if let Some(i) = i { + self.check_def_id(i); + } + } Res::ToolMod | Res::NonMacroAttr(..) | Res::Err => {} _ => { self.check_def_id(res.def_id()); @@ -271,7 +280,7 @@ impl<'a, 'tcx> Visitor<'tcx> for MarkSymbolVisitor<'a, 'tcx> { let res = self.tables.qpath_res(path, pat.hir_id); self.handle_field_pattern_match(pat, res, fields); } - PatKind::Path(ref qpath @ hir::QPath::TypeRelative(..)) => { + PatKind::Path(ref qpath) => { let res = self.tables.qpath_res(qpath, pat.hir_id); self.handle_res(res); } @@ -298,6 +307,11 @@ impl<'a, 'tcx> Visitor<'tcx> for MarkSymbolVisitor<'a, 'tcx> { } intravisit::walk_ty(self, ty); } + + fn visit_anon_const(&mut self, c: &'tcx hir::AnonConst) { + self.live_symbols.insert(c.hir_id); + intravisit::walk_anon_const(self, c); + } } fn has_allow_dead_code_or_lang_attr( diff --git a/src/libstd/sys/vxworks/thread.rs b/src/libstd/sys/vxworks/thread.rs index 58af8cbe48e..ef896f6a6e8 100644 --- a/src/libstd/sys/vxworks/thread.rs +++ b/src/libstd/sys/vxworks/thread.rs @@ -77,7 +77,7 @@ impl Thread { } pub fn set_name(_name: &CStr) { - assert!(false, "FIXME: set_name"); + // VxWorks does not provide a way to set the task name except at creation time } pub fn sleep(dur: Duration) { diff --git a/src/libsyntax/feature_gate/accepted.rs b/src/libsyntax/feature_gate/accepted.rs index 32a0b76d5f0..6c0b271c6c5 100644 --- a/src/libsyntax/feature_gate/accepted.rs +++ b/src/libsyntax/feature_gate/accepted.rs @@ -1,12 +1,24 @@ //! List of the accepted feature gates. -use crate::symbol::{Symbol, sym}; +use crate::symbol::sym; +use super::{State, Feature}; macro_rules! declare_features { - ($((accepted, $feature: ident, $ver: expr, $issue: expr, None),)+) => { + ($( + $(#[doc = $doc:tt])* (accepted, $feature:ident, $ver:expr, $issue:expr, None), + )+) => { /// Those language feature has since been Accepted (it was once Active) - pub const ACCEPTED_FEATURES: &[(Symbol, &str, Option<u32>, Option<&str>)] = &[ - $((sym::$feature, $ver, $issue, None)),+ + pub const ACCEPTED_FEATURES: &[Feature] = &[ + $( + Feature { + state: State::Accepted, + name: sym::$feature, + since: $ver, + issue: $issue, + edition: None, + description: concat!($($doc,)*), + } + ),+ ]; } } @@ -16,11 +28,11 @@ declare_features! ( // feature-group-start: for testing purposes // ------------------------------------------------------------------------- - // A temporary feature gate used to enable parser extensions needed - // to bootstrap fix for #5723. + /// A temporary feature gate used to enable parser extensions needed + /// to bootstrap fix for #5723. (accepted, issue_5723_bootstrap, "1.0.0", None, None), - // These are used to test this portion of the compiler, - // they don't actually mean anything. + /// These are used to test this portion of the compiler, + /// they don't actually mean anything. (accepted, test_accepted_feature, "1.0.0", None, None), // ------------------------------------------------------------------------- @@ -31,203 +43,203 @@ declare_features! ( // feature-group-start: accepted features // ------------------------------------------------------------------------- - // Allows using associated `type`s in `trait`s. + /// Allows using associated `type`s in `trait`s. (accepted, associated_types, "1.0.0", None, None), - // Allows using assigning a default type to type parameters in algebraic data type definitions. + /// Allows using assigning a default type to type parameters in algebraic data type definitions. (accepted, default_type_params, "1.0.0", None, None), // FIXME: explain `globs`. (accepted, globs, "1.0.0", None, None), - // Allows `macro_rules!` items. + /// Allows `macro_rules!` items. (accepted, macro_rules, "1.0.0", None, None), - // Allows use of `&foo[a..b]` as a slicing syntax. + /// Allows use of `&foo[a..b]` as a slicing syntax. (accepted, slicing_syntax, "1.0.0", None, None), - // Allows struct variants `Foo { baz: u8, .. }` in enums (RFC 418). + /// Allows struct variants `Foo { baz: u8, .. }` in enums (RFC 418). (accepted, struct_variant, "1.0.0", None, None), - // Allows indexing tuples. + /// Allows indexing tuples. (accepted, tuple_indexing, "1.0.0", None, None), - // Allows the use of `if let` expressions. + /// Allows the use of `if let` expressions. (accepted, if_let, "1.0.0", None, None), - // Allows the use of `while let` expressions. + /// Allows the use of `while let` expressions. (accepted, while_let, "1.0.0", None, None), - // Allows using `#![no_std]`. + /// Allows using `#![no_std]`. (accepted, no_std, "1.6.0", None, None), - // Allows overloading augmented assignment operations like `a += b`. + /// Allows overloading augmented assignment operations like `a += b`. (accepted, augmented_assignments, "1.8.0", Some(28235), None), - // Allows empty structs and enum variants with braces. + /// Allows empty structs and enum variants with braces. (accepted, braced_empty_structs, "1.8.0", Some(29720), None), - // Allows `#[deprecated]` attribute. + /// Allows `#[deprecated]` attribute. (accepted, deprecated, "1.9.0", Some(29935), None), - // Allows macros to appear in the type position. + /// Allows macros to appear in the type position. (accepted, type_macros, "1.13.0", Some(27245), None), - // Allows use of the postfix `?` operator in expressions. + /// Allows use of the postfix `?` operator in expressions. (accepted, question_mark, "1.13.0", Some(31436), None), - // Allows `..` in tuple (struct) patterns. + /// Allows `..` in tuple (struct) patterns. (accepted, dotdot_in_tuple_patterns, "1.14.0", Some(33627), None), - // Allows some increased flexibility in the name resolution rules, - // especially around globs and shadowing (RFC 1560). + /// Allows some increased flexibility in the name resolution rules, + /// especially around globs and shadowing (RFC 1560). (accepted, item_like_imports, "1.15.0", Some(35120), None), - // Allows using `Self` and associated types in struct expressions and patterns. + /// Allows using `Self` and associated types in struct expressions and patterns. (accepted, more_struct_aliases, "1.16.0", Some(37544), None), - // Allows elision of `'static` lifetimes in `static`s and `const`s. + /// Allows elision of `'static` lifetimes in `static`s and `const`s. (accepted, static_in_const, "1.17.0", Some(35897), None), - // Allows field shorthands (`x` meaning `x: x`) in struct literal expressions. + /// Allows field shorthands (`x` meaning `x: x`) in struct literal expressions. (accepted, field_init_shorthand, "1.17.0", Some(37340), None), - // Allows the definition recursive static items. + /// Allows the definition recursive static items. (accepted, static_recursion, "1.17.0", Some(29719), None), - // Allows `pub(restricted)` visibilities (RFC 1422). + /// Allows `pub(restricted)` visibilities (RFC 1422). (accepted, pub_restricted, "1.18.0", Some(32409), None), - // Allows `#![windows_subsystem]`. + /// Allows `#![windows_subsystem]`. (accepted, windows_subsystem, "1.18.0", Some(37499), None), - // Allows `break {expr}` with a value inside `loop`s. + /// Allows `break {expr}` with a value inside `loop`s. (accepted, loop_break_value, "1.19.0", Some(37339), None), - // Allows numeric fields in struct expressions and patterns. + /// Allows numeric fields in struct expressions and patterns. (accepted, relaxed_adts, "1.19.0", Some(35626), None), - // Allows coercing non capturing closures to function pointers. + /// Allows coercing non capturing closures to function pointers. (accepted, closure_to_fn_coercion, "1.19.0", Some(39817), None), - // Allows attributes on struct literal fields. + /// Allows attributes on struct literal fields. (accepted, struct_field_attributes, "1.20.0", Some(38814), None), - // Allows the definition of associated constants in `trait` or `impl` blocks. + /// Allows the definition of associated constants in `trait` or `impl` blocks. (accepted, associated_consts, "1.20.0", Some(29646), None), - // Allows usage of the `compile_error!` macro. + /// Allows usage of the `compile_error!` macro. (accepted, compile_error, "1.20.0", Some(40872), None), - // Allows code like `let x: &'static u32 = &42` to work (RFC 1414). + /// Allows code like `let x: &'static u32 = &42` to work (RFC 1414). (accepted, rvalue_static_promotion, "1.21.0", Some(38865), None), - // Allows `Drop` types in constants (RFC 1440). + /// Allows `Drop` types in constants (RFC 1440). (accepted, drop_types_in_const, "1.22.0", Some(33156), None), - // Allows the sysV64 ABI to be specified on all platforms - // instead of just the platforms on which it is the C ABI. + /// Allows the sysV64 ABI to be specified on all platforms + /// instead of just the platforms on which it is the C ABI. (accepted, abi_sysv64, "1.24.0", Some(36167), None), - // Allows `repr(align(16))` struct attribute (RFC 1358). + /// Allows `repr(align(16))` struct attribute (RFC 1358). (accepted, repr_align, "1.25.0", Some(33626), None), - // Allows '|' at beginning of match arms (RFC 1925). + /// Allows '|' at beginning of match arms (RFC 1925). (accepted, match_beginning_vert, "1.25.0", Some(44101), None), - // Allows nested groups in `use` items (RFC 2128). + /// Allows nested groups in `use` items (RFC 2128). (accepted, use_nested_groups, "1.25.0", Some(44494), None), - // Allows indexing into constant arrays. + /// Allows indexing into constant arrays. (accepted, const_indexing, "1.26.0", Some(29947), None), - // Allows using `a..=b` and `..=b` as inclusive range syntaxes. + /// Allows using `a..=b` and `..=b` as inclusive range syntaxes. (accepted, inclusive_range_syntax, "1.26.0", Some(28237), None), - // Allows `..=` in patterns (RFC 1192). + /// Allows `..=` in patterns (RFC 1192). (accepted, dotdoteq_in_patterns, "1.26.0", Some(28237), None), - // Allows `fn main()` with return types which implements `Termination` (RFC 1937). + /// Allows `fn main()` with return types which implements `Termination` (RFC 1937). (accepted, termination_trait, "1.26.0", Some(43301), None), - // Allows implementing `Clone` for closures where possible (RFC 2132). + /// Allows implementing `Clone` for closures where possible (RFC 2132). (accepted, clone_closures, "1.26.0", Some(44490), None), - // Allows implementing `Copy` for closures where possible (RFC 2132). + /// Allows implementing `Copy` for closures where possible (RFC 2132). (accepted, copy_closures, "1.26.0", Some(44490), None), - // Allows `impl Trait` in function arguments. + /// Allows `impl Trait` in function arguments. (accepted, universal_impl_trait, "1.26.0", Some(34511), None), - // Allows `impl Trait` in function return types. + /// Allows `impl Trait` in function return types. (accepted, conservative_impl_trait, "1.26.0", Some(34511), None), - // Allows using the `u128` and `i128` types. + /// Allows using the `u128` and `i128` types. (accepted, i128_type, "1.26.0", Some(35118), None), - // Allows default match binding modes (RFC 2005). + /// Allows default match binding modes (RFC 2005). (accepted, match_default_bindings, "1.26.0", Some(42640), None), - // Allows `'_` placeholder lifetimes. + /// Allows `'_` placeholder lifetimes. (accepted, underscore_lifetimes, "1.26.0", Some(44524), None), - // Allows attributes on lifetime/type formal parameters in generics (RFC 1327). + /// Allows attributes on lifetime/type formal parameters in generics (RFC 1327). (accepted, generic_param_attrs, "1.27.0", Some(48848), None), - // Allows `cfg(target_feature = "...")`. + /// Allows `cfg(target_feature = "...")`. (accepted, cfg_target_feature, "1.27.0", Some(29717), None), - // Allows `#[target_feature(...)]`. + /// Allows `#[target_feature(...)]`. (accepted, target_feature, "1.27.0", None, None), - // Allows using `dyn Trait` as a syntax for trait objects. + /// Allows using `dyn Trait` as a syntax for trait objects. (accepted, dyn_trait, "1.27.0", Some(44662), None), - // Allows `#[must_use]` on functions, and introduces must-use operators (RFC 1940). + /// Allows `#[must_use]` on functions, and introduces must-use operators (RFC 1940). (accepted, fn_must_use, "1.27.0", Some(43302), None), - // Allows use of the `:lifetime` macro fragment specifier. + /// Allows use of the `:lifetime` macro fragment specifier. (accepted, macro_lifetime_matcher, "1.27.0", Some(34303), None), - // Allows `#[test]` functions where the return type implements `Termination` (RFC 1937). + /// Allows `#[test]` functions where the return type implements `Termination` (RFC 1937). (accepted, termination_trait_test, "1.27.0", Some(48854), None), - // Allows the `#[global_allocator]` attribute. + /// Allows the `#[global_allocator]` attribute. (accepted, global_allocator, "1.28.0", Some(27389), None), - // Allows `#[repr(transparent)]` attribute on newtype structs. + /// Allows `#[repr(transparent)]` attribute on newtype structs. (accepted, repr_transparent, "1.28.0", Some(43036), None), - // Allows procedural macros in `proc-macro` crates. + /// Allows procedural macros in `proc-macro` crates. (accepted, proc_macro, "1.29.0", Some(38356), None), - // Allows `foo.rs` as an alternative to `foo/mod.rs`. + /// Allows `foo.rs` as an alternative to `foo/mod.rs`. (accepted, non_modrs_mods, "1.30.0", Some(44660), None), - // Allows use of the `:vis` macro fragment specifier + /// Allows use of the `:vis` macro fragment specifier (accepted, macro_vis_matcher, "1.30.0", Some(41022), None), - // Allows importing and reexporting macros with `use`, - // enables macro modularization in general. + /// Allows importing and reexporting macros with `use`, + /// enables macro modularization in general. (accepted, use_extern_macros, "1.30.0", Some(35896), None), - // Allows keywords to be escaped for use as identifiers. + /// Allows keywords to be escaped for use as identifiers. (accepted, raw_identifiers, "1.30.0", Some(48589), None), - // Allows attributes scoped to tools. + /// Allows attributes scoped to tools. (accepted, tool_attributes, "1.30.0", Some(44690), None), - // Allows multi-segment paths in attributes and derives. + /// Allows multi-segment paths in attributes and derives. (accepted, proc_macro_path_invoc, "1.30.0", Some(38356), None), - // Allows all literals in attribute lists and values of key-value pairs. + /// Allows all literals in attribute lists and values of key-value pairs. (accepted, attr_literals, "1.30.0", Some(34981), None), - // Allows inferring outlives requirements (RFC 2093). + /// Allows inferring outlives requirements (RFC 2093). (accepted, infer_outlives_requirements, "1.30.0", Some(44493), None), - // Allows annotating functions conforming to `fn(&PanicInfo) -> !` with `#[panic_handler]`. - // This defines the behavior of panics. + /// Allows annotating functions conforming to `fn(&PanicInfo) -> !` with `#[panic_handler]`. + /// This defines the behavior of panics. (accepted, panic_handler, "1.30.0", Some(44489), None), - // Allows `#[used]` to preserve symbols (see llvm.used). + /// Allows `#[used]` to preserve symbols (see llvm.used). (accepted, used, "1.30.0", Some(40289), None), - // Allows `crate` in paths. + /// Allows `crate` in paths. (accepted, crate_in_paths, "1.30.0", Some(45477), None), - // Allows resolving absolute paths as paths from other crates. + /// Allows resolving absolute paths as paths from other crates. (accepted, extern_absolute_paths, "1.30.0", Some(44660), None), - // Allows access to crate names passed via `--extern` through prelude. + /// Allows access to crate names passed via `--extern` through prelude. (accepted, extern_prelude, "1.30.0", Some(44660), None), - // Allows parentheses in patterns. + /// Allows parentheses in patterns. (accepted, pattern_parentheses, "1.31.0", Some(51087), None), - // Allows the definition of `const fn` functions. + /// Allows the definition of `const fn` functions. (accepted, min_const_fn, "1.31.0", Some(53555), None), - // Allows scoped lints. + /// Allows scoped lints. (accepted, tool_lints, "1.31.0", Some(44690), None), - // Allows lifetime elision in `impl` headers. For example: - // + `impl<I:Iterator> Iterator for &mut Iterator` - // + `impl Debug for Foo<'_>` + /// Allows lifetime elision in `impl` headers. For example: + /// + `impl<I:Iterator> Iterator for &mut Iterator` + /// + `impl Debug for Foo<'_>` (accepted, impl_header_lifetime_elision, "1.31.0", Some(15872), None), - // Allows `extern crate foo as bar;`. This puts `bar` into extern prelude. + /// Allows `extern crate foo as bar;`. This puts `bar` into extern prelude. (accepted, extern_crate_item_prelude, "1.31.0", Some(55599), None), - // Allows use of the `:literal` macro fragment specifier (RFC 1576). + /// Allows use of the `:literal` macro fragment specifier (RFC 1576). (accepted, macro_literal_matcher, "1.32.0", Some(35625), None), - // Allows use of `?` as the Kleene "at most one" operator in macros. + /// Allows use of `?` as the Kleene "at most one" operator in macros. (accepted, macro_at_most_once_rep, "1.32.0", Some(48075), None), - // Allows `Self` struct constructor (RFC 2302). + /// Allows `Self` struct constructor (RFC 2302). (accepted, self_struct_ctor, "1.32.0", Some(51994), None), - // Allows `Self` in type definitions (RFC 2300). + /// Allows `Self` in type definitions (RFC 2300). (accepted, self_in_typedefs, "1.32.0", Some(49303), None), - // Allows `use x::y;` to search `x` in the current scope. + /// Allows `use x::y;` to search `x` in the current scope. (accepted, uniform_paths, "1.32.0", Some(53130), None), - // Allows integer match exhaustiveness checking (RFC 2591). + /// Allows integer match exhaustiveness checking (RFC 2591). (accepted, exhaustive_integer_patterns, "1.33.0", Some(50907), None), - // Allows `use path as _;` and `extern crate c as _;`. + /// Allows `use path as _;` and `extern crate c as _;`. (accepted, underscore_imports, "1.33.0", Some(48216), None), - // Allows `#[repr(packed(N))]` attribute on structs. + /// Allows `#[repr(packed(N))]` attribute on structs. (accepted, repr_packed, "1.33.0", Some(33158), None), - // Allows irrefutable patterns in `if let` and `while let` statements (RFC 2086). + /// Allows irrefutable patterns in `if let` and `while let` statements (RFC 2086). (accepted, irrefutable_let_patterns, "1.33.0", Some(44495), None), - // Allows calling `const unsafe fn` inside `unsafe` blocks in `const fn` functions. + /// Allows calling `const unsafe fn` inside `unsafe` blocks in `const fn` functions. (accepted, min_const_unsafe_fn, "1.33.0", Some(55607), None), - // Allows let bindings, assignments and destructuring in `const` functions and constants. - // As long as control flow is not implemented in const eval, `&&` and `||` may not be used - // at the same time as let bindings. + /// Allows let bindings, assignments and destructuring in `const` functions and constants. + /// As long as control flow is not implemented in const eval, `&&` and `||` may not be used + /// at the same time as let bindings. (accepted, const_let, "1.33.0", Some(48821), None), - // Allows `#[cfg_attr(predicate, multiple, attributes, here)]`. + /// Allows `#[cfg_attr(predicate, multiple, attributes, here)]`. (accepted, cfg_attr_multi, "1.33.0", Some(54881), None), - // Allows top level or-patterns (`p | q`) in `if let` and `while let`. + /// Allows top level or-patterns (`p | q`) in `if let` and `while let`. (accepted, if_while_or_patterns, "1.33.0", Some(48215), None), - // Allows `cfg(target_vendor = "...")`. + /// Allows `cfg(target_vendor = "...")`. (accepted, cfg_target_vendor, "1.33.0", Some(29718), None), - // Allows `extern crate self as foo;`. - // This puts local crate root into extern prelude under name `foo`. + /// Allows `extern crate self as foo;`. + /// This puts local crate root into extern prelude under name `foo`. (accepted, extern_crate_self, "1.34.0", Some(56409), None), - // Allows arbitrary delimited token streams in non-macro attributes. + /// Allows arbitrary delimited token streams in non-macro attributes. (accepted, unrestricted_attribute_tokens, "1.34.0", Some(55208), None), - // Allows paths to enum variants on type aliases including `Self`. + /// Allows paths to enum variants on type aliases including `Self`. (accepted, type_alias_enum_variants, "1.37.0", Some(49683), None), - // Allows using `#[repr(align(X))]` on enums with equivalent semantics - // to wrapping an enum in a wrapper struct with `#[repr(align(X))]`. + /// Allows using `#[repr(align(X))]` on enums with equivalent semantics + /// to wrapping an enum in a wrapper struct with `#[repr(align(X))]`. (accepted, repr_align_enum, "1.37.0", Some(57996), None), - // Allows `const _: TYPE = VALUE`. + /// Allows `const _: TYPE = VALUE`. (accepted, underscore_const_names, "1.37.0", Some(54912), None), - // Allows free and inherent `async fn`s, `async` blocks, and `<expr>.await` expressions. + /// Allows free and inherent `async fn`s, `async` blocks, and `<expr>.await` expressions. (accepted, async_await, "1.39.0", Some(50547), None), // ------------------------------------------------------------------------- diff --git a/src/libsyntax/feature_gate/active.rs b/src/libsyntax/feature_gate/active.rs index 0bff4ed24a4..c947b09fdcb 100644 --- a/src/libsyntax/feature_gate/active.rs +++ b/src/libsyntax/feature_gate/active.rs @@ -3,6 +3,7 @@ use crate::edition::Edition; use crate::symbol::{Symbol, sym}; use syntax_pos::Span; +use super::{State, Feature}; macro_rules! set { ($field: ident) => {{ @@ -14,12 +15,24 @@ macro_rules! set { } macro_rules! declare_features { - ($((active, $feature: ident, $ver: expr, $issue: expr, $edition: expr),)+) => { + ($( + $(#[doc = $doc:tt])* (active, $feature:ident, $ver:expr, $issue:expr, $edition:expr), + )+) => { /// Represents active features that are currently being implemented or /// currently being considered for addition/removal. pub const ACTIVE_FEATURES: - &[(Symbol, &str, Option<u32>, Option<Edition>, fn(&mut Features, Span))] = - &[$((sym::$feature, $ver, $issue, $edition, set!($feature))),+]; + &[Feature] = + &[$( + // (sym::$feature, $ver, $issue, $edition, set!($feature)) + Feature { + state: State::Active { set: set!($feature) }, + name: sym::$feature, + since: $ver, + issue: $issue, + edition: $edition, + description: concat!($($doc,)*), + } + ),+]; /// A set of features to be used by later passes. #[derive(Clone)] @@ -28,7 +41,10 @@ macro_rules! declare_features { pub declared_lang_features: Vec<(Symbol, Span, Option<Symbol>)>, /// `#![feature]` attrs for non-language (library) features pub declared_lib_features: Vec<(Symbol, Span)>, - $(pub $feature: bool),+ + $( + $(#[doc = $doc])* + pub $feature: bool + ),+ } impl Features { @@ -49,6 +65,16 @@ macro_rules! declare_features { }; } +impl Feature { + /// Set this feature in `Features`. Panics if called on a non-active feature. + pub fn set(&self, features: &mut Features, span: Span) { + match self.state { + State::Active { set } => set(features, span), + _ => panic!("Called `set` on feature `{}` which is not `active`", self.name) + } + } +} + // If you change this, please modify `src/doc/unstable-book` as well. // // Don't ever remove anything from this list; move them to `removed.rs`. @@ -58,7 +84,7 @@ macro_rules! declare_features { // stable (active). // // Note that the features are grouped into internal/user-facing and then -// sorted by version inside those groups. This is inforced with tidy. +// sorted by version inside those groups. This is enforced with tidy. // // N.B., `tools/tidy/src/features.rs` parses this information directly out of the // source, so take care when modifying it. @@ -70,127 +96,127 @@ declare_features! ( // no-tracking-issue-start - // Allows using compiler's own crates. + /// Allows using compiler's own crates. (active, rustc_private, "1.0.0", Some(27812), None), - // Allows using the `rust-intrinsic`'s "ABI". + /// Allows using the `rust-intrinsic`'s "ABI". (active, intrinsics, "1.0.0", None, None), - // Allows using `#[lang = ".."]` attribute for linking items to special compiler logic. + /// Allows using `#[lang = ".."]` attribute for linking items to special compiler logic. (active, lang_items, "1.0.0", None, None), - // Allows using the `#[stable]` and `#[unstable]` attributes. + /// Allows using the `#[stable]` and `#[unstable]` attributes. (active, staged_api, "1.0.0", None, None), - // Allows using `#[allow_internal_unstable]`. This is an - // attribute on `macro_rules!` and can't use the attribute handling - // below (it has to be checked before expansion possibly makes - // macros disappear). + /// Allows using `#[allow_internal_unstable]`. This is an + /// attribute on `macro_rules!` and can't use the attribute handling + /// below (it has to be checked before expansion possibly makes + /// macros disappear). (active, allow_internal_unstable, "1.0.0", None, None), - // Allows using `#[allow_internal_unsafe]`. This is an - // attribute on `macro_rules!` and can't use the attribute handling - // below (it has to be checked before expansion possibly makes - // macros disappear). + /// Allows using `#[allow_internal_unsafe]`. This is an + /// attribute on `macro_rules!` and can't use the attribute handling + /// below (it has to be checked before expansion possibly makes + /// macros disappear). (active, allow_internal_unsafe, "1.0.0", None, None), - // Allows using the macros: - // + `__diagnostic_used` - // + `__register_diagnostic` - // +`__build_diagnostic_array` + /// Allows using the macros: + /// + `__diagnostic_used` + /// + `__register_diagnostic` + /// +`__build_diagnostic_array` (active, rustc_diagnostic_macros, "1.0.0", None, None), - // Allows using `#[rustc_const_unstable(feature = "foo", ..)]` which - // lets a function to be `const` when opted into with `#![feature(foo)]`. + /// Allows using `#[rustc_const_unstable(feature = "foo", ..)]` which + /// lets a function to be `const` when opted into with `#![feature(foo)]`. (active, rustc_const_unstable, "1.0.0", None, None), - // no-tracking-issue-end + /// no-tracking-issue-end - // Allows using `#[link_name="llvm.*"]`. + /// Allows using `#[link_name="llvm.*"]`. (active, link_llvm_intrinsics, "1.0.0", Some(29602), None), - // Allows using `rustc_*` attributes (RFC 572). + /// Allows using `rustc_*` attributes (RFC 572). (active, rustc_attrs, "1.0.0", Some(29642), None), - // Allows using `#[on_unimplemented(..)]` on traits. + /// Allows using `#[on_unimplemented(..)]` on traits. (active, on_unimplemented, "1.0.0", Some(29628), None), - // Allows using the `box $expr` syntax. + /// Allows using the `box $expr` syntax. (active, box_syntax, "1.0.0", Some(49733), None), - // Allows using `#[main]` to replace the entrypoint `#[lang = "start"]` calls. + /// Allows using `#[main]` to replace the entrypoint `#[lang = "start"]` calls. (active, main, "1.0.0", Some(29634), None), - // Allows using `#[start]` on a function indicating that it is the program entrypoint. + /// Allows using `#[start]` on a function indicating that it is the program entrypoint. (active, start, "1.0.0", Some(29633), None), - // Allows using the `#[fundamental]` attribute. + /// Allows using the `#[fundamental]` attribute. (active, fundamental, "1.0.0", Some(29635), None), - // Allows using the `rust-call` ABI. + /// Allows using the `rust-call` ABI. (active, unboxed_closures, "1.0.0", Some(29625), None), - // Allows using the `#[linkage = ".."]` attribute. + /// Allows using the `#[linkage = ".."]` attribute. (active, linkage, "1.0.0", Some(29603), None), - // Allows features specific to OIBIT (auto traits). + /// Allows features specific to OIBIT (auto traits). (active, optin_builtin_traits, "1.0.0", Some(13231), None), - // Allows using `box` in patterns (RFC 469). + /// Allows using `box` in patterns (RFC 469). (active, box_patterns, "1.0.0", Some(29641), None), // no-tracking-issue-start - // Allows using `#[prelude_import]` on glob `use` items. + /// Allows using `#[prelude_import]` on glob `use` items. (active, prelude_import, "1.2.0", None, None), // no-tracking-issue-end // no-tracking-issue-start - // Allows using `#[omit_gdb_pretty_printer_section]`. + /// Allows using `#[omit_gdb_pretty_printer_section]`. (active, omit_gdb_pretty_printer_section, "1.5.0", None, None), - // Allows using the `vectorcall` ABI. + /// Allows using the `vectorcall` ABI. (active, abi_vectorcall, "1.7.0", None, None), // no-tracking-issue-end - // Allows using `#[structural_match]` which indicates that a type is structurally matchable. + /// Allows using `#[structural_match]` which indicates that a type is structurally matchable. (active, structural_match, "1.8.0", Some(31434), None), - // Allows using the `may_dangle` attribute (RFC 1327). + /// Allows using the `may_dangle` attribute (RFC 1327). (active, dropck_eyepatch, "1.10.0", Some(34761), None), - // Allows using the `#![panic_runtime]` attribute. + /// Allows using the `#![panic_runtime]` attribute. (active, panic_runtime, "1.10.0", Some(32837), None), - // Allows declaring with `#![needs_panic_runtime]` that a panic runtime is needed. + /// Allows declaring with `#![needs_panic_runtime]` that a panic runtime is needed. (active, needs_panic_runtime, "1.10.0", Some(32837), None), // no-tracking-issue-start - // Allows identifying the `compiler_builtins` crate. + /// Allows identifying the `compiler_builtins` crate. (active, compiler_builtins, "1.13.0", None, None), - // Allows using the `unadjusted` ABI; perma-unstable. + /// Allows using the `unadjusted` ABI; perma-unstable. (active, abi_unadjusted, "1.16.0", None, None), - // Allows identifying crates that contain sanitizer runtimes. + /// Allows identifying crates that contain sanitizer runtimes. (active, sanitizer_runtime, "1.17.0", None, None), - // Used to identify crates that contain the profiler runtime. + /// Used to identify crates that contain the profiler runtime. (active, profiler_runtime, "1.18.0", None, None), - // Allows using the `thiscall` ABI. + /// Allows using the `thiscall` ABI. (active, abi_thiscall, "1.19.0", None, None), - // Allows using `#![needs_allocator]`, an implementation detail of `#[global_allocator]`. + /// Allows using `#![needs_allocator]`, an implementation detail of `#[global_allocator]`. (active, allocator_internals, "1.20.0", None, None), // no-tracking-issue-end - // Added for testing E0705; perma-unstable. + /// Added for testing E0705; perma-unstable. (active, test_2018_feature, "1.31.0", Some(0), Some(Edition::Edition2018)), // ------------------------------------------------------------------------- @@ -228,281 +254,282 @@ declare_features! ( // feature-group-start: actual feature gates // ------------------------------------------------------------------------- - // Allows using the `#[link_args]` attribute. + /// Allows using the `#[link_args]` attribute. (active, link_args, "1.0.0", Some(29596), None), - // Allows defining identifiers beyond ASCII. + /// Allows defining identifiers beyond ASCII. (active, non_ascii_idents, "1.0.0", Some(55467), None), - // Allows using `#[plugin_registrar]` on functions. + /// Allows using `#[plugin_registrar]` on functions. (active, plugin_registrar, "1.0.0", Some(29597), None), - // Allows using `#![plugin(myplugin)]`. + /// Allows using `#![plugin(myplugin)]`. (active, plugin, "1.0.0", Some(29597), None), - // Allows using `#[thread_local]` on `static` items. + /// Allows using `#[thread_local]` on `static` items. (active, thread_local, "1.0.0", Some(29594), None), - // Allows the use of SIMD types in functions declared in `extern` blocks. + /// Allows the use of SIMD types in functions declared in `extern` blocks. (active, simd_ffi, "1.0.0", Some(27731), None), - // Allows using custom attributes (RFC 572). + /// Allows using custom attributes (RFC 572). (active, custom_attribute, "1.0.0", Some(29642), None), - // Allows using non lexical lifetimes (RFC 2094). + /// Allows using non lexical lifetimes (RFC 2094). (active, nll, "1.0.0", Some(43234), None), - // Allows using slice patterns. + /// Allows using slice patterns. (active, slice_patterns, "1.0.0", Some(62254), None), - // Allows the definition of `const` functions with some advanced features. + /// Allows the definition of `const` functions with some advanced features. (active, const_fn, "1.2.0", Some(57563), None), - // Allows associated type defaults. + /// Allows associated type defaults. (active, associated_type_defaults, "1.2.0", Some(29661), None), - // Allows `#![no_core]`. + /// Allows `#![no_core]`. (active, no_core, "1.3.0", Some(29639), None), - // Allows default type parameters to influence type inference. + /// Allows default type parameters to influence type inference. (active, default_type_parameter_fallback, "1.3.0", Some(27336), None), - // Allows `repr(simd)` and importing the various simd intrinsics. + /// Allows `repr(simd)` and importing the various simd intrinsics. (active, repr_simd, "1.4.0", Some(27731), None), - // Allows `extern "platform-intrinsic" { ... }`. + /// Allows `extern "platform-intrinsic" { ... }`. (active, platform_intrinsics, "1.4.0", Some(27731), None), - // Allows `#[unwind(..)]`. - // - // Permits specifying whether a function should permit unwinding or abort on unwind. + /// Allows `#[unwind(..)]`. + /// + /// Permits specifying whether a function should permit unwinding or abort on unwind. (active, unwind_attributes, "1.4.0", Some(58760), None), - // Allows `#[no_debug]`. + /// Allows `#[no_debug]`. (active, no_debug, "1.5.0", Some(29721), None), - // Allows attributes on expressions and non-item statements. + /// Allows attributes on expressions and non-item statements. (active, stmt_expr_attributes, "1.6.0", Some(15701), None), - // Allows the use of type ascription in expressions. + /// Allows the use of type ascription in expressions. (active, type_ascription, "1.6.0", Some(23416), None), - // Allows `cfg(target_thread_local)`. + /// Allows `cfg(target_thread_local)`. (active, cfg_target_thread_local, "1.7.0", Some(29594), None), - // Allows specialization of implementations (RFC 1210). + /// Allows specialization of implementations (RFC 1210). (active, specialization, "1.7.0", Some(31844), None), - // Allows using `#[naked]` on functions. + /// Allows using `#[naked]` on functions. (active, naked_functions, "1.9.0", Some(32408), None), - // Allows `cfg(target_has_atomic = "...")`. + /// Allows `cfg(target_has_atomic = "...")`. (active, cfg_target_has_atomic, "1.9.0", Some(32976), None), - // Allows `X..Y` patterns. + /// Allows `X..Y` patterns. (active, exclusive_range_pattern, "1.11.0", Some(37854), None), - // Allows the `!` type. Does not imply 'exhaustive_patterns' (below) any more. + /// Allows the `!` type. Does not imply 'exhaustive_patterns' (below) any more. (active, never_type, "1.13.0", Some(35121), None), - // Allows exhaustive pattern matching on types that contain uninhabited types. + /// Allows exhaustive pattern matching on types that contain uninhabited types. (active, exhaustive_patterns, "1.13.0", Some(51085), None), - // Allows untagged unions `union U { ... }`. + /// Allows untagged unions `union U { ... }`. (active, untagged_unions, "1.13.0", Some(32836), None), - // Allows `#[link(..., cfg(..))]`. + /// Allows `#[link(..., cfg(..))]`. (active, link_cfg, "1.14.0", Some(37406), None), - // Allows `extern "ptx-*" fn()`. + /// Allows `extern "ptx-*" fn()`. (active, abi_ptx, "1.15.0", Some(38788), None), - // Allows the `#[repr(i128)]` attribute for enums. + /// Allows the `#[repr(i128)]` attribute for enums. (active, repr128, "1.16.0", Some(35118), None), - // Allows `#[link(kind="static-nobundle"...)]`. + /// Allows `#[link(kind="static-nobundle"...)]`. (active, static_nobundle, "1.16.0", Some(37403), None), - // Allows `extern "msp430-interrupt" fn()`. + /// Allows `extern "msp430-interrupt" fn()`. (active, abi_msp430_interrupt, "1.16.0", Some(38487), None), - // Allows declarative macros 2.0 (`macro`). + /// Allows declarative macros 2.0 (`macro`). (active, decl_macro, "1.17.0", Some(39412), None), - // Allows `extern "x86-interrupt" fn()`. + /// Allows `extern "x86-interrupt" fn()`. (active, abi_x86_interrupt, "1.17.0", Some(40180), None), - // Allows overlapping impls of marker traits. + /// Allows overlapping impls of marker traits. (active, overlapping_marker_traits, "1.18.0", Some(29864), None), - // Allows a test to fail without failing the whole suite. + /// Allows a test to fail without failing the whole suite. (active, allow_fail, "1.19.0", Some(46488), None), - // Allows unsized tuple coercion. + /// Allows unsized tuple coercion. (active, unsized_tuple_coercion, "1.20.0", Some(42877), None), - // Allows defining generators. + /// Allows defining generators. (active, generators, "1.21.0", Some(43122), None), - // Allows `#[doc(cfg(...))]`. + /// Allows `#[doc(cfg(...))]`. (active, doc_cfg, "1.21.0", Some(43781), None), - // Allows `#[doc(masked)]`. + /// Allows `#[doc(masked)]`. (active, doc_masked, "1.21.0", Some(44027), None), - // Allows `#[doc(spotlight)]`. + /// Allows `#[doc(spotlight)]`. (active, doc_spotlight, "1.22.0", Some(45040), None), - // Allows `#[doc(include = "some-file")]`. + /// Allows `#[doc(include = "some-file")]`. (active, external_doc, "1.22.0", Some(44732), None), - // Allows future-proofing enums/structs with the `#[non_exhaustive]` attribute (RFC 2008). + /// Allows future-proofing enums/structs with the `#[non_exhaustive]` attribute (RFC 2008). (active, non_exhaustive, "1.22.0", Some(44109), None), - // Allows using `crate` as visibility modifier, synonymous with `pub(crate)`. + /// Allows using `crate` as visibility modifier, synonymous with `pub(crate)`. (active, crate_visibility_modifier, "1.23.0", Some(53120), None), - // Allows defining `extern type`s. + /// Allows defining `extern type`s. (active, extern_types, "1.23.0", Some(43467), None), - // Allows trait methods with arbitrary self types. + /// Allows trait methods with arbitrary self types. (active, arbitrary_self_types, "1.23.0", Some(44874), None), - // Allows in-band quantification of lifetime bindings (e.g., `fn foo(x: &'a u8) -> &'a u8`). + /// Allows in-band quantification of lifetime bindings (e.g., `fn foo(x: &'a u8) -> &'a u8`). (active, in_band_lifetimes, "1.23.0", Some(44524), None), - // Allows associated types to be generic, e.g., `type Foo<T>;` (RFC 1598). + /// Allows associated types to be generic, e.g., `type Foo<T>;` (RFC 1598). (active, generic_associated_types, "1.23.0", Some(44265), None), - // Allows defining `trait X = A + B;` alias items. + /// Allows defining `trait X = A + B;` alias items. (active, trait_alias, "1.24.0", Some(41517), None), - // Allows infering `'static` outlives requirements (RFC 2093). + /// Allows infering `'static` outlives requirements (RFC 2093). (active, infer_static_outlives_requirements, "1.26.0", Some(54185), None), - // Allows macro invocations in `extern {}` blocks. + /// Allows macro invocations in `extern {}` blocks. (active, macros_in_extern, "1.27.0", Some(49476), None), - // Allows accessing fields of unions inside `const` functions. + /// Allows accessing fields of unions inside `const` functions. (active, const_fn_union, "1.27.0", Some(51909), None), - // Allows casting raw pointers to `usize` during const eval. + /// Allows casting raw pointers to `usize` during const eval. (active, const_raw_ptr_to_usize_cast, "1.27.0", Some(51910), None), - // Allows dereferencing raw pointers during const eval. + /// Allows dereferencing raw pointers during const eval. (active, const_raw_ptr_deref, "1.27.0", Some(51911), None), - // Allows comparing raw pointers during const eval. + /// Allows comparing raw pointers during const eval. (active, const_compare_raw_pointers, "1.27.0", Some(53020), None), - // Allows `#[doc(alias = "...")]`. + /// Allows `#[doc(alias = "...")]`. (active, doc_alias, "1.27.0", Some(50146), None), - // Allows inconsistent bounds in where clauses. + /// Allows inconsistent bounds in where clauses. (active, trivial_bounds, "1.28.0", Some(48214), None), - // Allows `'a: { break 'a; }`. + /// Allows `'a: { break 'a; }`. (active, label_break_value, "1.28.0", Some(48594), None), - // Allows using `#[doc(keyword = "...")]`. + /// Allows using `#[doc(keyword = "...")]`. (active, doc_keyword, "1.28.0", Some(51315), None), - // Allows reinterpretation of the bits of a value of one type as another type during const eval. + /// Allows reinterpretation of the bits of a value of one type as another + /// type during const eval. (active, const_transmute, "1.29.0", Some(53605), None), - // Allows using `try {...}` expressions. + /// Allows using `try {...}` expressions. (active, try_blocks, "1.29.0", Some(31436), None), - // Allows defining an `#[alloc_error_handler]`. + /// Allows defining an `#[alloc_error_handler]`. (active, alloc_error_handler, "1.29.0", Some(51540), None), - // Allows using the `amdgpu-kernel` ABI. + /// Allows using the `amdgpu-kernel` ABI. (active, abi_amdgpu_kernel, "1.29.0", Some(51575), None), - // Allows panicking during const eval (producing compile-time errors). + /// Allows panicking during const eval (producing compile-time errors). (active, const_panic, "1.30.0", Some(51999), None), - // Allows `#[marker]` on certain traits allowing overlapping implementations. + /// Allows `#[marker]` on certain traits allowing overlapping implementations. (active, marker_trait_attr, "1.30.0", Some(29864), None), - // Allows macro invocations on modules expressions and statements and - // procedural macros to expand to non-items. + /// Allows macro invocations on modules expressions and statements and + /// procedural macros to expand to non-items. (active, proc_macro_hygiene, "1.30.0", Some(54727), None), - // Allows unsized rvalues at arguments and parameters. + /// Allows unsized rvalues at arguments and parameters. (active, unsized_locals, "1.30.0", Some(48055), None), - // Allows custom test frameworks with `#![test_runner]` and `#[test_case]`. + /// Allows custom test frameworks with `#![test_runner]` and `#[test_case]`. (active, custom_test_frameworks, "1.30.0", Some(50297), None), - // Allows non-builtin attributes in inner attribute position. + /// Allows non-builtin attributes in inner attribute position. (active, custom_inner_attributes, "1.30.0", Some(54726), None), - // Allows mixing bind-by-move in patterns and references to those identifiers in guards. + /// Allows mixing bind-by-move in patterns and references to those identifiers in guards. (active, bind_by_move_pattern_guards, "1.30.0", Some(15287), None), - // Allows `impl Trait` in bindings (`let`, `const`, `static`). + /// Allows `impl Trait` in bindings (`let`, `const`, `static`). (active, impl_trait_in_bindings, "1.30.0", Some(63065), None), - // Allows using `reason` in lint attributes and the `#[expect(lint)]` lint check. + /// Allows using `reason` in lint attributes and the `#[expect(lint)]` lint check. (active, lint_reasons, "1.31.0", Some(54503), None), - // Allows exhaustive integer pattern matching on `usize` and `isize`. + /// Allows exhaustive integer pattern matching on `usize` and `isize`. (active, precise_pointer_size_matching, "1.32.0", Some(56354), None), - // Allows relaxing the coherence rules such that - // `impl<T> ForeignTrait<LocalType> for ForeignType<T> is permitted. + /// Allows relaxing the coherence rules such that + /// `impl<T> ForeignTrait<LocalType> for ForeignType<T> is permitted. (active, re_rebalance_coherence, "1.32.0", Some(55437), None), - // Allows using `#[ffi_returns_twice]` on foreign functions. + /// Allows using `#[ffi_returns_twice]` on foreign functions. (active, ffi_returns_twice, "1.34.0", Some(58314), None), - // Allows const generic types (e.g. `struct Foo<const N: usize>(...);`). + /// Allows const generic types (e.g. `struct Foo<const N: usize>(...);`). (active, const_generics, "1.34.0", Some(44580), None), - // Allows using `#[optimize(X)]`. + /// Allows using `#[optimize(X)]`. (active, optimize_attribute, "1.34.0", Some(54882), None), - // Allows using C-variadics. + /// Allows using C-variadics. (active, c_variadic, "1.34.0", Some(44930), None), - // Allows the user of associated type bounds. + /// Allows the user of associated type bounds. (active, associated_type_bounds, "1.34.0", Some(52662), None), - // Attributes on formal function params. + /// Attributes on formal function params. (active, param_attrs, "1.36.0", Some(60406), None), - // Allows calling constructor functions in `const fn`. + /// Allows calling constructor functions in `const fn`. (active, const_constructor, "1.37.0", Some(61456), None), - // Allows `if/while p && let q = r && ...` chains. + /// Allows `if/while p && let q = r && ...` chains. (active, let_chains, "1.37.0", Some(53667), None), - // Allows #[repr(transparent)] on enums (RFC 2645). + /// Allows #[repr(transparent)] on enums (RFC 2645). (active, transparent_enums, "1.37.0", Some(60405), None), - // Allows #[repr(transparent)] on unions (RFC 2645). + /// Allows #[repr(transparent)] on unions (RFC 2645). (active, transparent_unions, "1.37.0", Some(60405), None), - // Allows explicit discriminants on non-unit enum variants. + /// Allows explicit discriminants on non-unit enum variants. (active, arbitrary_enum_discriminant, "1.37.0", Some(60553), None), - // Allows `impl Trait` with multiple unrelated lifetimes. + /// Allows `impl Trait` with multiple unrelated lifetimes. (active, member_constraints, "1.37.0", Some(61977), None), - // Allows `async || body` closures. + /// Allows `async || body` closures. (active, async_closure, "1.37.0", Some(62290), None), - // Allows the use of `#[cfg(doctest)]`, set when rustdoc is collecting doctests + /// Allows the use of `#[cfg(doctest)]`, set when rustdoc is collecting doctests (active, cfg_doctest, "1.37.0", Some(62210), None), - // Allows `[x; N]` where `x` is a constant (RFC 2203). + /// Allows `[x; N]` where `x` is a constant (RFC 2203). (active, const_in_array_repeat_expressions, "1.37.0", Some(49147), None), - // Allows `impl Trait` to be used inside type aliases (RFC 2515). + /// Allows `impl Trait` to be used inside type aliases (RFC 2515). (active, type_alias_impl_trait, "1.38.0", Some(63063), None), - // Allows the use of or-patterns, e.g. `0 | 1`. + /// Allows the use of or-patterns, e.g. `0 | 1`. (active, or_patterns, "1.38.0", Some(54883), None), // ------------------------------------------------------------------------- diff --git a/src/libsyntax/feature_gate/check.rs b/src/libsyntax/feature_gate/check.rs index d82b287b6fb..f3a9d135125 100644 --- a/src/libsyntax/feature_gate/check.rs +++ b/src/libsyntax/feature_gate/check.rs @@ -1,4 +1,4 @@ -use super::active::{ACTIVE_FEATURES, Features}; +use super::{active::{ACTIVE_FEATURES, Features}, Feature, State as FeatureState}; use super::accepted::ACCEPTED_FEATURES; use super::removed::{REMOVED_FEATURES, STABLE_REMOVED_FEATURES}; use super::builtin_attrs::{AttributeGate, AttributeType, BuiltinAttribute, BUILTIN_ATTRIBUTE_MAP}; @@ -127,17 +127,16 @@ pub fn check_attribute(attr: &ast::Attribute, parse_sess: &ParseSess, features: } fn find_lang_feature_issue(feature: Symbol) -> Option<u32> { - if let Some(info) = ACTIVE_FEATURES.iter().find(|t| t.0 == feature) { - let issue = info.2; + if let Some(info) = ACTIVE_FEATURES.iter().find(|t| t.name == feature) { // FIXME (#28244): enforce that active features have issue numbers - // assert!(issue.is_some()) - issue + // assert!(info.issue.is_some()) + info.issue } else { // search in Accepted, Removed, or Stable Removed features let found = ACCEPTED_FEATURES.iter().chain(REMOVED_FEATURES).chain(STABLE_REMOVED_FEATURES) - .find(|t| t.0 == feature); + .find(|t| t.name == feature); match found { - Some(&(_, _, issue, _)) => issue, + Some(&Feature { issue, .. }) => issue, None => panic!("Feature `{}` is not declared anywhere", feature), } } @@ -733,13 +732,9 @@ pub fn get_features(span_handler: &Handler, krate_attrs: &[ast::Attribute], } } - for &(name, .., f_edition, set) in ACTIVE_FEATURES { - if let Some(f_edition) = f_edition { - if f_edition <= crate_edition { - set(&mut features, DUMMY_SP); - edition_enabled_features.insert(name, crate_edition); - } - } + for feature in active_features_up_to(crate_edition) { + feature.set(&mut features, DUMMY_SP); + edition_enabled_features.insert(feature.name, crate_edition); } // Process the edition umbrella feature-gates first, to ensure @@ -761,20 +756,17 @@ pub fn get_features(span_handler: &Handler, krate_attrs: &[ast::Attribute], let name = mi.name_or_empty(); - if let Some(edition) = ALL_EDITIONS.iter().find(|e| name == e.feature_name()) { - if *edition <= crate_edition { + let edition = ALL_EDITIONS.iter().find(|e| name == e.feature_name()).copied(); + if let Some(edition) = edition { + if edition <= crate_edition { continue; } - for &(name, .., f_edition, set) in ACTIVE_FEATURES { - if let Some(f_edition) = f_edition { - if f_edition <= *edition { - // FIXME(Manishearth) there is currently no way to set - // lib features by edition - set(&mut features, DUMMY_SP); - edition_enabled_features.insert(name, *edition); - } - } + for feature in active_features_up_to(edition) { + // FIXME(Manishearth) there is currently no way to set + // lib features by edition + feature.set(&mut features, DUMMY_SP); + edition_enabled_features.insert(feature.name, edition); } } } @@ -829,14 +821,18 @@ pub fn get_features(span_handler: &Handler, krate_attrs: &[ast::Attribute], continue; } - let removed = REMOVED_FEATURES.iter().find(|f| name == f.0); - let stable_removed = STABLE_REMOVED_FEATURES.iter().find(|f| name == f.0); - if let Some((.., reason)) = removed.or(stable_removed) { - feature_removed(span_handler, mi.span(), *reason); - continue; + let removed = REMOVED_FEATURES.iter().find(|f| name == f.name); + let stable_removed = STABLE_REMOVED_FEATURES.iter().find(|f| name == f.name); + if let Some(Feature { state, .. }) = removed.or(stable_removed) { + if let FeatureState::Removed { reason } + | FeatureState::Stabilized { reason } = state + { + feature_removed(span_handler, mi.span(), *reason); + continue; + } } - if let Some((_, since, ..)) = ACCEPTED_FEATURES.iter().find(|f| name == f.0) { + if let Some(Feature { since, .. }) = ACCEPTED_FEATURES.iter().find(|f| name == f.name) { let since = Some(Symbol::intern(since)); features.declared_lang_features.push((name, mi.span(), since)); continue; @@ -851,8 +847,8 @@ pub fn get_features(span_handler: &Handler, krate_attrs: &[ast::Attribute], } } - if let Some((.., set)) = ACTIVE_FEATURES.iter().find(|f| name == f.0) { - set(&mut features, mi.span()); + if let Some(f) = ACTIVE_FEATURES.iter().find(|f| name == f.name) { + f.set(&mut features, mi.span()); features.declared_lang_features.push((name, mi.span(), None)); continue; } @@ -864,6 +860,17 @@ pub fn get_features(span_handler: &Handler, krate_attrs: &[ast::Attribute], features } +fn active_features_up_to(edition: Edition) -> impl Iterator<Item=&'static Feature> { + ACTIVE_FEATURES.iter() + .filter(move |feature| { + if let Some(feature_edition) = feature.edition { + feature_edition <= edition + } else { + false + } + }) +} + pub fn check_crate(krate: &ast::Crate, sess: &ParseSess, features: &Features, diff --git a/src/libsyntax/feature_gate/mod.rs b/src/libsyntax/feature_gate/mod.rs index 97793bca1f5..1e41667ea41 100644 --- a/src/libsyntax/feature_gate/mod.rs +++ b/src/libsyntax/feature_gate/mod.rs @@ -18,6 +18,39 @@ mod active; mod builtin_attrs; mod check; +use std::fmt; +use crate::{edition::Edition, symbol::Symbol}; +use syntax_pos::Span; + +#[derive(Clone, Copy)] +pub enum State { + Accepted, + Active { set: fn(&mut Features, Span) }, + Removed { reason: Option<&'static str> }, + Stabilized { reason: Option<&'static str> }, +} + +impl fmt::Debug for State { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match self { + State::Accepted { .. } => write!(f, "accepted"), + State::Active { .. } => write!(f, "active"), + State::Removed { .. } => write!(f, "removed"), + State::Stabilized { .. } => write!(f, "stabilized"), + } + } +} + +#[derive(Debug, Clone)] +pub struct Feature { + state: State, + name: Symbol, + since: &'static str, + issue: Option<u32>, + edition: Option<Edition>, + description: &'static str, +} + pub use active::{Features, INCOMPLETE_FEATURES}; pub use builtin_attrs::{ AttributeGate, AttributeType, GatedCfg, diff --git a/src/libsyntax/feature_gate/removed.rs b/src/libsyntax/feature_gate/removed.rs index 6ebfeb29f67..ad7d69b3e73 100644 --- a/src/libsyntax/feature_gate/removed.rs +++ b/src/libsyntax/feature_gate/removed.rs @@ -1,19 +1,42 @@ //! List of the removed feature gates. -use crate::symbol::{Symbol, sym}; +use crate::symbol::sym; +use super::{State, Feature}; macro_rules! declare_features { - ($((removed, $feature: ident, $ver: expr, $issue: expr, None, $reason: expr),)+) => { + ($( + $(#[doc = $doc:tt])* (removed, $feature:ident, $ver:expr, $issue:expr, None, $reason:expr), + )+) => { /// Represents unstable features which have since been removed (it was once Active) - pub const REMOVED_FEATURES: &[(Symbol, &str, Option<u32>, Option<&str>)] = &[ - $((sym::$feature, $ver, $issue, $reason)),+ + pub const REMOVED_FEATURES: &[Feature] = &[ + $( + Feature { + state: State::Removed { reason: $reason }, + name: sym::$feature, + since: $ver, + issue: $issue, + edition: None, + description: concat!($($doc,)*), + } + ),+ ]; }; - ($((stable_removed, $feature: ident, $ver: expr, $issue: expr, None),)+) => { + ($( + $(#[doc = $doc:tt])* (stable_removed, $feature:ident, $ver:expr, $issue:expr, None), + )+) => { /// Represents stable features which have since been removed (it was once Accepted) - pub const STABLE_REMOVED_FEATURES: &[(Symbol, &str, Option<u32>, Option<&str>)] = &[ - $((sym::$feature, $ver, $issue, None)),+ + pub const STABLE_REMOVED_FEATURES: &[Feature] = &[ + $( + Feature { + state: State::Stabilized { reason: None }, + name: sym::$feature, + since: $ver, + issue: $issue, + edition: None, + description: concat!($($doc,)*), + } + ),+ ]; }; } @@ -25,17 +48,17 @@ declare_features! ( (removed, import_shadowing, "1.0.0", None, None, None), (removed, managed_boxes, "1.0.0", None, None, None), - // Allows use of unary negate on unsigned integers, e.g., -e for e: u8 + /// Allows use of unary negate on unsigned integers, e.g., -e for e: u8 (removed, negate_unsigned, "1.0.0", Some(29645), None, None), (removed, reflect, "1.0.0", Some(27749), None, None), - // A way to temporarily opt out of opt in copy. This will *never* be accepted. + /// A way to temporarily opt out of opt in copy. This will *never* be accepted. (removed, opt_out_copy, "1.0.0", None, None, None), (removed, quad_precision_float, "1.0.0", None, None, None), (removed, struct_inherit, "1.0.0", None, None, None), (removed, test_removed_feature, "1.0.0", None, None, None), (removed, visible_private_types, "1.0.0", None, None, None), (removed, unsafe_no_drop_flag, "1.0.0", None, None, None), - // Allows using items which are missing stability attributes + /// Allows using items which are missing stability attributes (removed, unmarked_api, "1.0.0", None, None, None), (removed, allocator, "1.0.0", None, None, None), (removed, simd, "1.0.0", Some(27731), None, @@ -57,18 +80,18 @@ declare_features! ( Some("subsumed by `#![feature(proc_macro_hygiene)]`")), (removed, panic_implementation, "1.28.0", Some(44489), None, Some("subsumed by `#[panic_handler]`")), - // Allows the use of `#[derive(Anything)]` as sugar for `#[derive_Anything]`. + /// Allows the use of `#[derive(Anything)]` as sugar for `#[derive_Anything]`. (removed, custom_derive, "1.32.0", Some(29644), None, Some("subsumed by `#[proc_macro_derive]`")), - // Paths of the form: `extern::foo::bar` + /// Paths of the form: `extern::foo::bar` (removed, extern_in_paths, "1.33.0", Some(55600), None, Some("subsumed by `::foo::bar` paths")), (removed, quote, "1.33.0", Some(29601), None, None), - // Allows using `#[unsafe_destructor_blind_to_params]` (RFC 1238). + /// Allows using `#[unsafe_destructor_blind_to_params]` (RFC 1238). (removed, dropck_parametricity, "1.38.0", Some(28498), None, None), (removed, await_macro, "1.38.0", Some(50547), None, Some("subsumed by `.await` syntax")), - // Allows defining `existential type`s. + /// Allows defining `existential type`s. (removed, existential_type, "1.38.0", Some(63063), None, Some("removed in favor of `#![feature(type_alias_impl_trait)]`")), diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs index 89725d8b339..25ad2d4404c 100644 --- a/src/libsyntax/parse/parser.rs +++ b/src/libsyntax/parse/parser.rs @@ -971,15 +971,12 @@ impl<'a> Parser<'a> { /// Skips unexpected attributes and doc comments in this position and emits an appropriate /// error. /// This version of parse arg doesn't necessarily require identifier names. - fn parse_arg_general<F>( + fn parse_arg_general( &mut self, is_trait_item: bool, allow_c_variadic: bool, - is_name_required: F, - ) -> PResult<'a, Arg> - where - F: Fn(&token::Token) -> bool - { + is_name_required: impl Fn(&token::Token) -> bool, + ) -> PResult<'a, Arg> { let lo = self.token.span; let attrs = self.parse_arg_attributes()?; if let Some(mut arg) = self.parse_self_arg()? { @@ -991,7 +988,7 @@ impl<'a> Parser<'a> { let (pat, ty) = if is_name_required || self.is_named_argument() { debug!("parse_arg_general parse_pat (is_name_required:{})", is_name_required); - let pat = self.parse_pat(Some("argument name"))?; + let pat = self.parse_fn_param_pat()?; if let Err(mut err) = self.expect(&token::Colon) { if let Some(ident) = self.argument_without_type( &mut err, diff --git a/src/libsyntax/parse/parser/expr.rs b/src/libsyntax/parse/parser/expr.rs index 5da9b75d53b..f7c090b5135 100644 --- a/src/libsyntax/parse/parser/expr.rs +++ b/src/libsyntax/parse/parser/expr.rs @@ -1,6 +1,7 @@ use super::{Parser, PResult, Restrictions, PrevTokenKind, TokenType, PathStyle}; use super::{BlockMode, SemiColonMode}; use super::{SeqSep, TokenExpectType}; +use super::pat::{GateOr, PARAM_EXPECTED}; use crate::maybe_recover_from_interpolated_ty_qpath; use crate::ptr::P; @@ -1175,7 +1176,7 @@ impl<'a> Parser<'a> { fn parse_fn_block_arg(&mut self) -> PResult<'a, Arg> { let lo = self.token.span; let attrs = self.parse_arg_attributes()?; - let pat = self.parse_pat(Some("argument name"))?; + let pat = self.parse_pat(PARAM_EXPECTED)?; let t = if self.eat(&token::Colon) { self.parse_ty()? } else { @@ -1241,11 +1242,12 @@ impl<'a> Parser<'a> { Ok(cond) } - /// Parses a `let $pats = $expr` pseudo-expression. + /// Parses a `let $pat = $expr` pseudo-expression. /// The `let` token has already been eaten. fn parse_let_expr(&mut self, attrs: ThinVec<Attribute>) -> PResult<'a, P<Expr>> { let lo = self.prev_span; - let pats = self.parse_pats()?; + // FIXME(or_patterns, Centril | dlrobertson): use `parse_top_pat` instead. + let pat = self.parse_top_pat_unpack(GateOr::No)?; self.expect(&token::Eq)?; let expr = self.with_res( Restrictions::NO_STRUCT_LITERAL, @@ -1253,7 +1255,7 @@ impl<'a> Parser<'a> { )?; let span = lo.to(expr.span); self.sess.gated_spans.let_chains.borrow_mut().push(span); - Ok(self.mk_expr(span, ExprKind::Let(pats, expr), attrs)) + Ok(self.mk_expr(span, ExprKind::Let(pat, expr), attrs)) } /// `else` token already eaten @@ -1283,7 +1285,7 @@ impl<'a> Parser<'a> { _ => None, }; - let pat = self.parse_top_level_pat()?; + let pat = self.parse_top_pat(GateOr::Yes)?; if !self.eat_keyword(kw::In) { let in_span = self.prev_span.between(self.token.span); self.struct_span_err(in_span, "missing `in` in `for` loop") @@ -1387,7 +1389,8 @@ impl<'a> Parser<'a> { crate fn parse_arm(&mut self) -> PResult<'a, Arm> { let attrs = self.parse_outer_attributes()?; let lo = self.token.span; - let pats = self.parse_pats()?; + // FIXME(or_patterns, Centril | dlrobertson): use `parse_top_pat` instead. + let pat = self.parse_top_pat_unpack(GateOr::No)?; let guard = if self.eat_keyword(kw::If) { Some(self.parse_expr()?) } else { @@ -1448,7 +1451,7 @@ impl<'a> Parser<'a> { Ok(ast::Arm { attrs, - pats, + pats: pat, // FIXME(or_patterns, Centril | dlrobertson): this should just be `pat,`. guard, body: expr, span: lo.to(hi), diff --git a/src/libsyntax/parse/parser/pat.rs b/src/libsyntax/parse/parser/pat.rs index 8cfa6abbe62..78c9a289b37 100644 --- a/src/libsyntax/parse/parser/pat.rs +++ b/src/libsyntax/parse/parser/pat.rs @@ -12,80 +12,184 @@ use crate::ThinVec; use errors::{Applicability, DiagnosticBuilder}; +type Expected = Option<&'static str>; + +/// `Expected` for function and lambda parameter patterns. +pub(super) const PARAM_EXPECTED: Expected = Some("parameter name"); + +/// Whether or not an or-pattern should be gated when occurring in the current context. +#[derive(PartialEq)] +pub enum GateOr { Yes, No } + +/// Whether or not to recover a `,` when parsing or-patterns. +#[derive(PartialEq, Copy, Clone)] +enum RecoverComma { Yes, No } + impl<'a> Parser<'a> { /// Parses a pattern. - pub fn parse_pat( + /// + /// Corresponds to `pat<no_top_alt>` in RFC 2535 and does not admit or-patterns + /// at the top level. Used when parsing the parameters of lambda expressions, + /// functions, function pointers, and `pat` macro fragments. + pub fn parse_pat(&mut self, expected: Expected) -> PResult<'a, P<Pat>> { + self.parse_pat_with_range_pat(true, expected) + } + + // FIXME(or_patterns, Centril | dlrobertson): + // remove this and use `parse_top_pat` everywhere it is used instead. + pub(super) fn parse_top_pat_unpack(&mut self, gate_or: GateOr) -> PResult<'a, Vec<P<Pat>>> { + self.parse_top_pat(gate_or) + .map(|pat| pat.and_then(|pat| match pat.node { + PatKind::Or(pats) => pats, + node => vec![self.mk_pat(pat.span, node)], + })) + } + + /// Entry point to the main pattern parser. + /// Corresponds to `top_pat` in RFC 2535 and allows or-pattern at the top level. + pub(super) fn parse_top_pat(&mut self, gate_or: GateOr) -> PResult<'a, P<Pat>> { + // Allow a '|' before the pats (RFCs 1925, 2530, and 2535). + let gated_leading_vert = self.eat_or_separator() && gate_or == GateOr::Yes; + let leading_vert_span = self.prev_span; + + // Parse the possibly-or-pattern. + let pat = self.parse_pat_with_or(None, gate_or, RecoverComma::Yes)?; + + // If we parsed a leading `|` which should be gated, + // and no other gated or-pattern has been parsed thus far, + // then we should really gate the leading `|`. + // This complicated procedure is done purely for diagnostics UX. + if gated_leading_vert { + let mut or_pattern_spans = self.sess.gated_spans.or_patterns.borrow_mut(); + if or_pattern_spans.is_empty() { + or_pattern_spans.push(leading_vert_span); + } + } + + Ok(pat) + } + + /// Parse the pattern for a function or function pointer parameter. + /// Special recovery is provided for or-patterns and leading `|`. + pub(super) fn parse_fn_param_pat(&mut self) -> PResult<'a, P<Pat>> { + self.recover_leading_vert("not allowed in a parameter pattern"); + let pat = self.parse_pat_with_or(PARAM_EXPECTED, GateOr::No, RecoverComma::No)?; + + if let PatKind::Or(..) = &pat.node { + self.ban_illegal_fn_param_or_pat(&pat); + } + + Ok(pat) + } + + /// Ban `A | B` immediately in a parameter pattern and suggest wrapping in parens. + fn ban_illegal_fn_param_or_pat(&self, pat: &Pat) { + let msg = "wrap the pattern in parenthesis"; + let fix = format!("({})", pprust::pat_to_string(pat)); + self.struct_span_err(pat.span, "an or-pattern parameter must be wrapped in parenthesis") + .span_suggestion(pat.span, msg, fix, Applicability::MachineApplicable) + .emit(); + } + + /// Parses a pattern, that may be a or-pattern (e.g. `Foo | Bar` in `Some(Foo | Bar)`). + /// Corresponds to `pat<allow_top_alt>` in RFC 2535. + fn parse_pat_with_or( &mut self, - expected: Option<&'static str> + expected: Expected, + gate_or: GateOr, + rc: RecoverComma, ) -> PResult<'a, P<Pat>> { - self.parse_pat_with_range_pat(true, expected) + // Parse the first pattern. + let first_pat = self.parse_pat(expected)?; + self.maybe_recover_unexpected_comma(first_pat.span, rc)?; + + // If the next token is not a `|`, + // this is not an or-pattern and we should exit here. + if !self.check(&token::BinOp(token::Or)) && self.token != token::OrOr { + return Ok(first_pat) + } + + let lo = first_pat.span; + let mut pats = vec![first_pat]; + while self.eat_or_separator() { + let pat = self.parse_pat(expected).map_err(|mut err| { + err.span_label(lo, "while parsing this or-pattern staring here"); + err + })?; + self.maybe_recover_unexpected_comma(pat.span, rc)?; + pats.push(pat); + } + let or_pattern_span = lo.to(self.prev_span); + + // Feature gate the or-pattern if instructed: + if gate_or == GateOr::Yes { + self.sess.gated_spans.or_patterns.borrow_mut().push(or_pattern_span); + } + + Ok(self.mk_pat(or_pattern_span, PatKind::Or(pats))) } - /// Parses patterns, separated by '|' s. - pub(super) fn parse_pats(&mut self) -> PResult<'a, Vec<P<Pat>>> { - // Allow a '|' before the pats (RFC 1925 + RFC 2530) - self.eat(&token::BinOp(token::Or)); - - let mut pats = Vec::new(); - loop { - pats.push(self.parse_top_level_pat()?); - - if self.token == token::OrOr { - self.struct_span_err(self.token.span, "unexpected token `||` after pattern") - .span_suggestion( - self.token.span, - "use a single `|` to specify multiple patterns", - "|".to_owned(), - Applicability::MachineApplicable - ) - .emit(); + /// Eat the or-pattern `|` separator. + /// If instead a `||` token is encountered, recover and pretend we parsed `|`. + fn eat_or_separator(&mut self) -> bool { + match self.token.kind { + token::OrOr => { + // Found `||`; Recover and pretend we parsed `|`. + self.ban_unexpected_or_or(); self.bump(); - } else if self.eat(&token::BinOp(token::Or)) { - // This is a No-op. Continue the loop to parse the next - // pattern. - } else { - return Ok(pats); + true } - }; + _ => self.eat(&token::BinOp(token::Or)), + } } - /// A wrapper around `parse_pat` with some special error handling for the - /// "top-level" patterns in a match arm, `for` loop, `let`, &c. (in contrast - /// to subpatterns within such). - pub(super) fn parse_top_level_pat(&mut self) -> PResult<'a, P<Pat>> { - let pat = self.parse_pat(None)?; - if self.token == token::Comma { - // An unexpected comma after a top-level pattern is a clue that the - // user (perhaps more accustomed to some other language) forgot the - // parentheses in what should have been a tuple pattern; return a - // suggestion-enhanced error here rather than choking on the comma - // later. - let comma_span = self.token.span; - self.bump(); - if let Err(mut err) = self.skip_pat_list() { - // We didn't expect this to work anyway; we just wanted - // to advance to the end of the comma-sequence so we know - // the span to suggest parenthesizing - err.cancel(); - } - let seq_span = pat.span.to(self.prev_span); - let mut err = self.struct_span_err(comma_span, "unexpected `,` in pattern"); - if let Ok(seq_snippet) = self.span_to_snippet(seq_span) { - err.span_suggestion( - seq_span, - "try adding parentheses to match on a tuple..", - format!("({})", seq_snippet), - Applicability::MachineApplicable - ).span_suggestion( - seq_span, - "..or a vertical bar to match on multiple alternatives", - format!("{}", seq_snippet.replace(",", " |")), - Applicability::MachineApplicable - ); - } - return Err(err); + /// We have parsed `||` instead of `|`. Error and suggest `|` instead. + fn ban_unexpected_or_or(&mut self) { + self.struct_span_err(self.token.span, "unexpected token `||` after pattern") + .span_suggestion( + self.token.span, + "use a single `|` to separate multiple alternative patterns", + "|".to_owned(), + Applicability::MachineApplicable + ) + .emit(); + } + + /// Some special error handling for the "top-level" patterns in a match arm, + /// `for` loop, `let`, &c. (in contrast to subpatterns within such). + fn maybe_recover_unexpected_comma(&mut self, lo: Span, rc: RecoverComma) -> PResult<'a, ()> { + if rc == RecoverComma::No || self.token != token::Comma { + return Ok(()); } - Ok(pat) + + // An unexpected comma after a top-level pattern is a clue that the + // user (perhaps more accustomed to some other language) forgot the + // parentheses in what should have been a tuple pattern; return a + // suggestion-enhanced error here rather than choking on the comma later. + let comma_span = self.token.span; + self.bump(); + if let Err(mut err) = self.skip_pat_list() { + // We didn't expect this to work anyway; we just wanted to advance to the + // end of the comma-sequence so we know the span to suggest parenthesizing. + err.cancel(); + } + let seq_span = lo.to(self.prev_span); + let mut err = self.struct_span_err(comma_span, "unexpected `,` in pattern"); + if let Ok(seq_snippet) = self.span_to_snippet(seq_span) { + err.span_suggestion( + seq_span, + "try adding parentheses to match on a tuple..", + format!("({})", seq_snippet), + Applicability::MachineApplicable + ) + .span_suggestion( + seq_span, + "..or a vertical bar to match on multiple alternatives", + format!("{}", seq_snippet.replace(",", " |")), + Applicability::MachineApplicable + ); + } + Err(err) } /// Parse and throw away a parentesized comma separated @@ -100,32 +204,26 @@ impl<'a> Parser<'a> { Ok(()) } - /// Parses a pattern, that may be a or-pattern (e.g. `Some(Foo | Bar)`). - fn parse_pat_with_or(&mut self, expected: Option<&'static str>) -> PResult<'a, P<Pat>> { - // Parse the first pattern. - let first_pat = self.parse_pat(expected)?; - - // If the next token is not a `|`, this is not an or-pattern and - // we should exit here. - if !self.check(&token::BinOp(token::Or)) { - return Ok(first_pat) - } + /// Recursive possibly-or-pattern parser with recovery for an erroneous leading `|`. + /// See `parse_pat_with_or` for details on parsing or-patterns. + fn parse_pat_with_or_inner(&mut self) -> PResult<'a, P<Pat>> { + self.recover_leading_vert("only allowed in a top-level pattern"); + self.parse_pat_with_or(None, GateOr::Yes, RecoverComma::No) + } - let lo = first_pat.span; + /// Recover if `|` or `||` is here. + /// The user is thinking that a leading `|` is allowed in this position. + fn recover_leading_vert(&mut self, ctx: &str) { + if let token::BinOp(token::Or) | token::OrOr = self.token.kind { + let span = self.token.span; + let rm_msg = format!("remove the `{}`", pprust::token_to_string(&self.token)); - let mut pats = vec![first_pat]; + self.struct_span_err(span, &format!("a leading `|` is {}", ctx)) + .span_suggestion(span, &rm_msg, String::new(), Applicability::MachineApplicable) + .emit(); - while self.eat(&token::BinOp(token::Or)) { - pats.push(self.parse_pat_with_range_pat( - true, expected - )?); + self.bump(); } - - let or_pattern_span = lo.to(self.prev_span); - - self.sess.gated_spans.or_patterns.borrow_mut().push(or_pattern_span); - - Ok(self.mk_pat(or_pattern_span, PatKind::Or(pats))) } /// Parses a pattern, with a setting whether modern range patterns (e.g., `a..=b`, `a..b` are @@ -133,7 +231,7 @@ impl<'a> Parser<'a> { fn parse_pat_with_range_pat( &mut self, allow_range_pat: bool, - expected: Option<&'static str>, + expected: Expected, ) -> PResult<'a, P<Pat>> { maybe_recover_from_interpolated_ty_qpath!(self, true); maybe_whole!(self, NtPat, |x| x); @@ -144,7 +242,11 @@ impl<'a> Parser<'a> { token::OpenDelim(token::Paren) => self.parse_pat_tuple_or_parens()?, token::OpenDelim(token::Bracket) => { // Parse `[pat, pat,...]` as a slice pattern. - PatKind::Slice(self.parse_delim_comma_seq(token::Bracket, |p| p.parse_pat(None))?.0) + let (pats, _) = self.parse_delim_comma_seq( + token::Bracket, + |p| p.parse_pat_with_or_inner(), + )?; + PatKind::Slice(pats) } token::DotDot => { self.bump(); @@ -255,7 +357,7 @@ impl<'a> Parser<'a> { } /// Parse `&pat` / `&mut pat`. - fn parse_pat_deref(&mut self, expected: Option<&'static str>) -> PResult<'a, PatKind> { + fn parse_pat_deref(&mut self, expected: Expected) -> PResult<'a, PatKind> { self.expect_and()?; let mutbl = self.parse_mutability(); @@ -271,9 +373,7 @@ impl<'a> Parser<'a> { /// Parse a tuple or parenthesis pattern. fn parse_pat_tuple_or_parens(&mut self) -> PResult<'a, PatKind> { - let (fields, trailing_comma) = self.parse_paren_comma_seq(|p| { - p.parse_pat_with_or(None) - })?; + let (fields, trailing_comma) = self.parse_paren_comma_seq(|p| p.parse_pat_with_or_inner())?; // Here, `(pat,)` is a tuple pattern. // For backward compatibility, `(..)` is a tuple pattern as well. @@ -361,7 +461,7 @@ impl<'a> Parser<'a> { fn fatal_unexpected_non_pat( &mut self, mut err: DiagnosticBuilder<'a>, - expected: Option<&'static str>, + expected: Expected, ) -> PResult<'a, P<Pat>> { self.cancel(&mut err); @@ -516,7 +616,7 @@ impl<'a> Parser<'a> { err.span_label(self.token.span, msg); return Err(err); } - let (fields, _) = self.parse_paren_comma_seq(|p| p.parse_pat_with_or(None))?; + let (fields, _) = self.parse_paren_comma_seq(|p| p.parse_pat_with_or_inner())?; Ok(PatKind::TupleStruct(path, fields)) } @@ -660,7 +760,7 @@ impl<'a> Parser<'a> { // Parsing a pattern of the form "fieldname: pat" let fieldname = self.parse_field_name()?; self.bump(); - let pat = self.parse_pat_with_or(None)?; + let pat = self.parse_pat_with_or_inner()?; hi = pat.span; (pat, fieldname, false) } else { diff --git a/src/libsyntax/parse/parser/stmt.rs b/src/libsyntax/parse/parser/stmt.rs index c911caba4cd..651ebf6342e 100644 --- a/src/libsyntax/parse/parser/stmt.rs +++ b/src/libsyntax/parse/parser/stmt.rs @@ -1,6 +1,7 @@ use super::{Parser, PResult, Restrictions, PrevTokenKind, SemiColonMode, BlockMode}; use super::expr::LhsExpr; use super::path::PathStyle; +use super::pat::GateOr; use crate::ptr::P; use crate::{maybe_whole, ThinVec}; @@ -207,7 +208,7 @@ impl<'a> Parser<'a> { /// Parses a local variable declaration. fn parse_local(&mut self, attrs: ThinVec<Attribute>) -> PResult<'a, P<Local>> { let lo = self.prev_span; - let pat = self.parse_top_level_pat()?; + let pat = self.parse_top_pat(GateOr::Yes)?; let (err, ty) = if self.eat(&token::Colon) { // Save the state of the parser before parsing type normally, in case there is a `:` diff --git a/src/test/codegen/README.md b/src/test/codegen/README.md new file mode 100644 index 00000000000..00de55eeab1 --- /dev/null +++ b/src/test/codegen/README.md @@ -0,0 +1,2 @@ +The files here use the LLVM FileCheck framework, documented at +<https://llvm.org/docs/CommandGuide/FileCheck.html>. diff --git a/src/test/ui/anon-params-denied-2018.rs b/src/test/ui/anon-params-denied-2018.rs index abff8275064..5721f5d2357 100644 --- a/src/test/ui/anon-params-denied-2018.rs +++ b/src/test/ui/anon-params-denied-2018.rs @@ -3,7 +3,7 @@ // edition:2018 trait T { - fn foo(i32); //~ expected one of `:` or `@`, found `)` + fn foo(i32); //~ expected one of `:`, `@`, or `|`, found `)` fn bar_with_default_impl(String, String) {} //~^ ERROR expected one of `:` diff --git a/src/test/ui/anon-params-denied-2018.stderr b/src/test/ui/anon-params-denied-2018.stderr index 438bcf4274d..a58998e4891 100644 --- a/src/test/ui/anon-params-denied-2018.stderr +++ b/src/test/ui/anon-params-denied-2018.stderr @@ -1,8 +1,8 @@ -error: expected one of `:` or `@`, found `)` +error: expected one of `:`, `@`, or `|`, found `)` --> $DIR/anon-params-denied-2018.rs:6:15 | LL | fn foo(i32); - | ^ expected one of `:` or `@` here + | ^ expected one of `:`, `@`, or `|` here | = note: anonymous parameters are removed in the 2018 edition (see RFC 1685) help: if this was a parameter name, give it a type @@ -14,11 +14,11 @@ help: if this is a type, explicitly ignore the parameter name LL | fn foo(_: i32); | ^^^^^^ -error: expected one of `:` or `@`, found `,` +error: expected one of `:`, `@`, or `|`, found `,` --> $DIR/anon-params-denied-2018.rs:8:36 | LL | fn bar_with_default_impl(String, String) {} - | ^ expected one of `:` or `@` here + | ^ expected one of `:`, `@`, or `|` here | = note: anonymous parameters are removed in the 2018 edition (see RFC 1685) help: if this was a parameter name, give it a type @@ -30,11 +30,11 @@ help: if this is a type, explicitly ignore the parameter name LL | fn bar_with_default_impl(_: String, String) {} | ^^^^^^^^^ -error: expected one of `:` or `@`, found `)` +error: expected one of `:`, `@`, or `|`, found `)` --> $DIR/anon-params-denied-2018.rs:8:44 | LL | fn bar_with_default_impl(String, String) {} - | ^ expected one of `:` or `@` here + | ^ expected one of `:`, `@`, or `|` here | = note: anonymous parameters are removed in the 2018 edition (see RFC 1685) help: if this was a parameter name, give it a type @@ -46,11 +46,11 @@ help: if this is a type, explicitly ignore the parameter name LL | fn bar_with_default_impl(String, _: String) {} | ^^^^^^^^^ -error: expected one of `:` or `@`, found `,` +error: expected one of `:`, `@`, or `|`, found `,` --> $DIR/anon-params-denied-2018.rs:13:22 | LL | fn baz(a:usize, b, c: usize) -> usize { - | ^ expected one of `:` or `@` here + | ^ expected one of `:`, `@`, or `|` here | = note: anonymous parameters are removed in the 2018 edition (see RFC 1685) help: if this was a parameter name, give it a type diff --git a/src/test/ui/derive-uninhabited-enum-38885.rs b/src/test/ui/derive-uninhabited-enum-38885.rs index 2c4d64e4e60..010464adf5b 100644 --- a/src/test/ui/derive-uninhabited-enum-38885.rs +++ b/src/test/ui/derive-uninhabited-enum-38885.rs @@ -5,12 +5,15 @@ // when deriving Debug on an empty enum #[derive(Debug)] -enum Void {} //~ WARN never used +enum Void {} #[derive(Debug)] -enum Foo { //~ WARN never used +enum Foo { Bar(u8), - Void(Void), + Void(Void), //~ WARN never used } -fn main() {} +fn main() { + let x = Foo::Bar(42); + println!("{:?}", x); +} diff --git a/src/test/ui/derive-uninhabited-enum-38885.stderr b/src/test/ui/derive-uninhabited-enum-38885.stderr index 941c98b5506..a3ed6798a70 100644 --- a/src/test/ui/derive-uninhabited-enum-38885.stderr +++ b/src/test/ui/derive-uninhabited-enum-38885.stderr @@ -1,14 +1,8 @@ -warning: enum is never used: `Void` - --> $DIR/derive-uninhabited-enum-38885.rs:8:1 +warning: variant is never constructed: `Void` + --> $DIR/derive-uninhabited-enum-38885.rs:13:5 | -LL | enum Void {} - | ^^^^^^^^^ +LL | Void(Void), + | ^^^^^^^^^^ | = note: `-W dead-code` implied by `-W unused` -warning: enum is never used: `Foo` - --> $DIR/derive-uninhabited-enum-38885.rs:11:1 - | -LL | enum Foo { - | ^^^^^^^^ - diff --git a/src/test/ui/did_you_mean/multiple-pattern-typo.rs b/src/test/ui/did_you_mean/multiple-pattern-typo.rs deleted file mode 100644 index 14ad33d53b0..00000000000 --- a/src/test/ui/did_you_mean/multiple-pattern-typo.rs +++ /dev/null @@ -1,7 +0,0 @@ -fn main() { - let x = 3; - match x { - 1 | 2 || 3 => (), //~ ERROR unexpected token `||` after pattern - _ => (), - } -} diff --git a/src/test/ui/did_you_mean/multiple-pattern-typo.stderr b/src/test/ui/did_you_mean/multiple-pattern-typo.stderr deleted file mode 100644 index a29fa584b29..00000000000 --- a/src/test/ui/did_you_mean/multiple-pattern-typo.stderr +++ /dev/null @@ -1,8 +0,0 @@ -error: unexpected token `||` after pattern - --> $DIR/multiple-pattern-typo.rs:4:15 - | -LL | 1 | 2 || 3 => (), - | ^^ help: use a single `|` to specify multiple patterns: `|` - -error: aborting due to previous error - diff --git a/src/test/ui/feature-gate/feature-gate-or_patterns.rs b/src/test/ui/feature-gate/feature-gate-or_patterns.rs deleted file mode 100644 index 036a6095965..00000000000 --- a/src/test/ui/feature-gate/feature-gate-or_patterns.rs +++ /dev/null @@ -1,9 +0,0 @@ -#![crate_type="lib"] - -pub fn example(x: Option<usize>) { - match x { - Some(0 | 1 | 2) => {} - //~^ ERROR: or-patterns syntax is experimental - _ => {} - } -} diff --git a/src/test/ui/lint/lint-dead-code-const-and-self.rs b/src/test/ui/lint/lint-dead-code-const-and-self.rs new file mode 100644 index 00000000000..1a7b3f43cda --- /dev/null +++ b/src/test/ui/lint/lint-dead-code-const-and-self.rs @@ -0,0 +1,35 @@ +// check-pass + +#![deny(dead_code)] + +const TLC: usize = 4; + +trait Tr { fn doit(&self); } + +impl Tr for [usize; TLC] { + fn doit(&self) { + println!("called 4"); + } +} + +struct X; +struct Y; +struct Z; + +trait Foo<T> { + type Ty; + fn foo() -> Self::Ty; +} + +impl Foo<Y> for X { + type Ty = Z; + fn foo() -> Self::Ty { + unimplemented!() + } +} + +fn main() { + let s = [0,1,2,3]; + s.doit(); + X::foo(); +} diff --git a/src/test/ui/lint/lint-dead-code-empty-unused-enum-pub.rs b/src/test/ui/lint/lint-dead-code-empty-unused-enum-pub.rs new file mode 100644 index 00000000000..15b04496ba7 --- /dev/null +++ b/src/test/ui/lint/lint-dead-code-empty-unused-enum-pub.rs @@ -0,0 +1,6 @@ +// build-pass +#![deny(unused)] + +pub enum E {} + +fn main() {} diff --git a/src/test/ui/lint/lint-dead-code-empty-unused-enum.rs b/src/test/ui/lint/lint-dead-code-empty-unused-enum.rs new file mode 100644 index 00000000000..834681d77e6 --- /dev/null +++ b/src/test/ui/lint/lint-dead-code-empty-unused-enum.rs @@ -0,0 +1,5 @@ +#![deny(unused)] + +enum E {} //~ ERROR enum is never used + +fn main() {} diff --git a/src/test/ui/lint/lint-dead-code-empty-unused-enum.stderr b/src/test/ui/lint/lint-dead-code-empty-unused-enum.stderr new file mode 100644 index 00000000000..4e3bebfc48b --- /dev/null +++ b/src/test/ui/lint/lint-dead-code-empty-unused-enum.stderr @@ -0,0 +1,15 @@ +error: enum is never used: `E` + --> $DIR/lint-dead-code-empty-unused-enum.rs:3:1 + | +LL | enum E {} + | ^^^^^^ + | +note: lint level defined here + --> $DIR/lint-dead-code-empty-unused-enum.rs:1:9 + | +LL | #![deny(unused)] + | ^^^^^^ + = note: `#[deny(dead_code)]` implied by `#[deny(unused)]` + +error: aborting due to previous error + diff --git a/src/test/ui/lint/lint-dead-code-unused-enum.rs b/src/test/ui/lint/lint-dead-code-unused-enum.rs new file mode 100644 index 00000000000..e57fac259c5 --- /dev/null +++ b/src/test/ui/lint/lint-dead-code-unused-enum.rs @@ -0,0 +1,11 @@ +#![deny(unused)] + +struct F; //~ ERROR struct is never constructed +struct B; //~ ERROR struct is never constructed + +enum E { //~ ERROR enum is never used + Foo(F), + Bar(B), +} + +fn main() {} diff --git a/src/test/ui/lint/lint-dead-code-unused-enum.stderr b/src/test/ui/lint/lint-dead-code-unused-enum.stderr new file mode 100644 index 00000000000..ea711e7b05e --- /dev/null +++ b/src/test/ui/lint/lint-dead-code-unused-enum.stderr @@ -0,0 +1,27 @@ +error: struct is never constructed: `F` + --> $DIR/lint-dead-code-unused-enum.rs:3:1 + | +LL | struct F; + | ^^^^^^^^^ + | +note: lint level defined here + --> $DIR/lint-dead-code-unused-enum.rs:1:9 + | +LL | #![deny(unused)] + | ^^^^^^ + = note: `#[deny(dead_code)]` implied by `#[deny(unused)]` + +error: struct is never constructed: `B` + --> $DIR/lint-dead-code-unused-enum.rs:4:1 + | +LL | struct B; + | ^^^^^^^^^ + +error: enum is never used: `E` + --> $DIR/lint-dead-code-unused-enum.rs:6:1 + | +LL | enum E { + | ^^^^^^ + +error: aborting due to 3 previous errors + diff --git a/src/test/ui/lint/lint-dead-code-unused-variant-pub.rs b/src/test/ui/lint/lint-dead-code-unused-variant-pub.rs new file mode 100644 index 00000000000..3a9061340eb --- /dev/null +++ b/src/test/ui/lint/lint-dead-code-unused-variant-pub.rs @@ -0,0 +1,14 @@ +// build-pass +#![deny(unused)] + +pub struct F; +pub struct B; + +pub enum E { + Foo(F), + Bar(B), +} + +fn main() { + let _ = E::Foo(F); +} diff --git a/src/test/ui/lint/lint-dead-code-unused-variant.rs b/src/test/ui/lint/lint-dead-code-unused-variant.rs new file mode 100644 index 00000000000..69ab29042e5 --- /dev/null +++ b/src/test/ui/lint/lint-dead-code-unused-variant.rs @@ -0,0 +1,13 @@ +#![deny(unused)] + +struct F; +struct B; + +enum E { + Foo(F), + Bar(B), //~ ERROR variant is never constructed +} + +fn main() { + let _ = E::Foo(F); +} diff --git a/src/test/ui/lint/lint-dead-code-unused-variant.stderr b/src/test/ui/lint/lint-dead-code-unused-variant.stderr new file mode 100644 index 00000000000..919996ec300 --- /dev/null +++ b/src/test/ui/lint/lint-dead-code-unused-variant.stderr @@ -0,0 +1,15 @@ +error: variant is never constructed: `Bar` + --> $DIR/lint-dead-code-unused-variant.rs:8:5 + | +LL | Bar(B), + | ^^^^^^ + | +note: lint level defined here + --> $DIR/lint-dead-code-unused-variant.rs:1:9 + | +LL | #![deny(unused)] + | ^^^^^^ + = note: `#[deny(dead_code)]` implied by `#[deny(unused)]` + +error: aborting due to previous error + diff --git a/src/test/ui/or-patterns/feature-gate-or_patterns-leading-for.rs b/src/test/ui/or-patterns/feature-gate-or_patterns-leading-for.rs new file mode 100644 index 00000000000..de8e1bba557 --- /dev/null +++ b/src/test/ui/or-patterns/feature-gate-or_patterns-leading-for.rs @@ -0,0 +1,8 @@ +// Test feature gating for a sole leading `|` in `let`. + +fn main() {} + +#[cfg(FALSE)] +fn gated_leading_vert_in_let() { + for | A in 0 {} //~ ERROR or-patterns syntax is experimental +} diff --git a/src/test/ui/feature-gate/feature-gate-or_patterns.stderr b/src/test/ui/or-patterns/feature-gate-or_patterns-leading-for.stderr index aaabb54c1f0..f520409e8ba 100644 --- a/src/test/ui/feature-gate/feature-gate-or_patterns.stderr +++ b/src/test/ui/or-patterns/feature-gate-or_patterns-leading-for.stderr @@ -1,8 +1,8 @@ error[E0658]: or-patterns syntax is experimental - --> $DIR/feature-gate-or_patterns.rs:5:14 + --> $DIR/feature-gate-or_patterns-leading-for.rs:7:9 | -LL | Some(0 | 1 | 2) => {} - | ^^^^^^^^^ +LL | for | A in 0 {} + | ^ | = note: for more information, see https://github.com/rust-lang/rust/issues/54883 = help: add `#![feature(or_patterns)]` to the crate attributes to enable diff --git a/src/test/ui/or-patterns/feature-gate-or_patterns-leading-let.rs b/src/test/ui/or-patterns/feature-gate-or_patterns-leading-let.rs new file mode 100644 index 00000000000..a4ea4e25d86 --- /dev/null +++ b/src/test/ui/or-patterns/feature-gate-or_patterns-leading-let.rs @@ -0,0 +1,8 @@ +// Test feature gating for a sole leading `|` in `let`. + +fn main() {} + +#[cfg(FALSE)] +fn gated_leading_vert_in_let() { + let | A; //~ ERROR or-patterns syntax is experimental +} diff --git a/src/test/ui/or-patterns/feature-gate-or_patterns-leading-let.stderr b/src/test/ui/or-patterns/feature-gate-or_patterns-leading-let.stderr new file mode 100644 index 00000000000..30fd6a1a95e --- /dev/null +++ b/src/test/ui/or-patterns/feature-gate-or_patterns-leading-let.stderr @@ -0,0 +1,12 @@ +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns-leading-let.rs:7:9 + | +LL | let | A; + | ^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0658`. diff --git a/src/test/ui/or-patterns/feature-gate-or_patterns.rs b/src/test/ui/or-patterns/feature-gate-or_patterns.rs new file mode 100644 index 00000000000..e638838147a --- /dev/null +++ b/src/test/ui/or-patterns/feature-gate-or_patterns.rs @@ -0,0 +1,52 @@ +fn main() {} + +pub fn example(x: Option<usize>) { + match x { + Some(0 | 1 | 2) => {} + //~^ ERROR: or-patterns syntax is experimental + _ => {} + } +} + +// Test the `pat` macro fragment parser: +macro_rules! accept_pat { + ($p:pat) => {} +} + +accept_pat!((p | q)); //~ ERROR or-patterns syntax is experimental +accept_pat!((p | q,)); //~ ERROR or-patterns syntax is experimental +accept_pat!(TS(p | q)); //~ ERROR or-patterns syntax is experimental +accept_pat!(NS { f: p | q }); //~ ERROR or-patterns syntax is experimental +accept_pat!([p | q]); //~ ERROR or-patterns syntax is experimental + +// Non-macro tests: + +#[cfg(FALSE)] +fn or_patterns() { + // Gated: + + let | A | B; //~ ERROR or-patterns syntax is experimental + let A | B; //~ ERROR or-patterns syntax is experimental + for | A | B in 0 {} //~ ERROR or-patterns syntax is experimental + for A | B in 0 {} //~ ERROR or-patterns syntax is experimental + fn fun((A | B): _) {} //~ ERROR or-patterns syntax is experimental + let _ = |(A | B): u8| (); //~ ERROR or-patterns syntax is experimental + let (A | B); //~ ERROR or-patterns syntax is experimental + let (A | B,); //~ ERROR or-patterns syntax is experimental + let A(B | C); //~ ERROR or-patterns syntax is experimental + let E::V(B | C); //~ ERROR or-patterns syntax is experimental + let S { f1: B | C, f2 }; //~ ERROR or-patterns syntax is experimental + let E::V { f1: B | C, f2 }; //~ ERROR or-patterns syntax is experimental + let [A | B]; //~ ERROR or-patterns syntax is experimental + + // Top level of `while`, `if`, and `match` arms are allowed: + + while let | A = 0 {} + while let A | B = 0 {} + if let | A = 0 {} + if let A | B = 0 {} + match 0 { + | A => {}, + A | B => {}, + } +} diff --git a/src/test/ui/or-patterns/feature-gate-or_patterns.stderr b/src/test/ui/or-patterns/feature-gate-or_patterns.stderr new file mode 100644 index 00000000000..aae6644dac2 --- /dev/null +++ b/src/test/ui/or-patterns/feature-gate-or_patterns.stderr @@ -0,0 +1,174 @@ +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns.rs:5:14 + | +LL | Some(0 | 1 | 2) => {} + | ^^^^^^^^^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns.rs:28:11 + | +LL | let | A | B; + | ^^^^^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns.rs:29:9 + | +LL | let A | B; + | ^^^^^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns.rs:30:11 + | +LL | for | A | B in 0 {} + | ^^^^^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns.rs:31:9 + | +LL | for A | B in 0 {} + | ^^^^^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns.rs:32:13 + | +LL | fn fun((A | B): _) {} + | ^^^^^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns.rs:33:15 + | +LL | let _ = |(A | B): u8| (); + | ^^^^^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns.rs:34:10 + | +LL | let (A | B); + | ^^^^^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns.rs:35:10 + | +LL | let (A | B,); + | ^^^^^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns.rs:36:11 + | +LL | let A(B | C); + | ^^^^^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns.rs:37:14 + | +LL | let E::V(B | C); + | ^^^^^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns.rs:38:17 + | +LL | let S { f1: B | C, f2 }; + | ^^^^^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns.rs:39:20 + | +LL | let E::V { f1: B | C, f2 }; + | ^^^^^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns.rs:40:10 + | +LL | let [A | B]; + | ^^^^^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns.rs:16:14 + | +LL | accept_pat!((p | q)); + | ^^^^^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns.rs:17:14 + | +LL | accept_pat!((p | q,)); + | ^^^^^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns.rs:18:16 + | +LL | accept_pat!(TS(p | q)); + | ^^^^^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns.rs:19:21 + | +LL | accept_pat!(NS { f: p | q }); + | ^^^^^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error[E0658]: or-patterns syntax is experimental + --> $DIR/feature-gate-or_patterns.rs:20:14 + | +LL | accept_pat!([p | q]); + | ^^^^^ + | + = note: for more information, see https://github.com/rust-lang/rust/issues/54883 + = help: add `#![feature(or_patterns)]` to the crate attributes to enable + +error: aborting due to 19 previous errors + +For more information about this error, try `rustc --explain E0658`. diff --git a/src/test/ui/or-patterns/fn-param-wrap-parens.fixed b/src/test/ui/or-patterns/fn-param-wrap-parens.fixed new file mode 100644 index 00000000000..08730fe8b07 --- /dev/null +++ b/src/test/ui/or-patterns/fn-param-wrap-parens.fixed @@ -0,0 +1,14 @@ +// Test the suggestion to wrap an or-pattern as a function parameter in parens. + +// run-rustfix + +#![feature(or_patterns)] +#![allow(warnings)] + +fn main() {} + +enum E { A, B } +use E::*; + +#[cfg(FALSE)] +fn fun1((A | B): E) {} //~ ERROR an or-pattern parameter must be wrapped in parenthesis diff --git a/src/test/ui/or-patterns/fn-param-wrap-parens.rs b/src/test/ui/or-patterns/fn-param-wrap-parens.rs new file mode 100644 index 00000000000..ed667e0e660 --- /dev/null +++ b/src/test/ui/or-patterns/fn-param-wrap-parens.rs @@ -0,0 +1,14 @@ +// Test the suggestion to wrap an or-pattern as a function parameter in parens. + +// run-rustfix + +#![feature(or_patterns)] +#![allow(warnings)] + +fn main() {} + +enum E { A, B } +use E::*; + +#[cfg(FALSE)] +fn fun1(A | B: E) {} //~ ERROR an or-pattern parameter must be wrapped in parenthesis diff --git a/src/test/ui/or-patterns/fn-param-wrap-parens.stderr b/src/test/ui/or-patterns/fn-param-wrap-parens.stderr new file mode 100644 index 00000000000..2c6e4d9838d --- /dev/null +++ b/src/test/ui/or-patterns/fn-param-wrap-parens.stderr @@ -0,0 +1,8 @@ +error: an or-pattern parameter must be wrapped in parenthesis + --> $DIR/fn-param-wrap-parens.rs:14:9 + | +LL | fn fun1(A | B: E) {} + | ^^^^^ help: wrap the pattern in parenthesis: `(A | B)` + +error: aborting due to previous error + diff --git a/src/test/ui/or-patterns/multiple-pattern-typo.rs b/src/test/ui/or-patterns/multiple-pattern-typo.rs new file mode 100644 index 00000000000..e308c0adb4e --- /dev/null +++ b/src/test/ui/or-patterns/multiple-pattern-typo.rs @@ -0,0 +1,45 @@ +#![feature(or_patterns)] +//~^ WARN the feature `or_patterns` is incomplete and may cause the compiler to crash + +fn main() { + let x = 3; + + match x { + 1 | 2 || 3 => (), //~ ERROR unexpected token `||` after pattern + _ => (), + } + + match x { + (1 | 2 || 3) => (), //~ ERROR unexpected token `||` after pattern + _ => (), + } + + match (x,) { + (1 | 2 || 3,) => (), //~ ERROR unexpected token `||` after pattern + _ => (), + } + + struct TS(u8); + + match TS(x) { + TS(1 | 2 || 3) => (), //~ ERROR unexpected token `||` after pattern + _ => (), + } + + struct NS { f: u8 } + + match (NS { f: x }) { + NS { f: 1 | 2 || 3 } => (), //~ ERROR unexpected token `||` after pattern + _ => (), + } + + match [x] { + [1 | 2 || 3] => (), //~ ERROR unexpected token `||` after pattern + _ => (), + } + + match x { + || 1 | 2 | 3 => (), //~ ERROR unexpected token `||` after pattern + _ => (), + } +} diff --git a/src/test/ui/or-patterns/multiple-pattern-typo.stderr b/src/test/ui/or-patterns/multiple-pattern-typo.stderr new file mode 100644 index 00000000000..c61b5cb2082 --- /dev/null +++ b/src/test/ui/or-patterns/multiple-pattern-typo.stderr @@ -0,0 +1,52 @@ +error: unexpected token `||` after pattern + --> $DIR/multiple-pattern-typo.rs:8:15 + | +LL | 1 | 2 || 3 => (), + | ^^ help: use a single `|` to separate multiple alternative patterns: `|` + +error: unexpected token `||` after pattern + --> $DIR/multiple-pattern-typo.rs:13:16 + | +LL | (1 | 2 || 3) => (), + | ^^ help: use a single `|` to separate multiple alternative patterns: `|` + +error: unexpected token `||` after pattern + --> $DIR/multiple-pattern-typo.rs:18:16 + | +LL | (1 | 2 || 3,) => (), + | ^^ help: use a single `|` to separate multiple alternative patterns: `|` + +error: unexpected token `||` after pattern + --> $DIR/multiple-pattern-typo.rs:25:18 + | +LL | TS(1 | 2 || 3) => (), + | ^^ help: use a single `|` to separate multiple alternative patterns: `|` + +error: unexpected token `||` after pattern + --> $DIR/multiple-pattern-typo.rs:32:23 + | +LL | NS { f: 1 | 2 || 3 } => (), + | ^^ help: use a single `|` to separate multiple alternative patterns: `|` + +error: unexpected token `||` after pattern + --> $DIR/multiple-pattern-typo.rs:37:16 + | +LL | [1 | 2 || 3] => (), + | ^^ help: use a single `|` to separate multiple alternative patterns: `|` + +error: unexpected token `||` after pattern + --> $DIR/multiple-pattern-typo.rs:42:9 + | +LL | || 1 | 2 | 3 => (), + | ^^ help: use a single `|` to separate multiple alternative patterns: `|` + +warning: the feature `or_patterns` is incomplete and may cause the compiler to crash + --> $DIR/multiple-pattern-typo.rs:1:12 + | +LL | #![feature(or_patterns)] + | ^^^^^^^^^^^ + | + = note: `#[warn(incomplete_features)]` on by default + +error: aborting due to 7 previous errors + diff --git a/src/test/ui/or-pattern-mismatch.rs b/src/test/ui/or-patterns/or-pattern-mismatch.rs index 973954bca5a..973954bca5a 100644 --- a/src/test/ui/or-pattern-mismatch.rs +++ b/src/test/ui/or-patterns/or-pattern-mismatch.rs diff --git a/src/test/ui/or-pattern-mismatch.stderr b/src/test/ui/or-patterns/or-pattern-mismatch.stderr index 731b2090a7b..731b2090a7b 100644 --- a/src/test/ui/or-pattern-mismatch.stderr +++ b/src/test/ui/or-patterns/or-pattern-mismatch.stderr diff --git a/src/test/ui/or-patterns/or-patterns-syntactic-fail.rs b/src/test/ui/or-patterns/or-patterns-syntactic-fail.rs new file mode 100644 index 00000000000..b676ea851a3 --- /dev/null +++ b/src/test/ui/or-patterns/or-patterns-syntactic-fail.rs @@ -0,0 +1,53 @@ +// Test some cases where or-patterns may ostensibly be allowed but are in fact not. +// This is not a semantic test. We only test parsing. + +#![feature(or_patterns)] +//~^ WARN the feature `or_patterns` is incomplete and may cause the compiler to crash + +fn main() {} + +// Test the `pat` macro fragment parser: +macro_rules! accept_pat { + ($p:pat) => {} +} + +accept_pat!(p | q); //~ ERROR no rules expected the token `|` +accept_pat!(| p | q); //~ ERROR no rules expected the token `|` + +// Non-macro tests: + +enum E { A, B } +use E::*; + +fn no_top_level_or_patterns() { + // We do *not* allow or-patterns at the top level of lambdas... + let _ = |A | B: E| (); //~ ERROR binary operation `|` cannot be applied to type `E` + // -------- This looks like an or-pattern but is in fact `|A| (B: E | ())`. + + // ...and for now neither do we allow or-patterns at the top level of functions. + fn fun1(A | B: E) {} //~ ERROR an or-pattern parameter must be wrapped in parenthesis + + fn fun2(| A | B: E) {} + //~^ ERROR a leading `|` is not allowed in a parameter pattern + //~| ERROR an or-pattern parameter must be wrapped in parenthesis +} + +// We also do not allow a leading `|` when not in a top level position: + +fn no_leading_inner() { + struct TS(E); + struct NS { f: E } + + let ( | A | B) = E::A; //~ ERROR a leading `|` is only allowed in a top-level pattern + let ( | A | B,) = (E::B,); //~ ERROR a leading `|` is only allowed in a top-level pattern + let [ | A | B ] = [E::A]; //~ ERROR a leading `|` is only allowed in a top-level pattern + let TS( | A | B ); //~ ERROR a leading `|` is only allowed in a top-level pattern + let NS { f: | A | B }; //~ ERROR a leading `|` is only allowed in a top-level pattern + + let ( || A | B) = E::A; //~ ERROR a leading `|` is only allowed in a top-level pattern + let [ || A | B ] = [E::A]; //~ ERROR a leading `|` is only allowed in a top-level pattern + let TS( || A | B ); //~ ERROR a leading `|` is only allowed in a top-level pattern + let NS { f: || A | B }; //~ ERROR a leading `|` is only allowed in a top-level pattern + + let recovery_witness: String = 0; //~ ERROR mismatched types +} diff --git a/src/test/ui/or-patterns/or-patterns-syntactic-fail.stderr b/src/test/ui/or-patterns/or-patterns-syntactic-fail.stderr new file mode 100644 index 00000000000..2a3a6abfb7b --- /dev/null +++ b/src/test/ui/or-patterns/or-patterns-syntactic-fail.stderr @@ -0,0 +1,124 @@ +error: an or-pattern parameter must be wrapped in parenthesis + --> $DIR/or-patterns-syntactic-fail.rs:28:13 + | +LL | fn fun1(A | B: E) {} + | ^^^^^ help: wrap the pattern in parenthesis: `(A | B)` + +error: a leading `|` is not allowed in a parameter pattern + --> $DIR/or-patterns-syntactic-fail.rs:30:13 + | +LL | fn fun2(| A | B: E) {} + | ^ help: remove the `|` + +error: an or-pattern parameter must be wrapped in parenthesis + --> $DIR/or-patterns-syntactic-fail.rs:30:15 + | +LL | fn fun2(| A | B: E) {} + | ^^^^^ help: wrap the pattern in parenthesis: `(A | B)` + +error: a leading `|` is only allowed in a top-level pattern + --> $DIR/or-patterns-syntactic-fail.rs:41:11 + | +LL | let ( | A | B) = E::A; + | ^ help: remove the `|` + +error: a leading `|` is only allowed in a top-level pattern + --> $DIR/or-patterns-syntactic-fail.rs:42:11 + | +LL | let ( | A | B,) = (E::B,); + | ^ help: remove the `|` + +error: a leading `|` is only allowed in a top-level pattern + --> $DIR/or-patterns-syntactic-fail.rs:43:11 + | +LL | let [ | A | B ] = [E::A]; + | ^ help: remove the `|` + +error: a leading `|` is only allowed in a top-level pattern + --> $DIR/or-patterns-syntactic-fail.rs:44:13 + | +LL | let TS( | A | B ); + | ^ help: remove the `|` + +error: a leading `|` is only allowed in a top-level pattern + --> $DIR/or-patterns-syntactic-fail.rs:45:17 + | +LL | let NS { f: | A | B }; + | ^ help: remove the `|` + +error: a leading `|` is only allowed in a top-level pattern + --> $DIR/or-patterns-syntactic-fail.rs:47:11 + | +LL | let ( || A | B) = E::A; + | ^^ help: remove the `||` + +error: a leading `|` is only allowed in a top-level pattern + --> $DIR/or-patterns-syntactic-fail.rs:48:11 + | +LL | let [ || A | B ] = [E::A]; + | ^^ help: remove the `||` + +error: a leading `|` is only allowed in a top-level pattern + --> $DIR/or-patterns-syntactic-fail.rs:49:13 + | +LL | let TS( || A | B ); + | ^^ help: remove the `||` + +error: a leading `|` is only allowed in a top-level pattern + --> $DIR/or-patterns-syntactic-fail.rs:50:17 + | +LL | let NS { f: || A | B }; + | ^^ help: remove the `||` + +error: no rules expected the token `|` + --> $DIR/or-patterns-syntactic-fail.rs:14:15 + | +LL | macro_rules! accept_pat { + | ----------------------- when calling this macro +... +LL | accept_pat!(p | q); + | ^ no rules expected this token in macro call + +error: no rules expected the token `|` + --> $DIR/or-patterns-syntactic-fail.rs:15:13 + | +LL | macro_rules! accept_pat { + | ----------------------- when calling this macro +... +LL | accept_pat!(| p | q); + | ^ no rules expected this token in macro call + +warning: the feature `or_patterns` is incomplete and may cause the compiler to crash + --> $DIR/or-patterns-syntactic-fail.rs:4:12 + | +LL | #![feature(or_patterns)] + | ^^^^^^^^^^^ + | + = note: `#[warn(incomplete_features)]` on by default + +error[E0369]: binary operation `|` cannot be applied to type `E` + --> $DIR/or-patterns-syntactic-fail.rs:24:22 + | +LL | let _ = |A | B: E| (); + | ----^ -- () + | | + | E + | + = note: an implementation of `std::ops::BitOr` might be missing for `E` + +error[E0308]: mismatched types + --> $DIR/or-patterns-syntactic-fail.rs:52:36 + | +LL | let recovery_witness: String = 0; + | ^ + | | + | expected struct `std::string::String`, found integer + | help: try using a conversion method: `0.to_string()` + | + = note: expected type `std::string::String` + found type `{integer}` + +error: aborting due to 16 previous errors + +Some errors have detailed explanations: E0308, E0369. +For more information about an error, try `rustc --explain E0308`. diff --git a/src/test/ui/or-patterns/or-patterns-syntactic-pass.rs b/src/test/ui/or-patterns/or-patterns-syntactic-pass.rs new file mode 100644 index 00000000000..5fe72caf9c1 --- /dev/null +++ b/src/test/ui/or-patterns/or-patterns-syntactic-pass.rs @@ -0,0 +1,78 @@ +// Here we test all the places `|` is *syntactically* allowed. +// This is not a semantic test. We only test parsing. + +// check-pass + +#![feature(or_patterns)] + +fn main() {} + +// Test the `pat` macro fragment parser: +macro_rules! accept_pat { + ($p:pat) => {} +} + +accept_pat!((p | q)); +accept_pat!((p | q,)); +accept_pat!(TS(p | q)); +accept_pat!(NS { f: p | q }); +accept_pat!([p | q]); + +// Non-macro tests: + +#[cfg(FALSE)] +fn or_patterns() { + // Top level of `let`: + let | A | B; + let A | B; + let A | B: u8; + let A | B = 0; + let A | B: u8 = 0; + + // Top level of `for`: + for | A | B in 0 {} + for A | B in 0 {} + + // Top level of `while`: + while let | A | B = 0 {} + while let A | B = 0 {} + + // Top level of `if`: + if let | A | B = 0 {} + if let A | B = 0 {} + + // Top level of `match` arms: + match 0 { + | A | B => {}, + A | B => {}, + } + + // Functions: + fn fun((A | B): _) {} + + // Lambdas: + let _ = |(A | B): u8| (); + + // Parenthesis and tuple patterns: + let (A | B); + let (A | B,); + + // Tuple struct patterns: + let A(B | C); + let E::V(B | C); + + // Struct patterns: + let S { f1: B | C, f2 }; + let E::V { f1: B | C, f2 }; + + // Slice patterns: + let [A | B, .. | ..]; + + // These bind as `(prefix p) | q` as opposed to `prefix (p | q)`: + let box 0 | 1; // Unstable; we *can* the precedence if we want. + let &0 | 1; + let &mut 0 | 1; + let x @ 0 | 1; + let ref x @ 0 | 1; + let ref mut x @ 0 | 1; +} diff --git a/src/test/ui/or-patterns/or-patterns-syntactic-pass.stderr b/src/test/ui/or-patterns/or-patterns-syntactic-pass.stderr new file mode 100644 index 00000000000..3145a2e9f2a --- /dev/null +++ b/src/test/ui/or-patterns/or-patterns-syntactic-pass.stderr @@ -0,0 +1,8 @@ +warning: the feature `or_patterns` is incomplete and may cause the compiler to crash + --> $DIR/or-patterns-syntactic-pass.rs:6:12 + | +LL | #![feature(or_patterns)] + | ^^^^^^^^^^^ + | + = note: `#[warn(incomplete_features)]` on by default + diff --git a/src/test/ui/or-patterns/remove-leading-vert.fixed b/src/test/ui/or-patterns/remove-leading-vert.fixed new file mode 100644 index 00000000000..e96d76061ac --- /dev/null +++ b/src/test/ui/or-patterns/remove-leading-vert.fixed @@ -0,0 +1,23 @@ +// Test the suggestion to remove a leading `|`. + +// run-rustfix + +#![feature(or_patterns)] +#![allow(warnings)] + +fn main() {} + +#[cfg(FALSE)] +fn leading_vert() { + fn fun1( A: E) {} //~ ERROR a leading `|` is not allowed in a parameter pattern + fn fun2( A: E) {} //~ ERROR a leading `|` is not allowed in a parameter pattern + let ( A): E; //~ ERROR a leading `|` is only allowed in a top-level pattern + let ( A): (E); //~ ERROR a leading `|` is only allowed in a top-level pattern + let ( A,): (E,); //~ ERROR a leading `|` is only allowed in a top-level pattern + let [ A ]: [E; 1]; //~ ERROR a leading `|` is only allowed in a top-level pattern + let [ A ]: [E; 1]; //~ ERROR a leading `|` is only allowed in a top-level pattern + let TS( A ): TS; //~ ERROR a leading `|` is only allowed in a top-level pattern + let TS( A ): TS; //~ ERROR a leading `|` is only allowed in a top-level pattern + let NS { f: A }: NS; //~ ERROR a leading `|` is only allowed in a top-level pattern + let NS { f: A }: NS; //~ ERROR a leading `|` is only allowed in a top-level pattern +} diff --git a/src/test/ui/or-patterns/remove-leading-vert.rs b/src/test/ui/or-patterns/remove-leading-vert.rs new file mode 100644 index 00000000000..3790b17553f --- /dev/null +++ b/src/test/ui/or-patterns/remove-leading-vert.rs @@ -0,0 +1,23 @@ +// Test the suggestion to remove a leading `|`. + +// run-rustfix + +#![feature(or_patterns)] +#![allow(warnings)] + +fn main() {} + +#[cfg(FALSE)] +fn leading_vert() { + fn fun1( | A: E) {} //~ ERROR a leading `|` is not allowed in a parameter pattern + fn fun2( || A: E) {} //~ ERROR a leading `|` is not allowed in a parameter pattern + let ( | A): E; //~ ERROR a leading `|` is only allowed in a top-level pattern + let ( || A): (E); //~ ERROR a leading `|` is only allowed in a top-level pattern + let ( | A,): (E,); //~ ERROR a leading `|` is only allowed in a top-level pattern + let [ | A ]: [E; 1]; //~ ERROR a leading `|` is only allowed in a top-level pattern + let [ || A ]: [E; 1]; //~ ERROR a leading `|` is only allowed in a top-level pattern + let TS( | A ): TS; //~ ERROR a leading `|` is only allowed in a top-level pattern + let TS( || A ): TS; //~ ERROR a leading `|` is only allowed in a top-level pattern + let NS { f: | A }: NS; //~ ERROR a leading `|` is only allowed in a top-level pattern + let NS { f: || A }: NS; //~ ERROR a leading `|` is only allowed in a top-level pattern +} diff --git a/src/test/ui/or-patterns/remove-leading-vert.stderr b/src/test/ui/or-patterns/remove-leading-vert.stderr new file mode 100644 index 00000000000..cbe06f99729 --- /dev/null +++ b/src/test/ui/or-patterns/remove-leading-vert.stderr @@ -0,0 +1,68 @@ +error: a leading `|` is not allowed in a parameter pattern + --> $DIR/remove-leading-vert.rs:12:14 + | +LL | fn fun1( | A: E) {} + | ^ help: remove the `|` + +error: a leading `|` is not allowed in a parameter pattern + --> $DIR/remove-leading-vert.rs:13:14 + | +LL | fn fun2( || A: E) {} + | ^^ help: remove the `||` + +error: a leading `|` is only allowed in a top-level pattern + --> $DIR/remove-leading-vert.rs:14:11 + | +LL | let ( | A): E; + | ^ help: remove the `|` + +error: a leading `|` is only allowed in a top-level pattern + --> $DIR/remove-leading-vert.rs:15:11 + | +LL | let ( || A): (E); + | ^^ help: remove the `||` + +error: a leading `|` is only allowed in a top-level pattern + --> $DIR/remove-leading-vert.rs:16:11 + | +LL | let ( | A,): (E,); + | ^ help: remove the `|` + +error: a leading `|` is only allowed in a top-level pattern + --> $DIR/remove-leading-vert.rs:17:11 + | +LL | let [ | A ]: [E; 1]; + | ^ help: remove the `|` + +error: a leading `|` is only allowed in a top-level pattern + --> $DIR/remove-leading-vert.rs:18:11 + | +LL | let [ || A ]: [E; 1]; + | ^^ help: remove the `||` + +error: a leading `|` is only allowed in a top-level pattern + --> $DIR/remove-leading-vert.rs:19:13 + | +LL | let TS( | A ): TS; + | ^ help: remove the `|` + +error: a leading `|` is only allowed in a top-level pattern + --> $DIR/remove-leading-vert.rs:20:13 + | +LL | let TS( || A ): TS; + | ^^ help: remove the `||` + +error: a leading `|` is only allowed in a top-level pattern + --> $DIR/remove-leading-vert.rs:21:17 + | +LL | let NS { f: | A }: NS; + | ^ help: remove the `|` + +error: a leading `|` is only allowed in a top-level pattern + --> $DIR/remove-leading-vert.rs:22:17 + | +LL | let NS { f: || A }: NS; + | ^^ help: remove the `||` + +error: aborting due to 11 previous errors + diff --git a/src/test/ui/or-patterns/while-parsing-this-or-pattern.rs b/src/test/ui/or-patterns/while-parsing-this-or-pattern.rs new file mode 100644 index 00000000000..4a9fae1406a --- /dev/null +++ b/src/test/ui/or-patterns/while-parsing-this-or-pattern.rs @@ -0,0 +1,9 @@ +// Test the parser for the "while parsing this or-pattern..." label here. + +fn main() { + match Some(42) { + Some(42) | .=. => {} //~ ERROR expected pattern, found `.` + //~^ while parsing this or-pattern staring here + //~| NOTE expected pattern + } +} diff --git a/src/test/ui/or-patterns/while-parsing-this-or-pattern.stderr b/src/test/ui/or-patterns/while-parsing-this-or-pattern.stderr new file mode 100644 index 00000000000..21fece6c64f --- /dev/null +++ b/src/test/ui/or-patterns/while-parsing-this-or-pattern.stderr @@ -0,0 +1,10 @@ +error: expected pattern, found `.` + --> $DIR/while-parsing-this-or-pattern.rs:5:20 + | +LL | Some(42) | .=. => {} + | -------- ^ expected pattern + | | + | while parsing this or-pattern staring here + +error: aborting due to previous error + diff --git a/src/test/ui/parser/bad-match.rs b/src/test/ui/parser/bad-match.rs index 79bc7eec311..04100d1701d 100644 --- a/src/test/ui/parser/bad-match.rs +++ b/src/test/ui/parser/bad-match.rs @@ -1,4 +1,4 @@ fn main() { - let isize x = 5; //~ ERROR expected one of `:`, `;`, `=`, or `@`, found `x` + let isize x = 5; //~ ERROR expected one of `:`, `;`, `=`, `@`, or `|`, found `x` match x; } diff --git a/src/test/ui/parser/bad-match.stderr b/src/test/ui/parser/bad-match.stderr index 2f29b978e9c..d5baaf5e93b 100644 --- a/src/test/ui/parser/bad-match.stderr +++ b/src/test/ui/parser/bad-match.stderr @@ -1,8 +1,8 @@ -error: expected one of `:`, `;`, `=`, or `@`, found `x` +error: expected one of `:`, `;`, `=`, `@`, or `|`, found `x` --> $DIR/bad-match.rs:2:13 | LL | let isize x = 5; - | ^ expected one of `:`, `;`, `=`, or `@` here + | ^ expected one of `:`, `;`, `=`, `@`, or `|` here error: aborting due to previous error diff --git a/src/test/ui/parser/bad-name.stderr b/src/test/ui/parser/bad-name.stderr index 15e61cf06ca..dce4dabedf5 100644 --- a/src/test/ui/parser/bad-name.stderr +++ b/src/test/ui/parser/bad-name.stderr @@ -1,8 +1,8 @@ -error: expected one of `:`, `;`, `=`, or `@`, found `.` +error: expected one of `:`, `;`, `=`, `@`, or `|`, found `.` --> $DIR/bad-name.rs:4:8 | LL | let x.y::<isize>.z foo; - | ^ expected one of `:`, `;`, `=`, or `@` here + | ^ expected one of `:`, `;`, `=`, `@`, or `|` here error: aborting due to previous error diff --git a/src/test/ui/parser/inverted-parameters.rs b/src/test/ui/parser/inverted-parameters.rs index f06b9510417..d6efc8be072 100644 --- a/src/test/ui/parser/inverted-parameters.rs +++ b/src/test/ui/parser/inverted-parameters.rs @@ -2,29 +2,29 @@ struct S; impl S { fn foo(&self, &str bar) {} - //~^ ERROR expected one of `:` or `@` + //~^ ERROR expected one of `:`, `@` //~| HELP declare the type after the parameter binding //~| SUGGESTION <identifier>: <type> } fn baz(S quux, xyzzy: i32) {} -//~^ ERROR expected one of `:` or `@` +//~^ ERROR expected one of `:`, `@` //~| HELP declare the type after the parameter binding //~| SUGGESTION <identifier>: <type> fn one(i32 a b) {} -//~^ ERROR expected one of `:` or `@` +//~^ ERROR expected one of `:`, `@` fn pattern((i32, i32) (a, b)) {} -//~^ ERROR expected `:` +//~^ ERROR expected one of `:` fn fizz(i32) {} -//~^ ERROR expected one of `:` or `@` +//~^ ERROR expected one of `:`, `@` //~| HELP if this was a parameter name, give it a type //~| HELP if this is a type, explicitly ignore the parameter name fn missing_colon(quux S) {} -//~^ ERROR expected one of `:` or `@` +//~^ ERROR expected one of `:`, `@` //~| HELP declare the type after the parameter binding //~| SUGGESTION <identifier>: <type> diff --git a/src/test/ui/parser/inverted-parameters.stderr b/src/test/ui/parser/inverted-parameters.stderr index fb48bd1fe93..2bda4460031 100644 --- a/src/test/ui/parser/inverted-parameters.stderr +++ b/src/test/ui/parser/inverted-parameters.stderr @@ -1,38 +1,38 @@ -error: expected one of `:` or `@`, found `bar` +error: expected one of `:`, `@`, or `|`, found `bar` --> $DIR/inverted-parameters.rs:4:24 | LL | fn foo(&self, &str bar) {} | -----^^^ | | | - | | expected one of `:` or `@` here + | | expected one of `:`, `@`, or `|` here | help: declare the type after the parameter binding: `<identifier>: <type>` -error: expected one of `:` or `@`, found `quux` +error: expected one of `:`, `@`, or `|`, found `quux` --> $DIR/inverted-parameters.rs:10:10 | LL | fn baz(S quux, xyzzy: i32) {} | --^^^^ | | | - | | expected one of `:` or `@` here + | | expected one of `:`, `@`, or `|` here | help: declare the type after the parameter binding: `<identifier>: <type>` -error: expected one of `:` or `@`, found `a` +error: expected one of `:`, `@`, or `|`, found `a` --> $DIR/inverted-parameters.rs:15:12 | LL | fn one(i32 a b) {} - | ^ expected one of `:` or `@` here + | ^ expected one of `:`, `@`, or `|` here -error: expected `:`, found `(` +error: expected one of `:` or `|`, found `(` --> $DIR/inverted-parameters.rs:18:23 | LL | fn pattern((i32, i32) (a, b)) {} - | ^ expected `:` + | ^ expected one of `:` or `|` here -error: expected one of `:` or `@`, found `)` +error: expected one of `:`, `@`, or `|`, found `)` --> $DIR/inverted-parameters.rs:21:12 | LL | fn fizz(i32) {} - | ^ expected one of `:` or `@` here + | ^ expected one of `:`, `@`, or `|` here | = note: anonymous parameters are removed in the 2018 edition (see RFC 1685) help: if this was a parameter name, give it a type @@ -44,13 +44,13 @@ help: if this is a type, explicitly ignore the parameter name LL | fn fizz(_: i32) {} | ^^^^^^ -error: expected one of `:` or `@`, found `S` +error: expected one of `:`, `@`, or `|`, found `S` --> $DIR/inverted-parameters.rs:26:23 | LL | fn missing_colon(quux S) {} | -----^ | | | - | | expected one of `:` or `@` here + | | expected one of `:`, `@`, or `|` here | help: declare the type after the parameter binding: `<identifier>: <type>` error: aborting due to 6 previous errors diff --git a/src/test/ui/parser/issue-22647.rs b/src/test/ui/parser/issue-22647.rs index 25cd7ffce5a..a6861410682 100644 --- a/src/test/ui/parser/issue-22647.rs +++ b/src/test/ui/parser/issue-22647.rs @@ -1,5 +1,5 @@ fn main() { - let caller<F> = |f: F| //~ ERROR expected one of `:`, `;`, `=`, or `@`, found `<` + let caller<F> = |f: F| //~ ERROR expected one of `:`, `;`, `=`, `@`, or `|`, found `<` where F: Fn() -> i32 { let x = f(); diff --git a/src/test/ui/parser/issue-22647.stderr b/src/test/ui/parser/issue-22647.stderr index 2dc56a5eca3..4b1ef4f3dfc 100644 --- a/src/test/ui/parser/issue-22647.stderr +++ b/src/test/ui/parser/issue-22647.stderr @@ -1,8 +1,8 @@ -error: expected one of `:`, `;`, `=`, or `@`, found `<` +error: expected one of `:`, `;`, `=`, `@`, or `|`, found `<` --> $DIR/issue-22647.rs:2:15 | LL | let caller<F> = |f: F| - | ^ expected one of `:`, `;`, `=`, or `@` here + | ^ expected one of `:`, `;`, `=`, `@`, or `|` here error: aborting due to previous error diff --git a/src/test/ui/parser/issue-22712.rs b/src/test/ui/parser/issue-22712.rs index b03d578e3d6..774de9c7e64 100644 --- a/src/test/ui/parser/issue-22712.rs +++ b/src/test/ui/parser/issue-22712.rs @@ -3,7 +3,7 @@ struct Foo<B> { } fn bar() { - let Foo<Vec<u8>> //~ ERROR expected one of `:`, `;`, `=`, or `@`, found `<` + let Foo<Vec<u8>> //~ ERROR expected one of `:`, `;`, `=`, `@`, or `|`, found `<` } fn main() {} diff --git a/src/test/ui/parser/issue-22712.stderr b/src/test/ui/parser/issue-22712.stderr index 167eaf962e0..d9e83144b36 100644 --- a/src/test/ui/parser/issue-22712.stderr +++ b/src/test/ui/parser/issue-22712.stderr @@ -1,8 +1,8 @@ -error: expected one of `:`, `;`, `=`, or `@`, found `<` +error: expected one of `:`, `;`, `=`, `@`, or `|`, found `<` --> $DIR/issue-22712.rs:6:12 | LL | let Foo<Vec<u8>> - | ^ expected one of `:`, `;`, `=`, or `@` here + | ^ expected one of `:`, `;`, `=`, `@`, or `|` here error: aborting due to previous error diff --git a/src/test/ui/parser/issue-24197.rs b/src/test/ui/parser/issue-24197.rs index 005ff9fa2e0..aaf5137461f 100644 --- a/src/test/ui/parser/issue-24197.rs +++ b/src/test/ui/parser/issue-24197.rs @@ -1,3 +1,3 @@ fn main() { - let buf[0] = 0; //~ ERROR expected one of `:`, `;`, `=`, or `@`, found `[` + let buf[0] = 0; //~ ERROR expected one of `:`, `;`, `=`, `@`, or `|`, found `[` } diff --git a/src/test/ui/parser/issue-24197.stderr b/src/test/ui/parser/issue-24197.stderr index 2dfb31432bc..24818db622a 100644 --- a/src/test/ui/parser/issue-24197.stderr +++ b/src/test/ui/parser/issue-24197.stderr @@ -1,8 +1,8 @@ -error: expected one of `:`, `;`, `=`, or `@`, found `[` +error: expected one of `:`, `;`, `=`, `@`, or `|`, found `[` --> $DIR/issue-24197.rs:2:12 | LL | let buf[0] = 0; - | ^ expected one of `:`, `;`, `=`, or `@` here + | ^ expected one of `:`, `;`, `=`, `@`, or `|` here error: aborting due to previous error diff --git a/src/test/ui/parser/issue-33413.rs b/src/test/ui/parser/issue-33413.rs index 2ec86958174..22f80a8aae8 100644 --- a/src/test/ui/parser/issue-33413.rs +++ b/src/test/ui/parser/issue-33413.rs @@ -2,7 +2,7 @@ struct S; impl S { fn f(*, a: u8) -> u8 {} - //~^ ERROR expected argument name, found `*` + //~^ ERROR expected parameter name, found `*` } fn main() {} diff --git a/src/test/ui/parser/issue-33413.stderr b/src/test/ui/parser/issue-33413.stderr index f6f096b1b9a..9e1178e8ac1 100644 --- a/src/test/ui/parser/issue-33413.stderr +++ b/src/test/ui/parser/issue-33413.stderr @@ -1,8 +1,8 @@ -error: expected argument name, found `*` +error: expected parameter name, found `*` --> $DIR/issue-33413.rs:4:10 | LL | fn f(*, a: u8) -> u8 {} - | ^ expected argument name + | ^ expected parameter name error: aborting due to previous error diff --git a/src/test/ui/parser/issue-63135.rs b/src/test/ui/parser/issue-63135.rs index d5f5f1469f3..a5a8de85466 100644 --- a/src/test/ui/parser/issue-63135.rs +++ b/src/test/ui/parser/issue-63135.rs @@ -1,3 +1,3 @@ -// error-pattern: aborting due to 6 previous errors +// error-pattern: aborting due to 5 previous errors fn i(n{...,f # diff --git a/src/test/ui/parser/issue-63135.stderr b/src/test/ui/parser/issue-63135.stderr index c0286d90af7..a077ad454a9 100644 --- a/src/test/ui/parser/issue-63135.stderr +++ b/src/test/ui/parser/issue-63135.stderr @@ -28,17 +28,11 @@ error: expected `[`, found `}` LL | fn i(n{...,f # | ^ expected `[` -error: expected `:`, found `)` +error: expected one of `:` or `|`, found `)` --> $DIR/issue-63135.rs:3:15 | LL | fn i(n{...,f # - | ^ expected `:` + | ^ expected one of `:` or `|` here -error: expected one of `->`, `where`, or `{`, found `<eof>` - --> $DIR/issue-63135.rs:3:15 - | -LL | fn i(n{...,f # - | ^ expected one of `->`, `where`, or `{` here - -error: aborting due to 6 previous errors +error: aborting due to 5 previous errors diff --git a/src/test/ui/parser/mut-patterns.rs b/src/test/ui/parser/mut-patterns.rs index a5eb4825239..bffeb1e2e7c 100644 --- a/src/test/ui/parser/mut-patterns.rs +++ b/src/test/ui/parser/mut-patterns.rs @@ -2,5 +2,6 @@ pub fn main() { struct Foo { x: isize } - let mut Foo { x: x } = Foo { x: 3 }; //~ ERROR: expected one of `:`, `;`, `=`, or `@`, found `{` + let mut Foo { x: x } = Foo { x: 3 }; + //~^ ERROR: expected one of `:`, `;`, `=`, `@`, or `|`, found `{` } diff --git a/src/test/ui/parser/mut-patterns.stderr b/src/test/ui/parser/mut-patterns.stderr index 286956440ec..b39209afd42 100644 --- a/src/test/ui/parser/mut-patterns.stderr +++ b/src/test/ui/parser/mut-patterns.stderr @@ -1,8 +1,8 @@ -error: expected one of `:`, `;`, `=`, or `@`, found `{` +error: expected one of `:`, `;`, `=`, `@`, or `|`, found `{` --> $DIR/mut-patterns.rs:5:17 | LL | let mut Foo { x: x } = Foo { x: 3 }; - | ^ expected one of `:`, `;`, `=`, or `@` here + | ^ expected one of `:`, `;`, `=`, `@`, or `|` here error: aborting due to previous error diff --git a/src/test/ui/parser/omitted-arg-in-item-fn.rs b/src/test/ui/parser/omitted-arg-in-item-fn.rs index 5ee9daf4640..49cbc4d6bf4 100644 --- a/src/test/ui/parser/omitted-arg-in-item-fn.rs +++ b/src/test/ui/parser/omitted-arg-in-item-fn.rs @@ -1,4 +1,4 @@ -fn foo(x) { //~ ERROR expected one of `:` or `@`, found `)` +fn foo(x) { //~ ERROR expected one of `:`, `@`, or `|`, found `)` } fn main() {} diff --git a/src/test/ui/parser/omitted-arg-in-item-fn.stderr b/src/test/ui/parser/omitted-arg-in-item-fn.stderr index e501f235d6d..7feb15592c5 100644 --- a/src/test/ui/parser/omitted-arg-in-item-fn.stderr +++ b/src/test/ui/parser/omitted-arg-in-item-fn.stderr @@ -1,8 +1,8 @@ -error: expected one of `:` or `@`, found `)` +error: expected one of `:`, `@`, or `|`, found `)` --> $DIR/omitted-arg-in-item-fn.rs:1:9 | LL | fn foo(x) { - | ^ expected one of `:` or `@` here + | ^ expected one of `:`, `@`, or `|` here | = note: anonymous parameters are removed in the 2018 edition (see RFC 1685) help: if this was a parameter name, give it a type diff --git a/src/test/ui/parser/pat-lt-bracket-2.rs b/src/test/ui/parser/pat-lt-bracket-2.rs index 6eb01c1c933..3a778ed14f6 100644 --- a/src/test/ui/parser/pat-lt-bracket-2.rs +++ b/src/test/ui/parser/pat-lt-bracket-2.rs @@ -1,4 +1,4 @@ fn a(B<) {} - //~^ error: expected one of `:` or `@`, found `<` + //~^ error: expected one of `:`, `@`, or `|`, found `<` fn main() {} diff --git a/src/test/ui/parser/pat-lt-bracket-2.stderr b/src/test/ui/parser/pat-lt-bracket-2.stderr index cce1a17e9e8..dbc8d0f5865 100644 --- a/src/test/ui/parser/pat-lt-bracket-2.stderr +++ b/src/test/ui/parser/pat-lt-bracket-2.stderr @@ -1,8 +1,8 @@ -error: expected one of `:` or `@`, found `<` +error: expected one of `:`, `@`, or `|`, found `<` --> $DIR/pat-lt-bracket-2.rs:1:7 | LL | fn a(B<) {} - | ^ expected one of `:` or `@` here + | ^ expected one of `:`, `@`, or `|` here error: aborting due to previous error diff --git a/src/test/ui/parser/pat-lt-bracket-5.rs b/src/test/ui/parser/pat-lt-bracket-5.rs index c4b9dd469f5..aaece1f6bd9 100644 --- a/src/test/ui/parser/pat-lt-bracket-5.rs +++ b/src/test/ui/parser/pat-lt-bracket-5.rs @@ -1,3 +1,3 @@ fn main() { - let v[0] = v[1]; //~ ERROR expected one of `:`, `;`, `=`, or `@`, found `[` + let v[0] = v[1]; //~ ERROR expected one of `:`, `;`, `=`, `@`, or `|`, found `[` } diff --git a/src/test/ui/parser/pat-lt-bracket-5.stderr b/src/test/ui/parser/pat-lt-bracket-5.stderr index ce4cc05db19..167314dde06 100644 --- a/src/test/ui/parser/pat-lt-bracket-5.stderr +++ b/src/test/ui/parser/pat-lt-bracket-5.stderr @@ -1,8 +1,8 @@ -error: expected one of `:`, `;`, `=`, or `@`, found `[` +error: expected one of `:`, `;`, `=`, `@`, or `|`, found `[` --> $DIR/pat-lt-bracket-5.rs:2:10 | LL | let v[0] = v[1]; - | ^ expected one of `:`, `;`, `=`, or `@` here + | ^ expected one of `:`, `;`, `=`, `@`, or `|` here error: aborting due to previous error diff --git a/src/test/ui/parser/pat-ranges-1.rs b/src/test/ui/parser/pat-ranges-1.rs index ce953b2eb22..1dafb5a07bb 100644 --- a/src/test/ui/parser/pat-ranges-1.rs +++ b/src/test/ui/parser/pat-ranges-1.rs @@ -1,5 +1,5 @@ // Parsing of range patterns fn main() { - let macropus!() ..= 11 = 12; //~ error: expected one of `:`, `;`, or `=`, found `..=` + let macropus!() ..= 11 = 12; //~ error: expected one of `:`, `;`, `=`, or `|`, found `..=` } diff --git a/src/test/ui/parser/pat-ranges-1.stderr b/src/test/ui/parser/pat-ranges-1.stderr index 6e0deccab8c..4e2c5d28381 100644 --- a/src/test/ui/parser/pat-ranges-1.stderr +++ b/src/test/ui/parser/pat-ranges-1.stderr @@ -1,8 +1,8 @@ -error: expected one of `:`, `;`, or `=`, found `..=` +error: expected one of `:`, `;`, `=`, or `|`, found `..=` --> $DIR/pat-ranges-1.rs:4:21 | LL | let macropus!() ..= 11 = 12; - | ^^^ expected one of `:`, `;`, or `=` here + | ^^^ expected one of `:`, `;`, `=`, or `|` here error: aborting due to previous error diff --git a/src/test/ui/parser/pat-ranges-2.rs b/src/test/ui/parser/pat-ranges-2.rs index 9f736ed328c..1593222acca 100644 --- a/src/test/ui/parser/pat-ranges-2.rs +++ b/src/test/ui/parser/pat-ranges-2.rs @@ -1,5 +1,5 @@ // Parsing of range patterns fn main() { - let 10 ..= makropulos!() = 12; //~ error: expected one of `::`, `:`, `;`, or `=`, found `!` + let 10 ..= makropulos!() = 12; //~ error: expected one of `::`, `:`, `;`, `=`, or `|`, found `!` } diff --git a/src/test/ui/parser/pat-ranges-2.stderr b/src/test/ui/parser/pat-ranges-2.stderr index d180bb42911..64df56f5a61 100644 --- a/src/test/ui/parser/pat-ranges-2.stderr +++ b/src/test/ui/parser/pat-ranges-2.stderr @@ -1,8 +1,8 @@ -error: expected one of `::`, `:`, `;`, or `=`, found `!` +error: expected one of `::`, `:`, `;`, `=`, or `|`, found `!` --> $DIR/pat-ranges-2.rs:4:26 | LL | let 10 ..= makropulos!() = 12; - | ^ expected one of `::`, `:`, `;`, or `=` here + | ^ expected one of `::`, `:`, `;`, `=`, or `|` here error: aborting due to previous error diff --git a/src/test/ui/parser/pat-ranges-3.rs b/src/test/ui/parser/pat-ranges-3.rs index 65da55e3bda..8976dcf0d90 100644 --- a/src/test/ui/parser/pat-ranges-3.rs +++ b/src/test/ui/parser/pat-ranges-3.rs @@ -1,5 +1,5 @@ // Parsing of range patterns fn main() { - let 10 ..= 10 + 3 = 12; //~ expected one of `:`, `;`, or `=`, found `+` + let 10 ..= 10 + 3 = 12; //~ expected one of `:`, `;`, `=`, or `|`, found `+` } diff --git a/src/test/ui/parser/pat-ranges-3.stderr b/src/test/ui/parser/pat-ranges-3.stderr index aaa85e3c2dd..c32c18d98dc 100644 --- a/src/test/ui/parser/pat-ranges-3.stderr +++ b/src/test/ui/parser/pat-ranges-3.stderr @@ -1,8 +1,8 @@ -error: expected one of `:`, `;`, or `=`, found `+` +error: expected one of `:`, `;`, `=`, or `|`, found `+` --> $DIR/pat-ranges-3.rs:4:19 | LL | let 10 ..= 10 + 3 = 12; - | ^ expected one of `:`, `;`, or `=` here + | ^ expected one of `:`, `;`, `=`, or `|` here error: aborting due to previous error diff --git a/src/test/ui/parser/pat-ranges-4.rs b/src/test/ui/parser/pat-ranges-4.rs index 7f4a5f3239e..61188976b02 100644 --- a/src/test/ui/parser/pat-ranges-4.rs +++ b/src/test/ui/parser/pat-ranges-4.rs @@ -2,5 +2,5 @@ fn main() { let 10 - 3 ..= 10 = 8; - //~^ error: expected one of `...`, `..=`, `..`, `:`, `;`, or `=`, found `-` + //~^ error: expected one of `...`, `..=`, `..`, `:`, `;`, `=`, or `|`, found `-` } diff --git a/src/test/ui/parser/pat-ranges-4.stderr b/src/test/ui/parser/pat-ranges-4.stderr index 0a1d7a1f6b8..53e38bc670b 100644 --- a/src/test/ui/parser/pat-ranges-4.stderr +++ b/src/test/ui/parser/pat-ranges-4.stderr @@ -1,8 +1,8 @@ -error: expected one of `...`, `..=`, `..`, `:`, `;`, or `=`, found `-` +error: expected one of `...`, `..=`, `..`, `:`, `;`, `=`, or `|`, found `-` --> $DIR/pat-ranges-4.rs:4:12 | LL | let 10 - 3 ..= 10 = 8; - | ^ expected one of `...`, `..=`, `..`, `:`, `;`, or `=` here + | ^ expected one of 7 possible tokens here error: aborting due to previous error diff --git a/src/test/ui/parser/removed-syntax-mode.rs b/src/test/ui/parser/removed-syntax-mode.rs index 23851b5f70b..a438db3b0c1 100644 --- a/src/test/ui/parser/removed-syntax-mode.rs +++ b/src/test/ui/parser/removed-syntax-mode.rs @@ -1,4 +1,4 @@ fn f(+x: isize) {} -//~^ ERROR expected argument name, found `+` +//~^ ERROR expected parameter name, found `+` fn main() {} diff --git a/src/test/ui/parser/removed-syntax-mode.stderr b/src/test/ui/parser/removed-syntax-mode.stderr index 5e7139d6bfd..d0393b379f0 100644 --- a/src/test/ui/parser/removed-syntax-mode.stderr +++ b/src/test/ui/parser/removed-syntax-mode.stderr @@ -1,8 +1,8 @@ -error: expected argument name, found `+` +error: expected parameter name, found `+` --> $DIR/removed-syntax-mode.rs:1:6 | LL | fn f(+x: isize) {} - | ^ expected argument name + | ^ expected parameter name error: aborting due to previous error diff --git a/src/test/ui/rfc-2565-param-attrs/param-attrs-2018.rs b/src/test/ui/rfc-2565-param-attrs/param-attrs-2018.rs index e900ccab4fd..d71711336b0 100644 --- a/src/test/ui/rfc-2565-param-attrs/param-attrs-2018.rs +++ b/src/test/ui/rfc-2565-param-attrs/param-attrs-2018.rs @@ -3,6 +3,6 @@ #![feature(param_attrs)] trait Trait2015 { fn foo(#[allow(C)] i32); } -//~^ ERROR expected one of `:` or `@`, found `)` +//~^ ERROR expected one of `:`, `@`, or `|`, found `)` fn main() {} diff --git a/src/test/ui/rfc-2565-param-attrs/param-attrs-2018.stderr b/src/test/ui/rfc-2565-param-attrs/param-attrs-2018.stderr index d0ed65f2880..26b414e4268 100644 --- a/src/test/ui/rfc-2565-param-attrs/param-attrs-2018.stderr +++ b/src/test/ui/rfc-2565-param-attrs/param-attrs-2018.stderr @@ -1,8 +1,8 @@ -error: expected one of `:` or `@`, found `)` +error: expected one of `:`, `@`, or `|`, found `)` --> $DIR/param-attrs-2018.rs:5:41 | LL | trait Trait2015 { fn foo(#[allow(C)] i32); } - | ^ expected one of `:` or `@` here + | ^ expected one of `:`, `@`, or `|` here | = note: anonymous parameters are removed in the 2018 edition (see RFC 1685) help: if this was a parameter name, give it a type diff --git a/src/test/ui/span/issue-34264.stderr b/src/test/ui/span/issue-34264.stderr index 5dd9895c6e4..cc0eccd37a2 100644 --- a/src/test/ui/span/issue-34264.stderr +++ b/src/test/ui/span/issue-34264.stderr @@ -1,14 +1,14 @@ -error: expected one of `:` or `@`, found `<` +error: expected one of `:`, `@`, or `|`, found `<` --> $DIR/issue-34264.rs:1:14 | LL | fn foo(Option<i32>, String) {} - | ^ expected one of `:` or `@` here + | ^ expected one of `:`, `@`, or `|` here -error: expected one of `:` or `@`, found `)` +error: expected one of `:`, `@`, or `|`, found `)` --> $DIR/issue-34264.rs:1:27 | LL | fn foo(Option<i32>, String) {} - | ^ expected one of `:` or `@` here + | ^ expected one of `:`, `@`, or `|` here | = note: anonymous parameters are removed in the 2018 edition (see RFC 1685) help: if this was a parameter name, give it a type @@ -20,11 +20,11 @@ help: if this is a type, explicitly ignore the parameter name LL | fn foo(Option<i32>, _: String) {} | ^^^^^^^^^ -error: expected one of `:` or `@`, found `,` +error: expected one of `:`, `@`, or `|`, found `,` --> $DIR/issue-34264.rs:3:9 | LL | fn bar(x, y: usize) {} - | ^ expected one of `:` or `@` here + | ^ expected one of `:`, `@`, or `|` here | = note: anonymous parameters are removed in the 2018 edition (see RFC 1685) help: if this was a parameter name, give it a type diff --git a/src/tools/tidy/src/features.rs b/src/tools/tidy/src/features.rs index 468e5600101..50e9116c778 100644 --- a/src/tools/tidy/src/features.rs +++ b/src/tools/tidy/src/features.rs @@ -176,7 +176,10 @@ pub fn check(path: &Path, bad: &mut bool, verbose: bool) -> CollectedFeatures { CollectedFeatures { lib: lib_features, lang: features } } -fn format_features<'a>(features: &'a Features, family: &'a str) -> impl Iterator<Item = String> + 'a { +fn format_features<'a>( + features: &'a Features, + family: &'a str, +) -> impl Iterator<Item = String> + 'a { features.iter().map(move |(name, feature)| { format!("{:<32} {:<8} {:<12} {:<8}", name, @@ -228,7 +231,8 @@ pub fn collect_lang_features(base_src_path: &Path, bad: &mut bool) -> Features { } fn collect_lang_features_in(base: &Path, file: &str, bad: &mut bool) -> Features { - let contents = t!(fs::read_to_string(base.join("libsyntax/feature_gate").join(file))); + let path = base.join("libsyntax/feature_gate").join(file); + let contents = t!(fs::read_to_string(&path)); // We allow rustc-internal features to omit a tracking issue. // To make tidy accept omitting a tracking issue, group the list of features @@ -259,8 +263,9 @@ fn collect_lang_features_in(base: &Path, file: &str, bad: &mut bool) -> Features if in_feature_group { tidy_error!( bad, - // ignore-tidy-linelength - "libsyntax/feature_gate.rs:{}: new feature group is started without ending the previous one", + "{}:{}: \ + new feature group is started without ending the previous one", + path.display(), line_number, ); } @@ -289,7 +294,8 @@ fn collect_lang_features_in(base: &Path, file: &str, bad: &mut bool) -> Features Err(err) => { tidy_error!( bad, - "libsyntax/feature_gate.rs:{}: failed to parse since: {} ({:?})", + "{}:{}: failed to parse since: {} ({:?})", + path.display(), line_number, since_str, err, @@ -301,7 +307,8 @@ fn collect_lang_features_in(base: &Path, file: &str, bad: &mut bool) -> Features if prev_since > since { tidy_error!( bad, - "libsyntax/feature_gate.rs:{}: feature {} is not sorted by since", + "{}:{}: feature {} is not sorted by since", + path.display(), line_number, name, ); @@ -315,7 +322,8 @@ fn collect_lang_features_in(base: &Path, file: &str, bad: &mut bool) -> Features *bad = true; tidy_error!( bad, - "libsyntax/feature_gate.rs:{}: no tracking issue for feature {}", + "{}:{}: no tracking issue for feature {}", + path.display(), line_number, name, ); |