Auto merge of - nnethercote:rustc-features-more, r=Nilstrieb

Cleanup `rustc_features` some more

The sequel to .

r? `@Nilstrieb`
This commit is contained in:
bors 2023-10-16 14:34:53 +00:00
commit 98c1e3d95b
14 changed files with 254 additions and 292 deletions
compiler
rustc_ast_passes/src
rustc_const_eval/src/transform/check_consts
rustc_expand/src
rustc_feature/src
rustc_lint/src
rustc_passes/src
rustc_session/src
rustc_target/src/spec
src/tools/tidy/src

View File

@ -658,7 +658,7 @@ fn check_incompatible_features(sess: &Session, features: &Features) {
for (f1, f2) in rustc_feature::INCOMPATIBLE_FEATURES
.iter()
.filter(|&&(f1, f2)| features.enabled(f1) && features.enabled(f2))
.filter(|&&(f1, f2)| features.active(f1) && features.active(f2))
{
if let Some((f1_name, f1_span)) = declared_features.clone().find(|(name, _)| name == f1) {
if let Some((f2_name, f2_span)) = declared_features.clone().find(|(name, _)| name == f2)

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@ -323,7 +323,7 @@ impl<'mir, 'tcx> Checker<'mir, 'tcx> {
let gate = match op.status_in_item(self.ccx) {
Status::Allowed => return,
Status::Unstable(gate) if self.tcx.features().enabled(gate) => {
Status::Unstable(gate) if self.tcx.features().active(gate) => {
let unstable_in_stable = self.ccx.is_const_stable_const_fn()
&& !super::rustc_allow_const_fn_unstable(self.tcx, self.def_id(), gate);
if unstable_in_stable {

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@ -14,12 +14,12 @@ use rustc_ast::{self as ast, AttrStyle, Attribute, HasAttrs, HasTokens, MetaItem
use rustc_attr as attr;
use rustc_data_structures::flat_map_in_place::FlatMapInPlace;
use rustc_data_structures::fx::FxHashSet;
use rustc_feature::{Feature, Features, State as FeatureState};
use rustc_feature::{ACCEPTED_FEATURES, ACTIVE_FEATURES, REMOVED_FEATURES};
use rustc_feature::Features;
use rustc_feature::{ACCEPTED_FEATURES, REMOVED_FEATURES, UNSTABLE_FEATURES};
use rustc_parse::validate_attr;
use rustc_session::parse::feature_err;
use rustc_session::Session;
use rustc_span::edition::{Edition, ALL_EDITIONS};
use rustc_span::edition::ALL_EDITIONS;
use rustc_span::symbol::{sym, Symbol};
use rustc_span::Span;
use thin_vec::ThinVec;
@ -36,16 +36,6 @@ pub struct StripUnconfigured<'a> {
}
pub fn features(sess: &Session, krate_attrs: &[Attribute]) -> Features {
fn active_features_up_to(edition: Edition) -> impl Iterator<Item = &'static Feature> {
ACTIVE_FEATURES.iter().filter(move |feature| {
if let Some(feature_edition) = feature.edition {
feature_edition <= edition
} else {
false
}
})
}
fn feature_list(attr: &Attribute) -> ThinVec<ast::NestedMetaItem> {
if attr.has_name(sym::feature)
&& let Some(list) = attr.meta_item_list()
@ -83,11 +73,13 @@ pub fn features(sess: &Session, krate_attrs: &[Attribute]) -> Features {
// Enable edition-dependent features based on `features_edition`.
// - E.g. enable `test_2018_feature` if `features_edition` is 2018 or higher
let mut edition_enabled_features = FxHashSet::default();
for feature in active_features_up_to(features_edition) {
// FIXME(Manishearth) there is currently no way to set lib features by
// edition.
edition_enabled_features.insert(feature.name);
feature.set(&mut features);
for f in UNSTABLE_FEATURES {
if let Some(edition) = f.feature.edition && edition <= features_edition {
// FIXME(Manishearth) there is currently no way to set lib features by
// edition.
edition_enabled_features.insert(f.feature.name);
(f.set_enabled)(&mut features);
}
}
// Process all features declared in the code.
@ -147,19 +139,17 @@ pub fn features(sess: &Session, krate_attrs: &[Attribute]) -> Features {
}
// If the declared feature has been removed, issue an error.
if let Some(Feature { state, .. }) = REMOVED_FEATURES.iter().find(|f| name == f.name) {
if let FeatureState::Removed { reason } = state {
sess.emit_err(FeatureRemoved {
span: mi.span(),
reason: reason.map(|reason| FeatureRemovedReason { reason }),
});
continue;
}
if let Some(f) = REMOVED_FEATURES.iter().find(|f| name == f.feature.name) {
sess.emit_err(FeatureRemoved {
span: mi.span(),
reason: f.reason.map(|reason| FeatureRemovedReason { reason }),
});
continue;
}
// If the declared feature is stable, record it.
if let Some(Feature { since, .. }) = ACCEPTED_FEATURES.iter().find(|f| name == f.name) {
let since = Some(Symbol::intern(since));
if let Some(f) = ACCEPTED_FEATURES.iter().find(|f| name == f.name) {
let since = Some(Symbol::intern(f.since));
features.set_declared_lang_feature(name, mi.span(), since);
continue;
}
@ -175,8 +165,8 @@ pub fn features(sess: &Session, krate_attrs: &[Attribute]) -> Features {
}
// If the declared feature is unstable, record it.
if let Some(f) = ACTIVE_FEATURES.iter().find(|f| name == f.name) {
f.set(&mut features);
if let Some(f) = UNSTABLE_FEATURES.iter().find(|f| name == f.feature.name) {
(f.set_enabled)(&mut features);
features.set_declared_lang_feature(name, mi.span(), None);
continue;
}

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@ -1,23 +1,20 @@
//! List of the accepted feature gates.
use super::{to_nonzero, Feature, State};
use super::{to_nonzero, Feature};
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)
/// Formerly unstable features that have now been accepted (stabilized).
pub const ACCEPTED_FEATURES: &[Feature] = &[
$(
Feature {
state: State::Accepted,
name: sym::$feature,
since: $ver,
issue: to_nonzero($issue),
edition: None,
}
),+
$(Feature {
name: sym::$feature,
since: $ver,
issue: to_nonzero($issue),
edition: None,
}),+
];
}
}

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@ -16,37 +16,18 @@
#![deny(rustc::diagnostic_outside_of_impl)]
mod accepted;
mod active;
mod builtin_attrs;
mod removed;
mod unstable;
#[cfg(test)]
mod tests;
use rustc_span::{edition::Edition, symbol::Symbol};
use std::fmt;
use std::num::NonZeroU32;
#[derive(Clone, Copy)]
pub enum State {
Accepted,
Active { set: fn(&mut Features) },
Removed { reason: Option<&'static str> },
}
impl fmt::Debug for State {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
State::Accepted { .. } => write!(f, "accepted"),
State::Active { .. } => write!(f, "active"),
State::Removed { .. } => write!(f, "removed"),
}
}
}
#[derive(Debug, Clone)]
pub struct Feature {
pub state: State,
pub name: Symbol,
pub since: &'static str,
issue: Option<NonZeroU32>,
@ -63,9 +44,9 @@ pub enum Stability {
#[derive(Clone, Copy, Debug, Hash)]
pub enum UnstableFeatures {
/// Hard errors for unstable features are active, as on beta/stable channels.
/// Disallow use of unstable features, as on beta/stable channels.
Disallow,
/// Allow features to be activated, as on nightly.
/// Allow use of unstable features, as on nightly.
Allow,
/// Errors are bypassed for bootstrapping. This is required any time
/// during the build that feature-related lints are set to warn or above
@ -106,17 +87,16 @@ impl UnstableFeatures {
fn find_lang_feature_issue(feature: Symbol) -> Option<NonZeroU32> {
// Search in all the feature lists.
let found = []
.iter()
.chain(ACTIVE_FEATURES)
.chain(ACCEPTED_FEATURES)
.chain(REMOVED_FEATURES)
.find(|t| t.name == feature);
match found {
Some(found) => found.issue,
None => panic!("feature `{feature}` is not declared anywhere"),
if let Some(f) = UNSTABLE_FEATURES.iter().find(|f| f.feature.name == feature) {
return f.feature.issue;
}
if let Some(f) = ACCEPTED_FEATURES.iter().find(|f| f.name == feature) {
return f.issue;
}
if let Some(f) = REMOVED_FEATURES.iter().find(|f| f.feature.name == feature) {
return f.feature.issue;
}
panic!("feature `{feature}` is not declared anywhere");
}
const fn to_nonzero(n: Option<u32>) -> Option<NonZeroU32> {
@ -141,7 +121,6 @@ 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, is_builtin_only_local,
@ -149,3 +128,4 @@ pub use builtin_attrs::{
GatedCfg, BUILTIN_ATTRIBUTES, BUILTIN_ATTRIBUTE_MAP,
};
pub use removed::REMOVED_FEATURES;
pub use unstable::{Features, INCOMPATIBLE_FEATURES, UNSTABLE_FEATURES};

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@ -1,23 +1,28 @@
//! List of the removed feature gates.
use super::{to_nonzero, Feature, State};
use super::{to_nonzero, Feature};
use rustc_span::symbol::sym;
pub struct RemovedFeature {
pub feature: Feature,
pub reason: Option<&'static str>,
}
macro_rules! declare_features {
($(
$(#[doc = $doc:tt])* (removed, $feature:ident, $ver:expr, $issue:expr, None, $reason:expr),
)+) => {
/// Represents unstable features which have since been removed (it was once Active)
pub const REMOVED_FEATURES: &[Feature] = &[
$(
Feature {
state: State::Removed { reason: $reason },
/// Formerly unstable features that have now been removed.
pub const REMOVED_FEATURES: &[RemovedFeature] = &[
$(RemovedFeature {
feature: Feature {
name: sym::$feature,
since: $ver,
issue: to_nonzero($issue),
edition: None,
}
),+
},
reason: $reason
}),+
];
};
}

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@ -1,12 +1,17 @@
//! List of the active feature gates.
//! List of the unstable feature gates.
use super::{to_nonzero, Feature, State};
use super::{to_nonzero, Feature};
use rustc_data_structures::fx::FxHashSet;
use rustc_span::edition::Edition;
use rustc_span::symbol::{sym, Symbol};
use rustc_span::Span;
pub struct UnstableFeature {
pub feature: Feature,
pub set_enabled: fn(&mut Features),
}
#[derive(PartialEq)]
enum FeatureStatus {
Default,
@ -15,7 +20,7 @@ enum FeatureStatus {
}
macro_rules! status_to_enum {
(active) => {
(unstable) => {
FeatureStatus::Default
};
(incomplete) => {
@ -30,23 +35,20 @@ macro_rules! declare_features {
($(
$(#[doc = $doc:tt])* ($status:ident, $feature:ident, $ver:expr, $issue:expr, $edition:expr),
)+) => {
/// Represents active features that are currently being implemented or
/// currently being considered for addition/removal.
pub const ACTIVE_FEATURES:
&[Feature] =
&[$(
// (sym::$feature, $ver, $issue, $edition, set!($feature))
Feature {
state: State::Active {
// Sets this feature's corresponding bool within `features`.
set: |features| features.$feature = true,
},
/// Unstable language features that are being implemented or being
/// considered for acceptance (stabilization) or removal.
pub const UNSTABLE_FEATURES: &[UnstableFeature] = &[
$(UnstableFeature {
feature: Feature {
name: sym::$feature,
since: $ver,
issue: to_nonzero($issue),
edition: $edition,
}
),+];
},
// Sets this feature's corresponding bool within `features`.
set_enabled: |features| features.$feature = true,
}),+
];
/// A set of features to be used by later passes.
#[derive(Clone, Default, Debug)]
@ -57,7 +59,7 @@ macro_rules! declare_features {
pub declared_lib_features: Vec<(Symbol, Span)>,
/// `declared_lang_features` + `declared_lib_features`.
pub declared_features: FxHashSet<Symbol>,
/// Individual features (unstable only).
/// Active state of individual features (unstable only).
$(
$(#[doc = $doc])*
pub $feature: bool
@ -90,11 +92,11 @@ macro_rules! declare_features {
self.declared_features.contains(&feature)
}
/// Is the given feature enabled, i.e. declared or automatically
/// Is the given feature active, i.e. declared or automatically
/// enabled due to the edition?
///
/// Panics if the symbol doesn't correspond to a declared feature.
pub fn enabled(&self, feature: Symbol) -> bool {
pub fn active(&self, feature: Symbol) -> bool {
match feature {
$( sym::$feature => self.$feature, )*
@ -110,22 +112,21 @@ macro_rules! declare_features {
$(
sym::$feature => status_to_enum!($status) == FeatureStatus::Incomplete,
)*
// accepted and removed features aren't in this file but are never incomplete
// Accepted/removed features aren't in this file but are never incomplete.
_ if self.declared_features.contains(&feature) => false,
_ => panic!("`{}` was not listed in `declare_features`", feature),
}
}
/// Some features are internal to the compiler and standard library and should not
/// be used in normal projects. We warn the user about these
/// to alert them.
/// be used in normal projects. We warn the user about these to alert them.
pub fn internal(&self, feature: Symbol) -> bool {
match feature {
$(
sym::$feature => status_to_enum!($status) == FeatureStatus::Internal,
)*
// accepted and removed features aren't in this file but are never internal
// (a removed feature might have been internal, but it doesn't matter anymore)
// Accepted/removed features aren't in this file but are never internal
// (a removed feature might have been internal, but that's now irrelevant).
_ if self.declared_features.contains(&feature) => false,
_ => panic!("`{}` was not listed in `declare_features`", feature),
}
@ -134,16 +135,6 @@ macro_rules! declare_features {
};
}
impl Feature {
/// Sets this feature in `Features`. Panics if called on a non-active feature.
pub fn set(&self, features: &mut Features) {
match self.state {
State::Active { set } => set(features),
_ => panic!("called `set` on feature `{}` which is not `active`", self.name),
}
}
}
// See https://rustc-dev-guide.rust-lang.org/feature-gates.html#feature-gates for more
// documentation about handling feature gates.
//
@ -153,8 +144,7 @@ impl Feature {
// 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
// stable (active).
// was set.
//
// Note that the features are grouped into internal/user-facing and then
// sorted by version inside those groups. This is enforced with tidy.
@ -170,9 +160,9 @@ declare_features! (
// no-tracking-issue-start
/// Allows using the `unadjusted` ABI; perma-unstable.
(active, abi_unadjusted, "1.16.0", None, None),
(unstable, abi_unadjusted, "1.16.0", None, None),
/// Allows using the `vectorcall` ABI.
(active, abi_vectorcall, "1.7.0", None, None),
(unstable, abi_vectorcall, "1.7.0", None, None),
/// Allows using `#![needs_allocator]`, an implementation detail of `#[global_allocator]`.
(internal, allocator_internals, "1.20.0", None, None),
/// Allows using `#[allow_internal_unsafe]`. This is an
@ -186,21 +176,21 @@ declare_features! (
/// macros disappear).
(internal, 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),
(unstable, anonymous_lifetime_in_impl_trait, "1.63.0", None, None),
/// Allows identifying the `compiler_builtins` crate.
(internal, compiler_builtins, "1.13.0", None, None),
/// Allows writing custom MIR
(internal, custom_mir, "1.65.0", None, None),
/// Outputs useful `assert!` messages
(active, generic_assert, "1.63.0", None, None),
(unstable, generic_assert, "1.63.0", None, None),
/// Allows using the `rust-intrinsic`'s "ABI".
(internal, intrinsics, "1.0.0", None, None),
/// Allows using `#[lang = ".."]` attribute for linking items to special compiler logic.
(internal, lang_items, "1.0.0", None, None),
/// Allows `#[link(..., cfg(..))]`; perma-unstable per #37406
(active, link_cfg, "1.14.0", None, None),
(unstable, link_cfg, "1.14.0", None, None),
/// Allows the `multiple_supertrait_upcastable` lint.
(active, multiple_supertrait_upcastable, "1.69.0", None, None),
(unstable, multiple_supertrait_upcastable, "1.69.0", None, None),
/// Allow negative trait bounds. This is an internal-only feature for testing the trait solver!
(incomplete, negative_bounds, "1.71.0", None, None),
/// Allows using `#[omit_gdb_pretty_printer_section]`.
@ -222,7 +212,7 @@ declare_features! (
(internal, 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),
(unstable, 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.
// !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!!
@ -238,20 +228,20 @@ declare_features! (
/// Allows features specific to auto traits.
/// Renamed from `optin_builtin_traits`.
(active, auto_traits, "1.50.0", Some(13231), None),
(unstable, auto_traits, "1.50.0", Some(13231), None),
/// Allows using `box` in patterns (RFC 469).
(active, box_patterns, "1.0.0", Some(29641), None),
(unstable, 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),
(unstable, doc_notable_trait, "1.52.0", Some(45040), None),
/// Allows using the `may_dangle` attribute (RFC 1327).
(active, dropck_eyepatch, "1.10.0", Some(34761), None),
(unstable, dropck_eyepatch, "1.10.0", Some(34761), None),
/// Allows using the `#[fundamental]` attribute.
(active, fundamental, "1.0.0", Some(29635), None),
(unstable, fundamental, "1.0.0", Some(29635), None),
/// Allows using `#[link_name="llvm.*"]`.
(internal, link_llvm_intrinsics, "1.0.0", Some(29602), None),
/// Allows using the `#[linkage = ".."]` attribute.
(active, linkage, "1.0.0", Some(29603), None),
(unstable, linkage, "1.0.0", Some(29603), None),
/// Allows declaring with `#![needs_panic_runtime]` that a panic runtime is needed.
(internal, needs_panic_runtime, "1.10.0", Some(32837), None),
/// Allows using the `#![panic_runtime]` attribute.
@ -263,19 +253,19 @@ declare_features! (
/// purpose as `#[allow_internal_unstable]`.
(internal, 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),
(unstable, rustc_private, "1.0.0", Some(27812), None),
/// Allows using internal rustdoc features like `doc(keyword)`.
(internal, 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),
(unstable, 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),
(unstable, 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),
(unstable, structural_match, "1.8.0", Some(31434), None),
/// Allows using the `rust-call` ABI.
(active, unboxed_closures, "1.0.0", Some(29625), None),
(unstable, 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.
// !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!!
@ -291,20 +281,20 @@ declare_features! (
// 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, avx512_target_feature, "1.27.0", Some(44839), None),
(active, bpf_target_feature, "1.54.0", Some(44839), None),
(active, csky_target_feature, "1.73.0", Some(44839), None),
(active, ermsb_target_feature, "1.49.0", Some(44839), None),
(active, hexagon_target_feature, "1.27.0", Some(44839), None),
(active, mips_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),
(unstable, aarch64_ver_target_feature, "1.27.0", Some(44839), None),
(unstable, arm_target_feature, "1.27.0", Some(44839), None),
(unstable, avx512_target_feature, "1.27.0", Some(44839), None),
(unstable, bpf_target_feature, "1.54.0", Some(44839), None),
(unstable, csky_target_feature, "1.73.0", Some(44839), None),
(unstable, ermsb_target_feature, "1.49.0", Some(44839), None),
(unstable, hexagon_target_feature, "1.27.0", Some(44839), None),
(unstable, mips_target_feature, "1.27.0", Some(44839), None),
(unstable, powerpc_target_feature, "1.27.0", Some(44839), None),
(unstable, riscv_target_feature, "1.45.0", Some(44839), None),
(unstable, rtm_target_feature, "1.35.0", Some(44839), None),
(unstable, sse4a_target_feature, "1.27.0", Some(44839), None),
(unstable, tbm_target_feature, "1.27.0", Some(44839), None),
(unstable, wasm_target_feature, "1.30.0", Some(44839), None),
// !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!!
// Features are listed in alphabetical order. Tidy will fail if you don't keep it this way.
// !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!!
@ -318,155 +308,155 @@ declare_features! (
// -------------------------------------------------------------------------
/// Allows using the `amdgpu-kernel` ABI.
(active, abi_amdgpu_kernel, "1.29.0", Some(51575), None),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, abi_msp430_interrupt, "1.16.0", Some(38487), None),
/// Allows `extern "ptx-*" fn()`.
(active, abi_ptx, "1.15.0", Some(38788), None),
(unstable, abi_ptx, "1.15.0", Some(38788), None),
/// Allows `extern "riscv-interrupt-m" fn()` and `extern "riscv-interrupt-s" fn()`.
(active, abi_riscv_interrupt, "1.73.0", Some(111889), None),
(unstable, abi_riscv_interrupt, "1.73.0", Some(111889), None),
/// Allows `extern "x86-interrupt" fn()`.
(active, abi_x86_interrupt, "1.17.0", Some(40180), None),
(unstable, 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(95174), None),
/// Allows defining an `#[alloc_error_handler]`.
(active, alloc_error_handler, "1.29.0", Some(51540), None),
(unstable, alloc_error_handler, "1.29.0", Some(51540), None),
/// Allows trait methods with arbitrary self types.
(active, arbitrary_self_types, "1.23.0", Some(44874), None),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, associated_type_bounds, "1.34.0", Some(52662), None),
/// Allows associated type defaults.
(active, associated_type_defaults, "1.2.0", Some(29661), None),
(unstable, associated_type_defaults, "1.2.0", Some(29661), None),
/// Allows `async || body` closures.
(active, async_closure, "1.37.0", Some(62290), None),
(unstable, async_closure, "1.37.0", Some(62290), None),
/// Allows `#[track_caller]` on async functions.
(active, async_fn_track_caller, "1.73.0", Some(110011), None),
(unstable, async_fn_track_caller, "1.73.0", Some(110011), None),
/// Allows builtin # foo() syntax
(active, builtin_syntax, "1.71.0", Some(110680), None),
(unstable, builtin_syntax, "1.71.0", Some(110680), None),
/// Allows `c"foo"` literals.
(active, c_str_literals, "1.71.0", Some(105723), None),
(unstable, c_str_literals, "1.71.0", Some(105723), None),
/// Treat `extern "C"` function as nounwind.
(active, c_unwind, "1.52.0", Some(74990), None),
(unstable, c_unwind, "1.52.0", Some(74990), None),
/// Allows using C-variadics.
(active, c_variadic, "1.34.0", Some(44930), None),
(unstable, c_variadic, "1.34.0", Some(44930), None),
/// Allows the use of `#[cfg(overflow_checks)` to check if integer overflow behaviour.
(active, cfg_overflow_checks, "1.71.0", Some(111466), None),
(unstable, cfg_overflow_checks, "1.71.0", Some(111466), None),
/// Provides the relocation model information as cfg entry
(active, cfg_relocation_model, "1.73.0", Some(114929), None),
(unstable, cfg_relocation_model, "1.73.0", Some(114929), None),
/// Allows the use of `#[cfg(sanitize = "option")]`; set when -Zsanitizer is used.
(active, cfg_sanitize, "1.41.0", Some(39699), None),
(unstable, cfg_sanitize, "1.41.0", Some(39699), None),
/// Allows `cfg(target_abi = "...")`.
(active, cfg_target_abi, "1.55.0", Some(80970), None),
(unstable, cfg_target_abi, "1.55.0", Some(80970), None),
/// Allows `cfg(target(abi = "..."))`.
(active, cfg_target_compact, "1.63.0", Some(96901), None),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, cfg_version, "1.45.0", Some(64796), None),
/// Allows to use the `#[cfi_encoding = ""]` attribute.
(active, cfi_encoding, "1.71.0", Some(89653), None),
(unstable, cfi_encoding, "1.71.0", Some(89653), None),
/// Allows `for<...>` on closures and generators.
(active, closure_lifetime_binder, "1.64.0", Some(97362), None),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, collapse_debuginfo, "1.65.0", Some(100758), None),
/// Allows `async {}` expressions in const contexts.
(active, const_async_blocks, "1.53.0", Some(85368), None),
(unstable, 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 the definition of `const extern fn` and `const unsafe extern fn`.
(active, const_extern_fn, "1.40.0", Some(64926), None),
(unstable, 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),
(unstable, 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),
(unstable, const_for, "1.56.0", Some(87575), None),
/// Allows using `&mut` in constant functions.
(active, const_mut_refs, "1.41.0", Some(57349), None),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, const_trait_impl, "1.42.0", Some(67792), None),
/// Allows the `?` operator in const contexts.
(active, const_try, "1.56.0", Some(74935), None),
(unstable, const_try, "1.56.0", Some(74935), None),
/// Allows function attribute `#[coverage(on/off)]`, to control coverage
/// instrumentation of that function.
(active, coverage_attribute, "1.74.0", Some(84605), None),
(unstable, coverage_attribute, "1.74.0", Some(84605), None),
/// Allows users to provide classes for fenced code block using `class:classname`.
(active, custom_code_classes_in_docs, "1.74.0", Some(79483), None),
(unstable, custom_code_classes_in_docs, "1.74.0", Some(79483), None),
/// Allows non-builtin attributes in inner attribute position.
(active, custom_inner_attributes, "1.30.0", Some(54726), None),
(unstable, 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),
(unstable, custom_test_frameworks, "1.30.0", Some(50297), None),
/// Allows declarative macros 2.0 (`macro`).
(active, decl_macro, "1.17.0", Some(39412), None),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, deprecated_suggestion, "1.61.0", Some(94785), None),
/// Allows using the `#[diagnostic]` attribute tool namespace
(active, diagnostic_namespace, "1.73.0", Some(111996), None),
(unstable, diagnostic_namespace, "1.73.0", Some(111996), None),
/// Controls errors in trait implementations.
(active, do_not_recommend, "1.67.0", Some(51992), None),
(unstable, 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),
(unstable, doc_auto_cfg, "1.58.0", Some(43781), None),
/// Allows `#[doc(cfg(...))]`.
(active, doc_cfg, "1.21.0", Some(43781), None),
(unstable, doc_cfg, "1.21.0", Some(43781), None),
/// Allows `#[doc(cfg_hide(...))]`.
(active, doc_cfg_hide, "1.57.0", Some(43781), None),
(unstable, doc_cfg_hide, "1.57.0", Some(43781), None),
/// Allows `#[doc(masked)]`.
(active, doc_masked, "1.21.0", Some(44027), None),
(unstable, doc_masked, "1.21.0", Some(44027), None),
/// Allows `dyn* Trait` objects.
(incomplete, dyn_star, "1.65.0", Some(102425), None),
// Uses generic effect parameters for ~const bounds
(active, effects, "1.72.0", Some(102090), None),
(unstable, effects, "1.72.0", Some(102090), None),
/// Allows `X..Y` patterns.
(active, exclusive_range_pattern, "1.11.0", Some(37854), None),
(unstable, 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),
(unstable, exhaustive_patterns, "1.13.0", Some(51085), None),
/// Allows explicit tail calls via `become` expression.
(incomplete, explicit_tail_calls, "1.72.0", Some(112788), 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),
(unstable, extended_varargs_abi_support, "1.65.0", Some(100189), None),
/// Allows defining `extern type`s.
(active, extern_types, "1.23.0", Some(43467), None),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, fn_align, "1.53.0", Some(82232), None),
/// Allows generators to be cloned.
(active, generator_clone, "1.65.0", Some(95360), None),
(unstable, generator_clone, "1.65.0", Some(95360), None),
/// Allows defining generators.
(active, generators, "1.21.0", Some(43122), None),
(unstable, 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),
(unstable, 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
@ -474,137 +464,137 @@ declare_features! (
/// Allows generic parameters and where-clauses on free & associated const items.
(incomplete, generic_const_items, "1.73.0", Some(113521), None),
/// Allows using `..=X` as a patterns in slices.
(active, half_open_range_patterns_in_slices, "1.66.0", Some(67264), None),
(unstable, 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),
(unstable, if_let_guard, "1.47.0", Some(51114), None),
/// Allows `impl Trait` to be used inside associated types (RFC 2515).
(active, impl_trait_in_assoc_type, "1.70.0", Some(63063), None),
(unstable, 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),
(unstable, impl_trait_in_fn_trait_return, "1.64.0", Some(99697), None),
/// Allows using imported `main` function
(active, imported_main, "1.53.0", Some(28937), None),
(unstable, 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
(active, inline_const, "1.49.0", Some(76001), None),
(unstable, 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),
(unstable, intra_doc_pointers, "1.51.0", Some(80896), None),
// Allows setting the threshold for the `large_assignments` lint.
(active, large_assignments, "1.52.0", Some(83518), None),
(unstable, large_assignments, "1.52.0", Some(83518), None),
/// Allow to have type alias types for inter-crate use.
(incomplete, lazy_type_alias, "1.72.0", Some(112792), None),
/// Allows `if/while p && let q = r && ...` chains.
(active, let_chains, "1.37.0", Some(53667), None),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, must_not_suspend, "1.57.0", Some(83310), None),
/// Allows using `#[naked]` on functions.
(active, naked_functions, "1.9.0", Some(32408), None),
(unstable, 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),
(unstable, native_link_modifiers_as_needed, "1.53.0", Some(81490), None),
/// Allow negative trait implementations.
(active, negative_impls, "1.44.0", Some(68318), None),
(unstable, 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),
(unstable, 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),
(unstable, never_type_fallback, "1.41.0", Some(65992), None),
/// Allows `#![no_core]`.
(active, no_core, "1.3.0", Some(29639), None),
(unstable, no_core, "1.3.0", Some(29639), None),
/// Allows the use of `no_sanitize` attribute.
(active, no_sanitize, "1.42.0", Some(39699), None),
(unstable, 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),
(unstable, 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),
(unstable, object_safe_for_dispatch, "1.40.0", Some(43561), None),
/// Allows using `#[optimize(X)]`.
(active, optimize_attribute, "1.34.0", Some(54882), None),
(unstable, optimize_attribute, "1.34.0", Some(54882), None),
/// Allows using `#![plugin(myplugin)]`.
(active, plugin, "1.0.0", Some(29597), None),
(unstable, 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),
(unstable, 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),
(unstable, proc_macro_hygiene, "1.30.0", Some(54727), None),
/// Allows `&raw const $place_expr` and `&raw mut $place_expr` expressions.
(active, raw_ref_op, "1.41.0", Some(64490), None),
(unstable, raw_ref_op, "1.41.0", Some(64490), None),
/// Allows using the `#[register_tool]` attribute.
(active, register_tool, "1.41.0", Some(66079), None),
(unstable, 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),
(unstable, repr_simd, "1.4.0", Some(27731), 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),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, transparent_unions, "1.37.0", Some(60405), None),
/// Allows inconsistent bounds in where clauses.
(active, trivial_bounds, "1.28.0", Some(48214), None),
(unstable, trivial_bounds, "1.28.0", Some(48214), None),
/// Allows using `try {...}` expressions.
(active, try_blocks, "1.29.0", Some(31436), None),
(unstable, 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),
(unstable, 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),
(unstable, 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),
(unstable, type_changing_struct_update, "1.58.0", Some(86555), None),
/// Allows using type privacy lints (`private_interfaces`, `private_bounds`, `unnameable_types`).
(active, type_privacy_lints, "1.72.0", Some(48054), None),
(unstable, type_privacy_lints, "1.72.0", Some(48054), None),
/// Enables rustc to generate code that instructs libstd to NOT ignore SIGPIPE.
(active, unix_sigpipe, "1.65.0", Some(97889), None),
(unstable, unix_sigpipe, "1.65.0", Some(97889), None),
/// Allows unnamed fields of struct and union type
(incomplete, unnamed_fields, "1.74.0", Some(49804), None),
/// Allows unsized fn parameters.
(active, unsized_fn_params, "1.49.0", Some(48055), None),
(unstable, 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),
(unstable, 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),
(unstable, used_with_arg, "1.60.0", Some(93798), None),
/// Allows `extern "wasm" fn`
(active, wasm_abi, "1.53.0", Some(83788), None),
(unstable, wasm_abi, "1.53.0", Some(83788), None),
/// Allows `do yeet` expressions
(active, yeet_expr, "1.62.0", Some(96373), None),
(unstable, 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.
// !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!!

View File

@ -2249,7 +2249,7 @@ declare_lint! {
}
declare_lint_pass!(
/// Check for used feature gates in `INCOMPLETE_FEATURES` in `rustc_feature/src/active.rs`.
/// Check for used feature gates in `INCOMPLETE_FEATURES` in `rustc_feature/src/unstable.rs`.
IncompleteInternalFeatures => [INCOMPLETE_FEATURES, INTERNAL_FEATURES]
);

View File

@ -11,7 +11,7 @@ pub(crate) fn provide(providers: &mut Providers) {
}
fn check_expectations(tcx: TyCtxt<'_>, tool_filter: Option<Symbol>) {
if !tcx.features().enabled(sym::lint_reasons) {
if !tcx.features().active(sym::lint_reasons) {
return;
}

View File

@ -1062,7 +1062,7 @@ impl<'s, P: LintLevelsProvider> LintLevelsBuilder<'s, P> {
#[track_caller]
fn check_gated_lint(&self, lint_id: LintId, span: Span, lint_from_cli: bool) -> bool {
if let Some(feature) = lint_id.lint.feature_gate {
if !self.features.enabled(feature) {
if !self.features.active(feature) {
let lint = builtin::UNKNOWN_LINTS;
let (level, src) = self.lint_level(builtin::UNKNOWN_LINTS);
struct_lint_level(

View File

@ -86,7 +86,7 @@ impl<'tcx> CheckConstVisitor<'tcx> {
let is_feature_allowed = |feature_gate| {
// All features require that the corresponding gate be enabled,
// even if the function has `#[rustc_allow_const_fn_unstable(the_gate)]`.
if !tcx.features().enabled(feature_gate) {
if !tcx.features().active(feature_gate) {
return false;
}
@ -134,7 +134,7 @@ impl<'tcx> CheckConstVisitor<'tcx> {
let required_gates = required_gates.unwrap_or(&[]);
let missing_gates: Vec<_> =
required_gates.iter().copied().filter(|&g| !features.enabled(g)).collect();
required_gates.iter().copied().filter(|&g| !features.active(g)).collect();
match missing_gates.as_slice() {
[] => {

View File

@ -39,7 +39,7 @@ pub struct GatedSpans {
impl GatedSpans {
/// Feature gate the given `span` under the given `feature`
/// which is same `Symbol` used in `active.rs`.
/// which is same `Symbol` used in `unstable.rs`.
pub fn gate(&self, feature: Symbol, span: Span) {
self.spans.borrow_mut().entry(feature).or_default().push(span);
}
@ -78,7 +78,7 @@ impl SymbolGallery {
}
/// Construct a diagnostic for a language feature error due to the given `span`.
/// The `feature`'s `Symbol` is the one you used in `active.rs` and `rustc_span::symbols`.
/// The `feature`'s `Symbol` is the one you used in `unstable.rs` and `rustc_span::symbols`.
#[track_caller]
pub fn feature_err(
sess: &ParseSess,

View File

@ -182,7 +182,7 @@ pub fn is_enabled(
) -> Result<(), AbiDisabled> {
let s = is_stable(name);
if let Err(AbiDisabled::Unstable { feature, .. }) = s {
if features.enabled(feature) || span.allows_unstable(feature) {
if features.active(feature) || span.allows_unstable(feature) {
return Ok(());
}
}

View File

@ -30,7 +30,7 @@ const FEATURE_GROUP_END_PREFIX: &str = "// feature-group-end";
#[derive(Debug, PartialEq, Clone)]
pub enum Status {
Stable,
Accepted,
Removed,
Unstable,
}
@ -38,7 +38,7 @@ pub enum Status {
impl fmt::Display for Status {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let as_str = match *self {
Status::Stable => "stable",
Status::Accepted => "accepted",
Status::Unstable => "unstable",
Status::Removed => "removed",
};
@ -279,9 +279,9 @@ fn test_filen_gate(filen_underscore: &str, features: &mut Features) -> bool {
pub fn collect_lang_features(base_compiler_path: &Path, bad: &mut bool) -> Features {
let mut features = Features::new();
collect_lang_features_in(&mut features, base_compiler_path, "active.rs", bad);
collect_lang_features_in(&mut features, base_compiler_path, "accepted.rs", bad);
collect_lang_features_in(&mut features, base_compiler_path, "removed.rs", bad);
collect_lang_features_in(&mut features, base_compiler_path, "unstable.rs", bad);
features
}
@ -336,11 +336,11 @@ fn collect_lang_features_in(features: &mut Features, base: &Path, file: &str, ba
let mut parts = line.split(',');
let level = match parts.next().map(|l| l.trim().trim_start_matches('(')) {
Some("active") => Status::Unstable,
Some("unstable") => Status::Unstable,
Some("incomplete") => Status::Unstable,
Some("internal") => Status::Unstable,
Some("removed") => Status::Removed,
Some("accepted") => Status::Stable,
Some("accepted") => Status::Accepted,
_ => continue,
};
let name = parts.next().unwrap().trim();
@ -449,7 +449,7 @@ fn get_and_check_lib_features(
Ok((name, f)) => {
let mut check_features = |f: &Feature, list: &Features, display: &str| {
if let Some(ref s) = list.get(name) {
if f.tracking_issue != s.tracking_issue && f.level != Status::Stable {
if f.tracking_issue != s.tracking_issue && f.level != Status::Accepted {
tidy_error!(
bad,
"{}:{}: `issue` \"{}\" mismatches the {} `issue` of \"{}\"",
@ -566,7 +566,7 @@ fn map_lib_features(
let level = if line.contains("[unstable(") {
Status::Unstable
} else if line.contains("[stable(") {
Status::Stable
Status::Accepted
} else {
continue;
};
@ -581,7 +581,7 @@ fn map_lib_features(
Some(Err(_err)) => {
err!("malformed stability attribute: can't parse `since` key");
}
None if level == Status::Stable => {
None if level == Status::Accepted => {
err!("malformed stability attribute: missing the `since` key");
}
None => None,