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e1599b0c XL |
1 | //! List of the accepted feature gates. |
2 | ||
3 | use crate::symbol::sym; | |
4 | use super::{State, Feature}; | |
5 | ||
6 | macro_rules! declare_features { | |
7 | ($( | |
8 | $(#[doc = $doc:tt])* (accepted, $feature:ident, $ver:expr, $issue:expr, None), | |
9 | )+) => { | |
10 | /// Those language feature has since been Accepted (it was once Active) | |
11 | pub const ACCEPTED_FEATURES: &[Feature] = &[ | |
12 | $( | |
13 | Feature { | |
14 | state: State::Accepted, | |
15 | name: sym::$feature, | |
16 | since: $ver, | |
17 | issue: $issue, | |
18 | edition: None, | |
19 | description: concat!($($doc,)*), | |
20 | } | |
21 | ),+ | |
22 | ]; | |
23 | } | |
24 | } | |
25 | ||
26 | declare_features! ( | |
27 | // ------------------------------------------------------------------------- | |
28 | // feature-group-start: for testing purposes | |
29 | // ------------------------------------------------------------------------- | |
30 | ||
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), | |
37 | ||
38 | // ------------------------------------------------------------------------- | |
39 | // feature-group-end: for testing purposes | |
40 | // ------------------------------------------------------------------------- | |
41 | ||
42 | // ------------------------------------------------------------------------- | |
43 | // feature-group-start: accepted features | |
44 | // ------------------------------------------------------------------------- | |
45 | ||
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), | |
e74abb32 XL |
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), | |
e1599b0c XL |
256 | |
257 | // ------------------------------------------------------------------------- | |
258 | // feature-group-end: accepted features | |
259 | // ------------------------------------------------------------------------- | |
260 | ); |