diff options
Diffstat (limited to 'compiler/rustc_feature/src')
| -rw-r--r-- | compiler/rustc_feature/src/accepted.rs | 4 | ||||
| -rw-r--r-- | compiler/rustc_feature/src/builtin_attrs.rs | 283 | ||||
| -rw-r--r-- | compiler/rustc_feature/src/lib.rs | 13 | ||||
| -rw-r--r-- | compiler/rustc_feature/src/removed.rs | 201 | ||||
| -rw-r--r-- | compiler/rustc_feature/src/unstable.rs | 22 |
5 files changed, 299 insertions, 224 deletions
diff --git a/compiler/rustc_feature/src/accepted.rs b/compiler/rustc_feature/src/accepted.rs index 10c5cb194f4..cfe0f4e5d6c 100644 --- a/compiler/rustc_feature/src/accepted.rs +++ b/compiler/rustc_feature/src/accepted.rs @@ -220,6 +220,8 @@ declare_features! ( (accepted, fn_must_use, "1.27.0", Some(43302)), /// Allows capturing variables in scope using format_args! (accepted, format_args_capture, "1.58.0", Some(67984)), + /// Infer generic args for both consts and types. + (accepted, generic_arg_infer, "CURRENT_RUSTC_VERSION", Some(85077)), /// Allows associated types to be generic, e.g., `type Foo<T>;` (RFC 1598). (accepted, generic_associated_types, "1.65.0", Some(44265)), /// Allows attributes on lifetime/type formal parameters in generics (RFC 1327). @@ -259,6 +261,8 @@ declare_features! ( /// Allows some increased flexibility in the name resolution rules, /// especially around globs and shadowing (RFC 1560). (accepted, item_like_imports, "1.15.0", Some(35120)), + // Allows using the `kl` and `widekl` target features and the associated intrinsics + (accepted, keylocker_x86, "CURRENT_RUSTC_VERSION", Some(134813)), /// Allows `'a: { break 'a; }`. (accepted, label_break_value, "1.65.0", Some(48594)), /// Allows `let...else` statements. diff --git a/compiler/rustc_feature/src/builtin_attrs.rs b/compiler/rustc_feature/src/builtin_attrs.rs index c117e0fcf7c..7d9915d7f68 100644 --- a/compiler/rustc_feature/src/builtin_attrs.rs +++ b/compiler/rustc_feature/src/builtin_attrs.rs @@ -5,11 +5,12 @@ use std::sync::LazyLock; use AttributeDuplicates::*; use AttributeGate::*; use AttributeType::*; +use rustc_attr_data_structures::EncodeCrossCrate; use rustc_data_structures::fx::FxHashMap; use rustc_span::edition::Edition; use rustc_span::{Symbol, sym}; -use crate::{Features, Stability}; +use crate::Features; type GateFn = fn(&Features) -> bool; @@ -94,34 +95,24 @@ pub enum AttributeSafety { Unsafe { unsafe_since: Option<Edition> }, } -#[derive(Clone, Copy)] +#[derive(Clone, Debug, Copy)] pub enum AttributeGate { - /// Is gated by a given feature gate, reason - /// and function to check if enabled - Gated(Stability, Symbol, &'static str, fn(&Features) -> bool), - + /// A gated attribute which requires a feature gate to be enabled. + Gated { + /// The feature gate, for example `#![feature(rustc_attrs)]` for rustc_* attributes. + feature: Symbol, + /// The error message displayed when an attempt is made to use the attribute without its feature gate. + message: &'static str, + /// Check function to be called during the `PostExpansionVisitor` pass. + check: fn(&Features) -> bool, + /// Notes to be displayed when an attempt is made to use the attribute without its feature gate. + notes: &'static [&'static str], + }, /// Ungated attribute, can be used on all release channels Ungated, } -// fn() is not Debug -impl std::fmt::Debug for AttributeGate { - fn fmt(&self, fmt: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { - match *self { - Self::Gated(ref stab, name, expl, _) => { - write!(fmt, "Gated({stab:?}, {name}, {expl})") - } - Self::Ungated => write!(fmt, "Ungated"), - } - } -} - -impl AttributeGate { - fn is_deprecated(&self) -> bool { - matches!(*self, Self::Gated(Stability::Deprecated(_, _), ..)) - } -} - +// FIXME(jdonszelmann): move to rustc_attr_data_structures /// A template that the attribute input must match. /// Only top-level shape (`#[attr]` vs `#[attr(...)]` vs `#[attr = ...]`) is considered now. #[derive(Clone, Copy, Default)] @@ -138,6 +129,26 @@ pub struct AttributeTemplate { pub name_value_str: Option<&'static str>, } +impl AttributeTemplate { + pub fn suggestions(&self, inner: bool, name: impl std::fmt::Display) -> Vec<String> { + let mut suggestions = vec![]; + let inner = if inner { "!" } else { "" }; + if self.word { + suggestions.push(format!("#{inner}[{name}]")); + } + if let Some(descr) = self.list { + suggestions.push(format!("#{inner}[{name}({descr})]")); + } + suggestions.extend(self.one_of.iter().map(|&word| format!("#{inner}[{name}({word})]"))); + if let Some(descr) = self.name_value_str { + suggestions.push(format!("#{inner}[{name} = \"{descr}\"]")); + } + suggestions.sort(); + + suggestions + } +} + /// How to handle multiple duplicate attributes on the same item. #[derive(Clone, Copy, Default)] pub enum AttributeDuplicates { @@ -192,20 +203,21 @@ pub enum AttributeDuplicates { /// A convenience macro for constructing attribute templates. /// E.g., `template!(Word, List: "description")` means that the attribute /// supports forms `#[attr]` and `#[attr(description)]`. +#[macro_export] macro_rules! template { - (Word) => { template!(@ true, None, &[], None) }; - (List: $descr: expr) => { template!(@ false, Some($descr), &[], None) }; - (OneOf: $one_of: expr) => { template!(@ false, None, $one_of, None) }; - (NameValueStr: $descr: expr) => { template!(@ false, None, &[], Some($descr)) }; - (Word, List: $descr: expr) => { template!(@ true, Some($descr), &[], None) }; - (Word, NameValueStr: $descr: expr) => { template!(@ true, None, &[], Some($descr)) }; + (Word) => { $crate::template!(@ true, None, &[], None) }; + (List: $descr: expr) => { $crate::template!(@ false, Some($descr), &[], None) }; + (OneOf: $one_of: expr) => { $crate::template!(@ false, None, $one_of, None) }; + (NameValueStr: $descr: expr) => { $crate::template!(@ false, None, &[], Some($descr)) }; + (Word, List: $descr: expr) => { $crate::template!(@ true, Some($descr), &[], None) }; + (Word, NameValueStr: $descr: expr) => { $crate::template!(@ true, None, &[], Some($descr)) }; (List: $descr1: expr, NameValueStr: $descr2: expr) => { - template!(@ false, Some($descr1), &[], Some($descr2)) + $crate::template!(@ false, Some($descr1), &[], Some($descr2)) }; (Word, List: $descr1: expr, NameValueStr: $descr2: expr) => { - template!(@ true, Some($descr1), &[], Some($descr2)) + $crate::template!(@ true, Some($descr1), &[], Some($descr2)) }; - (@ $word: expr, $list: expr, $one_of: expr, $name_value_str: expr) => { AttributeTemplate { + (@ $word: expr, $list: expr, $one_of: expr, $name_value_str: expr) => { $crate::AttributeTemplate { word: $word, list: $list, one_of: $one_of, name_value_str: $name_value_str } }; } @@ -247,7 +259,7 @@ macro_rules! ungated { } macro_rules! gated { - (unsafe $attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr, $gate:ident, $msg:expr $(,)?) => { + (unsafe $attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr, $gate:ident, $message:expr $(,)?) => { BuiltinAttribute { name: sym::$attr, encode_cross_crate: $encode_cross_crate, @@ -255,10 +267,15 @@ macro_rules! gated { safety: AttributeSafety::Unsafe { unsafe_since: None }, template: $tpl, duplicates: $duplicates, - gate: Gated(Stability::Unstable, sym::$gate, $msg, Features::$gate), + gate: Gated { + feature: sym::$gate, + message: $message, + check: Features::$gate, + notes: &[], + }, } }; - (unsafe $attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr, $msg:expr $(,)?) => { + (unsafe $attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr, $message:expr $(,)?) => { BuiltinAttribute { name: sym::$attr, encode_cross_crate: $encode_cross_crate, @@ -266,10 +283,15 @@ macro_rules! gated { safety: AttributeSafety::Unsafe { unsafe_since: None }, template: $tpl, duplicates: $duplicates, - gate: Gated(Stability::Unstable, sym::$attr, $msg, Features::$attr), + gate: Gated { + feature: sym::$attr, + message: $message, + check: Features::$attr, + notes: &[], + }, } }; - ($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr, $gate:ident, $msg:expr $(,)?) => { + ($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr, $gate:ident, $message:expr $(,)?) => { BuiltinAttribute { name: sym::$attr, encode_cross_crate: $encode_cross_crate, @@ -277,10 +299,15 @@ macro_rules! gated { safety: AttributeSafety::Normal, template: $tpl, duplicates: $duplicates, - gate: Gated(Stability::Unstable, sym::$gate, $msg, Features::$gate), + gate: Gated { + feature: sym::$gate, + message: $message, + check: Features::$gate, + notes: &[], + }, } }; - ($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr, $msg:expr $(,)?) => { + ($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr, $message:expr $(,)?) => { BuiltinAttribute { name: sym::$attr, encode_cross_crate: $encode_cross_crate, @@ -288,7 +315,12 @@ macro_rules! gated { safety: AttributeSafety::Normal, template: $tpl, duplicates: $duplicates, - gate: Gated(Stability::Unstable, sym::$attr, $msg, Features::$attr), + gate: Gated { + feature: sym::$attr, + message: $message, + check: Features::$attr, + notes: &[], + }, } }; } @@ -304,12 +336,11 @@ macro_rules! rustc_attr { concat!( "the `#[", stringify!($attr), - "]` attribute is just used for rustc unit tests \ - and will never be stable", + "]` attribute is used for rustc unit tests" ), ) }; - ($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr, $msg:expr $(,)?) => { + ($attr:ident, $typ:expr, $tpl:expr, $duplicates:expr, $encode_cross_crate:expr, $($notes:expr),* $(,)?) => { BuiltinAttribute { name: sym::$attr, encode_cross_crate: $encode_cross_crate, @@ -317,7 +348,17 @@ macro_rules! rustc_attr { safety: AttributeSafety::Normal, template: $tpl, duplicates: $duplicates, - gate: Gated(Stability::Unstable, sym::rustc_attrs, $msg, Features::rustc_attrs), + gate: Gated { + feature: sym::rustc_attrs, + message: "use of an internal attribute", + check: Features::rustc_attrs, + notes: &[ + concat!("the `#[", + stringify!($attr), + "]` attribute is an internal implementation detail that will never be stable"), + $($notes),* + ] + }, } }; } @@ -328,15 +369,6 @@ macro_rules! experimental { }; } -const IMPL_DETAIL: &str = "internal implementation detail"; -const INTERNAL_UNSTABLE: &str = "this is an internal attribute that will never be stable"; - -#[derive(PartialEq)] -pub enum EncodeCrossCrate { - Yes, - No, -} - pub struct BuiltinAttribute { pub name: Symbol, /// Whether this attribute is encode cross crate. @@ -458,6 +490,7 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ ), ungated!(no_link, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No), ungated!(repr, Normal, template!(List: "C"), DuplicatesOk, EncodeCrossCrate::No), + gated!(align, Normal, template!(List: "alignment"), DuplicatesOk, EncodeCrossCrate::No, fn_align, experimental!(align)), ungated!(unsafe(Edition2024) export_name, Normal, template!(NameValueStr: "name"), FutureWarnPreceding, EncodeCrossCrate::No), ungated!(unsafe(Edition2024) link_section, Normal, template!(NameValueStr: "name"), FutureWarnPreceding, EncodeCrossCrate::No), ungated!(unsafe(Edition2024) no_mangle, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No), @@ -619,6 +652,19 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ EncodeCrossCrate::Yes, min_generic_const_args, experimental!(type_const), ), + // The `#[loop_match]` and `#[const_continue]` attributes are part of the + // lang experiment for RFC 3720 tracked in: + // + // - https://github.com/rust-lang/rust/issues/132306 + gated!( + const_continue, Normal, template!(Word), ErrorFollowing, + EncodeCrossCrate::No, loop_match, experimental!(const_continue) + ), + gated!( + loop_match, Normal, template!(Word), ErrorFollowing, + EncodeCrossCrate::No, loop_match, experimental!(loop_match) + ), + // ========================================================================== // Internal attributes: Stability, deprecation, and unsafe: // ========================================================================== @@ -668,11 +714,11 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ rustc_attr!( rustc_deprecated_safe_2024, Normal, template!(List: r#"audit_that = "...""#), ErrorFollowing, EncodeCrossCrate::Yes, - "rustc_deprecated_safe_2024 is supposed to be used in libstd only", + "`#[rustc_deprecated_safe_2024]` is used to declare functions unsafe across the edition 2024 boundary", ), rustc_attr!( rustc_pub_transparent, Normal, template!(Word), - WarnFollowing, EncodeCrossCrate::Yes, + ErrorFollowing, EncodeCrossCrate::Yes, "used internally to mark types with a `transparent` representation when it is guaranteed by the documentation", ), @@ -695,7 +741,7 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ ErrorFollowing, EncodeCrossCrate::No, "`rustc_never_type_options` is used to experiment with never type fallback and work on \ - never type stabilization, and will never be stable" + never type stabilization" ), // ========================================================================== @@ -704,23 +750,23 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ rustc_attr!( rustc_allocator, Normal, template!(Word), WarnFollowing, - EncodeCrossCrate::No, IMPL_DETAIL + EncodeCrossCrate::No, ), rustc_attr!( rustc_nounwind, Normal, template!(Word), WarnFollowing, - EncodeCrossCrate::No, IMPL_DETAIL + EncodeCrossCrate::No, ), rustc_attr!( rustc_reallocator, Normal, template!(Word), WarnFollowing, - EncodeCrossCrate::No, IMPL_DETAIL + EncodeCrossCrate::No, ), rustc_attr!( rustc_deallocator, Normal, template!(Word), WarnFollowing, - EncodeCrossCrate::No, IMPL_DETAIL + EncodeCrossCrate::No, ), rustc_attr!( rustc_allocator_zeroed, Normal, template!(Word), WarnFollowing, - EncodeCrossCrate::No, IMPL_DETAIL + EncodeCrossCrate::No, ), gated!( default_lib_allocator, Normal, template!(Word), WarnFollowing, @@ -762,7 +808,7 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ ), rustc_attr!( rustc_std_internal_symbol, Normal, template!(Word), WarnFollowing, - EncodeCrossCrate::No, INTERNAL_UNSTABLE + EncodeCrossCrate::No, ), // ========================================================================== @@ -772,11 +818,11 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ rustc_attr!( rustc_builtin_macro, Normal, template!(Word, List: "name, /*opt*/ attributes(name1, name2, ...)"), ErrorFollowing, - EncodeCrossCrate::Yes, IMPL_DETAIL + EncodeCrossCrate::Yes, ), rustc_attr!( rustc_proc_macro_decls, Normal, template!(Word), WarnFollowing, - EncodeCrossCrate::No, INTERNAL_UNSTABLE + EncodeCrossCrate::No, ), rustc_attr!( rustc_macro_transparency, Normal, @@ -786,7 +832,7 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ rustc_attr!( rustc_autodiff, Normal, template!(Word, List: r#""...""#), DuplicatesOk, - EncodeCrossCrate::Yes, INTERNAL_UNSTABLE + EncodeCrossCrate::Yes, ), // Traces that are left when `cfg` and `cfg_attr` attributes are expanded. // The attributes are not gated, to avoid stability errors, but they cannot be used in stable @@ -812,54 +858,53 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ NameValueStr: "message" ), ErrorFollowing, EncodeCrossCrate::Yes, - INTERNAL_UNSTABLE + "see `#[diagnostic::on_unimplemented]` for the stable equivalent of this attribute" ), rustc_attr!( rustc_confusables, Normal, template!(List: r#""name1", "name2", ..."#), ErrorFollowing, EncodeCrossCrate::Yes, - INTERNAL_UNSTABLE, ), // Enumerates "identity-like" conversion methods to suggest on type mismatch. rustc_attr!( rustc_conversion_suggestion, Normal, template!(Word), - WarnFollowing, EncodeCrossCrate::Yes, INTERNAL_UNSTABLE + WarnFollowing, EncodeCrossCrate::Yes, ), // Prevents field reads in the marked trait or method to be considered // during dead code analysis. rustc_attr!( rustc_trivial_field_reads, Normal, template!(Word), - WarnFollowing, EncodeCrossCrate::Yes, INTERNAL_UNSTABLE + WarnFollowing, EncodeCrossCrate::Yes, ), // Used by the `rustc::potential_query_instability` lint to warn methods which // might not be stable during incremental compilation. rustc_attr!( rustc_lint_query_instability, Normal, template!(Word), - WarnFollowing, EncodeCrossCrate::Yes, INTERNAL_UNSTABLE + WarnFollowing, EncodeCrossCrate::Yes, ), // Used by the `rustc::untracked_query_information` lint to warn methods which // might not be stable during incremental compilation. rustc_attr!( rustc_lint_untracked_query_information, Normal, template!(Word), - WarnFollowing, EncodeCrossCrate::Yes, INTERNAL_UNSTABLE + WarnFollowing, EncodeCrossCrate::Yes, ), // Used by the `rustc::diagnostic_outside_of_impl` lints to assist in changes to diagnostic // APIs. Any function with this attribute will be checked by that lint. rustc_attr!( rustc_lint_diagnostics, Normal, template!(Word), - WarnFollowing, EncodeCrossCrate::Yes, INTERNAL_UNSTABLE + WarnFollowing, EncodeCrossCrate::Yes, ), // Used by the `rustc::bad_opt_access` lint to identify `DebuggingOptions` and `CodegenOptions` // types (as well as any others in future). rustc_attr!( rustc_lint_opt_ty, Normal, template!(Word), - WarnFollowing, EncodeCrossCrate::Yes, INTERNAL_UNSTABLE + WarnFollowing, EncodeCrossCrate::Yes, ), // Used by the `rustc::bad_opt_access` lint on fields // types (as well as any others in future). rustc_attr!( rustc_lint_opt_deny_field_access, Normal, template!(List: "message"), - WarnFollowing, EncodeCrossCrate::Yes, INTERNAL_UNSTABLE + WarnFollowing, EncodeCrossCrate::Yes, ), // ========================================================================== @@ -868,28 +913,30 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ rustc_attr!( rustc_promotable, Normal, template!(Word), WarnFollowing, - EncodeCrossCrate::No, IMPL_DETAIL), + EncodeCrossCrate::No, ), rustc_attr!( rustc_legacy_const_generics, Normal, template!(List: "N"), ErrorFollowing, - EncodeCrossCrate::Yes, INTERNAL_UNSTABLE + EncodeCrossCrate::Yes, ), - // Do not const-check this function's body. It will always get replaced during CTFE. + // Do not const-check this function's body. It will always get replaced during CTFE via `hook_special_const_fn`. rustc_attr!( rustc_do_not_const_check, Normal, template!(Word), WarnFollowing, - EncodeCrossCrate::Yes, INTERNAL_UNSTABLE + EncodeCrossCrate::Yes, "`#[rustc_do_not_const_check]` skips const-check for this function's body", ), - // Ensure the argument to this function is &&str during const-check. rustc_attr!( rustc_const_panic_str, Normal, template!(Word), WarnFollowing, - EncodeCrossCrate::Yes, INTERNAL_UNSTABLE + EncodeCrossCrate::Yes, "`#[rustc_const_panic_str]` ensures the argument to this function is &&str during const-check", ), rustc_attr!( rustc_const_stable_indirect, Normal, - template!(Word), WarnFollowing, EncodeCrossCrate::No, IMPL_DETAIL, + template!(Word), + WarnFollowing, + EncodeCrossCrate::No, + "this is an internal implementation detail", ), rustc_attr!( rustc_intrinsic_const_stable_indirect, Normal, - template!(Word), WarnFollowing, EncodeCrossCrate::No, IMPL_DETAIL, + template!(Word), WarnFollowing, EncodeCrossCrate::No, "this is an internal implementation detail", ), gated!( rustc_allow_const_fn_unstable, Normal, @@ -905,21 +952,21 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ rustc_layout_scalar_valid_range_start, Normal, template!(List: "value"), ErrorFollowing, EncodeCrossCrate::Yes, "the `#[rustc_layout_scalar_valid_range_start]` attribute is just used to enable \ - niche optimizations in libcore and libstd and will never be stable", + niche optimizations in the standard library", ), rustc_attr!( rustc_layout_scalar_valid_range_end, Normal, template!(List: "value"), ErrorFollowing, EncodeCrossCrate::Yes, "the `#[rustc_layout_scalar_valid_range_end]` attribute is just used to enable \ - niche optimizations in libcore and libstd and will never be stable", + niche optimizations in the standard library", ), rustc_attr!( rustc_nonnull_optimization_guaranteed, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::Yes, "the `#[rustc_nonnull_optimization_guaranteed]` attribute is just used to document \ - guaranteed niche optimizations in libcore and libstd and will never be stable\n\ - (note that the compiler does not even check whether the type indeed is being non-null-optimized; \ - it is your responsibility to ensure that the attribute is only used on types that are optimized)", + guaranteed niche optimizations in the standard library", + "the compiler does not even check whether the type indeed is being non-null-optimized; \ + it is your responsibility to ensure that the attribute is only used on types that are optimized", ), // ========================================================================== @@ -932,17 +979,17 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ rustc_attr!( rustc_as_ptr, Normal, template!(Word), ErrorFollowing, EncodeCrossCrate::Yes, - "#[rustc_as_ptr] is used to mark functions returning pointers to their inner allocations." + "`#[rustc_as_ptr]` is used to mark functions returning pointers to their inner allocations." ), rustc_attr!( rustc_pass_by_value, Normal, template!(Word), ErrorFollowing, EncodeCrossCrate::Yes, - "#[rustc_pass_by_value] is used to mark types that must be passed by value instead of reference." + "`#[rustc_pass_by_value]` is used to mark types that must be passed by value instead of reference." ), rustc_attr!( rustc_never_returns_null_ptr, Normal, template!(Word), ErrorFollowing, EncodeCrossCrate::Yes, - "#[rustc_never_returns_null_ptr] is used to mark functions returning non-null pointers." + "`#[rustc_never_returns_null_ptr]` is used to mark functions returning non-null pointers." ), rustc_attr!( rustc_no_implicit_autorefs, AttributeType::Normal, template!(Word), ErrorFollowing, EncodeCrossCrate::Yes, @@ -950,15 +997,15 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ ), rustc_attr!( rustc_coherence_is_core, AttributeType::CrateLevel, template!(Word), ErrorFollowing, EncodeCrossCrate::No, - "#![rustc_coherence_is_core] allows inherent methods on builtin types, only intended to be used in `core`." + "`#![rustc_coherence_is_core]` allows inherent methods on builtin types, only intended to be used in `core`." ), rustc_attr!( rustc_coinductive, AttributeType::Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No, - "#![rustc_coinductive] changes a trait to be coinductive, allowing cycles in the trait solver." + "`#[rustc_coinductive]` changes a trait to be coinductive, allowing cycles in the trait solver." ), rustc_attr!( rustc_allow_incoherent_impl, AttributeType::Normal, template!(Word), ErrorFollowing, EncodeCrossCrate::No, - "#[rustc_allow_incoherent_impl] has to be added to all impl items of an incoherent inherent impl." + "`#[rustc_allow_incoherent_impl]` has to be added to all impl items of an incoherent inherent impl." ), rustc_attr!( rustc_preserve_ub_checks, AttributeType::CrateLevel, template!(Word), ErrorFollowing, EncodeCrossCrate::No, @@ -970,7 +1017,7 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ template!(Word), ErrorFollowing, EncodeCrossCrate::No, - "#[rustc_deny_explicit_impl] enforces that a trait can have no user-provided impls" + "`#[rustc_deny_explicit_impl]` enforces that a trait can have no user-provided impls" ), rustc_attr!( rustc_do_not_implement_via_object, @@ -978,14 +1025,14 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ template!(Word), ErrorFollowing, EncodeCrossCrate::No, - "#[rustc_do_not_implement_via_object] opts out of the automatic trait impl for trait objects \ + "`#[rustc_do_not_implement_via_object]` opts out of the automatic trait impl for trait objects \ (`impl Trait for dyn Trait`)" ), rustc_attr!( rustc_has_incoherent_inherent_impls, AttributeType::Normal, template!(Word), ErrorFollowing, EncodeCrossCrate::Yes, - "#[rustc_has_incoherent_inherent_impls] allows the addition of incoherent inherent impls for \ - the given type by annotating all impl items with #[rustc_allow_incoherent_impl]." + "`#[rustc_has_incoherent_inherent_impls]` allows the addition of incoherent inherent impls for \ + the given type by annotating all impl items with `#[rustc_allow_incoherent_impl]`." ), BuiltinAttribute { @@ -996,12 +1043,13 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ safety: AttributeSafety::Normal, template: template!(NameValueStr: "name"), duplicates: ErrorFollowing, - gate: Gated( - Stability::Unstable, - sym::rustc_attrs, - "diagnostic items compiler internal support for linting", - Features::rustc_attrs, - ), + gate: Gated{ + feature: sym::rustc_attrs, + message: "use of an internal attribute", + check: Features::rustc_attrs, + notes: &["the `#[rustc_diagnostic_item]` attribute allows the compiler to reference types \ + from the standard library for diagnostic purposes"], + }, }, gated!( // Used in resolve: @@ -1015,14 +1063,14 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ rustc_attr!( rustc_inherit_overflow_checks, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::No, "the `#[rustc_inherit_overflow_checks]` attribute is just used to control \ - overflow checking behavior of several libcore functions that are inlined \ - across crates and will never be stable", + overflow checking behavior of several functions in the standard library that are inlined \ + across crates", ), rustc_attr!( rustc_reservation_impl, Normal, template!(NameValueStr: "reservation message"), ErrorFollowing, EncodeCrossCrate::Yes, "the `#[rustc_reservation_impl]` attribute is internally used \ - for reserving for `for<T> From<!> for T` impl" + for reserving `impl<T> From<!> for T` as part of the effort to stabilize `!`" ), rustc_attr!( rustc_test_marker, Normal, template!(NameValueStr: "name"), WarnFollowing, @@ -1043,7 +1091,7 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ "the `#[rustc_main]` attribute is used internally to specify test entry point function", ), rustc_attr!( - rustc_skip_during_method_dispatch, Normal, template!(List: "array, boxed_slice"), WarnFollowing, + rustc_skip_during_method_dispatch, Normal, template!(List: "array, boxed_slice"), ErrorFollowing, EncodeCrossCrate::No, "the `#[rustc_skip_during_method_dispatch]` attribute is used to exclude a trait \ from method dispatch when the receiver is of the following type, for compatibility in \ @@ -1053,12 +1101,13 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ rustc_must_implement_one_of, Normal, template!(List: "function1, function2, ..."), ErrorFollowing, EncodeCrossCrate::No, "the `#[rustc_must_implement_one_of]` attribute is used to change minimal complete \ - definition of a trait, it's currently in experimental form and should be changed before \ - being exposed outside of the std" + definition of a trait. Its syntax and semantics are highly experimental and will be \ + subject to change before stabilization", ), rustc_attr!( rustc_doc_primitive, Normal, template!(NameValueStr: "primitive name"), ErrorFollowing, - EncodeCrossCrate::Yes, r#"`rustc_doc_primitive` is a rustc internal attribute"#, + EncodeCrossCrate::Yes, "the `#[rustc_doc_primitive]` attribute is used by the standard library \ + to provide a way to generate documentation for primitive types", ), gated!( rustc_intrinsic, Normal, template!(Word), ErrorFollowing, EncodeCrossCrate::Yes, intrinsics, @@ -1066,11 +1115,11 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ ), rustc_attr!( rustc_no_mir_inline, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::Yes, - "#[rustc_no_mir_inline] prevents the MIR inliner from inlining a function while not affecting codegen" + "`#[rustc_no_mir_inline]` prevents the MIR inliner from inlining a function while not affecting codegen" ), rustc_attr!( rustc_force_inline, Normal, template!(Word, NameValueStr: "reason"), WarnFollowing, EncodeCrossCrate::Yes, - "#[rustc_force_inline] forces a free function to be inlined" + "`#[rustc_force_inline]` forces a free function to be inlined" ), // ========================================================================== @@ -1091,6 +1140,10 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ WarnFollowing, EncodeCrossCrate::Yes ), rustc_attr!( + TEST, rustc_no_implicit_bounds, CrateLevel, template!(Word), + WarnFollowing, EncodeCrossCrate::No + ), + rustc_attr!( TEST, rustc_strict_coherence, Normal, template!(Word), WarnFollowing, EncodeCrossCrate::Yes ), @@ -1209,10 +1262,6 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[ ), ]; -pub fn deprecated_attributes() -> Vec<&'static BuiltinAttribute> { - BUILTIN_ATTRIBUTES.iter().filter(|attr| attr.gate.is_deprecated()).collect() -} - pub fn is_builtin_attr_name(name: Symbol) -> bool { BUILTIN_ATTRIBUTE_MAP.get(&name).is_some() } diff --git a/compiler/rustc_feature/src/lib.rs b/compiler/rustc_feature/src/lib.rs index 25764755a8f..dbc0daa3d83 100644 --- a/compiler/rustc_feature/src/lib.rs +++ b/compiler/rustc_feature/src/lib.rs @@ -40,14 +40,6 @@ pub struct Feature { issue: Option<NonZero<u32>>, } -#[derive(Copy, Clone, Debug)] -pub enum Stability { - Unstable, - // First argument is tracking issue link; second argument is an optional - // help message, which defaults to "remove this attribute". - Deprecated(&'static str, Option<&'static str>), -} - #[derive(Clone, Copy, Debug, Hash)] pub enum UnstableFeatures { /// Disallow use of unstable features, as on beta/stable channels. @@ -144,9 +136,8 @@ pub fn find_feature_issue(feature: Symbol, issue: GateIssue) -> Option<NonZero<u pub use accepted::ACCEPTED_LANG_FEATURES; pub use builtin_attrs::{ AttributeDuplicates, AttributeGate, AttributeSafety, AttributeTemplate, AttributeType, - BUILTIN_ATTRIBUTE_MAP, BUILTIN_ATTRIBUTES, BuiltinAttribute, GatedCfg, deprecated_attributes, - encode_cross_crate, find_gated_cfg, is_builtin_attr_name, is_stable_diagnostic_attribute, - is_valid_for_get_attr, + BUILTIN_ATTRIBUTE_MAP, BUILTIN_ATTRIBUTES, BuiltinAttribute, GatedCfg, encode_cross_crate, + find_gated_cfg, is_builtin_attr_name, is_stable_diagnostic_attribute, is_valid_for_get_attr, }; pub use removed::REMOVED_LANG_FEATURES; pub use unstable::{ diff --git a/compiler/rustc_feature/src/removed.rs b/compiler/rustc_feature/src/removed.rs index 013e1d5d0fa..a855e4c1b0e 100644 --- a/compiler/rustc_feature/src/removed.rs +++ b/compiler/rustc_feature/src/removed.rs @@ -1,5 +1,7 @@ //! List of the removed feature gates. +use std::num::{NonZero, NonZeroU32}; + use rustc_span::sym; use super::{Feature, to_nonzero}; @@ -7,11 +9,21 @@ use super::{Feature, to_nonzero}; pub struct RemovedFeature { pub feature: Feature, pub reason: Option<&'static str>, + pub pull: Option<NonZero<u32>>, +} + +macro_rules! opt_nonzero_u32 { + () => { + None + }; + ($val:expr) => { + Some(NonZeroU32::new($val).unwrap()) + }; } macro_rules! declare_features { ($( - $(#[doc = $doc:tt])* (removed, $feature:ident, $ver:expr, $issue:expr, $reason:expr), + $(#[doc = $doc:tt])* (removed, $feature:ident, $ver:expr, $issue:expr, $reason:expr $(, $pull:expr)?), )+) => { /// Formerly unstable features that have now been removed. pub static REMOVED_LANG_FEATURES: &[RemovedFeature] = &[ @@ -21,7 +33,8 @@ macro_rules! declare_features { since: $ver, issue: to_nonzero($issue), }, - reason: $reason + reason: $reason, + pull: opt_nonzero_u32!($($pull)?), }),+ ]; }; @@ -40,64 +53,65 @@ declare_features! ( // version they got originally added in.) /// Allows using the `amdgpu-kernel` ABI. - (removed, abi_amdgpu_kernel, "1.77.0", Some(51575), None), - (removed, advanced_slice_patterns, "1.0.0", Some(62254), - Some("merged into `#![feature(slice_patterns)]`")), + (removed, abi_amdgpu_kernel, "1.77.0", Some(51575), None, 120495), + (removed, abi_c_cmse_nonsecure_call, "CURRENT_RUSTC_VERSION", Some(81391), Some("renamed to abi_cmse_nonsecure_call"), 142146), + (removed, advanced_slice_patterns, "1.42.0", Some(62254), + Some("merged into `#![feature(slice_patterns)]`"), 67712), (removed, allocator, "1.0.0", None, None), /// Allows a test to fail without failing the whole suite. - (removed, allow_fail, "1.19.0", Some(46488), Some("removed due to no clear use cases")), + (removed, allow_fail, "1.60.0", Some(46488), Some("removed due to no clear use cases"), 93416), (removed, await_macro, "1.38.0", Some(50547), - Some("subsumed by `.await` syntax")), + Some("subsumed by `.await` syntax"), 62293), /// Allows using the `box $expr` syntax. - (removed, box_syntax, "1.70.0", Some(49733), Some("replaced with `#[rustc_box]`")), + (removed, box_syntax, "1.70.0", Some(49733), Some("replaced with `#[rustc_box]`"), 108471), /// Allows capturing disjoint fields in a closure/coroutine (RFC 2229). - (removed, capture_disjoint_fields, "1.49.0", Some(53488), Some("stabilized in Rust 2021")), + (removed, capture_disjoint_fields, "1.69.0", Some(53488), Some("stabilized in Rust 2021"), 108550), /// Allows comparing raw pointers during const eval. (removed, const_compare_raw_pointers, "1.46.0", Some(53020), - Some("cannot be allowed in const eval in any meaningful way")), + Some("cannot be allowed in const eval in any meaningful way"), 73398), /// Allows limiting the evaluation steps of const expressions - (removed, const_eval_limit, "1.43.0", Some(67217), Some("removed the limit entirely")), + (removed, const_eval_limit, "1.72.0", Some(67217), Some("removed the limit entirely"), 103877), /// Allows non-trivial generic constants which have to be manually propagated upwards. - (removed, const_evaluatable_checked, "1.48.0", Some(76560), Some("renamed to `generic_const_exprs`")), + (removed, const_evaluatable_checked, "1.56.0", Some(76560), Some("renamed to `generic_const_exprs`"), 88369), /// Allows the definition of `const` functions with some advanced features. (removed, const_fn, "1.54.0", Some(57563), - Some("split into finer-grained feature gates")), + Some("split into finer-grained feature gates"), 85109), /// Allows const generic types (e.g. `struct Foo<const N: usize>(...);`). - (removed, const_generics, "1.34.0", Some(44580), - Some("removed in favor of `#![feature(adt_const_params)]` and `#![feature(generic_const_exprs)]`")), + (removed, const_generics, "1.56.0", Some(44580), + Some("removed in favor of `#![feature(adt_const_params)]` and `#![feature(generic_const_exprs)]`"), 88369), /// Allows `[x; N]` where `x` is a constant (RFC 2203). - (removed, const_in_array_repeat_expressions, "1.37.0", Some(49147), - Some("removed due to causing promotable bugs")), + (removed, const_in_array_repeat_expressions, "1.51.0", Some(49147), + Some("removed due to causing promotable bugs"), 80404), /// Allows casting raw pointers to `usize` during const eval. (removed, const_raw_ptr_to_usize_cast, "1.55.0", Some(51910), - Some("at compile-time, pointers do not have an integer value, so these casts cannot be properly supported")), + Some("at compile-time, pointers do not have an integer value, so these casts cannot be properly supported"), 87020), /// Allows `T: ?const Trait` syntax in bounds. - (removed, const_trait_bound_opt_out, "1.42.0", Some(67794), - Some("Removed in favor of `~const` bound in #![feature(const_trait_impl)]")), + (removed, const_trait_bound_opt_out, "1.56.0", Some(67794), + Some("Removed in favor of `[const]` bound in #![feature(const_trait_impl)]"), 88328), /// Allows using `crate` as visibility modifier, synonymous with `pub(crate)`. - (removed, crate_visibility_modifier, "1.63.0", Some(53120), Some("removed in favor of `pub(crate)`")), + (removed, crate_visibility_modifier, "1.63.0", Some(53120), Some("removed in favor of `pub(crate)`"), 97254), /// Allows using custom attributes (RFC 572). (removed, custom_attribute, "1.0.0", Some(29642), - Some("removed in favor of `#![register_tool]` and `#![register_attr]`")), + Some("removed in favor of `#![register_tool]` and `#![register_attr]`"), 66070), /// Allows the use of `#[derive(Anything)]` as sugar for `#[derive_Anything]`. (removed, custom_derive, "1.32.0", Some(29644), Some("subsumed by `#[proc_macro_derive]`")), /// Allows default type parameters to influence type inference. (removed, default_type_parameter_fallback, "1.82.0", Some(27336), - Some("never properly implemented; requires significant design work")), + Some("never properly implemented; requires significant design work"), 127655), /// Allows deriving traits as per `SmartPointer` specification - (removed, derive_smart_pointer, "1.79.0", Some(123430), Some("replaced by `CoercePointee`")), + (removed, derive_smart_pointer, "1.84.0", Some(123430), Some("replaced by `CoercePointee`"), 131284), /// Allows using `#[doc(keyword = "...")]`. - (removed, doc_keyword, "1.28.0", Some(51315), - Some("merged into `#![feature(rustdoc_internals)]`")), + (removed, doc_keyword, "1.58.0", Some(51315), + Some("merged into `#![feature(rustdoc_internals)]`"), 90420), /// Allows using `doc(primitive)` without a future-incompat warning. - (removed, doc_primitive, "1.56.0", Some(88070), - Some("merged into `#![feature(rustdoc_internals)]`")), + (removed, doc_primitive, "1.58.0", Some(88070), + Some("merged into `#![feature(rustdoc_internals)]`"), 90420), /// Allows `#[doc(spotlight)]`. /// The attribute was renamed to `#[doc(notable_trait)]` /// and the feature to `doc_notable_trait`. - (removed, doc_spotlight, "1.22.0", Some(45040), - Some("renamed to `doc_notable_trait`")), + (removed, doc_spotlight, "1.53.0", Some(45040), + Some("renamed to `doc_notable_trait`"), 80965), /// Allows using `#[unsafe_destructor_blind_to_params]` (RFC 1238). (removed, dropck_parametricity, "1.38.0", Some(28498), None), /// Allows making `dyn Trait` well-formed even if `Trait` is not dyn compatible[^1]. @@ -107,161 +121,164 @@ declare_features! ( /// Renamed from `object_safe_for_dispatch`. /// /// [^1]: Formerly known as "object safe". - (removed, dyn_compatible_for_dispatch, "1.83.0", Some(43561), - Some("removed, not used heavily and represented additional complexity in dyn compatibility")), - /// Uses generic effect parameters for ~const bounds + (removed, dyn_compatible_for_dispatch, "1.87.0", Some(43561), + Some("removed, not used heavily and represented additional complexity in dyn compatibility"), 136522), + /// Uses generic effect parameters for [const] bounds (removed, effects, "1.84.0", Some(102090), - Some("removed, redundant with `#![feature(const_trait_impl)]`")), + Some("removed, redundant with `#![feature(const_trait_impl)]`"), 132479), /// Allows defining `existential type`s. (removed, existential_type, "1.38.0", Some(63063), Some("removed in favor of `#![feature(type_alias_impl_trait)]`")), /// Paths of the form: `extern::foo::bar` (removed, extern_in_paths, "1.33.0", Some(55600), - Some("subsumed by `::foo::bar` paths")), + Some("subsumed by `::foo::bar` paths"), 57572), /// Allows `#[doc(include = "some-file")]`. (removed, external_doc, "1.54.0", Some(44732), - Some("use #[doc = include_str!(\"filename\")] instead, which handles macro invocations")), + Some("use #[doc = include_str!(\"filename\")] instead, which handles macro invocations"), 85457), /// Allows using `#[ffi_returns_twice]` on foreign functions. (removed, ffi_returns_twice, "1.78.0", Some(58314), - Some("being investigated by the ffi-unwind project group")), + Some("being investigated by the ffi-unwind project group"), 120502), /// Allows generators to be cloned. - (removed, generator_clone, "1.65.0", Some(95360), Some("renamed to `coroutine_clone`")), + (removed, generator_clone, "1.75.0", Some(95360), Some("renamed to `coroutine_clone`"), 116958), /// Allows defining generators. - (removed, generators, "1.21.0", Some(43122), Some("renamed to `coroutines`")), + (removed, generators, "1.75.0", Some(43122), Some("renamed to `coroutines`"), 116958), /// An extension to the `generic_associated_types` feature, allowing incomplete features. (removed, generic_associated_types_extended, "1.85.0", Some(95451), Some( "feature needs overhaul and reimplementation pending \ better implied higher-ranked implied bounds support" - ) + ), + 133768 ), (removed, import_shadowing, "1.0.0", None, None), /// Allows in-band quantification of lifetime bindings (e.g., `fn foo(x: &'a u8) -> &'a u8`). - (removed, in_band_lifetimes, "1.23.0", Some(44524), - Some("removed due to unsolved ergonomic questions and added lifetime resolution complexity")), + (removed, in_band_lifetimes, "1.61.0", Some(44524), + Some("removed due to unsolved ergonomic questions and added lifetime resolution complexity"), 93845), /// Allows inferring `'static` outlives requirements (RFC 2093). (removed, infer_static_outlives_requirements, "1.63.0", Some(54185), - Some("removed as it caused some confusion and discussion was inactive for years")), + Some("removed as it caused some confusion and discussion was inactive for years"), 97875), /// Allow anonymous constants from an inline `const` block in pattern position (removed, inline_const_pat, "1.88.0", Some(76001), - Some("removed due to implementation concerns as it requires significant refactorings")), + Some("removed due to implementation concerns as it requires significant refactorings"), 138492), /// Lazily evaluate constants. This allows constants to depend on type parameters. - (removed, lazy_normalization_consts, "1.46.0", Some(72219), Some("superseded by `generic_const_exprs`")), + (removed, lazy_normalization_consts, "1.56.0", Some(72219), Some("superseded by `generic_const_exprs`"), 88369), /// Changes `impl Trait` to capture all lifetimes in scope. - (removed, lifetime_capture_rules_2024, "1.76.0", None, Some("unnecessary -- use edition 2024 instead")), + (removed, lifetime_capture_rules_2024, "1.87.0", None, Some("unnecessary -- use edition 2024 instead"), 136787), /// Allows using the `#[link_args]` attribute. (removed, link_args, "1.53.0", Some(29596), Some("removed in favor of using `-C link-arg=ARG` on command line, \ - which is available from cargo build scripts with `cargo:rustc-link-arg` now")), + which is available from cargo build scripts with `cargo:rustc-link-arg` now"), 83820), (removed, macro_reexport, "1.0.0", Some(29638), - Some("subsumed by `pub use`")), + Some("subsumed by `pub use`"), 49982), /// Allows using `#[main]` to replace the entrypoint `#[lang = "start"]` calls. - (removed, main, "1.53.0", Some(29634), None), + (removed, main, "1.53.0", Some(29634), None, 84217), (removed, managed_boxes, "1.0.0", None, None), /// Allows the use of type alias impl trait in function return positions (removed, min_type_alias_impl_trait, "1.56.0", Some(63063), - Some("removed in favor of full type_alias_impl_trait")), + Some("removed in favor of full type_alias_impl_trait"), 87564), /// Make `mut` not reset the binding mode on edition >= 2024. - (removed, mut_preserve_binding_mode_2024, "1.79.0", Some(123076), Some("superseded by `ref_pat_eat_one_layer_2024`")), + (removed, mut_preserve_binding_mode_2024, "1.80.0", Some(123076), Some("superseded by `ref_pat_eat_one_layer_2024`"), 125168), (removed, needs_allocator, "1.4.0", Some(27389), Some("subsumed by `#![feature(allocator_internals)]`")), /// Allows use of unary negate on unsigned integers, e.g., -e for e: u8 (removed, negate_unsigned, "1.0.0", Some(29645), None), /// Allows `#[no_coverage]` on functions. /// The feature was renamed to `coverage_attribute` and the attribute to `#[coverage(on|off)]` - (removed, no_coverage, "1.74.0", Some(84605), Some("renamed to `coverage_attribute`")), + (removed, no_coverage, "1.74.0", Some(84605), Some("renamed to `coverage_attribute`"), 114656), /// Allows `#[no_debug]`. - (removed, no_debug, "1.43.0", Some(29721), Some("removed due to lack of demand")), + (removed, no_debug, "1.43.0", Some(29721), Some("removed due to lack of demand"), 69667), /// Note: this feature was previously recorded in a separate /// `STABLE_REMOVED` list because it, uniquely, was once stable but was /// then removed. But there was no utility storing it separately, so now /// it's in this list. - (removed, no_stack_check, "1.0.0", None, None), + (removed, no_stack_check, "1.0.0", None, None, 40110), /// Allows making `dyn Trait` well-formed even if `Trait` is not dyn compatible (object safe). /// Renamed to `dyn_compatible_for_dispatch`. (removed, object_safe_for_dispatch, "1.83.0", Some(43561), - Some("renamed to `dyn_compatible_for_dispatch`")), + Some("renamed to `dyn_compatible_for_dispatch`"), 131511), /// Allows using `#[on_unimplemented(..)]` on traits. /// (Moved to `rustc_attrs`.) - (removed, on_unimplemented, "1.40.0", None, None), + (removed, on_unimplemented, "1.40.0", None, None, 65794), /// A way to temporarily opt out of opt-in copy. This will *never* be accepted. - (removed, opt_out_copy, "1.0.0", None, None), + (removed, opt_out_copy, "1.0.0", None, None, 20740), /// Allows features specific to OIBIT (now called auto traits). /// Renamed to `auto_traits`. - (removed, optin_builtin_traits, "1.0.0", Some(13231), - Some("renamed to `auto_traits`")), + (removed, optin_builtin_traits, "1.50.0", Some(13231), + Some("renamed to `auto_traits`"), 79336), /// Allows overlapping impls of marker traits. (removed, overlapping_marker_traits, "1.42.0", Some(29864), - Some("removed in favor of `#![feature(marker_trait_attr)]`")), + Some("removed in favor of `#![feature(marker_trait_attr)]`"), 68544), (removed, panic_implementation, "1.28.0", Some(44489), - Some("subsumed by `#[panic_handler]`")), + Some("subsumed by `#[panic_handler]`"), 53619), /// Allows `extern "platform-intrinsic" { ... }`. - (removed, platform_intrinsics, "1.4.0", Some(27731), - Some("SIMD intrinsics use the regular intrinsics ABI now")), + (removed, platform_intrinsics, "1.78.0", Some(27731), + Some("SIMD intrinsics use the regular intrinsics ABI now"), 121516), /// Allows using `#![plugin(myplugin)]`. (removed, plugin, "1.75.0", Some(29597), - Some("plugins are no longer supported")), + Some("plugins are no longer supported"), 116412), /// Allows using `#[plugin_registrar]` on functions. - (removed, plugin_registrar, "1.54.0", Some(29597), - Some("plugins are no longer supported")), + (removed, plugin_registrar, "1.75.0", Some(29597), + Some("plugins are no longer supported"), 116412), /// Allows exhaustive integer pattern matching with `usize::MAX`/`isize::MIN`/`isize::MAX`. - (removed, precise_pointer_size_matching, "1.32.0", Some(56354), - Some("removed in favor of half-open ranges")), + (removed, precise_pointer_size_matching, "1.76.0", Some(56354), + Some("removed in favor of half-open ranges"), 118598), (removed, pref_align_of, "CURRENT_RUSTC_VERSION", Some(91971), Some("removed due to marginal use and inducing compiler complications")), (removed, proc_macro_expr, "1.27.0", Some(54727), - Some("subsumed by `#![feature(proc_macro_hygiene)]`")), + Some("subsumed by `#![feature(proc_macro_hygiene)]`"), 52121), (removed, proc_macro_gen, "1.27.0", Some(54727), - Some("subsumed by `#![feature(proc_macro_hygiene)]`")), + Some("subsumed by `#![feature(proc_macro_hygiene)]`"), 52121), (removed, proc_macro_mod, "1.27.0", Some(54727), - Some("subsumed by `#![feature(proc_macro_hygiene)]`")), + Some("subsumed by `#![feature(proc_macro_hygiene)]`"), 52121), (removed, proc_macro_non_items, "1.27.0", Some(54727), - Some("subsumed by `#![feature(proc_macro_hygiene)]`")), + Some("subsumed by `#![feature(proc_macro_hygiene)]`"), 52121), (removed, pub_macro_rules, "1.53.0", Some(78855), Some("removed due to being incomplete, in particular it does not work across crates")), (removed, pushpop_unsafe, "1.2.0", None, None), (removed, quad_precision_float, "1.0.0", None, None), (removed, quote, "1.33.0", Some(29601), None), - (removed, ref_pat_everywhere, "1.79.0", Some(123076), Some("superseded by `ref_pat_eat_one_layer_2024")), + (removed, ref_pat_everywhere, "1.80.0", Some(123076), Some("superseded by `ref_pat_eat_one_layer_2024"), 125168), (removed, reflect, "1.0.0", Some(27749), None), /// Allows using the `#[register_attr]` attribute. (removed, register_attr, "1.65.0", Some(66080), - Some("removed in favor of `#![register_tool]`")), + Some("removed in favor of `#![register_tool]`"), 66070), (removed, rust_2018_preview, "1.76.0", None, Some("2018 Edition preview is no longer relevant")), /// Allows using the macros: /// + `__diagnostic_used` /// + `__register_diagnostic` /// +`__build_diagnostic_array` - (removed, rustc_diagnostic_macros, "1.38.0", None, None), + (removed, rustc_diagnostic_macros, "1.38.0", None, None, 64139), /// Allows identifying crates that contain sanitizer runtimes. - (removed, sanitizer_runtime, "1.17.0", None, None), + (removed, sanitizer_runtime, "1.17.0", None, None, 65241), (removed, simd, "1.0.0", Some(27731), Some("removed in favor of `#[repr(simd)]`")), /// Allows using `#[start]` on a function indicating that it is the program entrypoint. - (removed, start, "1.0.0", Some(29633), Some("not portable enough and never RFC'd")), + (removed, start, "1.86.0", Some(29633), Some("not portable enough and never RFC'd"), 134299), /// Allows `#[link(kind = "static-nobundle", ...)]`. - (removed, static_nobundle, "1.16.0", Some(37403), - Some(r#"subsumed by `#[link(kind = "static", modifiers = "-bundle", ...)]`"#)), + (removed, static_nobundle, "1.63.0", Some(37403), + Some(r#"subsumed by `#[link(kind = "static", modifiers = "-bundle", ...)]`"#), 95818), (removed, struct_inherit, "1.0.0", None, None), (removed, test_removed_feature, "1.0.0", None, None), /// Allows using items which are missing stability attributes (removed, unmarked_api, "1.0.0", None, None), /// Allows unnamed fields of struct and union type - (removed, unnamed_fields, "1.83.0", Some(49804), Some("feature needs redesign")), + (removed, unnamed_fields, "1.83.0", Some(49804), Some("feature needs redesign"), 131045), (removed, unsafe_no_drop_flag, "1.0.0", None, None), + /// Allows unsized rvalues at arguments and parameters. + (removed, unsized_locals, "CURRENT_RUSTC_VERSION", Some(48055), Some("removed due to implementation concerns; see https://github.com/rust-lang/rust/issues/111942")), (removed, unsized_tuple_coercion, "1.87.0", Some(42877), - Some("The feature restricts possible layouts for tuples, and this restriction is not worth it.")), + Some("The feature restricts possible layouts for tuples, and this restriction is not worth it."), 137728), /// Allows `union` fields that don't implement `Copy` as long as they don't have any drop glue. - (removed, untagged_unions, "1.13.0", Some(55149), - Some("unions with `Copy` and `ManuallyDrop` fields are stable; there is no intent to stabilize more")), + (removed, untagged_unions, "1.64.0", Some(55149), + Some("unions with `Copy` and `ManuallyDrop` fields are stable; there is no intent to stabilize more"), 97995), /// Allows `#[unwind(..)]`. /// /// Permits specifying whether a function should permit unwinding or abort on unwind. - (removed, unwind_attributes, "1.56.0", Some(58760), Some("use the C-unwind ABI instead")), + (removed, unwind_attributes, "1.56.0", Some(58760), Some("use the C-unwind ABI instead"), 86155), (removed, visible_private_types, "1.0.0", None, None), /// Allows `extern "wasm" fn` (removed, wasm_abi, "1.81.0", Some(83788), - Some("non-standard wasm ABI is no longer supported")), + Some("non-standard wasm ABI is no longer supported"), 127605), // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! // Features are listed in alphabetical order. Tidy will fail if you don't keep it this way. // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! @@ -269,4 +286,18 @@ declare_features! ( // ------------------------------------------------------------------------- // feature-group-end: removed features // ------------------------------------------------------------------------- + + + // ------------------------------------------------------------------------- + // feature-group-start: removed library features + // ------------------------------------------------------------------------- + // + // FIXME(#141617): we should have a better way to track removed library features, but we reuse + // the infrastructure here so users still get hints. The symbols used here can be remove from + // `symbol.rs` when that happens. + (removed, concat_idents, "CURRENT_RUSTC_VERSION", Some(29599), + Some("use the `${concat(..)}` metavariable expression instead"), 142704), + // ------------------------------------------------------------------------- + // feature-group-end: removed library features + // ------------------------------------------------------------------------- ); diff --git a/compiler/rustc_feature/src/unstable.rs b/compiler/rustc_feature/src/unstable.rs index 9447deeecbb..719ba597da1 100644 --- a/compiler/rustc_feature/src/unstable.rs +++ b/compiler/rustc_feature/src/unstable.rs @@ -237,6 +237,8 @@ declare_features! ( (internal, profiler_runtime, "1.18.0", None), /// Allows using `rustc_*` attributes (RFC 572). (internal, rustc_attrs, "1.0.0", None), + /// Introduces a hierarchy of `Sized` traits (RFC 3729). + (unstable, sized_hierarchy, "CURRENT_RUSTC_VERSION", None), /// Allows using the `#[stable]` and `#[unstable]` attributes. (internal, staged_api, "1.0.0", None), /// Added for testing unstable lints; perma-unstable. @@ -351,8 +353,10 @@ declare_features! ( /// Allows `extern "avr-interrupt" fn()` and `extern "avr-non-blocking-interrupt" fn()`. (unstable, abi_avr_interrupt, "1.45.0", Some(69664)), - /// Allows `extern "C-cmse-nonsecure-call" fn()`. - (unstable, abi_c_cmse_nonsecure_call, "1.51.0", Some(81391)), + /// Allows `extern "cmse-nonsecure-call" fn()`. + (unstable, abi_cmse_nonsecure_call, "CURRENT_RUSTC_VERSION", Some(81391)), + /// Allows `extern "custom" fn()`. + (unstable, abi_custom, "CURRENT_RUSTC_VERSION", Some(140829)), /// Allows `extern "gpu-kernel" fn()`. (unstable, abi_gpu_kernel, "1.86.0", Some(135467)), /// Allows `extern "msp430-interrupt" fn()`. @@ -427,13 +431,13 @@ declare_features! ( (unstable, closure_lifetime_binder, "1.64.0", Some(97362)), /// Allows `#[track_caller]` on closures and coroutines. (unstable, closure_track_caller, "1.57.0", Some(87417)), - /// Allows `extern "C-cmse-nonsecure-entry" fn()`. + /// Allows `extern "cmse-nonsecure-entry" fn()`. (unstable, cmse_nonsecure_entry, "1.48.0", Some(75835)), /// Allows `async {}` expressions in const contexts. (unstable, const_async_blocks, "1.53.0", Some(85368)), /// Allows `const || {}` closures in const contexts. (incomplete, const_closures, "1.68.0", Some(106003)), - /// Allows using `~const Destruct` bounds and calling drop impls in const contexts. + /// Allows using `[const] Destruct` bounds and calling drop impls in const contexts. (unstable, const_destruct, "1.85.0", Some(133214)), /// Allows `for _ in _` loops in const contexts. (unstable, const_for, "1.56.0", Some(87575)), @@ -506,7 +510,7 @@ declare_features! ( (unstable, ffi_pure, "1.45.0", Some(58329)), /// Controlling the behavior of fmt::Debug (unstable, fmt_debug, "1.82.0", Some(129709)), - /// Allows using `#[repr(align(...))]` on function items + /// Allows using `#[align(...)]` on function items (unstable, fn_align, "1.53.0", Some(82232)), /// Support delegating implementation of functions to other already implemented functions. (incomplete, fn_delegation, "1.76.0", Some(118212)), @@ -516,8 +520,6 @@ declare_features! ( (unstable, frontmatter, "1.88.0", Some(136889)), /// Allows defining gen blocks and `gen fn`. (unstable, gen_blocks, "1.75.0", Some(117078)), - /// Infer generic args for both consts and types. - (unstable, generic_arg_infer, "1.55.0", Some(85077)), /// Allows non-trivial generic constants which have to have wfness manually propagated to callers (incomplete, generic_const_exprs, "1.56.0", Some(76560)), /// Allows generic parameters and where-clauses on free & associated const items. @@ -546,8 +548,6 @@ declare_features! ( (incomplete, inherent_associated_types, "1.52.0", Some(8995)), /// Allows using `pointer` and `reference` in intra-doc links (unstable, intra_doc_pointers, "1.51.0", Some(80896)), - // Allows using the `kl` and `widekl` target features and the associated intrinsics - (unstable, keylocker_x86, "1.86.0", Some(134813)), // Allows setting the threshold for the `large_assignments` lint. (unstable, large_assignments, "1.52.0", Some(83518)), /// Allow to have type alias types for inter-crate use. @@ -557,6 +557,8 @@ declare_features! ( /// Allows using `#[link(kind = "link-arg", name = "...")]` /// to pass custom arguments to the linker. (unstable, link_arg_attribute, "1.76.0", Some(99427)), + /// Allows fused `loop`/`match` for direct intraprocedural jumps. + (incomplete, loop_match, "CURRENT_RUSTC_VERSION", Some(132306)), /// Give access to additional metadata about declarative macro meta-variables. (unstable, macro_metavar_expr, "1.61.0", Some(83527)), /// Provides a way to concatenate identifiers using metavariable expressions. @@ -667,8 +669,6 @@ declare_features! ( (incomplete, unsized_const_params, "1.82.0", Some(95174)), /// Allows unsized fn parameters. (internal, unsized_fn_params, "1.49.0", Some(48055)), - /// Allows unsized rvalues at arguments and parameters. - (incomplete, unsized_locals, "1.30.0", Some(48055)), /// Allows using the `#[used(linker)]` (or `#[used(compiler)]`) attribute. (unstable, used_with_arg, "1.60.0", Some(93798)), /// Allows use of attributes in `where` clauses. |