1 //! List of the accepted feature gates.
3 use super::{State, Feature}
;
4 use syntax_pos
::symbol
::sym
;
6 macro_rules
! declare_features
{
8 $
(#[doc = $doc:tt])* (accepted, $feature:ident, $ver:expr, $issue:expr, None),
10 /// Those language feature has since been Accepted (it was once Active)
11 pub const ACCEPTED_FEATURES
: &[Feature
] = &[
14 state
: State
::Accepted
,
19 description
: concat
!($
($doc
,)*),
27 // -------------------------------------------------------------------------
28 // feature-group-start: for testing purposes
29 // -------------------------------------------------------------------------
31 /// A temporary feature gate used to enable parser extensions needed
32 /// to bootstrap fix for #5723.
33 (accepted
, issue_5723_bootstrap
, "1.0.0", None
, None
),
34 /// These are used to test this portion of the compiler,
35 /// they don't actually mean anything.
36 (accepted
, test_accepted_feature
, "1.0.0", None
, None
),
38 // -------------------------------------------------------------------------
39 // feature-group-end: for testing purposes
40 // -------------------------------------------------------------------------
42 // -------------------------------------------------------------------------
43 // feature-group-start: accepted features
44 // -------------------------------------------------------------------------
46 /// Allows using associated `type`s in `trait`s.
47 (accepted
, associated_types
, "1.0.0", None
, None
),
48 /// Allows using assigning a default type to type parameters in algebraic data type definitions.
49 (accepted
, default_type_params
, "1.0.0", None
, None
),
50 // FIXME: explain `globs`.
51 (accepted
, globs
, "1.0.0", None
, None
),
52 /// Allows `macro_rules!` items.
53 (accepted
, macro_rules
, "1.0.0", None
, None
),
54 /// Allows use of `&foo[a..b]` as a slicing syntax.
55 (accepted
, slicing_syntax
, "1.0.0", None
, None
),
56 /// Allows struct variants `Foo { baz: u8, .. }` in enums (RFC 418).
57 (accepted
, struct_variant
, "1.0.0", None
, None
),
58 /// Allows indexing tuples.
59 (accepted
, tuple_indexing
, "1.0.0", None
, None
),
60 /// Allows the use of `if let` expressions.
61 (accepted
, if_let
, "1.0.0", None
, None
),
62 /// Allows the use of `while let` expressions.
63 (accepted
, while_let
, "1.0.0", None
, None
),
64 /// Allows using `#![no_std]`.
65 (accepted
, no_std
, "1.6.0", None
, None
),
66 /// Allows overloading augmented assignment operations like `a += b`.
67 (accepted
, augmented_assignments
, "1.8.0", Some(28235), None
),
68 /// Allows empty structs and enum variants with braces.
69 (accepted
, braced_empty_structs
, "1.8.0", Some(29720), None
),
70 /// Allows `#[deprecated]` attribute.
71 (accepted
, deprecated
, "1.9.0", Some(29935), None
),
72 /// Allows macros to appear in the type position.
73 (accepted
, type_macros
, "1.13.0", Some(27245), None
),
74 /// Allows use of the postfix `?` operator in expressions.
75 (accepted
, question_mark
, "1.13.0", Some(31436), None
),
76 /// Allows `..` in tuple (struct) patterns.
77 (accepted
, dotdot_in_tuple_patterns
, "1.14.0", Some(33627), None
),
78 /// Allows some increased flexibility in the name resolution rules,
79 /// especially around globs and shadowing (RFC 1560).
80 (accepted
, item_like_imports
, "1.15.0", Some(35120), None
),
81 /// Allows using `Self` and associated types in struct expressions and patterns.
82 (accepted
, more_struct_aliases
, "1.16.0", Some(37544), None
),
83 /// Allows elision of `'static` lifetimes in `static`s and `const`s.
84 (accepted
, static_in_const
, "1.17.0", Some(35897), None
),
85 /// Allows field shorthands (`x` meaning `x: x`) in struct literal expressions.
86 (accepted
, field_init_shorthand
, "1.17.0", Some(37340), None
),
87 /// Allows the definition recursive static items.
88 (accepted
, static_recursion
, "1.17.0", Some(29719), None
),
89 /// Allows `pub(restricted)` visibilities (RFC 1422).
90 (accepted
, pub_restricted
, "1.18.0", Some(32409), None
),
91 /// Allows `#![windows_subsystem]`.
92 (accepted
, windows_subsystem
, "1.18.0", Some(37499), None
),
93 /// Allows `break {expr}` with a value inside `loop`s.
94 (accepted
, loop_break_value
, "1.19.0", Some(37339), None
),
95 /// Allows numeric fields in struct expressions and patterns.
96 (accepted
, relaxed_adts
, "1.19.0", Some(35626), None
),
97 /// Allows coercing non capturing closures to function pointers.
98 (accepted
, closure_to_fn_coercion
, "1.19.0", Some(39817), None
),
99 /// Allows attributes on struct literal fields.
100 (accepted
, struct_field_attributes
, "1.20.0", Some(38814), None
),
101 /// Allows the definition of associated constants in `trait` or `impl` blocks.
102 (accepted
, associated_consts
, "1.20.0", Some(29646), None
),
103 /// Allows usage of the `compile_error!` macro.
104 (accepted
, compile_error
, "1.20.0", Some(40872), None
),
105 /// Allows code like `let x: &'static u32 = &42` to work (RFC 1414).
106 (accepted
, rvalue_static_promotion
, "1.21.0", Some(38865), None
),
107 /// Allows `Drop` types in constants (RFC 1440).
108 (accepted
, drop_types_in_const
, "1.22.0", Some(33156), None
),
109 /// Allows the sysV64 ABI to be specified on all platforms
110 /// instead of just the platforms on which it is the C ABI.
111 (accepted
, abi_sysv64
, "1.24.0", Some(36167), None
),
112 /// Allows `repr(align(16))` struct attribute (RFC 1358).
113 (accepted
, repr_align
, "1.25.0", Some(33626), None
),
114 /// Allows '|' at beginning of match arms (RFC 1925).
115 (accepted
, match_beginning_vert
, "1.25.0", Some(44101), None
),
116 /// Allows nested groups in `use` items (RFC 2128).
117 (accepted
, use_nested_groups
, "1.25.0", Some(44494), None
),
118 /// Allows indexing into constant arrays.
119 (accepted
, const_indexing
, "1.26.0", Some(29947), None
),
120 /// Allows using `a..=b` and `..=b` as inclusive range syntaxes.
121 (accepted
, inclusive_range_syntax
, "1.26.0", Some(28237), None
),
122 /// Allows `..=` in patterns (RFC 1192).
123 (accepted
, dotdoteq_in_patterns
, "1.26.0", Some(28237), None
),
124 /// Allows `fn main()` with return types which implements `Termination` (RFC 1937).
125 (accepted
, termination_trait
, "1.26.0", Some(43301), None
),
126 /// Allows implementing `Clone` for closures where possible (RFC 2132).
127 (accepted
, clone_closures
, "1.26.0", Some(44490), None
),
128 /// Allows implementing `Copy` for closures where possible (RFC 2132).
129 (accepted
, copy_closures
, "1.26.0", Some(44490), None
),
130 /// Allows `impl Trait` in function arguments.
131 (accepted
, universal_impl_trait
, "1.26.0", Some(34511), None
),
132 /// Allows `impl Trait` in function return types.
133 (accepted
, conservative_impl_trait
, "1.26.0", Some(34511), None
),
134 /// Allows using the `u128` and `i128` types.
135 (accepted
, i128_type
, "1.26.0", Some(35118), None
),
136 /// Allows default match binding modes (RFC 2005).
137 (accepted
, match_default_bindings
, "1.26.0", Some(42640), None
),
138 /// Allows `'_` placeholder lifetimes.
139 (accepted
, underscore_lifetimes
, "1.26.0", Some(44524), None
),
140 /// Allows attributes on lifetime/type formal parameters in generics (RFC 1327).
141 (accepted
, generic_param_attrs
, "1.27.0", Some(48848), None
),
142 /// Allows `cfg(target_feature = "...")`.
143 (accepted
, cfg_target_feature
, "1.27.0", Some(29717), None
),
144 /// Allows `#[target_feature(...)]`.
145 (accepted
, target_feature
, "1.27.0", None
, None
),
146 /// Allows using `dyn Trait` as a syntax for trait objects.
147 (accepted
, dyn_trait
, "1.27.0", Some(44662), None
),
148 /// Allows `#[must_use]` on functions, and introduces must-use operators (RFC 1940).
149 (accepted
, fn_must_use
, "1.27.0", Some(43302), None
),
150 /// Allows use of the `:lifetime` macro fragment specifier.
151 (accepted
, macro_lifetime_matcher
, "1.27.0", Some(34303), None
),
152 /// Allows `#[test]` functions where the return type implements `Termination` (RFC 1937).
153 (accepted
, termination_trait_test
, "1.27.0", Some(48854), None
),
154 /// Allows the `#[global_allocator]` attribute.
155 (accepted
, global_allocator
, "1.28.0", Some(27389), None
),
156 /// Allows `#[repr(transparent)]` attribute on newtype structs.
157 (accepted
, repr_transparent
, "1.28.0", Some(43036), None
),
158 /// Allows procedural macros in `proc-macro` crates.
159 (accepted
, proc_macro
, "1.29.0", Some(38356), None
),
160 /// Allows `foo.rs` as an alternative to `foo/mod.rs`.
161 (accepted
, non_modrs_mods
, "1.30.0", Some(44660), None
),
162 /// Allows use of the `:vis` macro fragment specifier
163 (accepted
, macro_vis_matcher
, "1.30.0", Some(41022), None
),
164 /// Allows importing and reexporting macros with `use`,
165 /// enables macro modularization in general.
166 (accepted
, use_extern_macros
, "1.30.0", Some(35896), None
),
167 /// Allows keywords to be escaped for use as identifiers.
168 (accepted
, raw_identifiers
, "1.30.0", Some(48589), None
),
169 /// Allows attributes scoped to tools.
170 (accepted
, tool_attributes
, "1.30.0", Some(44690), None
),
171 /// Allows multi-segment paths in attributes and derives.
172 (accepted
, proc_macro_path_invoc
, "1.30.0", Some(38356), None
),
173 /// Allows all literals in attribute lists and values of key-value pairs.
174 (accepted
, attr_literals
, "1.30.0", Some(34981), None
),
175 /// Allows inferring outlives requirements (RFC 2093).
176 (accepted
, infer_outlives_requirements
, "1.30.0", Some(44493), None
),
177 /// Allows annotating functions conforming to `fn(&PanicInfo) -> !` with `#[panic_handler]`.
178 /// This defines the behavior of panics.
179 (accepted
, panic_handler
, "1.30.0", Some(44489), None
),
180 /// Allows `#[used]` to preserve symbols (see llvm.used).
181 (accepted
, used
, "1.30.0", Some(40289), None
),
182 /// Allows `crate` in paths.
183 (accepted
, crate_in_paths
, "1.30.0", Some(45477), None
),
184 /// Allows resolving absolute paths as paths from other crates.
185 (accepted
, extern_absolute_paths
, "1.30.0", Some(44660), None
),
186 /// Allows access to crate names passed via `--extern` through prelude.
187 (accepted
, extern_prelude
, "1.30.0", Some(44660), None
),
188 /// Allows parentheses in patterns.
189 (accepted
, pattern_parentheses
, "1.31.0", Some(51087), None
),
190 /// Allows the definition of `const fn` functions.
191 (accepted
, min_const_fn
, "1.31.0", Some(53555), None
),
192 /// Allows scoped lints.
193 (accepted
, tool_lints
, "1.31.0", Some(44690), None
),
194 /// Allows lifetime elision in `impl` headers. For example:
195 /// + `impl<I:Iterator> Iterator for &mut Iterator`
196 /// + `impl Debug for Foo<'_>`
197 (accepted
, impl_header_lifetime_elision
, "1.31.0", Some(15872), None
),
198 /// Allows `extern crate foo as bar;`. This puts `bar` into extern prelude.
199 (accepted
, extern_crate_item_prelude
, "1.31.0", Some(55599), None
),
200 /// Allows use of the `:literal` macro fragment specifier (RFC 1576).
201 (accepted
, macro_literal_matcher
, "1.32.0", Some(35625), None
),
202 /// Allows use of `?` as the Kleene "at most one" operator in macros.
203 (accepted
, macro_at_most_once_rep
, "1.32.0", Some(48075), None
),
204 /// Allows `Self` struct constructor (RFC 2302).
205 (accepted
, self_struct_ctor
, "1.32.0", Some(51994), None
),
206 /// Allows `Self` in type definitions (RFC 2300).
207 (accepted
, self_in_typedefs
, "1.32.0", Some(49303), None
),
208 /// Allows `use x::y;` to search `x` in the current scope.
209 (accepted
, uniform_paths
, "1.32.0", Some(53130), None
),
210 /// Allows integer match exhaustiveness checking (RFC 2591).
211 (accepted
, exhaustive_integer_patterns
, "1.33.0", Some(50907), None
),
212 /// Allows `use path as _;` and `extern crate c as _;`.
213 (accepted
, underscore_imports
, "1.33.0", Some(48216), None
),
214 /// Allows `#[repr(packed(N))]` attribute on structs.
215 (accepted
, repr_packed
, "1.33.0", Some(33158), None
),
216 /// Allows irrefutable patterns in `if let` and `while let` statements (RFC 2086).
217 (accepted
, irrefutable_let_patterns
, "1.33.0", Some(44495), None
),
218 /// Allows calling `const unsafe fn` inside `unsafe` blocks in `const fn` functions.
219 (accepted
, min_const_unsafe_fn
, "1.33.0", Some(55607), None
),
220 /// Allows let bindings, assignments and destructuring in `const` functions and constants.
221 /// As long as control flow is not implemented in const eval, `&&` and `||` may not be used
222 /// at the same time as let bindings.
223 (accepted
, const_let
, "1.33.0", Some(48821), None
),
224 /// Allows `#[cfg_attr(predicate, multiple, attributes, here)]`.
225 (accepted
, cfg_attr_multi
, "1.33.0", Some(54881), None
),
226 /// Allows top level or-patterns (`p | q`) in `if let` and `while let`.
227 (accepted
, if_while_or_patterns
, "1.33.0", Some(48215), None
),
228 /// Allows `cfg(target_vendor = "...")`.
229 (accepted
, cfg_target_vendor
, "1.33.0", Some(29718), None
),
230 /// Allows `extern crate self as foo;`.
231 /// This puts local crate root into extern prelude under name `foo`.
232 (accepted
, extern_crate_self
, "1.34.0", Some(56409), None
),
233 /// Allows arbitrary delimited token streams in non-macro attributes.
234 (accepted
, unrestricted_attribute_tokens
, "1.34.0", Some(55208), None
),
235 /// Allows paths to enum variants on type aliases including `Self`.
236 (accepted
, type_alias_enum_variants
, "1.37.0", Some(49683), None
),
237 /// Allows using `#[repr(align(X))]` on enums with equivalent semantics
238 /// to wrapping an enum in a wrapper struct with `#[repr(align(X))]`.
239 (accepted
, repr_align_enum
, "1.37.0", Some(57996), None
),
240 /// Allows `const _: TYPE = VALUE`.
241 (accepted
, underscore_const_names
, "1.37.0", Some(54912), None
),
242 /// Allows free and inherent `async fn`s, `async` blocks, and `<expr>.await` expressions.
243 (accepted
, async_await
, "1.39.0", Some(50547), None
),
244 /// Allows mixing bind-by-move in patterns and references to those identifiers in guards.
245 (accepted
, bind_by_move_pattern_guards
, "1.39.0", Some(15287), None
),
246 /// Allows attributes in formal function parameters.
247 (accepted
, param_attrs
, "1.39.0", Some(60406), None
),
248 /// Allows macro invocations in `extern {}` blocks.
249 (accepted
, macros_in_extern
, "1.40.0", Some(49476), None
),
250 /// Allows future-proofing enums/structs with the `#[non_exhaustive]` attribute (RFC 2008).
251 (accepted
, non_exhaustive
, "1.40.0", Some(44109), None
),
252 /// Allows calling constructor functions in `const fn`.
253 (accepted
, const_constructor
, "1.40.0", Some(61456), None
),
254 /// Allows the use of `#[cfg(doctest)]`, set when rustdoc is collecting doctests.
255 (accepted
, cfg_doctest
, "1.40.0", Some(62210), None
),
256 /// Allows relaxing the coherence rules such that
257 /// `impl<T> ForeignTrait<LocalType> for ForeignType<T>` is permitted.
258 (accepted
, re_rebalance_coherence
, "1.41.0", Some(55437), None
),
260 // -------------------------------------------------------------------------
261 // feature-group-end: accepted features
262 // -------------------------------------------------------------------------