//! List of the accepted feature gates. use super::{Feature, State}; use rustc_span::symbol::sym; macro_rules! declare_features { ($( $(#[doc = $doc:tt])* (accepted, $feature:ident, $ver:expr, $issue:expr, None), )+) => { /// Those language feature has since been Accepted (it was once Active) pub const ACCEPTED_FEATURES: &[Feature] = &[ $( Feature { state: State::Accepted, name: sym::$feature, since: $ver, issue: $issue, edition: None, description: concat!($($doc,)*), } ),+ ]; } } #[rustfmt::skip] declare_features! ( // ------------------------------------------------------------------------- // feature-group-start: for testing purposes // ------------------------------------------------------------------------- /// A temporary feature gate used to enable parser extensions needed /// to bootstrap fix for #5723. (accepted, issue_5723_bootstrap, "1.0.0", None, None), /// These are used to test this portion of the compiler, /// they don't actually mean anything. (accepted, test_accepted_feature, "1.0.0", None, None), // ------------------------------------------------------------------------- // feature-group-end: for testing purposes // ------------------------------------------------------------------------- // ------------------------------------------------------------------------- // feature-group-start: accepted features // ------------------------------------------------------------------------- /// 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 overloading augmented assignment operations like `a += b`. (accepted, augmented_assignments, "1.8.0", Some(28235), 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 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 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 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.used). (accepted, used, "1.30.0", Some(40289), None), /// Allows `crate` in paths. (accepted, crate_in_paths, "1.30.0", Some(45477), None), /// Allows resolving absolute paths as paths from other crates. (accepted, extern_absolute_paths, "1.30.0", Some(44660), None), /// Allows access to crate names passed via `--extern` through prelude. (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 lifetime elision in `impl` headers. For example: /// + `impl 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 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 `.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 macro invocations in `extern {}` blocks. (accepted, macros_in_extern, "1.40.0", Some(49476), 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 relaxing the coherence rules such that /// `impl ForeignTrait for ForeignType` 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 using subslice patterns, `[a, .., b]` and `[a, xs @ .., b]`. (accepted, slice_patterns, "1.42.0", Some(62254), None), // ------------------------------------------------------------------------- // feature-group-end: accepted features // ------------------------------------------------------------------------- );