use super::{to_nonzero, Feature, State};
+use rustc_data_structures::fx::FxHashSet;
use rustc_span::edition::Edition;
use rustc_span::symbol::{sym, Symbol};
use rustc_span::Span;
since: $ver,
issue: to_nonzero($issue),
edition: $edition,
- description: concat!($($doc,)*),
}
),+];
pub declared_lang_features: Vec<(Symbol, Span, Option<Symbol>)>,
/// `#![feature]` attrs for non-language (library) features.
pub declared_lib_features: Vec<(Symbol, Span)>,
+ /// Features enabled for this crate.
+ pub active_features: FxHashSet<Symbol>,
$(
$(#[doc = $doc])*
pub $feature: bool
$(f(stringify!($feature), self.$feature);)+
}
+ /// Is the given feature active?
+ pub fn active(&self, feature: Symbol) -> bool {
+ self.active_features.contains(&feature)
+ }
+
/// Is the given feature enabled?
///
/// Panics if the symbol doesn't correspond to a declared feature.
}
}
- 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.
}
}
+// See https://rustc-dev-guide.rust-lang.org/feature-gates.html#feature-gates for more
+// documentation about handling feature gates.
+//
// If you change this, please modify `src/doc/unstable-book` as well.
//
-// Don't ever remove anything from this list; move them to `removed.rs`.
+// Don't ever remove anything from this list; move them to `accepted.rs` if
+// accepted or `removed.rs` if removed.
//
// The version numbers here correspond to the version in which the current status
// was set. This is most important for knowing when a particular feature became
#[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 using anonymous lifetimes in argument-position impl-trait.
+ (active, anonymous_lifetime_in_impl_trait, "1.63.0", 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 writing custom MIR
+ (active, custom_mir, "1.65.0", None, None),
+ /// Outputs useful `assert!` messages
+ (active, generic_assert, "1.63.0", 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 `#[link(..., cfg(..))]`; perma-unstable per #37406
+ (active, link_cfg, "1.14.0", None, None),
+ /// Allows the `multiple_supertrait_upcastable` lint.
+ (active, multiple_supertrait_upcastable, "1.69.0", 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)),
+ /// Added for testing unstable lints; perma-unstable.
+ (active, test_unstable_lint, "1.60.0", None, None),
+ /// Allows non-`unsafe` —and thus, unsound— access to `Pin` constructions.
+ /// Marked `incomplete` since perma-unstable and unsound.
+ (incomplete, unsafe_pin_internals, "1.60.0", None, None),
+ /// Use for stable + negative coherence and strict coherence depending on trait's
+ /// rustc_strict_coherence value.
+ (active, with_negative_coherence, "1.60.0", None, None),
+ // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!!
+ // 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 `#[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 `+bundled,+whole-archive` native libs.
+ (active, packed_bundled_libs, "1.69.0", Some(108081), 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(keyword)`.
+ (active, rustdoc_internals, "1.58.0", Some(90418), None),
+ /// Allows using the `rustdoc::missing_doc_code_examples` lint
+ (active, rustdoc_missing_doc_code_examples, "1.31.0", Some(101730), 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
// FIXME: Document these and merge with the list below.
// Unstable `#[target_feature]` directives.
+ (active, aarch64_ver_target_feature, "1.27.0", Some(44839), None),
(active, arm_target_feature, "1.27.0", Some(44839), None),
- (active, aarch64_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, ermsb_target_feature, "1.49.0", 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, 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)
// 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 `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 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 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 additional const parameter types, such as `&'static str` or user defined types
+ (incomplete, adt_const_params, "1.56.0", Some(95174), 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 panicking during const eval (producing compile-time errors).
- (active, const_panic, "1.30.0", Some(51999), None),
-
- /// Allows `#[marker]` on certain traits allowing overlapping implementations.
- (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 trait methods with arbitrary self types.
+ (active, arbitrary_self_types, "1.23.0", Some(44874), None),
+ /// Allows using `const` operands in inline assembly.
+ (active, asm_const, "1.58.0", Some(93332), None),
+ /// Enables experimental inline assembly support for additional architectures.
+ (active, asm_experimental_arch, "1.58.0", Some(93335), None),
+ /// Allows the `may_unwind` option in inline assembly.
+ (active, asm_unwind, "1.58.0", Some(93334), 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 async functions to be declared, implemented, and used in traits.
+ (incomplete, async_fn_in_trait, "1.66.0", Some(91611), 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 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 `cfg(target_abi = "...")`.
+ (active, cfg_target_abi, "1.55.0", Some(80970), None),
+ /// Allows `cfg(target(abi = "..."))`.
+ (active, cfg_target_compact, "1.63.0", Some(96901), None),
+ /// Allows `cfg(target_has_atomic_load_store = "...")`.
+ (active, cfg_target_has_atomic, "1.60.0", Some(94039), None),
+ /// Allows `cfg(target_has_atomic_equal_alignment = "...")`.
+ (active, cfg_target_has_atomic_equal_alignment, "1.60.0", Some(93822), 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 `for<...>` on closures and generators.
+ (active, closure_lifetime_binder, "1.64.0", Some(97362), 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 use of the `#[collapse_debuginfo]` attribute.
+ (active, collapse_debuginfo, "1.65.0", Some(100758), None),
+ /// Allows `async {}` expressions in const contexts.
+ (active, const_async_blocks, "1.53.0", Some(85368), None),
+ /// Allows `const || {}` closures in const contexts.
+ (incomplete, const_closures, "1.68.0", Some(106003), 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 `for _ in _` loops in const contexts.
+ (active, const_for, "1.56.0", Some(87575), 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 `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),
-
- /// 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 `?` operator in const contexts.
+ (active, const_try, "1.56.0", Some(74935), 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 using `#[debugger_visualizer]`.
+ (active, debugger_visualizer, "1.62.0", Some(95939), None),
+ /// Allows declarative macros 2.0 (`macro`).
+ (active, decl_macro, "1.17.0", Some(39412), None),
+ /// Allows default type parameters to influence type inference.
+ (active, default_type_parameter_fallback, "1.3.0", Some(27336), None),
+ /// Allows using `#[deprecated_safe]` to deprecate the safeness of a function or trait
+ (active, deprecated_safe, "1.61.0", Some(94978), None),
+ /// Allows having using `suggestion` in the `#[deprecated]` attribute.
+ (active, deprecated_suggestion, "1.61.0", Some(94785), None),
+ /// Controls errors in trait implementations.
+ (active, do_not_recommend, "1.67.0", Some(51992), 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 `dyn* Trait` objects.
+ (incomplete, dyn_star, "1.65.0", Some(102425), 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 using `efiapi`, `sysv64` and `win64` as calling convention
+ /// for functions with varargs.
+ (active, extended_varargs_abi_support, "1.65.0", Some(100189), 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 `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 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 generators to be cloned.
+ (active, generator_clone, "1.65.0", Some(95360), 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),
+ /// An extension to the `generic_associated_types` feature, allowing incomplete features.
+ (incomplete, generic_associated_types_extended, "1.61.0", Some(95451), 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` as a patterns in slices.
+ (active, half_open_range_patterns_in_slices, "1.66.0", Some(67264), None),
/// Allows `if let` guard in match arms.
(active, if_let_guard, "1.47.0", Some(51114), 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 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),
-
+ /// Allows `impl Trait` to be used inside associated types (RFC 2515).
+ (active, impl_trait_in_assoc_type, "1.70.0", Some(63063), None),
+ /// Allows `impl Trait` as output type in `Fn` traits in return position of functions.
+ (active, impl_trait_in_fn_trait_return, "1.64.0", Some(99697), None),
+ /// Allows referencing `Self` and projections in impl-trait.
+ (active, impl_trait_projections, "1.67.0", Some(103532), None),
+ /// Allows using imported `main` function
+ (active, imported_main, "1.53.0", Some(28937), 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
- (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 references to types with interior mutability within constants
- (active, const_refs_to_cell, "1.51.0", Some(80384), None),
-
+ (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 `extern "C-cmse-nonsecure-call" fn()`.
- (active, abi_c_cmse_nonsecure_call, "1.51.0", Some(81391), None),
-
- /// Lessens the requirements for structs to implement `Unsize`.
- (active, relaxed_struct_unsize, "1.51.0", Some(81793), None),
-
- /// Allows macro attributes to observe output of `#[derive]`.
- (active, macro_attributes_in_derive_output, "1.51.0", Some(81119), 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 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 `if/while p && let q = r && ...` chains.
+ (active, let_chains, "1.37.0", Some(53667), None),
+ /// Allows using `reason` in lint attributes and the `#[expect(lint)]` lint check.
+ (active, lint_reasons, "1.31.0", Some(54503), None),
+ /// Give access to additional metadata about declarative macro meta-variables.
+ (active, macro_metavar_expr, "1.61.0", Some(83527), 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 the as-needed link modifier
+ (active, native_link_modifiers_as_needed, "1.53.0", Some(81490), 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 `#![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 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 using imported `main` function
- (active, imported_main, "1.53.0", Some(28937), None),
-
- /// Allows specifying modifiers in the link attribute: `#[link(modifiers = "...")]`
- (active, native_link_modifiers, "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),
-
- /// 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 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 `for<T>` binders in where-clauses
+ (incomplete, non_lifetime_binders, "1.69.0", Some(108185), 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).
+ (active, raw_dylib, "1.65.0", 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_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 return-position `impl Trait` in traits.
+ (incomplete, return_position_impl_trait_in_trait, "1.65.0", Some(91611), None),
+ /// Allows bounding the return type of AFIT/RPITIT.
+ (incomplete, return_type_notation, "1.70.0", Some(109417), None),
+ /// Allows `extern "rust-cold"`.
+ (active, rust_cold_cc, "1.63.0", Some(97544), 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 attributes on expressions and non-item statements.
+ (active, stmt_expr_attributes, "1.6.0", Some(15701), None),
+ /// Allows lints part of the strict provenance effort.
+ (active, strict_provenance, "1.61.0", Some(95228), None),
+ /// Allows string patterns to dereference values to match them.
+ (active, string_deref_patterns, "1.67.0", Some(87121), 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 dyn upcasting trait objects via supertraits.
+ /// Dyn upcasting is casting, e.g., `dyn Foo -> dyn Bar` where `Foo: Bar`.
+ (active, trait_upcasting, "1.56.0", Some(65991), None),
+ /// Allows for transmuting between arrays with sizes that contain generic consts.
+ (active, transmute_generic_consts, "1.70.0", Some(109929), 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)
+ (active, type_changing_struct_update, "1.58.0", Some(86555), None),
+ /// Enables rustc to generate code that instructs libstd to NOT ignore SIGPIPE.
+ (active, unix_sigpipe, "1.65.0", Some(97889), 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 using the `#[used(linker)]` (or `#[used(compiler)]`) attribute.
+ (active, used_with_arg, "1.60.0", Some(93798), None),
+ /// Allows `extern "wasm" fn`
+ (active, wasm_abi, "1.53.0", Some(83788), None),
+ /// Allows `do yeet` expressions
+ (active, yeet_expr, "1.62.0", Some(96373), None),
+ // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!!
+ // Features are listed in alphabetical order. Tidy will fail if you don't keep it this way.
+ // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!!
// -------------------------------------------------------------------------
// feature-group-end: actual feature gates
projects / rustc.git / blobdiff