diff options
Diffstat (limited to 'compiler/rustc_feature')
| -rw-r--r-- | compiler/rustc_feature/src/accepted.rs | 446 | ||||
| -rw-r--r-- | compiler/rustc_feature/src/active.rs | 804 | ||||
| -rw-r--r-- | compiler/rustc_feature/src/builtin_attrs.rs | 503 | ||||
| -rw-r--r-- | compiler/rustc_feature/src/lib.rs | 2 | ||||
| -rw-r--r-- | compiler/rustc_feature/src/removed.rs | 196 |
5 files changed, 980 insertions, 971 deletions
diff --git a/compiler/rustc_feature/src/accepted.rs b/compiler/rustc_feature/src/accepted.rs index 941d957103c..32a9d081ed8 100644 --- a/compiler/rustc_feature/src/accepted.rs +++ b/compiler/rustc_feature/src/accepted.rs @@ -34,6 +34,9 @@ declare_features! ( /// 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), + // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! + // Features are listed in alphabetical order. Tidy will fail if you don't keep it this way. + // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! // ------------------------------------------------------------------------- // feature-group-end: for testing purposes @@ -43,262 +46,273 @@ declare_features! ( // feature-group-start: accepted features // ------------------------------------------------------------------------- + /// 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 the definition of associated constants in `trait` or `impl` blocks. + (accepted, associated_consts, "1.20.0", Some(29646), None), /// 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. - (accepted, default_type_params, "1.0.0", None, None), - // FIXME: explain `globs`. - (accepted, globs, "1.0.0", None, None), - /// Allows `macro_rules!` items. - (accepted, macro_rules, "1.0.0", None, None), - /// 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). - (accepted, struct_variant, "1.0.0", None, None), - /// Allows indexing tuples. - (accepted, tuple_indexing, "1.0.0", None, None), - /// Allows the use of `if let` expressions. - (accepted, if_let, "1.0.0", None, None), - /// Allows the use of `while let` expressions. - (accepted, while_let, "1.0.0", None, None), - /// Allows using `#![no_std]`. - (accepted, no_std, "1.6.0", None, None), + /// Allows free and inherent `async fn`s, `async` blocks, and `<expr>.await` expressions. + (accepted, async_await, "1.39.0", Some(50547), None), + /// Allows all literals in attribute lists and values of key-value pairs. + (accepted, attr_literals, "1.30.0", Some(34981), None), /// Allows overloading augmented assignment operations like `a += b`. (accepted, augmented_assignments, "1.8.0", Some(28235), None), + /// Allows mixing bind-by-move in patterns and references to those identifiers in guards. + (accepted, bind_by_move_pattern_guards, "1.39.0", Some(15287), None), + /// Allows bindings in the subpattern of a binding pattern. + /// For example, you can write `x @ Some(y)`. + (accepted, bindings_after_at, "1.56.0", Some(65490), None), /// Allows empty structs and enum variants with braces. (accepted, braced_empty_structs, "1.8.0", Some(29720), None), - /// Allows `#[deprecated]` attribute. - (accepted, deprecated, "1.9.0", Some(29935), None), - /// 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. - (accepted, question_mark, "1.13.0", Some(31436), None), - /// 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). - (accepted, item_like_imports, "1.15.0", Some(35120), None), - /// 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. - (accepted, static_in_const, "1.17.0", Some(35897), None), - /// 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. - (accepted, static_recursion, "1.17.0", Some(29719), None), - /// Allows `pub(restricted)` visibilities (RFC 1422). - (accepted, pub_restricted, "1.18.0", Some(32409), None), - /// Allows `#![windows_subsystem]`. - (accepted, windows_subsystem, "1.18.0", Some(37499), None), - /// 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. - (accepted, relaxed_adts, "1.19.0", Some(35626), None), + /// Allows `#[cfg_attr(predicate, multiple, attributes, here)]`. + (accepted, cfg_attr_multi, "1.33.0", Some(54881), None), + /// Allows the use of `#[cfg(doctest)]`, set when rustdoc is collecting doctests. + (accepted, cfg_doctest, "1.40.0", Some(62210), None), + /// Allows `cfg(target_feature = "...")`. + (accepted, cfg_target_feature, "1.27.0", Some(29717), None), + /// Allows `cfg(target_vendor = "...")`. + (accepted, cfg_target_vendor, "1.33.0", Some(29718), None), + /// Allows implementing `Clone` for closures where possible (RFC 2132). + (accepted, clone_closures, "1.26.0", Some(44490), None), /// 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. - (accepted, struct_field_attributes, "1.20.0", Some(38814), None), - /// 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. (accepted, compile_error, "1.20.0", Some(40872), None), - /// 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). - (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. - (accepted, abi_sysv64, "1.24.0", Some(36167), None), - /// 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). - (accepted, match_beginning_vert, "1.25.0", Some(44101), None), - /// Allows nested groups in `use` items (RFC 2128). - (accepted, use_nested_groups, "1.25.0", Some(44494), None), + /// Allows `impl Trait` in function return types. + (accepted, conservative_impl_trait, "1.26.0", Some(34511), None), + /// Allows calling constructor functions in `const fn`. + (accepted, const_constructor, "1.40.0", Some(61456), None), + /// Allows calling `transmute` in const fn + (accepted, const_fn_transmute, "1.56.0", Some(53605), None), + /// Allows accessing fields of unions inside `const` functions. + (accepted, const_fn_union, "1.56.0", Some(51909), None), + /// Allows unsizing coercions in `const fn`. + (accepted, const_fn_unsize, "1.54.0", Some(64992), None), + /// Allows const generics to have default values (e.g. `struct Foo<const N: usize = 3>(...);`). + (accepted, const_generics_defaults, "1.59.0", Some(44580), None), + /// Allows the use of `if` and `match` in constants. + (accepted, const_if_match, "1.46.0", Some(49146), None), /// Allows indexing into constant arrays. (accepted, const_indexing, "1.26.0", Some(29947), None), - /// 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). - (accepted, dotdoteq_in_patterns, "1.26.0", Some(28237), None), - /// 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). - (accepted, clone_closures, "1.26.0", Some(44490), 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. + (accepted, const_let, "1.33.0", Some(48821), None), + /// Allows the use of `loop` and `while` in constants. + (accepted, const_loop, "1.46.0", Some(52000), None), + /// Allows panicking during const eval (producing compile-time errors). + (accepted, const_panic, "1.57.0", Some(51999), None), + /// Allows dereferencing raw pointers during const eval. + (accepted, const_raw_ptr_deref, "1.58.0", Some(51911), None), /// Allows implementing `Copy` for closures where possible (RFC 2132). (accepted, copy_closures, "1.26.0", Some(44490), None), - /// Allows `impl Trait` in function arguments. - (accepted, universal_impl_trait, "1.26.0", Some(34511), None), - /// Allows `impl Trait` in function return types. - (accepted, conservative_impl_trait, "1.26.0", Some(34511), None), - /// Allows using the `u128` and `i128` types. - (accepted, i128_type, "1.26.0", Some(35118), None), - /// Allows default match binding modes (RFC 2005). - (accepted, match_default_bindings, "1.26.0", Some(42640), None), - /// Allows `'_` placeholder lifetimes. - (accepted, underscore_lifetimes, "1.26.0", Some(44524), None), - /// 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 = "...")`. - (accepted, cfg_target_feature, "1.27.0", Some(29717), None), - /// Allows `#[target_feature(...)]`. - (accepted, target_feature, "1.27.0", None, None), - /// 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). - (accepted, fn_must_use, "1.27.0", Some(43302), None), - /// 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). - (accepted, termination_trait_test, "1.27.0", Some(48854), None), - /// Allows the `#[global_allocator]` attribute. - (accepted, global_allocator, "1.28.0", Some(27389), None), - /// Allows `#[repr(transparent)]` attribute on newtype structs. - (accepted, repr_transparent, "1.28.0", Some(43036), None), - /// 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`. - (accepted, non_modrs_mods, "1.30.0", Some(44660), None), - /// 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. - (accepted, use_extern_macros, "1.30.0", Some(35896), None), - /// Allows keywords to be escaped for use as identifiers. - (accepted, raw_identifiers, "1.30.0", Some(48589), None), - /// Allows attributes scoped to tools. - (accepted, tool_attributes, "1.30.0", Some(44690), None), - /// 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. - (accepted, attr_literals, "1.30.0", Some(34981), None), - /// 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. - (accepted, panic_handler, "1.30.0", Some(44489), None), - /// Allows `#[used]` to preserve symbols (see llvm.compiler.used). - (accepted, used, "1.30.0", Some(40289), None), /// Allows `crate` in paths. (accepted, crate_in_paths, "1.30.0", Some(45477), None), + /// Allows using assigning a default type to type parameters in algebraic data type definitions. + (accepted, default_type_params, "1.0.0", None, None), + /// Allows `#[deprecated]` attribute. + (accepted, deprecated, "1.9.0", Some(29935), None), + /// Allows the use of destructuring assignments. + (accepted, destructuring_assignment, "1.59.0", Some(71126), None), + /// Allows `#[doc(alias = "...")]`. + (accepted, doc_alias, "1.48.0", Some(50146), None), + /// Allows `..` in tuple (struct) patterns. + (accepted, dotdot_in_tuple_patterns, "1.14.0", Some(33627), None), + /// Allows `..=` in patterns (RFC 1192). + (accepted, dotdoteq_in_patterns, "1.26.0", Some(28237), None), + /// Allows `Drop` types in constants (RFC 1440). + (accepted, drop_types_in_const, "1.22.0", Some(33156), None), + /// Allows using `dyn Trait` as a syntax for trait objects. + (accepted, dyn_trait, "1.27.0", Some(44662), None), + /// Allows integer match exhaustiveness checking (RFC 2591). + (accepted, exhaustive_integer_patterns, "1.33.0", Some(50907), None), + /// Allows arbitrary expressions in key-value attributes at parse time. + (accepted, extended_key_value_attributes, "1.54.0", Some(78835), None), /// Allows resolving absolute paths as paths from other crates. (accepted, extern_absolute_paths, "1.30.0", Some(44660), None), + /// Allows `extern crate foo as bar;`. This puts `bar` into extern prelude. + (accepted, extern_crate_item_prelude, "1.31.0", Some(55599), None), + /// 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 access to crate names passed via `--extern` through prelude. (accepted, extern_prelude, "1.30.0", Some(44660), None), - /// Allows parentheses in patterns. - (accepted, pattern_parentheses, "1.31.0", Some(51087), None), - /// Allows the definition of `const fn` functions. - (accepted, min_const_fn, "1.31.0", Some(53555), None), - /// Allows scoped lints. - (accepted, tool_lints, "1.31.0", Some(44690), None), + /// Allows field shorthands (`x` meaning `x: x`) in struct literal expressions. + (accepted, field_init_shorthand, "1.17.0", Some(37340), None), + /// Allows `#[must_use]` on functions, and introduces must-use operators (RFC 1940). + (accepted, fn_must_use, "1.27.0", Some(43302), None), + /// Allows capturing variables in scope using format_args! + (accepted, format_args_capture, "1.58.0", Some(67984), None), + /// Allows attributes on lifetime/type formal parameters in generics (RFC 1327). + (accepted, generic_param_attrs, "1.27.0", Some(48848), None), + /// Allows the `#[global_allocator]` attribute. + (accepted, global_allocator, "1.28.0", Some(27389), None), + // FIXME: explain `globs`. + (accepted, globs, "1.0.0", None, None), + /// Allows using the `u128` and `i128` types. + (accepted, i128_type, "1.26.0", Some(35118), None), + /// Allows the use of `if let` expressions. + (accepted, if_let, "1.0.0", None, None), + /// 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 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. - (accepted, extern_crate_item_prelude, "1.31.0", Some(55599), None), - /// 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. - (accepted, macro_at_most_once_rep, "1.32.0", Some(48075), None), - /// Allows `Self` struct constructor (RFC 2302). - (accepted, self_struct_ctor, "1.32.0", Some(51994), None), - /// 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. - (accepted, uniform_paths, "1.32.0", Some(53130), None), - /// 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 _;`. - (accepted, underscore_imports, "1.33.0", Some(48216), None), - /// Allows `#[repr(packed(N))]` attribute on structs. - (accepted, repr_packed, "1.33.0", Some(33158), None), + /// Allows using `a..=b` and `..=b` as inclusive range syntaxes. + (accepted, inclusive_range_syntax, "1.26.0", Some(28237), None), + /// Allows inferring outlives requirements (RFC 2093). + (accepted, infer_outlives_requirements, "1.30.0", Some(44493), None), /// 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. - (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. - (accepted, const_let, "1.33.0", Some(48821), None), - /// 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`. - (accepted, if_while_or_patterns, "1.33.0", Some(48215), None), - /// 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`. - (accepted, extern_crate_self, "1.34.0", Some(56409), None), - /// 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`. - (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))]`. - (accepted, repr_align_enum, "1.37.0", Some(57996), None), - /// 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. - (accepted, async_await, "1.39.0", Some(50547), None), - /// Allows mixing bind-by-move in patterns and references to those identifiers in guards. - (accepted, bind_by_move_pattern_guards, "1.39.0", Some(15287), None), - /// Allows attributes in formal function parameters. - (accepted, param_attrs, "1.39.0", Some(60406), None), + /// 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 `break {expr}` with a value inside `loop`s. + (accepted, loop_break_value, "1.19.0", Some(37339), None), + /// 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 macro attributes to observe output of `#[derive]`. + (accepted, macro_attributes_in_derive_output, "1.57.0", Some(81119), None), + /// Allows use of the `:lifetime` macro fragment specifier. + (accepted, macro_lifetime_matcher, "1.27.0", Some(34303), None), + /// Allows use of the `:literal` macro fragment specifier (RFC 1576). + (accepted, macro_literal_matcher, "1.32.0", Some(35625), None), + /// Allows `macro_rules!` items. + (accepted, macro_rules, "1.0.0", None, None), + /// Allows use of the `:vis` macro fragment specifier + (accepted, macro_vis_matcher, "1.30.0", Some(41022), None), /// Allows macro invocations in `extern {}` blocks. (accepted, macros_in_extern, "1.40.0", Some(49476), None), + /// Allows '|' at beginning of match arms (RFC 1925). + (accepted, match_beginning_vert, "1.25.0", Some(44101), None), + /// Allows default match binding modes (RFC 2005). + (accepted, match_default_bindings, "1.26.0", Some(42640), None), + /// Allows `impl Trait` with multiple unrelated lifetimes. + (accepted, member_constraints, "1.54.0", Some(61997), None), + /// Allows the definition of `const fn` functions. + (accepted, min_const_fn, "1.31.0", Some(53555), None), + /// The smallest useful subset of const generics. + (accepted, min_const_generics, "1.51.0", Some(74878), None), + /// Allows calling `const unsafe fn` inside `unsafe` blocks in `const fn` functions. + (accepted, min_const_unsafe_fn, "1.33.0", Some(55607), None), + /// Allows using `Self` and associated types in struct expressions and patterns. + (accepted, more_struct_aliases, "1.16.0", Some(37544), None), + /// Allows patterns with concurrent by-move and by-ref bindings. + /// For example, you can write `Foo(a, ref b)` where `a` is by-move and `b` is by-ref. + (accepted, move_ref_pattern, "1.49.0", Some(68354), None), + /// Allows using `#![no_std]`. + (accepted, no_std, "1.6.0", None, None), + /// Allows defining identifiers beyond ASCII. + (accepted, non_ascii_idents, "1.53.0", Some(55467), None), /// Allows future-proofing enums/structs with the `#[non_exhaustive]` attribute (RFC 2008). (accepted, non_exhaustive, "1.40.0", Some(44109), None), - /// Allows calling constructor functions in `const fn`. - (accepted, const_constructor, "1.40.0", Some(61456), None), - /// Allows the use of `#[cfg(doctest)]`, set when rustdoc is collecting doctests. - (accepted, cfg_doctest, "1.40.0", Some(62210), None), + /// Allows `foo.rs` as an alternative to `foo/mod.rs`. + (accepted, non_modrs_mods, "1.30.0", Some(44660), None), + /// Allows the use of or-patterns (e.g., `0 | 1`). + (accepted, or_patterns, "1.53.0", Some(54883), None), + /// 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 attributes in formal function parameters. + (accepted, param_attrs, "1.39.0", Some(60406), None), + /// Allows parentheses in patterns. + (accepted, pattern_parentheses, "1.31.0", Some(51087), None), + /// Allows procedural macros in `proc-macro` crates. + (accepted, proc_macro, "1.29.0", Some(38356), None), + /// Allows multi-segment paths in attributes and derives. + (accepted, proc_macro_path_invoc, "1.30.0", Some(38356), None), + /// Allows `pub(restricted)` visibilities (RFC 1422). + (accepted, pub_restricted, "1.18.0", Some(32409), None), + /// Allows use of the postfix `?` operator in expressions. + (accepted, question_mark, "1.13.0", Some(31436), None), + /// Allows keywords to be escaped for use as identifiers. + (accepted, raw_identifiers, "1.30.0", Some(48589), None), /// Allows relaxing the coherence rules such that /// `impl<T> ForeignTrait<LocalType> for ForeignType<T>` is permitted. (accepted, re_rebalance_coherence, "1.41.0", Some(55437), None), - /// Allows #[repr(transparent)] on univariant enums (RFC 2645). - (accepted, transparent_enums, "1.42.0", Some(60405), None), + /// Allows numeric fields in struct expressions and patterns. + (accepted, relaxed_adts, "1.19.0", Some(35626), None), + /// Lessens the requirements for structs to implement `Unsize`. + (accepted, relaxed_struct_unsize, "1.58.0", Some(81793), None), + /// Allows `repr(align(16))` struct attribute (RFC 1358). + (accepted, repr_align, "1.25.0", Some(33626), None), + /// 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 `#[repr(packed(N))]` attribute on structs. + (accepted, repr_packed, "1.33.0", Some(33158), None), + /// Allows `#[repr(transparent)]` attribute on newtype structs. + (accepted, repr_transparent, "1.28.0", Some(43036), None), + /// Allows code like `let x: &'static u32 = &42` to work (RFC 1414). + (accepted, rvalue_static_promotion, "1.21.0", Some(38865), None), + /// Allows `Self` in type definitions (RFC 2300). + (accepted, self_in_typedefs, "1.32.0", Some(49303), None), + /// Allows `Self` struct constructor (RFC 2302). + (accepted, self_struct_ctor, "1.32.0", Some(51994), None), /// Allows using subslice patterns, `[a, .., b]` and `[a, xs @ .., b]`. (accepted, slice_patterns, "1.42.0", Some(62254), None), - /// Allows the use of `if` and `match` in constants. - (accepted, const_if_match, "1.46.0", Some(49146), None), - /// Allows the use of `loop` and `while` in constants. - (accepted, const_loop, "1.46.0", Some(52000), None), + /// Allows use of `&foo[a..b]` as a slicing syntax. + (accepted, slicing_syntax, "1.0.0", None, None), + /// Allows elision of `'static` lifetimes in `static`s and `const`s. + (accepted, static_in_const, "1.17.0", Some(35897), None), + /// Allows the definition recursive static items. + (accepted, static_recursion, "1.17.0", Some(29719), None), + /// Allows attributes on struct literal fields. + (accepted, struct_field_attributes, "1.20.0", Some(38814), None), + /// Allows struct variants `Foo { baz: u8, .. }` in enums (RFC 418). + (accepted, struct_variant, "1.0.0", None, None), + /// Allows `#[target_feature(...)]`. + (accepted, target_feature, "1.27.0", None, None), + /// Allows `fn main()` with return types which implements `Termination` (RFC 1937). + (accepted, termination_trait, "1.26.0", Some(43301), None), + /// Allows `#[test]` functions where the return type implements `Termination` (RFC 1937). + (accepted, termination_trait_test, "1.27.0", Some(48854), None), + /// Allows attributes scoped to tools. + (accepted, tool_attributes, "1.30.0", Some(44690), None), + /// Allows scoped lints. + (accepted, tool_lints, "1.31.0", Some(44690), None), /// Allows `#[track_caller]` to be used which provides /// accurate caller location reporting during panic (RFC 2091). (accepted, track_caller, "1.46.0", Some(47809), None), - /// Allows `#[doc(alias = "...")]`. - (accepted, doc_alias, "1.48.0", Some(50146), None), - /// Allows patterns with concurrent by-move and by-ref bindings. - /// For example, you can write `Foo(a, ref b)` where `a` is by-move and `b` is by-ref. - (accepted, move_ref_pattern, "1.49.0", Some(68354), None), - /// The smallest useful subset of const generics. - (accepted, min_const_generics, "1.51.0", Some(74878), None), + /// Allows #[repr(transparent)] on univariant enums (RFC 2645). + (accepted, transparent_enums, "1.42.0", Some(60405), None), + /// Allows indexing tuples. + (accepted, tuple_indexing, "1.0.0", None, None), + /// Allows paths to enum variants on type aliases including `Self`. + (accepted, type_alias_enum_variants, "1.37.0", Some(49683), None), + /// Allows macros to appear in the type position. + (accepted, type_macros, "1.13.0", Some(27245), None), + /// Allows `const _: TYPE = VALUE`. + (accepted, underscore_const_names, "1.37.0", Some(54912), None), + /// Allows `use path as _;` and `extern crate c as _;`. + (accepted, underscore_imports, "1.33.0", Some(48216), None), + /// Allows `'_` placeholder lifetimes. + (accepted, underscore_lifetimes, "1.26.0", Some(44524), None), + /// Allows `use x::y;` to search `x` in the current scope. + (accepted, uniform_paths, "1.32.0", Some(53130), None), + /// Allows `impl Trait` in function arguments. + (accepted, universal_impl_trait, "1.26.0", Some(34511), None), + /// Allows arbitrary delimited token streams in non-macro attributes. + (accepted, unrestricted_attribute_tokens, "1.34.0", Some(55208), None), /// The `unsafe_op_in_unsafe_fn` lint (allowed by default): no longer treat an unsafe function as an unsafe block. (accepted, unsafe_block_in_unsafe_fn, "1.52.0", Some(71668), None), - /// Allows the use of or-patterns (e.g., `0 | 1`). - (accepted, or_patterns, "1.53.0", Some(54883), None), - /// Allows defining identifiers beyond ASCII. - (accepted, non_ascii_idents, "1.53.0", Some(55467), None), - /// Allows arbitrary expressions in key-value attributes at parse time. - (accepted, extended_key_value_attributes, "1.54.0", Some(78835), None), - /// Allows unsizing coercions in `const fn`. - (accepted, const_fn_unsize, "1.54.0", Some(64992), None), - /// Allows `impl Trait` with multiple unrelated lifetimes. - (accepted, member_constraints, "1.54.0", Some(61997), None), - /// Allows bindings in the subpattern of a binding pattern. - /// For example, you can write `x @ Some(y)`. - (accepted, bindings_after_at, "1.56.0", Some(65490), None), - /// Allows calling `transmute` in const fn - (accepted, const_fn_transmute, "1.56.0", Some(53605), None), - /// Allows accessing fields of unions inside `const` functions. - (accepted, const_fn_union, "1.56.0", Some(51909), None), - /// Allows macro attributes to observe output of `#[derive]`. - (accepted, macro_attributes_in_derive_output, "1.57.0", Some(81119), None), - /// Allows panicking during const eval (producing compile-time errors). - (accepted, const_panic, "1.57.0", Some(51999), None), - /// Lessens the requirements for structs to implement `Unsize`. - (accepted, relaxed_struct_unsize, "1.58.0", Some(81793), None), + /// Allows importing and reexporting macros with `use`, + /// enables macro modularization in general. + (accepted, use_extern_macros, "1.30.0", Some(35896), None), + /// Allows nested groups in `use` items (RFC 2128). + (accepted, use_nested_groups, "1.25.0", Some(44494), None), + /// Allows `#[used]` to preserve symbols (see llvm.compiler.used). + (accepted, used, "1.30.0", Some(40289), None), + /// Allows the use of `while let` expressions. + (accepted, while_let, "1.0.0", None, None), + /// Allows `#![windows_subsystem]`. + (accepted, windows_subsystem, "1.18.0", Some(37499), None), + // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! + // Features are listed in alphabetical order. Tidy will fail if you don't keep it this way. + // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! // ------------------------------------------------------------------------- // feature-group-end: accepted features diff --git a/compiler/rustc_feature/src/active.rs b/compiler/rustc_feature/src/active.rs index 1c6f1344e8a..0b65a5ff3ec 100644 --- a/compiler/rustc_feature/src/active.rs +++ b/compiler/rustc_feature/src/active.rs @@ -69,10 +69,6 @@ macro_rules! declare_features { } } - pub fn unordered_const_ty_params(&self) -> bool { - self.const_generics_defaults || self.generic_const_exprs || self.adt_const_params - } - /// Some features are known to be incomplete and using them is likely to have /// unanticipated results, such as compiler crashes. We warn the user about these /// to alert them. @@ -122,130 +118,103 @@ impl Feature { #[rustfmt::skip] declare_features! ( // ------------------------------------------------------------------------- - // feature-group-start: internal feature gates + // feature-group-start: internal feature gates (no tracking issue) // ------------------------------------------------------------------------- - // no-tracking-issue-start - /// Allows using `rustc_*` attributes (RFC 572). - (active, rustc_attrs, "1.0.0", None, None), - - /// Allows using compiler's own crates. - (active, rustc_private, "1.0.0", Some(27812), None), - - /// 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. - (active, lang_items, "1.0.0", None, None), - - /// Allows using the `#[stable]` and `#[unstable]` attributes. - (active, staged_api, "1.0.0", None, None), - - /// Allows using `#[allow_internal_unstable]`. This is an + /// Allows using the `thiscall` ABI. + (active, abi_thiscall, "1.19.0", None, None), + /// Allows using the `unadjusted` ABI; perma-unstable. + (active, abi_unadjusted, "1.16.0", None, None), + /// Allows using the `vectorcall` ABI. + (active, abi_vectorcall, "1.7.0", None, None), + /// Allows using `#![needs_allocator]`, an implementation detail of `#[global_allocator]`. + (active, allocator_internals, "1.20.0", 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). - (active, allow_internal_unstable, "1.0.0", None, None), - - /// Allows using `#[allow_internal_unsafe]`. This is an + (active, allow_internal_unsafe, "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). - (active, allow_internal_unsafe, "1.0.0", None, None), - - /// no-tracking-issue-end - - /// Allows using `#[link_name="llvm.*"]`. - (active, link_llvm_intrinsics, "1.0.0", Some(29602), None), - - /// Allows using the `box $expr` syntax. - (active, box_syntax, "1.0.0", Some(49733), None), - - /// 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. - (active, fundamental, "1.0.0", Some(29635), None), - - /// Allows using the `rust-call` ABI. - (active, unboxed_closures, "1.0.0", Some(29625), None), - - /// Allows using the `#[linkage = ".."]` attribute. - (active, linkage, "1.0.0", Some(29603), None), - - /// 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. - (active, prelude_import, "1.2.0", None, None), - - // no-tracking-issue-end - - // no-tracking-issue-start - - /// Allows using `#[omit_gdb_pretty_printer_section]`. - (active, omit_gdb_pretty_printer_section, "1.5.0", None, None), - - /// 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. - /// FIXME: Subsumed by trait `StructuralPartialEq`, cannot move to removed until a library - /// feature with the same name exists. - (active, structural_match, "1.8.0", Some(31434), None), - - /// Allows using the `may_dangle` attribute (RFC 1327). - (active, dropck_eyepatch, "1.10.0", Some(34761), None), - - /// 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. - (active, needs_panic_runtime, "1.10.0", Some(32837), None), - - // no-tracking-issue-start - + (active, allow_internal_unstable, "1.0.0", None, None), /// Allows identifying the `compiler_builtins` crate. (active, compiler_builtins, "1.13.0", None, None), - - /// Allows using the `unadjusted` ABI; perma-unstable. - (active, abi_unadjusted, "1.16.0", None, None), - + /// 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. + (active, lang_items, "1.0.0", None, None), + /// Allows `#[repr(no_niche)]` (an implementation detail of `rustc`, + /// it is not on path for eventual stabilization). + (active, no_niche, "1.42.0", None, None), + /// Allows using `#[omit_gdb_pretty_printer_section]`. + (active, omit_gdb_pretty_printer_section, "1.5.0", None, None), + /// Allows using `#[prelude_import]` on glob `use` items. + (active, prelude_import, "1.2.0", None, None), /// Used to identify crates that contain the profiler runtime. (active, profiler_runtime, "1.18.0", None, None), - - /// Allows using the `thiscall` ABI. - (active, abi_thiscall, "1.19.0", None, None), - - /// Allows using `#![needs_allocator]`, an implementation detail of `#[global_allocator]`. - (active, allocator_internals, "1.20.0", None, None), - + /// Allows using `rustc_*` attributes (RFC 572). + (active, rustc_attrs, "1.0.0", None, None), + /// Allows using the `#[stable]` and `#[unstable]` attributes. + (active, staged_api, "1.0.0", None, None), /// Added for testing E0705; perma-unstable. (active, test_2018_feature, "1.31.0", None, Some(Edition::Edition2018)), + // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! + // Features are listed in alphabetical order. Tidy will fail if you don't keep it this way. + // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! - /// Allows `#[repr(no_niche)]` (an implementation detail of `rustc`, - /// it is not on path for eventual stabilization). - (active, no_niche, "1.42.0", None, None), + // no-tracking-issue-end + // ------------------------------------------------------------------------- + // feature-group-end: internal feature gates (no tracking issue) + // ------------------------------------------------------------------------- - /// Allows using `#[rustc_allow_const_fn_unstable]`. - /// This is an attribute on `const fn` for the same - /// purpose as `#[allow_internal_unstable]`. - (active, rustc_allow_const_fn_unstable, "1.49.0", Some(69399), None), + // ------------------------------------------------------------------------- + // feature-group-start: internal feature gates + // ------------------------------------------------------------------------- /// Allows features specific to auto traits. /// Renamed from `optin_builtin_traits`. (active, auto_traits, "1.50.0", Some(13231), None), - + /// Allows using `box` in patterns (RFC 469). + (active, box_patterns, "1.0.0", Some(29641), None), + /// Allows using the `box $expr` syntax. + (active, box_syntax, "1.0.0", Some(49733), None), /// Allows `#[doc(notable_trait)]`. /// Renamed from `doc_spotlight`. (active, doc_notable_trait, "1.52.0", Some(45040), None), - - // no-tracking-issue-end + /// Allows using the `may_dangle` attribute (RFC 1327). + (active, dropck_eyepatch, "1.10.0", Some(34761), None), + /// Allows using the `#[fundamental]` attribute. + (active, fundamental, "1.0.0", Some(29635), None), + /// Allows using `#[link_name="llvm.*"]`. + (active, link_llvm_intrinsics, "1.0.0", Some(29602), None), + /// Allows using the `#[linkage = ".."]` attribute. + (active, linkage, "1.0.0", Some(29603), None), + /// Allows declaring with `#![needs_panic_runtime]` that a panic runtime is needed. + (active, needs_panic_runtime, "1.10.0", Some(32837), None), + /// Allows using the `#![panic_runtime]` attribute. + (active, panic_runtime, "1.10.0", Some(32837), None), + /// Allows using `#[rustc_allow_const_fn_unstable]`. + /// This is an attribute on `const fn` for the same + /// purpose as `#[allow_internal_unstable]`. + (active, rustc_allow_const_fn_unstable, "1.49.0", Some(69399), None), + /// Allows using compiler's own crates. + (active, rustc_private, "1.0.0", Some(27812), None), + /// Allows using internal rustdoc features like `doc(primitive)` or `doc(keyword)`. + (active, rustdoc_internals, "1.58.0", Some(90418), None), + /// Allows using `#[start]` on a function indicating that it is the program entrypoint. + (active, start, "1.0.0", Some(29633), None), + /// Allows using `#[structural_match]` which indicates that a type is structurally matchable. + /// FIXME: Subsumed by trait `StructuralPartialEq`, cannot move to removed until a library + /// feature with the same name exists. + (active, structural_match, "1.8.0", Some(31434), None), + /// Allows using the `rust-call` ABI. + (active, unboxed_closures, "1.0.0", Some(29625), None), + // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! + // Features are listed in alphabetical order. Tidy will fail if you don't keep it this way. + // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! // ------------------------------------------------------------------------- // feature-group-end: internal feature gates @@ -258,23 +227,26 @@ declare_features! ( // FIXME: Document these and merge with the list below. // Unstable `#[target_feature]` directives. - (active, arm_target_feature, "1.27.0", Some(44839), None), (active, aarch64_target_feature, "1.27.0", Some(44839), None), + (active, adx_target_feature, "1.32.0", Some(44839), None), + (active, arm_target_feature, "1.27.0", Some(44839), None), + (active, avx512_target_feature, "1.27.0", Some(44839), None), + (active, bpf_target_feature, "1.54.0", Some(44839), None), + (active, cmpxchg16b_target_feature, "1.32.0", Some(44839), None), + (active, ermsb_target_feature, "1.49.0", Some(44839), None), + (active, f16c_target_feature, "1.36.0", Some(44839), None), (active, hexagon_target_feature, "1.27.0", Some(44839), None), - (active, powerpc_target_feature, "1.27.0", Some(44839), None), (active, mips_target_feature, "1.27.0", Some(44839), None), - (active, avx512_target_feature, "1.27.0", Some(44839), None), + (active, movbe_target_feature, "1.34.0", Some(44839), None), + (active, powerpc_target_feature, "1.27.0", Some(44839), None), + (active, riscv_target_feature, "1.45.0", Some(44839), None), + (active, rtm_target_feature, "1.35.0", Some(44839), None), (active, sse4a_target_feature, "1.27.0", Some(44839), None), (active, tbm_target_feature, "1.27.0", Some(44839), None), (active, wasm_target_feature, "1.30.0", Some(44839), None), - (active, adx_target_feature, "1.32.0", Some(44839), None), - (active, cmpxchg16b_target_feature, "1.32.0", Some(44839), None), - (active, movbe_target_feature, "1.34.0", Some(44839), None), - (active, rtm_target_feature, "1.35.0", Some(44839), None), - (active, f16c_target_feature, "1.36.0", Some(44839), None), - (active, riscv_target_feature, "1.45.0", Some(44839), None), - (active, ermsb_target_feature, "1.49.0", Some(44839), None), - (active, bpf_target_feature, "1.54.0", Some(44839), None), + // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! + // Features are listed in alphabetical order. Tidy will fail if you don't keep it this way. + // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! // ------------------------------------------------------------------------- // feature-group-end: actual feature gates (target features) @@ -284,413 +256,285 @@ declare_features! ( // feature-group-start: actual feature gates // ------------------------------------------------------------------------- - /// Allows using `#![plugin(myplugin)]`. - (active, plugin, "1.0.0", Some(29597), None), - - /// 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. - (active, simd_ffi, "1.0.0", Some(27731), None), - - /// Allows using non lexical lifetimes (RFC 2094). - (active, nll, "1.0.0", Some(43234), None), - - /// Allows associated type defaults. - (active, associated_type_defaults, "1.2.0", Some(29661), None), - - /// Allows `#![no_core]`. - (active, no_core, "1.3.0", Some(29639), None), - - /// 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. - (active, repr_simd, "1.4.0", Some(27731), None), - - /// Allows `extern "platform-intrinsic" { ... }`. - (active, platform_intrinsics, "1.4.0", Some(27731), None), - - /// 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. - (active, type_ascription, "1.6.0", Some(23416), None), - - /// Allows `cfg(target_thread_local)`. - (active, cfg_target_thread_local, "1.7.0", Some(29594), None), - - /// Allows specialization of implementations (RFC 1210). - (incomplete, specialization, "1.7.0", Some(31844), None), - - /// A minimal, sound subset of specialization intended to be used by the - /// standard library until the soundness issues with specialization - /// are fixed. - (active, min_specialization, "1.7.0", Some(31844), None), - - /// Allows using `#[naked]` on functions. - (active, naked_functions, "1.9.0", Some(32408), None), - - /// Allows `cfg(target_has_atomic = "...")`. - (active, cfg_target_has_atomic, "1.9.0", Some(32976), None), - - /// 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. - (active, never_type, "1.13.0", Some(35121), None), - - /// Allows exhaustive pattern matching on types that contain uninhabited types. - (active, exhaustive_patterns, "1.13.0", Some(51085), None), - - /// Allows `union`s to implement `Drop`. Moreover, `union`s may now include fields - /// that don't implement `Copy` as long as they don't have any drop glue. - /// This is checked recursively. On encountering type variable where no progress can be made, - /// `T: Copy` is used as a substitute for "no drop glue". - /// - /// NOTE: A limited form of `union U { ... }` was accepted in 1.19.0. - (active, untagged_unions, "1.13.0", Some(55149), None), - - /// Allows `#[link(..., cfg(..))]`. - (active, link_cfg, "1.14.0", Some(37406), None), - - /// Allows `extern "ptx-*" fn()`. - (active, abi_ptx, "1.15.0", Some(38788), None), - - /// Allows the `#[repr(i128)]` attribute for enums. - (incomplete, repr128, "1.16.0", Some(56071), None), - - /// Allows `#[link(kind="static-nobundle"...)]`. - (active, static_nobundle, "1.16.0", Some(37403), None), - + /// Allows using the `amdgpu-kernel` ABI. + (active, abi_amdgpu_kernel, "1.29.0", Some(51575), None), + /// Allows `extern "avr-interrupt" fn()` and `extern "avr-non-blocking-interrupt" fn()`. + (active, abi_avr_interrupt, "1.45.0", Some(69664), None), + /// Allows `extern "C-cmse-nonsecure-call" fn()`. + (active, abi_c_cmse_nonsecure_call, "1.51.0", Some(81391), None), + /// Allows using the `efiapi` ABI. + (active, abi_efiapi, "1.40.0", Some(65815), None), /// Allows `extern "msp430-interrupt" fn()`. (active, abi_msp430_interrupt, "1.16.0", Some(38487), None), - - /// Allows declarative macros 2.0 (`macro`). - (active, decl_macro, "1.17.0", Some(39412), None), - + /// Allows `extern "ptx-*" fn()`. + (active, abi_ptx, "1.15.0", Some(38788), None), /// Allows `extern "x86-interrupt" fn()`. (active, abi_x86_interrupt, "1.17.0", Some(40180), None), - + /// Allows additional const parameter types, such as `&'static str` or user defined types + (incomplete, adt_const_params, "1.56.0", Some(44580), None), + /// Allows defining an `#[alloc_error_handler]`. + (active, alloc_error_handler, "1.29.0", Some(51540), None), /// Allows a test to fail without failing the whole suite. (active, allow_fail, "1.19.0", Some(46488), None), - - /// Allows unsized tuple coercion. - (active, unsized_tuple_coercion, "1.20.0", Some(42877), None), - - /// Allows defining generators. - (active, generators, "1.21.0", Some(43122), None), - - /// Allows `#[doc(cfg(...))]`. - (active, doc_cfg, "1.21.0", Some(43781), None), - - /// Allows `#[doc(masked)]`. - (active, doc_masked, "1.21.0", Some(44027), None), - - /// 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. - (active, extern_types, "1.23.0", Some(43467), None), - + /// Allows explicit discriminants on non-unit enum variants. + (active, arbitrary_enum_discriminant, "1.37.0", Some(60553), None), /// 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`). - (active, in_band_lifetimes, "1.23.0", Some(44524), None), - - /// 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. - (active, trait_alias, "1.24.0", Some(41517), None), - - /// Allows inferring `'static` outlives requirements (RFC 2093). - (active, infer_static_outlives_requirements, "1.26.0", Some(54185), None), - - /// Allows dereferencing raw pointers during const eval. - (active, const_raw_ptr_deref, "1.27.0", Some(51911), None), - - /// Allows inconsistent bounds in where clauses. - (active, trivial_bounds, "1.28.0", Some(48214), None), - - /// Allows `'a: { break 'a; }`. - (active, label_break_value, "1.28.0", Some(48594), None), - - /// Allows using `#[doc(keyword = "...")]`. - (active, doc_keyword, "1.28.0", Some(51315), None), - - /// Allows using `try {...}` expressions. - (active, try_blocks, "1.29.0", Some(31436), None), - - /// Allows defining an `#[alloc_error_handler]`. - (active, alloc_error_handler, "1.29.0", Some(51540), None), - - /// Allows using the `amdgpu-kernel` ABI. - (active, abi_amdgpu_kernel, "1.29.0", Some(51575), None), - - /// Allows `#[marker]` on certain traits allowing overlapping implementations. - (active, marker_trait_attr, "1.30.0", Some(29864), None), - - /// Allows macro attributes on expressions, statements and non-inline modules. - (active, proc_macro_hygiene, "1.30.0", Some(54727), None), - - /// Allows unsized rvalues at arguments and parameters. - (incomplete, unsized_locals, "1.30.0", Some(48055), None), - - /// 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. - (active, custom_inner_attributes, "1.30.0", Some(54726), None), - - /// 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`. - (active, precise_pointer_size_matching, "1.32.0", Some(56354), None), - - /// Allows using `#[ffi_returns_twice]` on foreign functions. - (active, ffi_returns_twice, "1.34.0", Some(58314), None), - - /// Allows using `#[optimize(X)]`. - (active, optimize_attribute, "1.34.0", Some(54882), None), - - /// Allows using C-variadics. - (active, c_variadic, "1.34.0", Some(44930), None), - + /// Allows using `const` operands in inline assembly. + (active, asm_const, "1.58.0", Some(72016), None), + /// Enables experimental inline assembly support for additional architectures. + (active, asm_experimental_arch, "1.58.0", Some(72016), None), + /// Allows using `sym` operands in inline assembly. + (active, asm_sym, "1.58.0", Some(72016), None), + /// Allows the `may_unwind` option in inline assembly. + (active, asm_unwind, "1.58.0", Some(72016), None), + /// Allows users to enforce equality of associated constants `TraitImpl<AssocConst=3>`. + (active, associated_const_equality, "1.58.0", Some(92827), None), /// Allows the user of associated type bounds. (active, associated_type_bounds, "1.34.0", Some(52662), None), - - /// Allows `if/while p && let q = r && ...` chains. - (incomplete, let_chains, "1.37.0", Some(53667), None), - - /// Allows #[repr(transparent)] on unions (RFC 2645). - (active, transparent_unions, "1.37.0", Some(60405), None), - - /// Allows explicit discriminants on non-unit enum variants. - (active, arbitrary_enum_discriminant, "1.37.0", Some(60553), None), - + /// Allows associated type defaults. + (active, associated_type_defaults, "1.2.0", Some(29661), None), /// Allows `async || body` closures. (active, async_closure, "1.37.0", Some(62290), None), - - /// Allows `impl Trait` to be used inside type aliases (RFC 2515). - (active, type_alias_impl_trait, "1.38.0", Some(63063), None), - - /// Allows the definition of `const extern fn` and `const unsafe extern fn`. - (active, const_extern_fn, "1.40.0", Some(64926), None), - - /// Allows the use of raw-dylibs (RFC 2627). - (incomplete, raw_dylib, "1.40.0", Some(58713), None), - - /// Allows making `dyn Trait` well-formed even if `Trait` is not object safe. - /// In that case, `dyn Trait: Trait` does not hold. Moreover, coercions and - /// casts in safe Rust to `dyn Trait` for such a `Trait` is also forbidden. - (active, object_safe_for_dispatch, "1.40.0", Some(43561), None), - - /// Allows using the `efiapi` ABI. - (active, abi_efiapi, "1.40.0", Some(65815), None), - - /// Allows `&raw const $place_expr` and `&raw mut $place_expr` expressions. - (active, raw_ref_op, "1.41.0", Some(64490), None), - - /// Allows diverging expressions to fall back to `!` rather than `()`. - (active, never_type_fallback, "1.41.0", Some(65992), None), - - /// Allows using the `#[register_attr]` attribute. - (active, register_attr, "1.41.0", Some(66080), None), - - /// Allows using the `#[register_tool]` attribute. - (active, register_tool, "1.41.0", Some(66079), None), - + /// Allows `extern "C-unwind" fn` to enable unwinding across ABI boundaries. + (active, c_unwind, "1.52.0", Some(74990), None), + /// Allows using C-variadics. + (active, c_variadic, "1.34.0", Some(44930), None), + /// Allows capturing disjoint fields in a closure/generator (RFC 2229). + (incomplete, capture_disjoint_fields, "1.49.0", Some(53488), None), + /// Enables `#[cfg(panic = "...")]` config key. + (active, cfg_panic, "1.49.0", Some(77443), None), /// Allows the use of `#[cfg(sanitize = "option")]`; set when -Zsanitizer is used. (active, cfg_sanitize, "1.41.0", Some(39699), None), - - /// Allows using `..X`, `..=X`, `...X`, and `X..` as a pattern. - (active, half_open_range_patterns, "1.41.0", Some(67264), None), - - /// Allows using `&mut` in constant functions. - (active, const_mut_refs, "1.41.0", Some(57349), None), - - /// Allows `impl const Trait for T` syntax. - (active, const_trait_impl, "1.42.0", Some(67792), None), - - /// Allows the use of `no_sanitize` attribute. - (active, no_sanitize, "1.42.0", Some(39699), None), - - // Allows limiting the evaluation steps of const expressions - (active, const_eval_limit, "1.43.0", Some(67217), None), - - /// Allow negative trait implementations. - (active, negative_impls, "1.44.0", Some(68318), None), - - /// Allows the use of `#[target_feature]` on safe functions. - (active, target_feature_11, "1.45.0", Some(69098), None), - + /// Allows `cfg(target_abi = "...")`. + (active, cfg_target_abi, "1.55.0", Some(80970), None), + /// Allows `cfg(target_has_atomic = "...")`. + (active, cfg_target_has_atomic, "1.9.0", Some(32976), None), + /// Allows `cfg(target_thread_local)`. + (active, cfg_target_thread_local, "1.7.0", Some(29594), None), /// Allow conditional compilation depending on rust version (active, cfg_version, "1.45.0", Some(64796), None), - - /// Allows the use of `#[ffi_pure]` on foreign functions. - (active, ffi_pure, "1.45.0", Some(58329), None), - - /// Allows the use of `#[ffi_const]` on foreign functions. - (active, ffi_const, "1.45.0", Some(58328), None), - - /// Allows `extern "avr-interrupt" fn()` and `extern "avr-non-blocking-interrupt" fn()`. - (active, abi_avr_interrupt, "1.45.0", Some(69664), None), - - /// Be more precise when looking for live drops in a const context. - (active, const_precise_live_drops, "1.46.0", Some(73255), None), - - /// Allows capturing variables in scope using format_args! - (active, format_args_capture, "1.46.0", Some(67984), None), - - /// Allows `if let` guard in match arms. - (active, if_let_guard, "1.47.0", Some(51114), None), - + /// Allows `#[track_caller]` on closures and generators. + (active, closure_track_caller, "1.57.0", Some(87417), None), + /// Allows to use the `#[cmse_nonsecure_entry]` attribute. + (active, cmse_nonsecure_entry, "1.48.0", Some(75835), None), + /// Allows `async {}` expressions in const contexts. + (active, const_async_blocks, "1.53.0", Some(85368), None), + // Allows limiting the evaluation steps of const expressions + (active, const_eval_limit, "1.43.0", Some(67217), None), + /// Allows the definition of `const extern fn` and `const unsafe extern fn`. + (active, const_extern_fn, "1.40.0", Some(64926), None), /// Allows basic arithmetic on floating point types in a `const fn`. (active, const_fn_floating_point_arithmetic, "1.48.0", Some(57241), None), - /// Allows using and casting function pointers in a `const fn`. (active, const_fn_fn_ptr_basics, "1.48.0", Some(57563), None), - - /// Allows to use the `#[cmse_nonsecure_entry]` attribute. - (active, cmse_nonsecure_entry, "1.48.0", Some(75835), None), - - /// Allows rustc to inject a default alloc_error_handler - (active, default_alloc_error_handler, "1.48.0", Some(66741), None), - + /// Allows trait bounds in `const fn`. + (active, const_fn_trait_bound, "1.53.0", Some(57563), None), + /// Allows `for _ in _` loops in const contexts. + (active, const_for, "1.56.0", Some(87575), None), /// Allows argument and return position `impl Trait` in a `const fn`. (active, const_impl_trait, "1.48.0", Some(77463), None), - - /// Allows `#[instruction_set(_)]` attribute - (active, isa_attribute, "1.48.0", Some(74727), None), - - /// Allow anonymous constants from an inline `const` block - (incomplete, inline_const, "1.49.0", Some(76001), None), - - /// Allows unsized fn parameters. - (active, unsized_fn_params, "1.49.0", Some(48055), None), - - /// Allows the use of destructuring assignments. - (active, destructuring_assignment, "1.49.0", Some(71126), None), - - /// Enables `#[cfg(panic = "...")]` config key. - (active, cfg_panic, "1.49.0", Some(77443), None), - - /// Allows capturing disjoint fields in a closure/generator (RFC 2229). - (incomplete, capture_disjoint_fields, "1.49.0", Some(53488), None), - - /// Allows const generics to have default values (e.g. `struct Foo<const N: usize = 3>(...);`). - (active, const_generics_defaults, "1.51.0", Some(44580), None), - + /// Allows using `&mut` in constant functions. + (active, const_mut_refs, "1.41.0", Some(57349), None), + /// Be more precise when looking for live drops in a const context. + (active, const_precise_live_drops, "1.46.0", Some(73255), None), /// Allows references to types with interior mutability within constants (active, const_refs_to_cell, "1.51.0", Some(80384), None), - - /// Allows using `pointer` and `reference` in intra-doc links - (active, intra_doc_pointers, "1.51.0", Some(80896), None), - - /// Allows `extern "C-cmse-nonsecure-call" fn()`. - (active, abi_c_cmse_nonsecure_call, "1.51.0", Some(81391), None), - - /// Allows associated types in inherent impls. - (incomplete, inherent_associated_types, "1.52.0", Some(8995), None), - - // Allows setting the threshold for the `large_assignments` lint. - (active, large_assignments, "1.52.0", Some(83518), None), - - /// Allows `extern "C-unwind" fn` to enable unwinding across ABI boundaries. - (active, c_unwind, "1.52.0", Some(74990), None), - + /// Allows `impl const Trait for T` syntax. + (active, const_trait_impl, "1.42.0", Some(67792), None), + /// Allows the `?` operator in const contexts. + (active, const_try, "1.56.0", Some(74935), None), + /// Allows using `crate` as visibility modifier, synonymous with `pub(crate)`. + (active, crate_visibility_modifier, "1.23.0", Some(53120), None), + /// Allows non-builtin attributes in inner attribute position. + (active, custom_inner_attributes, "1.30.0", Some(54726), None), + /// Allows custom test frameworks with `#![test_runner]` and `#[test_case]`. + (active, custom_test_frameworks, "1.30.0", Some(50297), None), + /// Allows declarative macros 2.0 (`macro`). + (active, decl_macro, "1.17.0", Some(39412), None), + /// Allows rustc to inject a default alloc_error_handler + (active, default_alloc_error_handler, "1.48.0", Some(66741), None), + /// Allows default type parameters to influence type inference. + (active, default_type_parameter_fallback, "1.3.0", Some(27336), None), + /// Allows `#[derive(Default)]` and `#[default]` on enums. + (active, derive_default_enum, "1.56.0", Some(86985), None), + /// Tells rustdoc to automatically generate `#[doc(cfg(...))]`. + (active, doc_auto_cfg, "1.58.0", Some(43781), None), + /// Allows `#[doc(cfg(...))]`. + (active, doc_cfg, "1.21.0", Some(43781), None), + /// Allows `#[doc(cfg_hide(...))]`. + (active, doc_cfg_hide, "1.57.0", Some(43781), None), + /// Allows `#[doc(masked)]`. + (active, doc_masked, "1.21.0", Some(44027), None), + /// Allows `X..Y` patterns. + (active, exclusive_range_pattern, "1.11.0", Some(37854), None), + /// Allows exhaustive pattern matching on types that contain uninhabited types. + (active, exhaustive_patterns, "1.13.0", Some(51085), None), + /// Allows explicit generic arguments specification with `impl Trait` present. + (active, explicit_generic_args_with_impl_trait, "1.56.0", Some(83701), None), + /// Allows defining `extern type`s. + (active, extern_types, "1.23.0", Some(43467), None), + /// Allows the use of `#[ffi_const]` on foreign functions. + (active, ffi_const, "1.45.0", Some(58328), None), + /// Allows the use of `#[ffi_pure]` on foreign functions. + (active, ffi_pure, "1.45.0", Some(58329), None), + /// Allows using `#[ffi_returns_twice]` on foreign functions. + (active, ffi_returns_twice, "1.34.0", Some(58314), None), /// Allows using `#[repr(align(...))]` on function items (active, fn_align, "1.53.0", Some(82232), None), - - /// Allows `extern "wasm" fn` - (active, wasm_abi, "1.53.0", Some(83788), None), - - /// Allows function attribute `#[no_coverage]`, to bypass coverage - /// instrumentation of that function. - (active, no_coverage, "1.53.0", Some(84605), None), - - /// Allows trait bounds in `const fn`. - (active, const_fn_trait_bound, "1.53.0", Some(57563), None), - - /// Allows `async {}` expressions in const contexts. - (active, const_async_blocks, "1.53.0", Some(85368), None), - + /// Allows defining generators. + (active, generators, "1.21.0", Some(43122), None), + /// Infer generic args for both consts and types. + (active, generic_arg_infer, "1.55.0", Some(85077), None), + /// Allows associated types to be generic, e.g., `type Foo<T>;` (RFC 1598). + (active, generic_associated_types, "1.23.0", Some(44265), None), + /// Allows non-trivial generic constants which have to have wfness manually propagated to callers + (incomplete, generic_const_exprs, "1.56.0", Some(76560), None), + /// Allows using `..X`, `..=X`, `...X`, and `X..` as a pattern. + (active, half_open_range_patterns, "1.41.0", Some(67264), None), + /// Allows `if let` guard in match arms. + (active, if_let_guard, "1.47.0", Some(51114), None), /// Allows using imported `main` function (active, imported_main, "1.53.0", Some(28937), None), - + /// 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 inferring `'static` outlives requirements (RFC 2093). + (active, infer_static_outlives_requirements, "1.26.0", Some(54185), None), + /// Allows associated types in inherent impls. + (incomplete, inherent_associated_types, "1.52.0", Some(8995), None), + /// Allow anonymous constants from an inline `const` block + (active, inline_const, "1.49.0", Some(76001), None), + /// Allow anonymous constants from an inline `const` block in pattern position + (incomplete, inline_const_pat, "1.58.0", Some(76001), None), + /// Allows using `pointer` and `reference` in intra-doc links + (active, intra_doc_pointers, "1.51.0", Some(80896), None), + /// Allows `#[instruction_set(_)]` attribute + (active, isa_attribute, "1.48.0", Some(74727), None), + /// Allows `'a: { break 'a; }`. + (active, label_break_value, "1.28.0", Some(48594), None), + // Allows setting the threshold for the `large_assignments` lint. + (active, large_assignments, "1.52.0", Some(83518), None), + /// Allows `if/while p && let q = r && ...` chains. + (active, let_chains, "1.37.0", Some(53667), None), + /// Allows `let...else` statements. + (active, let_else, "1.56.0", Some(87335), None), + /// Allows `#[link(..., cfg(..))]`. + (active, link_cfg, "1.14.0", Some(37406), None), + /// Allows using `reason` in lint attributes and the `#[expect(lint)]` lint check. + (active, lint_reasons, "1.31.0", Some(54503), None), + /// Allows `#[marker]` on certain traits allowing overlapping implementations. + (active, marker_trait_attr, "1.30.0", Some(29864), None), + /// A minimal, sound subset of specialization intended to be used by the + /// standard library until the soundness issues with specialization + /// are fixed. + (active, min_specialization, "1.7.0", Some(31844), None), + /// Allows qualified paths in struct expressions, struct patterns and tuple struct patterns. + (active, more_qualified_paths, "1.54.0", Some(86935), None), + /// Allows the `#[must_not_suspend]` attribute. + (active, must_not_suspend, "1.57.0", Some(83310), None), + /// Allows using `#[naked]` on functions. + (active, naked_functions, "1.9.0", Some(32408), None), /// Allows specifying modifiers in the link attribute: `#[link(modifiers = "...")]` (active, native_link_modifiers, "1.53.0", Some(81490), None), - + /// Allows specifying the as-needed link modifier + (active, native_link_modifiers_as_needed, "1.53.0", Some(81490), None), /// Allows specifying the bundle link modifier (active, native_link_modifiers_bundle, "1.53.0", Some(81490), None), - /// Allows specifying the verbatim link modifier (active, native_link_modifiers_verbatim, "1.53.0", Some(81490), None), - /// Allows specifying the whole-archive link modifier (active, native_link_modifiers_whole_archive, "1.53.0", Some(81490), None), - - /// Allows specifying the as-needed link modifier - (active, native_link_modifiers_as_needed, "1.53.0", Some(81490), None), - - /// Allows qualified paths in struct expressions, struct patterns and tuple struct patterns. - (active, more_qualified_paths, "1.54.0", Some(86935), None), - - /// Allows `cfg(target_abi = "...")`. - (active, cfg_target_abi, "1.55.0", Some(80970), None), - - /// Infer generic args for both consts and types. - (active, generic_arg_infer, "1.55.0", Some(85077), None), - - /// Allows `#[derive(Default)]` and `#[default]` on enums. - (active, derive_default_enum, "1.56.0", Some(86985), None), - - /// Allows `for _ in _` loops in const contexts. - (active, const_for, "1.56.0", Some(87575), None), - - /// Allows the `?` operator in const contexts. - (active, const_try, "1.56.0", Some(74935), None), - + /// Allow negative trait implementations. + (active, negative_impls, "1.44.0", Some(68318), None), + /// Allows the `!` type. Does not imply 'exhaustive_patterns' (below) any more. + (active, never_type, "1.13.0", Some(35121), None), + /// Allows diverging expressions to fall back to `!` rather than `()`. + (active, never_type_fallback, "1.41.0", Some(65992), None), + /// Allows using non lexical lifetimes (RFC 2094). + (active, nll, "1.0.0", Some(43234), None), + /// Allows `#![no_core]`. + (active, no_core, "1.3.0", Some(29639), None), + /// Allows function attribute `#[no_coverage]`, to bypass coverage + /// instrumentation of that function. + (active, no_coverage, "1.53.0", Some(84605), None), + /// Allows the use of `no_sanitize` attribute. + (active, no_sanitize, "1.42.0", Some(39699), None), + /// Allows using the `non_exhaustive_omitted_patterns` lint. + (active, non_exhaustive_omitted_patterns_lint, "1.57.0", Some(89554), None), + /// Allows making `dyn Trait` well-formed even if `Trait` is not object safe. + /// In that case, `dyn Trait: Trait` does not hold. Moreover, coercions and + /// casts in safe Rust to `dyn Trait` for such a `Trait` is also forbidden. + (active, object_safe_for_dispatch, "1.40.0", Some(43561), None), + /// Allows using `#[optimize(X)]`. + (active, optimize_attribute, "1.34.0", Some(54882), None), + /// Allows `extern "platform-intrinsic" { ... }`. + (active, platform_intrinsics, "1.4.0", Some(27731), None), + /// Allows using `#![plugin(myplugin)]`. + (active, plugin, "1.0.0", Some(29597), None), + /// Allows exhaustive integer pattern matching on `usize` and `isize`. + (active, precise_pointer_size_matching, "1.32.0", Some(56354), None), + /// Allows macro attributes on expressions, statements and non-inline modules. + (active, proc_macro_hygiene, "1.30.0", Some(54727), None), + /// Allows the use of raw-dylibs (RFC 2627). + (incomplete, raw_dylib, "1.40.0", Some(58713), None), + /// Allows `&raw const $place_expr` and `&raw mut $place_expr` expressions. + (active, raw_ref_op, "1.41.0", Some(64490), None), + /// Allows using the `#[register_attr]` attribute. + (active, register_attr, "1.41.0", Some(66080), None), + /// Allows using the `#[register_tool]` attribute. + (active, register_tool, "1.41.0", Some(66079), None), + /// Allows the `#[repr(i128)]` attribute for enums. + (incomplete, repr128, "1.16.0", Some(56071), None), + /// Allows `repr(simd)` and importing the various simd intrinsics. + (active, repr_simd, "1.4.0", Some(27731), None), + /// Allows the use of SIMD types in functions declared in `extern` blocks. + (active, simd_ffi, "1.0.0", Some(27731), None), + /// Allows specialization of implementations (RFC 1210). + (incomplete, specialization, "1.7.0", Some(31844), None), + /// Allows `#[link(kind="static-nobundle"...)]`. + (active, static_nobundle, "1.16.0", Some(37403), None), + /// Allows attributes on expressions and non-item statements. + (active, stmt_expr_attributes, "1.6.0", Some(15701), None), + /// Allows the use of `#[target_feature]` on safe functions. + (active, target_feature_11, "1.45.0", Some(69098), None), + /// Allows using `#[thread_local]` on `static` items. + (active, thread_local, "1.0.0", Some(29594), None), + /// Allows defining `trait X = A + B;` alias items. + (active, trait_alias, "1.24.0", Some(41517), None), /// Allows upcasting trait objects via supertraits. /// Trait upcasting is casting, e.g., `dyn Foo -> dyn Bar` where `Foo: Bar`. (incomplete, trait_upcasting, "1.56.0", Some(65991), None), - - /// Allows explicit generic arguments specification with `impl Trait` present. - (active, explicit_generic_args_with_impl_trait, "1.56.0", Some(83701), None), - - /// Allows using doc(primitive) without a future-incompat warning - (active, doc_primitive, "1.56.0", Some(88070), None), - - /// Allows non-trivial generic constants which have to have wfness manually propagated to callers - (incomplete, generic_const_exprs, "1.56.0", Some(76560), None), - - /// Allows additional const parameter types, such as `&'static str` or user defined types - (incomplete, adt_const_params, "1.56.0", Some(44580), None), - - /// Allows `let...else` statements. - (active, let_else, "1.56.0", Some(87335), None), - - /// Allows the `#[must_not_suspend]` attribute. - (active, must_not_suspend, "1.57.0", Some(83310), None), - - /// Allows `#[track_caller]` on closures and generators. - (active, closure_track_caller, "1.57.0", Some(87417), None), - - /// Allows `#[doc(cfg_hide(...))]`. - (active, doc_cfg_hide, "1.57.0", Some(43781), None), - - /// Allows using the `non_exhaustive_omitted_patterns` lint. - (active, non_exhaustive_omitted_patterns_lint, "1.57.0", Some(89554), None), - + /// Allows #[repr(transparent)] on unions (RFC 2645). + (active, transparent_unions, "1.37.0", Some(60405), None), + /// Allows inconsistent bounds in where clauses. + (active, trivial_bounds, "1.28.0", Some(48214), None), + /// Allows using `try {...}` expressions. + (active, try_blocks, "1.29.0", Some(31436), None), + /// 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 type ascription in expressions. + (active, type_ascription, "1.6.0", Some(23416), None), /// Allows creation of instances of a struct by moving fields that have /// not changed from prior instances of the same struct (RFC #2528) (incomplete, type_changing_struct_update, "1.58.0", Some(86555), None), - - /// Tells rustdoc to automatically generate `#[doc(cfg(...))]`. - (active, doc_auto_cfg, "1.58.0", Some(43781), None), + /// Allows unsized fn parameters. + (active, unsized_fn_params, "1.49.0", Some(48055), None), + /// Allows unsized rvalues at arguments and parameters. + (incomplete, unsized_locals, "1.30.0", Some(48055), None), + /// Allows unsized tuple coercion. + (active, unsized_tuple_coercion, "1.20.0", Some(42877), None), + /// Allows `union`s to implement `Drop`. Moreover, `union`s may now include fields + /// that don't implement `Copy` as long as they don't have any drop glue. + /// This is checked recursively. On encountering type variable where no progress can be made, + /// `T: Copy` is used as a substitute for "no drop glue". + /// + /// NOTE: A limited form of `union U { ... }` was accepted in 1.19.0. + (active, untagged_unions, "1.13.0", Some(55149), None), + /// Allows `extern "wasm" fn` + (active, wasm_abi, "1.53.0", Some(83788), None), + // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! + // Features are listed in alphabetical order. Tidy will fail if you don't keep it this way. + // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! // ------------------------------------------------------------------------- // feature-group-end: actual feature gates diff --git a/compiler/rustc_feature/src/builtin_attrs.rs b/compiler/rustc_feature/src/builtin_attrs.rs index 33188d375f5..fc7f01f041d 100644 --- a/compiler/rustc_feature/src/builtin_attrs.rs +++ b/compiler/rustc_feature/src/builtin_attrs.rs @@ -1,5 +1,6 @@ //! Built-in attributes and `cfg` flag gating. +use AttributeDuplicates::*; use AttributeGate::*; use AttributeType::*; @@ -88,11 +89,66 @@ impl AttributeGate { /// Only top-level shape (`#[attr]` vs `#[attr(...)]` vs `#[attr = ...]`) is considered now. #[derive(Clone, Copy, Default)] pub struct AttributeTemplate { + /// If `true`, the attribute is allowed to be a bare word like `#[test]`. pub word: bool, + /// If `Some`, the attribute is allowed to take a list of items like `#[allow(..)]`. pub list: Option<&'static str>, + /// If `Some`, the attribute is allowed to be a name/value pair where the + /// value is a string, like `#[must_use = "reason"]`. pub name_value_str: Option<&'static str>, } +/// How to handle multiple duplicate attributes on the same item. +#[derive(Clone, Copy, Default)] +pub enum AttributeDuplicates { + /// Duplicates of this attribute are allowed. + /// + /// This should only be used with attributes where duplicates have semantic + /// meaning, or some kind of "additive" behavior. For example, `#[warn(..)]` + /// can be specified multiple times, and it combines all the entries. Or use + /// this if there is validation done elsewhere. + #[default] + DuplicatesOk, + /// Duplicates after the first attribute will be an unused_attribute warning. + /// + /// This is usually used for "word" attributes, where they are used as a + /// boolean marker, like `#[used]`. It is not necessarily wrong that there + /// are duplicates, but the others should probably be removed. + WarnFollowing, + /// Same as `WarnFollowing`, but only issues warnings for word-style attributes. + /// + /// This is only for special cases, for example multiple `#[macro_use]` can + /// be warned, but multiple `#[macro_use(...)]` should not because the list + /// form has different meaning from the word form. + WarnFollowingWordOnly, + /// Duplicates after the first attribute will be an error. + /// + /// This should be used where duplicates would be ignored, but carry extra + /// meaning that could cause confusion. For example, `#[stable(since="1.0")] + /// #[stable(since="2.0")]`, which version should be used for `stable`? + ErrorFollowing, + /// Duplicates preceding the last instance of the attribute will be an error. + /// + /// This is the same as `ErrorFollowing`, except the last attribute is the + /// one that is "used". This is typically used in cases like codegen + /// attributes which usually only honor the last attribute. + ErrorPreceding, + /// Duplicates after the first attribute will be an unused_attribute warning + /// with a note that this will be an error in the future. + /// + /// This should be used for attributes that should be `ErrorFollowing`, but + /// because older versions of rustc silently accepted (and ignored) the + /// attributes, this is used to transition. + FutureWarnFollowing, + /// Duplicates preceding the last instance of the attribute will be a + /// warning, with a note that this will be an error in the future. + /// + /// This is the same as `FutureWarnFollowing`, except the last attribute is + /// the one that is "used". Ideally these can eventually migrate to + /// `ErrorPreceding`. + FutureWarnPreceding, +} + /// A convenience macro for constructing attribute templates. /// E.g., `template!(Word, List: "description")` means that the attribute /// supports forms `#[attr]` and `#[attr(description)]`. @@ -114,26 +170,45 @@ macro_rules! template { } macro_rules! ungated { - ($attr:ident, $typ:expr, $tpl:expr $(,)?) => { - (sym::$attr, $typ, $tpl, Ungated) + ($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr $(,)?) => { + BuiltinAttribute { + name: sym::$attr, + type_: $typ, + template: $tpl, + gate: Ungated, + duplicates: $duplicates, + } }; } macro_rules! gated { - ($attr:ident, $typ:expr, $tpl:expr, $gate:ident, $msg:expr $(,)?) => { - (sym::$attr, $typ, $tpl, Gated(Stability::Unstable, sym::$gate, $msg, cfg_fn!($gate))) + ($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $gate:ident, $msg:expr $(,)?) => { + BuiltinAttribute { + name: sym::$attr, + type_: $typ, + template: $tpl, + duplicates: $duplicates, + gate: Gated(Stability::Unstable, sym::$gate, $msg, cfg_fn!($gate)), + } }; - ($attr:ident, $typ:expr, $tpl:expr, $msg:expr $(,)?) => { - (sym::$attr, $typ, $tpl, Gated(Stability::Unstable, sym::$attr, $msg, cfg_fn!($attr))) + ($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $msg:expr $(,)?) => { + BuiltinAttribute { + name: sym::$attr, + type_: $typ, + template: $tpl, + duplicates: $duplicates, + gate: Gated(Stability::Unstable, sym::$attr, $msg, cfg_fn!($attr)), + } }; } macro_rules! rustc_attr { - (TEST, $attr:ident, $typ:expr, $tpl:expr $(,)?) => { + (TEST, $attr:ident, $typ:expr, $tpl:expr, $duplicate:expr $(,)?) => { rustc_attr!( $attr, $typ, $tpl, + $duplicate, concat!( "the `#[", stringify!($attr), @@ -142,13 +217,14 @@ macro_rules! rustc_attr { ), ) }; - ($attr:ident, $typ:expr, $tpl:expr, $msg:expr $(,)?) => { - ( - sym::$attr, - $typ, - $tpl, - Gated(Stability::Unstable, sym::rustc_attrs, $msg, cfg_fn!(rustc_attrs)), - ) + ($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $msg:expr $(,)?) => { + BuiltinAttribute { + name: sym::$attr, + type_: $typ, + template: $tpl, + duplicates: $duplicates, + gate: Gated(Stability::Unstable, sym::rustc_attrs, $msg, cfg_fn!(rustc_attrs)), + } }; } @@ -161,7 +237,13 @@ macro_rules! experimental { const IMPL_DETAIL: &str = "internal implementation detail"; const INTERNAL_UNSTABLE: &str = "this is an internal attribute that will never be stable"; -pub type BuiltinAttribute = (Symbol, AttributeType, AttributeTemplate, AttributeGate); +pub struct BuiltinAttribute { + pub name: Symbol, + pub type_: AttributeType, + pub template: AttributeTemplate, + pub duplicates: AttributeDuplicates, + pub gate: AttributeGate, +} /// Attributes that have a special meaning to rustc or rustdoc. #[rustfmt::skip] @@ -171,42 +253,48 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ // ========================================================================== // Conditional compilation: - ungated!(cfg, Normal, template!(List: "predicate")), - ungated!(cfg_attr, Normal, template!(List: "predicate, attr1, attr2, ...")), + ungated!(cfg, Normal, template!(List: "predicate"), DuplicatesOk), + ungated!(cfg_attr, Normal, template!(List: "predicate, attr1, attr2, ..."), DuplicatesOk), // Testing: - ungated!(ignore, Normal, template!(Word, NameValueStr: "reason")), + ungated!(ignore, Normal, template!(Word, NameValueStr: "reason"), WarnFollowing), ungated!( should_panic, Normal, - template!(Word, List: r#"expected = "reason"#, NameValueStr: "reason"), + template!(Word, List: r#"expected = "reason"#, NameValueStr: "reason"), FutureWarnFollowing, ), // FIXME(Centril): This can be used on stable but shouldn't. - ungated!(reexport_test_harness_main, CrateLevel, template!(NameValueStr: "name")), + ungated!(reexport_test_harness_main, CrateLevel, template!(NameValueStr: "name"), ErrorFollowing), // Macros: - ungated!(automatically_derived, Normal, template!(Word)), - // FIXME(#14407) - ungated!(macro_use, Normal, template!(Word, List: "name1, name2, ...")), - ungated!(macro_escape, Normal, template!(Word)), // Deprecated synonym for `macro_use`. - ungated!(macro_export, Normal, template!(Word, List: "local_inner_macros")), - ungated!(proc_macro, Normal, template!(Word)), + ungated!(automatically_derived, Normal, template!(Word), WarnFollowing), + ungated!(macro_use, Normal, template!(Word, List: "name1, name2, ..."), WarnFollowingWordOnly), + ungated!(macro_escape, Normal, template!(Word), WarnFollowing), // Deprecated synonym for `macro_use`. + ungated!(macro_export, Normal, template!(Word, List: "local_inner_macros"), WarnFollowing), + ungated!(proc_macro, Normal, template!(Word), ErrorFollowing), ungated!( proc_macro_derive, Normal, - template!(List: "TraitName, /*opt*/ attributes(name1, name2, ...)"), + template!(List: "TraitName, /*opt*/ attributes(name1, name2, ...)"), ErrorFollowing, ), - ungated!(proc_macro_attribute, Normal, template!(Word)), + ungated!(proc_macro_attribute, Normal, template!(Word), ErrorFollowing), // Lints: - ungated!(warn, Normal, template!(List: r#"lint1, lint2, ..., /*opt*/ reason = "...""#)), - ungated!(allow, Normal, template!(List: r#"lint1, lint2, ..., /*opt*/ reason = "...""#)), - ungated!(forbid, Normal, template!(List: r#"lint1, lint2, ..., /*opt*/ reason = "...""#)), - ungated!(deny, Normal, template!(List: r#"lint1, lint2, ..., /*opt*/ reason = "...""#)), - ungated!(must_use, Normal, template!(Word, NameValueStr: "reason")), + ungated!( + warn, Normal, template!(List: r#"lint1, lint2, ..., /*opt*/ reason = "...""#), DuplicatesOk + ), + ungated!( + allow, Normal, template!(List: r#"lint1, lint2, ..., /*opt*/ reason = "...""#), DuplicatesOk + ), + ungated!( + forbid, Normal, template!(List: r#"lint1, lint2, ..., /*opt*/ reason = "...""#), DuplicatesOk + ), + ungated!( + deny, Normal, template!(List: r#"lint1, lint2, ..., /*opt*/ reason = "...""#), DuplicatesOk + ), + ungated!(must_use, Normal, template!(Word, NameValueStr: "reason"), FutureWarnFollowing), gated!( - must_not_suspend, Normal, template!(Word, NameValueStr: "reason"), must_not_suspend, - experimental!(must_not_suspend) + must_not_suspend, Normal, template!(Word, NameValueStr: "reason"), WarnFollowing, + must_not_suspend, experimental!(must_not_suspend) ), - // FIXME(#14407) ungated!( deprecated, Normal, template!( @@ -214,85 +302,96 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ List: r#"/*opt*/ since = "version", /*opt*/ note = "reason""#, NameValueStr: "reason" ), + // This has special duplicate handling in E0550 to handle duplicates with rustc_deprecated + DuplicatesOk ), // Crate properties: - ungated!(crate_name, CrateLevel, template!(NameValueStr: "name")), - ungated!(crate_type, CrateLevel, template!(NameValueStr: "bin|lib|...")), - ungated!(crate_id, CrateLevel, template!(NameValueStr: "ignored")), + ungated!(crate_name, CrateLevel, template!(NameValueStr: "name"), FutureWarnFollowing), + ungated!(crate_type, CrateLevel, template!(NameValueStr: "bin|lib|..."), FutureWarnFollowing), + // crate_id is deprecated + ungated!(crate_id, CrateLevel, template!(NameValueStr: "ignored"), FutureWarnFollowing), // ABI, linking, symbols, and FFI ungated!( link, Normal, template!(List: r#"name = "...", /*opt*/ kind = "dylib|static|...", /*opt*/ wasm_import_module = "...""#), + DuplicatesOk, ), - ungated!(link_name, Normal, template!(NameValueStr: "name")), - ungated!(no_link, Normal, template!(Word)), - ungated!(repr, Normal, template!(List: "C")), - ungated!(export_name, Normal, template!(NameValueStr: "name")), - ungated!(link_section, Normal, template!(NameValueStr: "name")), - ungated!(no_mangle, Normal, template!(Word)), - ungated!(used, Normal, template!(Word)), + ungated!(link_name, Normal, template!(NameValueStr: "name"), FutureWarnPreceding), + ungated!(no_link, Normal, template!(Word), WarnFollowing), + ungated!(repr, Normal, template!(List: "C"), DuplicatesOk), + ungated!(export_name, Normal, template!(NameValueStr: "name"), FutureWarnPreceding), + ungated!(link_section, Normal, template!(NameValueStr: "name"), FutureWarnPreceding), + ungated!(no_mangle, Normal, template!(Word), WarnFollowing), + ungated!(used, Normal, template!(Word), WarnFollowing), // Limits: - ungated!(recursion_limit, CrateLevel, template!(NameValueStr: "N")), - ungated!(type_length_limit, CrateLevel, template!(NameValueStr: "N")), + ungated!(recursion_limit, CrateLevel, template!(NameValueStr: "N"), FutureWarnFollowing), + ungated!(type_length_limit, CrateLevel, template!(NameValueStr: "N"), FutureWarnFollowing), gated!( - const_eval_limit, CrateLevel, template!(NameValueStr: "N"), const_eval_limit, - experimental!(const_eval_limit) + const_eval_limit, CrateLevel, template!(NameValueStr: "N"), ErrorFollowing, + const_eval_limit, experimental!(const_eval_limit) ), gated!( - move_size_limit, CrateLevel, template!(NameValueStr: "N"), large_assignments, - experimental!(move_size_limit) + move_size_limit, CrateLevel, template!(NameValueStr: "N"), ErrorFollowing, + large_assignments, experimental!(move_size_limit) ), // Entry point: - ungated!(main, Normal, template!(Word)), - ungated!(start, Normal, template!(Word)), - ungated!(no_start, CrateLevel, template!(Word)), - ungated!(no_main, CrateLevel, template!(Word)), + ungated!(main, Normal, template!(Word), WarnFollowing), + ungated!(start, Normal, template!(Word), WarnFollowing), + ungated!(no_start, CrateLevel, template!(Word), WarnFollowing), + ungated!(no_main, CrateLevel, template!(Word), WarnFollowing), // Modules, prelude, and resolution: - ungated!(path, Normal, template!(NameValueStr: "file")), - ungated!(no_std, CrateLevel, template!(Word)), - ungated!(no_implicit_prelude, Normal, template!(Word)), - ungated!(non_exhaustive, Normal, template!(Word)), + ungated!(path, Normal, template!(NameValueStr: "file"), FutureWarnFollowing), + ungated!(no_std, CrateLevel, template!(Word), WarnFollowing), + ungated!(no_implicit_prelude, Normal, template!(Word), WarnFollowing), + ungated!(non_exhaustive, Normal, template!(Word), WarnFollowing), // Runtime - ungated!(windows_subsystem, Normal, template!(NameValueStr: "windows|console")), - ungated!(panic_handler, Normal, template!(Word)), // RFC 2070 + ungated!( + windows_subsystem, CrateLevel, + template!(NameValueStr: "windows|console"), FutureWarnFollowing + ), + ungated!(panic_handler, Normal, template!(Word), WarnFollowing), // RFC 2070 // Code generation: - ungated!(inline, Normal, template!(Word, List: "always|never")), - ungated!(cold, Normal, template!(Word)), - ungated!(no_builtins, Normal, template!(Word)), - ungated!(target_feature, Normal, template!(List: r#"enable = "name""#)), - ungated!(track_caller, Normal, template!(Word)), + ungated!(inline, Normal, template!(Word, List: "always|never"), FutureWarnFollowing), + ungated!(cold, Normal, template!(Word), WarnFollowing), + ungated!(no_builtins, CrateLevel, template!(Word), WarnFollowing), + ungated!(target_feature, Normal, template!(List: r#"enable = "name""#), DuplicatesOk), + ungated!(track_caller, Normal, template!(Word), WarnFollowing), gated!( no_sanitize, Normal, - template!(List: "address, memory, thread"), + template!(List: "address, memory, thread"), DuplicatesOk, experimental!(no_sanitize) ), - gated!(no_coverage, Normal, template!(Word), experimental!(no_coverage)), + gated!(no_coverage, Normal, template!(Word), WarnFollowing, experimental!(no_coverage)), - // FIXME: #14408 assume docs are used since rustdoc looks at them. - ungated!(doc, Normal, template!(List: "hidden|inline|...", NameValueStr: "string")), + ungated!( + doc, Normal, template!(List: "hidden|inline|...", NameValueStr: "string"), DuplicatesOk + ), // ========================================================================== // Unstable attributes: // ========================================================================== // Linking: - gated!(naked, Normal, template!(Word), naked_functions, experimental!(naked)), + gated!(naked, Normal, template!(Word), WarnFollowing, naked_functions, experimental!(naked)), gated!( - link_ordinal, Normal, template!(List: "ordinal"), raw_dylib, + link_ordinal, Normal, template!(List: "ordinal"), ErrorPreceding, raw_dylib, experimental!(link_ordinal) ), // Plugins: - ( - sym::plugin, CrateLevel, template!(List: "name"), - Gated( + BuiltinAttribute { + name: sym::plugin, + type_: CrateLevel, + template: template!(List: "name"), + duplicates: DuplicatesOk, + gate: Gated( Stability::Deprecated( "https://github.com/rust-lang/rust/pull/64675", Some("may be removed in a future compiler version"), @@ -300,46 +399,56 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ sym::plugin, "compiler plugins are deprecated", cfg_fn!(plugin) - ) - ), + ), + }, // Testing: - gated!(allow_fail, Normal, template!(Word), experimental!(allow_fail)), + gated!(allow_fail, Normal, template!(Word), WarnFollowing, experimental!(allow_fail)), gated!( - test_runner, CrateLevel, template!(List: "path"), custom_test_frameworks, + test_runner, CrateLevel, template!(List: "path"), ErrorFollowing, custom_test_frameworks, "custom test frameworks are an unstable feature", ), // RFC #1268 - gated!(marker, Normal, template!(Word), marker_trait_attr, experimental!(marker)), gated!( - thread_local, Normal, template!(Word), + marker, Normal, template!(Word), WarnFollowing, marker_trait_attr, experimental!(marker) + ), + gated!( + thread_local, Normal, template!(Word), WarnFollowing, "`#[thread_local]` is an experimental feature, and does not currently handle destructors", ), - gated!(no_core, CrateLevel, template!(Word), experimental!(no_core)), + gated!(no_core, CrateLevel, template!(Word), WarnFollowing, experimental!(no_core)), // RFC 2412 gated!( - optimize, Normal, template!(List: "size|speed"), optimize_attribute, + optimize, Normal, template!(List: "size|speed"), ErrorPreceding, optimize_attribute, experimental!(optimize), ), // RFC 2867 - gated!(instruction_set, Normal, template!(List: "set"), isa_attribute, experimental!(instruction_set)), + gated!( + instruction_set, Normal, template!(List: "set"), ErrorPreceding, + isa_attribute, experimental!(instruction_set) + ), - gated!(ffi_returns_twice, Normal, template!(Word), experimental!(ffi_returns_twice)), - gated!(ffi_pure, Normal, template!(Word), experimental!(ffi_pure)), - gated!(ffi_const, Normal, template!(Word), experimental!(ffi_const)), gated!( - register_attr, CrateLevel, template!(List: "attr1, attr2, ..."), + ffi_returns_twice, Normal, template!(Word), WarnFollowing, experimental!(ffi_returns_twice) + ), + gated!(ffi_pure, Normal, template!(Word), WarnFollowing, experimental!(ffi_pure)), + gated!(ffi_const, Normal, template!(Word), WarnFollowing, experimental!(ffi_const)), + gated!( + register_attr, CrateLevel, template!(List: "attr1, attr2, ..."), DuplicatesOk, experimental!(register_attr), ), gated!( - register_tool, CrateLevel, template!(List: "tool1, tool2, ..."), + register_tool, CrateLevel, template!(List: "tool1, tool2, ..."), DuplicatesOk, experimental!(register_tool), ), - gated!(cmse_nonsecure_entry, Normal, template!(Word), experimental!(cmse_nonsecure_entry)), + gated!( + cmse_nonsecure_entry, Normal, template!(Word), WarnFollowing, + experimental!(cmse_nonsecure_entry) + ), // RFC 2632 gated!( - default_method_body_is_const, Normal, template!(Word), const_trait_impl, + default_method_body_is_const, Normal, template!(Word), WarnFollowing, const_trait_impl, "`default_method_body_is_const` is a temporary placeholder for declaring default bodies \ as `const`, which may be removed or renamed in the future." ), @@ -348,34 +457,33 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ // Internal attributes: Stability, deprecation, and unsafe: // ========================================================================== - ungated!(feature, CrateLevel, template!(List: "name1, name1, ...")), - // FIXME(#14407) -- only looked at on-demand so we can't - // guarantee they'll have already been checked. + ungated!(feature, CrateLevel, template!(List: "name1, name1, ..."), DuplicatesOk), + // DuplicatesOk since it has its own validation ungated!( rustc_deprecated, Normal, - template!(List: r#"since = "version", reason = "...""#) + template!(List: r#"since = "version", reason = "...""#), DuplicatesOk // See E0550 + ), + // DuplicatesOk since it has its own validation + ungated!( + stable, Normal, template!(List: r#"feature = "name", since = "version""#), DuplicatesOk ), - // FIXME(#14407) - ungated!(stable, Normal, template!(List: r#"feature = "name", since = "version""#)), - // FIXME(#14407) ungated!( unstable, Normal, - template!(List: r#"feature = "name", reason = "...", issue = "N""#), + template!(List: r#"feature = "name", reason = "...", issue = "N""#), DuplicatesOk, ), - // FIXME(#14407) - ungated!(rustc_const_unstable, Normal, template!(List: r#"feature = "name""#)), - // FIXME(#14407) - ungated!(rustc_const_stable, Normal, template!(List: r#"feature = "name""#)), + ungated!(rustc_const_unstable, Normal, template!(List: r#"feature = "name""#), DuplicatesOk), + ungated!(rustc_const_stable, Normal, template!(List: r#"feature = "name""#), DuplicatesOk), gated!( - allow_internal_unstable, Normal, template!(Word, List: "feat1, feat2, ..."), + allow_internal_unstable, Normal, template!(Word, List: "feat1, feat2, ..."), DuplicatesOk, "allow_internal_unstable side-steps feature gating and stability checks", ), gated!( - rustc_allow_const_fn_unstable, Normal, template!(Word, List: "feat1, feat2, ..."), + rustc_allow_const_fn_unstable, Normal, + template!(Word, List: "feat1, feat2, ..."), DuplicatesOk, "rustc_allow_const_fn_unstable side-steps feature gating and stability checks" ), gated!( - allow_internal_unsafe, Normal, template!(Word), + allow_internal_unsafe, Normal, template!(Word), WarnFollowing, "allow_internal_unsafe side-steps the unsafe_code lint", ), @@ -383,9 +491,9 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ // Internal attributes: Type system related: // ========================================================================== - gated!(fundamental, Normal, template!(Word), experimental!(fundamental)), + gated!(fundamental, Normal, template!(Word), WarnFollowing, experimental!(fundamental)), gated!( - may_dangle, Normal, template!(Word), dropck_eyepatch, + may_dangle, Normal, template!(Word), WarnFollowing, dropck_eyepatch, "`may_dangle` has unstable semantics and may be removed in the future", ), @@ -393,26 +501,32 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ // Internal attributes: Runtime related: // ========================================================================== - rustc_attr!(rustc_allocator, Normal, template!(Word), IMPL_DETAIL), - rustc_attr!(rustc_allocator_nounwind, Normal, template!(Word), IMPL_DETAIL), - gated!(alloc_error_handler, Normal, template!(Word), experimental!(alloc_error_handler)), + rustc_attr!(rustc_allocator, Normal, template!(Word), WarnFollowing, IMPL_DETAIL), + rustc_attr!(rustc_allocator_nounwind, Normal, template!(Word), WarnFollowing, IMPL_DETAIL), + gated!( + alloc_error_handler, Normal, template!(Word), WarnFollowing, + experimental!(alloc_error_handler) + ), gated!( - default_lib_allocator, Normal, template!(Word), allocator_internals, + default_lib_allocator, Normal, template!(Word), WarnFollowing, allocator_internals, experimental!(default_lib_allocator), ), gated!( - needs_allocator, Normal, template!(Word), allocator_internals, + needs_allocator, Normal, template!(Word), WarnFollowing, allocator_internals, experimental!(needs_allocator), ), - gated!(panic_runtime, Normal, template!(Word), experimental!(panic_runtime)), - gated!(needs_panic_runtime, Normal, template!(Word), experimental!(needs_panic_runtime)), + gated!(panic_runtime, Normal, template!(Word), WarnFollowing, experimental!(panic_runtime)), gated!( - compiler_builtins, Normal, template!(Word), + needs_panic_runtime, Normal, template!(Word), WarnFollowing, + experimental!(needs_panic_runtime) + ), + gated!( + compiler_builtins, Normal, template!(Word), WarnFollowing, "the `#[compiler_builtins]` attribute is used to identify the `compiler_builtins` crate \ which contains compiler-rt intrinsics and will never be stable", ), gated!( - profiler_runtime, Normal, template!(Word), + profiler_runtime, Normal, template!(Word), WarnFollowing, "the `#[profiler_runtime]` attribute is used to identify the `profiler_builtins` crate \ which contains the profiler runtime and will never be stable", ), @@ -422,10 +536,12 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ // ========================================================================== gated!( - linkage, Normal, template!(NameValueStr: "external|internal|..."), + linkage, Normal, template!(NameValueStr: "external|internal|..."), ErrorPreceding, "the `linkage` attribute is experimental and not portable across platforms", ), - rustc_attr!(rustc_std_internal_symbol, Normal, template!(Word), INTERNAL_UNSTABLE), + rustc_attr!( + rustc_std_internal_symbol, Normal, template!(Word), WarnFollowing, INTERNAL_UNSTABLE + ), // ========================================================================== // Internal attributes, Macro related: @@ -433,13 +549,13 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ rustc_attr!( rustc_builtin_macro, Normal, - template!(Word, List: "name, /*opt*/ attributes(name1, name2, ...)"), + template!(Word, List: "name, /*opt*/ attributes(name1, name2, ...)"), ErrorFollowing, IMPL_DETAIL, ), - rustc_attr!(rustc_proc_macro_decls, Normal, template!(Word), INTERNAL_UNSTABLE), + rustc_attr!(rustc_proc_macro_decls, Normal, template!(Word), WarnFollowing, INTERNAL_UNSTABLE), rustc_attr!( rustc_macro_transparency, Normal, - template!(NameValueStr: "transparent|semitransparent|opaque"), + template!(NameValueStr: "transparent|semitransparent|opaque"), ErrorFollowing, "used internally for testing macro hygiene", ), @@ -453,39 +569,49 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ List: r#"/*opt*/ message = "...", /*opt*/ label = "...", /*opt*/ note = "...""#, NameValueStr: "message" ), + ErrorFollowing, INTERNAL_UNSTABLE ), // Enumerates "identity-like" conversion methods to suggest on type mismatch. - rustc_attr!(rustc_conversion_suggestion, Normal, template!(Word), INTERNAL_UNSTABLE), + rustc_attr!( + rustc_conversion_suggestion, Normal, template!(Word), WarnFollowing, INTERNAL_UNSTABLE + ), // Prevents field reads in the marked trait or method to be considered // during dead code analysis. - rustc_attr!(rustc_trivial_field_reads, Normal, template!(Word), INTERNAL_UNSTABLE), + rustc_attr!( + rustc_trivial_field_reads, Normal, template!(Word), WarnFollowing, INTERNAL_UNSTABLE + ), // ========================================================================== // Internal attributes, Const related: // ========================================================================== - rustc_attr!(rustc_promotable, Normal, template!(Word), IMPL_DETAIL), - rustc_attr!(rustc_legacy_const_generics, Normal, template!(List: "N"), INTERNAL_UNSTABLE), + rustc_attr!(rustc_promotable, Normal, template!(Word), WarnFollowing, IMPL_DETAIL), + rustc_attr!( + rustc_legacy_const_generics, Normal, template!(List: "N"), ErrorFollowing, + INTERNAL_UNSTABLE + ), // Do not const-check this function's body. It will always get replaced during CTFE. - rustc_attr!(rustc_do_not_const_check, Normal, template!(Word), INTERNAL_UNSTABLE), + rustc_attr!( + rustc_do_not_const_check, Normal, template!(Word), WarnFollowing, INTERNAL_UNSTABLE + ), // ========================================================================== // Internal attributes, Layout related: // ========================================================================== rustc_attr!( - rustc_layout_scalar_valid_range_start, Normal, template!(List: "value"), + rustc_layout_scalar_valid_range_start, Normal, template!(List: "value"), ErrorFollowing, "the `#[rustc_layout_scalar_valid_range_start]` attribute is just used to enable \ niche optimizations in libcore and will never be stable", ), rustc_attr!( - rustc_layout_scalar_valid_range_end, Normal, template!(List: "value"), + rustc_layout_scalar_valid_range_end, Normal, template!(List: "value"), ErrorFollowing, "the `#[rustc_layout_scalar_valid_range_end]` attribute is just used to enable \ niche optimizations in libcore and will never be stable", ), rustc_attr!( - rustc_nonnull_optimization_guaranteed, Normal, template!(Word), + rustc_nonnull_optimization_guaranteed, Normal, template!(Word), WarnFollowing, "the `#[rustc_nonnull_optimization_guaranteed]` attribute is just used to enable \ niche optimizations in libcore and will never be stable", ), @@ -494,114 +620,133 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ // Internal attributes, Misc: // ========================================================================== gated!( - lang, Normal, template!(NameValueStr: "name"), lang_items, + lang, Normal, template!(NameValueStr: "name"), DuplicatesOk, lang_items, "language items are subject to change", ), - ( - sym::rustc_diagnostic_item, - Normal, - template!(NameValueStr: "name"), - Gated( + rustc_attr!( + rustc_pass_by_value, Normal, + template!(Word), ErrorFollowing, + "#[rustc_pass_by_value] is used to mark types that must be passed by value instead of reference." + ), + BuiltinAttribute { + name: sym::rustc_diagnostic_item, + type_: Normal, + template: template!(NameValueStr: "name"), + duplicates: ErrorFollowing, + gate: Gated( Stability::Unstable, sym::rustc_attrs, "diagnostic items compiler internal support for linting", cfg_fn!(rustc_attrs), ), - ), + }, gated!( // Used in resolve: - prelude_import, Normal, template!(Word), + prelude_import, Normal, template!(Word), WarnFollowing, "`#[prelude_import]` is for use by rustc only", ), gated!( - rustc_paren_sugar, Normal, template!(Word), unboxed_closures, + rustc_paren_sugar, Normal, template!(Word), WarnFollowing, unboxed_closures, "unboxed_closures are still evolving", ), rustc_attr!( - rustc_inherit_overflow_checks, Normal, template!(Word), + rustc_inherit_overflow_checks, Normal, template!(Word), WarnFollowing, "the `#[rustc_inherit_overflow_checks]` attribute is just used to control \ overflow checking behavior of several libcore functions that are inlined \ across crates and will never be stable", ), - rustc_attr!(rustc_reservation_impl, Normal, template!(NameValueStr: "reservation message"), - "the `#[rustc_reservation_impl]` attribute is internally used \ - for reserving for `for<T> From<!> for T` impl" + rustc_attr!( + rustc_reservation_impl, Normal, + template!(NameValueStr: "reservation message"), ErrorFollowing, + "the `#[rustc_reservation_impl]` attribute is internally used \ + for reserving for `for<T> From<!> for T` impl" ), rustc_attr!( - rustc_test_marker, Normal, template!(Word), + rustc_test_marker, Normal, template!(Word), WarnFollowing, "the `#[rustc_test_marker]` attribute is used internally to track tests", ), rustc_attr!( - rustc_unsafe_specialization_marker, Normal, template!(Word), + rustc_unsafe_specialization_marker, Normal, template!(Word), WarnFollowing, "the `#[rustc_unsafe_specialization_marker]` attribute is used to check specializations" ), rustc_attr!( - rustc_specialization_trait, Normal, template!(Word), + rustc_specialization_trait, Normal, template!(Word), WarnFollowing, "the `#[rustc_specialization_trait]` attribute is used to check specializations" ), rustc_attr!( - rustc_main, Normal, template!(Word), + rustc_main, Normal, template!(Word), WarnFollowing, "the `#[rustc_main]` attribute is used internally to specify test entry point function", ), rustc_attr!( - rustc_skip_array_during_method_dispatch, Normal, template!(Word), + rustc_skip_array_during_method_dispatch, Normal, template!(Word), WarnFollowing, "the `#[rustc_skip_array_during_method_dispatch]` attribute is used to exclude a trait \ from method dispatch when the receiver is an array, for compatibility in editions < 2021." ), + rustc_attr!( + rustc_must_implement_one_of, Normal, template!(List: "function1, function2, ..."), ErrorFollowing, + "the `#[rustc_must_implement_one_of]` attribute is used to change minimal complete \ + definition of a trait, it's currently in experimental form and should be changed before \ + being exposed outside of the std" + ), // ========================================================================== // Internal attributes, Testing: // ========================================================================== - rustc_attr!(TEST, rustc_outlives, Normal, template!(Word)), - rustc_attr!(TEST, rustc_capture_analysis, Normal, template!(Word)), - rustc_attr!(TEST, rustc_insignificant_dtor, Normal, template!(Word)), - rustc_attr!(TEST, rustc_strict_coherence, Normal, template!(Word)), - rustc_attr!(TEST, rustc_variance, Normal, template!(Word)), - rustc_attr!(TEST, rustc_layout, Normal, template!(List: "field1, field2, ...")), - rustc_attr!(TEST, rustc_regions, Normal, template!(Word)), + rustc_attr!(TEST, rustc_outlives, Normal, template!(Word), WarnFollowing), + rustc_attr!(TEST, rustc_capture_analysis, Normal, template!(Word), WarnFollowing), + rustc_attr!(TEST, rustc_insignificant_dtor, Normal, template!(Word), WarnFollowing), + rustc_attr!(TEST, rustc_strict_coherence, Normal, template!(Word), WarnFollowing), + rustc_attr!(TEST, rustc_with_negative_coherence, Normal, template!(Word), WarnFollowing), + rustc_attr!(TEST, rustc_variance, Normal, template!(Word), WarnFollowing), + rustc_attr!(TEST, rustc_layout, Normal, template!(List: "field1, field2, ..."), WarnFollowing), + rustc_attr!(TEST, rustc_regions, Normal, template!(Word), WarnFollowing), rustc_attr!( TEST, rustc_error, Normal, - template!(Word, List: "delay_span_bug_from_inside_query") + template!(Word, List: "delay_span_bug_from_inside_query"), WarnFollowingWordOnly + ), + rustc_attr!(TEST, rustc_dump_user_substs, Normal, template!(Word), WarnFollowing), + rustc_attr!(TEST, rustc_evaluate_where_clauses, Normal, template!(Word), WarnFollowing), + rustc_attr!( + TEST, rustc_if_this_changed, Normal, template!(Word, List: "DepNode"), DuplicatesOk + ), + rustc_attr!( + TEST, rustc_then_this_would_need, Normal, template!(List: "DepNode"), DuplicatesOk ), - rustc_attr!(TEST, rustc_dump_user_substs, Normal, template!(Word)), - rustc_attr!(TEST, rustc_evaluate_where_clauses, Normal, template!(Word)), - rustc_attr!(TEST, rustc_if_this_changed, Normal, template!(Word, List: "DepNode")), - rustc_attr!(TEST, rustc_then_this_would_need, Normal, template!(List: "DepNode")), rustc_attr!( TEST, rustc_clean, Normal, template!(List: r#"cfg = "...", /*opt*/ label = "...", /*opt*/ except = "...""#), + DuplicatesOk, ), rustc_attr!( TEST, rustc_partition_reused, Normal, - template!(List: r#"cfg = "...", module = "...""#), + template!(List: r#"cfg = "...", module = "...""#), DuplicatesOk, ), rustc_attr!( TEST, rustc_partition_codegened, Normal, - template!(List: r#"cfg = "...", module = "...""#), + template!(List: r#"cfg = "...", module = "...""#), DuplicatesOk, ), rustc_attr!( TEST, rustc_expected_cgu_reuse, Normal, - template!(List: r#"cfg = "...", module = "...", kind = "...""#), - ), - rustc_attr!(TEST, rustc_synthetic, Normal, template!(Word)), - rustc_attr!(TEST, rustc_symbol_name, Normal, template!(Word)), - rustc_attr!(TEST, rustc_polymorphize_error, Normal, template!(Word)), - rustc_attr!(TEST, rustc_def_path, Normal, template!(Word)), - rustc_attr!(TEST, rustc_mir, Normal, template!(List: "arg1, arg2, ...")), - rustc_attr!(TEST, rustc_dump_program_clauses, Normal, template!(Word)), - rustc_attr!(TEST, rustc_dump_env_program_clauses, Normal, template!(Word)), - rustc_attr!(TEST, rustc_object_lifetime_default, Normal, template!(Word)), - rustc_attr!(TEST, rustc_dump_vtable, Normal, template!(Word)), - rustc_attr!(TEST, rustc_dummy, Normal, template!(Word /* doesn't matter*/)), + template!(List: r#"cfg = "...", module = "...", kind = "...""#), DuplicatesOk, + ), + rustc_attr!(TEST, rustc_symbol_name, Normal, template!(Word), WarnFollowing), + rustc_attr!(TEST, rustc_polymorphize_error, Normal, template!(Word), WarnFollowing), + rustc_attr!(TEST, rustc_def_path, Normal, template!(Word), WarnFollowing), + rustc_attr!(TEST, rustc_mir, Normal, template!(List: "arg1, arg2, ..."), DuplicatesOk), + rustc_attr!(TEST, rustc_dump_program_clauses, Normal, template!(Word), WarnFollowing), + rustc_attr!(TEST, rustc_dump_env_program_clauses, Normal, template!(Word), WarnFollowing), + rustc_attr!(TEST, rustc_object_lifetime_default, Normal, template!(Word), WarnFollowing), + rustc_attr!(TEST, rustc_dump_vtable, Normal, template!(Word), WarnFollowing), + rustc_attr!(TEST, rustc_dummy, Normal, template!(Word /* doesn't matter*/), DuplicatesOk), gated!( - omit_gdb_pretty_printer_section, Normal, template!(Word), + omit_gdb_pretty_printer_section, Normal, template!(Word), WarnFollowing, "the `#[omit_gdb_pretty_printer_section]` attribute is just used for the Rust test suite", ), ]; pub fn deprecated_attributes() -> Vec<&'static BuiltinAttribute> { - BUILTIN_ATTRIBUTES.iter().filter(|(.., gate)| gate.is_deprecated()).collect() + BUILTIN_ATTRIBUTES.iter().filter(|attr| attr.gate.is_deprecated()).collect() } pub fn is_builtin_attr_name(name: Symbol) -> bool { @@ -612,8 +757,8 @@ pub static BUILTIN_ATTRIBUTE_MAP: SyncLazy<FxHashMap<Symbol, &BuiltinAttribute>> SyncLazy::new(|| { let mut map = FxHashMap::default(); for attr in BUILTIN_ATTRIBUTES.iter() { - if map.insert(attr.0, attr).is_some() { - panic!("duplicate builtin attribute `{}`", attr.0); + if map.insert(attr.name, attr).is_some() { + panic!("duplicate builtin attribute `{}`", attr.name); } } map diff --git a/compiler/rustc_feature/src/lib.rs b/compiler/rustc_feature/src/lib.rs index b25aab21e49..bfc537cfae2 100644 --- a/compiler/rustc_feature/src/lib.rs +++ b/compiler/rustc_feature/src/lib.rs @@ -11,6 +11,7 @@ //! even if it is stabilized or removed, *do not remove it*. Instead, move the //! symbol to the `accepted` or `removed` modules respectively. +#![feature(derive_default_enum)] #![feature(once_cell)] mod accepted; @@ -146,6 +147,7 @@ pub fn find_feature_issue(feature: Symbol, issue: GateIssue) -> Option<NonZeroU3 pub use accepted::ACCEPTED_FEATURES; pub use active::{Features, ACTIVE_FEATURES, INCOMPATIBLE_FEATURES}; +pub use builtin_attrs::AttributeDuplicates; pub use builtin_attrs::{ deprecated_attributes, find_gated_cfg, is_builtin_attr_name, AttributeGate, AttributeTemplate, AttributeType, BuiltinAttribute, GatedCfg, BUILTIN_ATTRIBUTES, BUILTIN_ATTRIBUTE_MAP, diff --git a/compiler/rustc_feature/src/removed.rs b/compiler/rustc_feature/src/removed.rs index 7b9b68268ea..b9f3b5ad1b1 100644 --- a/compiler/rustc_feature/src/removed.rs +++ b/compiler/rustc_feature/src/removed.rs @@ -45,132 +45,136 @@ declare_features! ( // feature-group-start: removed 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 - (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. - (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 - (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, - Some("removed in favor of `#[repr(simd)]`")), (removed, advanced_slice_patterns, "1.0.0", Some(62254), None, Some("merged into `#![feature(slice_patterns)]`")), - (removed, macro_reexport, "1.0.0", Some(29638), None, - Some("subsumed by `pub use`")), + (removed, allocator, "1.0.0", None, None, None), + (removed, await_macro, "1.38.0", Some(50547), None, + Some("subsumed by `.await` syntax")), + /// Allows comparing raw pointers during const eval. + (removed, const_compare_raw_pointers, "1.46.0", Some(53020), None, + Some("cannot be allowed in const eval in any meaningful way")), + /// Allows non-trivial generic constants which have to be manually propagated upwards. + (removed, const_evaluatable_checked, "1.48.0", Some(76560), None, Some("renamed to `generic_const_exprs`")), + /// Allows the definition of `const` functions with some advanced features. + (removed, const_fn, "1.54.0", Some(57563), None, + Some("split into finer-grained feature gates")), + /// Allows const generic types (e.g. `struct Foo<const N: usize>(...);`). + (removed, const_generics, "1.34.0", Some(44580), None, + Some("removed in favor of `#![feature(adt_const_params)]` and `#![feature(generic_const_exprs)]`")), + /// Allows `[x; N]` where `x` is a constant (RFC 2203). + (removed, const_in_array_repeat_expressions, "1.37.0", Some(49147), None, + Some("removed due to causing promotable bugs")), + /// Allows casting raw pointers to `usize` during const eval. + (removed, const_raw_ptr_to_usize_cast, "1.55.0", Some(51910), None, + Some("at compile-time, pointers do not have an integer value, so these casts cannot be properly supported")), + /// Allows `T: ?const Trait` syntax in bounds. + (removed, const_trait_bound_opt_out, "1.42.0", Some(67794), None, + Some("Removed in favor of `~const` bound in #![feature(const_trait_impl)]")), /// Allows using custom attributes (RFC 572). (removed, custom_attribute, "1.0.0", Some(29642), None, Some("removed in favor of `#![register_tool]` and `#![register_attr]`")), - /// Allows features specific to OIBIT (now called auto traits). - /// Renamed to `auto_traits`. - (removed, optin_builtin_traits, "1.0.0", Some(13231), None, - Some("renamed to `auto_traits`")), - (removed, pushpop_unsafe, "1.2.0", None, None, None), - (removed, needs_allocator, "1.4.0", Some(27389), None, - Some("subsumed by `#![feature(allocator_internals)]`")), - /// Allows identifying crates that contain sanitizer runtimes. - (removed, sanitizer_runtime, "1.17.0", None, None, None), + /// 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]`")), + /// Allows using `#[doc(keyword = "...")]`. + (removed, doc_keyword, "1.28.0", Some(51315), None, + Some("merged into `#![feature(rustdoc_internals)]`")), + /// Allows using `doc(primitive)` without a future-incompat warning. + (removed, doc_primitive, "1.56.0", Some(88070), None, + Some("merged into `#![feature(rustdoc_internals)]`")), /// Allows `#[doc(spotlight)]`. /// The attribute was renamed to `#[doc(notable_trait)]` /// and the feature to `doc_notable_trait`. (removed, doc_spotlight, "1.22.0", Some(45040), None, Some("renamed to `doc_notable_trait`")), - (removed, proc_macro_mod, "1.27.0", Some(54727), None, - Some("subsumed by `#![feature(proc_macro_hygiene)]`")), - (removed, proc_macro_expr, "1.27.0", Some(54727), None, - Some("subsumed by `#![feature(proc_macro_hygiene)]`")), - (removed, proc_macro_non_items, "1.27.0", Some(54727), None, - Some("subsumed by `#![feature(proc_macro_hygiene)]`")), - (removed, proc_macro_gen, "1.27.0", Some(54727), None, - 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]`. - (removed, custom_derive, "1.32.0", Some(29644), None, - Some("subsumed by `#[proc_macro_derive]`")), - /// 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 const generic types (e.g. `struct Foo<const N: usize>(...);`). - (removed, const_generics, "1.34.0", Some(44580), None, - Some("removed in favor of `#![feature(adt_const_params)]` and `#![feature(generic_const_exprs)]`")), - /// Allows `[x; N]` where `x` is a constant (RFC 2203). - (removed, const_in_array_repeat_expressions, "1.37.0", Some(49147), None, - Some("removed due to causing promotable bugs")), /// 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. (removed, existential_type, "1.38.0", Some(63063), None, Some("removed in favor of `#![feature(type_alias_impl_trait)]`")), - /// Allows using the macros: - /// + `__diagnostic_used` - /// + `__register_diagnostic` - /// +`__build_diagnostic_array` - (removed, rustc_diagnostic_macros, "1.38.0", None, None, None), - /// Allows using `#[on_unimplemented(..)]` on traits. - /// (Moved to `rustc_attrs`.) - (removed, on_unimplemented, "1.40.0", None, None, None), - /// Allows overlapping impls of marker traits. - (removed, overlapping_marker_traits, "1.42.0", Some(29864), None, - Some("removed in favor of `#![feature(marker_trait_attr)]`")), - /// Allows `T: ?const Trait` syntax in bounds. - (removed, const_trait_bound_opt_out, "1.42.0", Some(67794), None, - Some("Removed in favor of `~const` bound in #![feature(const_trait_impl)]")), - /// Allows `#[no_debug]`. - (removed, no_debug, "1.43.0", Some(29721), None, Some("removed due to lack of demand")), + /// Paths of the form: `extern::foo::bar` + (removed, extern_in_paths, "1.33.0", Some(55600), None, + Some("subsumed by `::foo::bar` paths")), + /// Allows `#[doc(include = "some-file")]`. + (removed, external_doc, "1.54.0", Some(44732), None, + Some("use #[doc = include_str!(\"filename\")] instead, which handles macro invocations")), + /// Allows `impl Trait` in bindings (`let`, `const`, `static`). + (removed, impl_trait_in_bindings, "1.55.0", Some(63065), None, + Some("the implementation was not maintainable, the feature may get reintroduced once the current refactorings are done")), + (removed, import_shadowing, "1.0.0", None, None, None), /// Lazily evaluate constants. This allows constants to depend on type parameters. (removed, lazy_normalization_consts, "1.46.0", Some(72219), None, Some("superseded by `generic_const_exprs`")), - /// Allows comparing raw pointers during const eval. - (removed, const_compare_raw_pointers, "1.46.0", Some(53020), None, - Some("cannot be allowed in const eval in any meaningful way")), - /// Allows non-trivial generic constants which have to be manually propagated upwards. - (removed, const_evaluatable_checked, "1.48.0", Some(76560), None, Some("renamed to `generic_const_exprs`")), /// Allows using the `#[link_args]` attribute. (removed, link_args, "1.53.0", Some(29596), None, Some("removed in favor of using `-C link-arg=ARG` on command line, \ which is available from cargo build scripts with `cargo:rustc-link-arg` now")), + (removed, macro_reexport, "1.0.0", Some(29638), None, + Some("subsumed by `pub use`")), /// Allows using `#[main]` to replace the entrypoint `#[lang = "start"]` calls. (removed, main, "1.53.0", Some(29634), None, None), - (removed, pub_macro_rules, "1.53.0", Some(78855), None, - Some("removed due to being incomplete, in particular it does not work across crates")), - /// Allows the definition of `const` functions with some advanced features. - (removed, const_fn, "1.54.0", Some(57563), None, - Some("split into finer-grained feature gates")), - /// Allows using `#[plugin_registrar]` on functions. - (removed, plugin_registrar, "1.54.0", Some(29597), None, - Some("a __rustc_plugin_registrar symbol must now be defined instead")), - - /// Allows `#[doc(include = "some-file")]`. - (removed, external_doc, "1.54.0", Some(44732), None, - Some("use #[doc = include_str!(\"filename\")] instead, which handles macro invocations")), - - /// Allows casting raw pointers to `usize` during const eval. - (removed, const_raw_ptr_to_usize_cast, "1.55.0", Some(51910), None, - Some("at compile-time, pointers do not have an integer value, so these casts cannot be properly supported")), - - /// Allows `impl Trait` in bindings (`let`, `const`, `static`). - (removed, impl_trait_in_bindings, "1.55.0", Some(63065), None, - Some("the implementation was not maintainable, the feature may get reintroduced once the current refactorings are done")), - + (removed, managed_boxes, "1.0.0", None, None, None), /// Allows the use of type alias impl trait in function return positions (removed, min_type_alias_impl_trait, "1.56.0", Some(63063), None, Some("removed in favor of full type_alias_impl_trait")), - + (removed, needs_allocator, "1.4.0", Some(27389), None, + Some("subsumed by `#![feature(allocator_internals)]`")), + /// Allows use of unary negate on unsigned integers, e.g., -e for e: u8 + (removed, negate_unsigned, "1.0.0", Some(29645), None, None), + /// Allows `#[no_debug]`. + (removed, no_debug, "1.43.0", Some(29721), None, Some("removed due to lack of demand")), + /// Allows using `#[on_unimplemented(..)]` on traits. + /// (Moved to `rustc_attrs`.) + (removed, on_unimplemented, "1.40.0", None, None, None), + /// 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), + /// Allows features specific to OIBIT (now called auto traits). + /// Renamed to `auto_traits`. + (removed, optin_builtin_traits, "1.0.0", Some(13231), None, + Some("renamed to `auto_traits`")), + /// Allows overlapping impls of marker traits. + (removed, overlapping_marker_traits, "1.42.0", Some(29864), None, + Some("removed in favor of `#![feature(marker_trait_attr)]`")), + (removed, panic_implementation, "1.28.0", Some(44489), None, + Some("subsumed by `#[panic_handler]`")), + /// Allows using `#[plugin_registrar]` on functions. + (removed, plugin_registrar, "1.54.0", Some(29597), None, + Some("a __rustc_plugin_registrar symbol must now be defined instead")), + (removed, proc_macro_expr, "1.27.0", Some(54727), None, + Some("subsumed by `#![feature(proc_macro_hygiene)]`")), + (removed, proc_macro_gen, "1.27.0", Some(54727), None, + Some("subsumed by `#![feature(proc_macro_hygiene)]`")), + (removed, proc_macro_mod, "1.27.0", Some(54727), None, + Some("subsumed by `#![feature(proc_macro_hygiene)]`")), + (removed, proc_macro_non_items, "1.27.0", Some(54727), None, + Some("subsumed by `#![feature(proc_macro_hygiene)]`")), + (removed, pub_macro_rules, "1.53.0", Some(78855), None, + Some("removed due to being incomplete, in particular it does not work across crates")), + (removed, pushpop_unsafe, "1.2.0", None, None, None), + (removed, quad_precision_float, "1.0.0", None, None, None), + (removed, quote, "1.33.0", Some(29601), None, None), + (removed, reflect, "1.0.0", Some(27749), None, None), + /// Allows using the macros: + /// + `__diagnostic_used` + /// + `__register_diagnostic` + /// +`__build_diagnostic_array` + (removed, rustc_diagnostic_macros, "1.38.0", None, None, None), + /// Allows identifying crates that contain sanitizer runtimes. + (removed, sanitizer_runtime, "1.17.0", None, None, None), + (removed, simd, "1.0.0", Some(27731), None, + Some("removed in favor of `#[repr(simd)]`")), + (removed, struct_inherit, "1.0.0", None, None, None), + (removed, test_removed_feature, "1.0.0", None, None, None), + /// Allows using items which are missing stability attributes + (removed, unmarked_api, "1.0.0", None, None, None), + (removed, unsafe_no_drop_flag, "1.0.0", None, None, None), /// Allows `#[unwind(..)]`. /// /// Permits specifying whether a function should permit unwinding or abort on unwind. (removed, unwind_attributes, "1.56.0", Some(58760), None, Some("use the C-unwind ABI instead")), + (removed, visible_private_types, "1.0.0", None, None, None), + // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! + // Features are listed in alphabetical order. Tidy will fail if you don't keep it this way. + // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! // ------------------------------------------------------------------------- // feature-group-end: removed features |