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Rollup merge of #152728 - Ozzy1423:default-lib, r=JonathanBrouwer

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Port #![default_lib_allocator] to the new attribute parser

Tracking issue: https://github.com/rust-lang/rust/issues/131229

r? @JonathanBrouwer
This commit is contained in:
Stuart Cook 2026-02-17 13:02:25 +11:00 • committed by GitHub
commit f7699054f7
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GPG key ID: B5690EEEBB952194
6 changed files with 16 additions and 5 deletions
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9
compiler/rustc_attr_parsing/src/attributes/crate_level.rs
View file

@ -292,3 +292,12 @@ impl<S: Stage> NoArgsAttributeParser<S> for RustcNoImplicitBoundsParser {
const ALLOWED_TARGETS: AllowedTargets = AllowedTargets::AllowList(&[Allow(Target::Crate)]);
const CREATE: fn(Span) -> AttributeKind = |_| AttributeKind::RustcNoImplicitBounds;
}
pub(crate) struct DefaultLibAllocatorParser;
impl<S: Stage> NoArgsAttributeParser<S> for DefaultLibAllocatorParser {
const PATH: &[Symbol] = &[sym::default_lib_allocator];
const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::Warn;
const ALLOWED_TARGETS: AllowedTargets = AllowedTargets::AllowList(&[Allow(Target::Crate)]);
const CREATE: fn(Span) -> AttributeKind = |_| AttributeKind::DefaultLibAllocator;
}

1
compiler/rustc_attr_parsing/src/context.rs
View file

@ -235,6 +235,7 @@ attribute_parsers!(
Single<WithoutArgs<ConstContinueParser>>,
Single<WithoutArgs<ConstStabilityIndirectParser>>,
Single<WithoutArgs<CoroutineParser>>,
Single<WithoutArgs<DefaultLibAllocatorParser>>,
Single<WithoutArgs<DenyExplicitImplParser>>,
Single<WithoutArgs<DynIncompatibleTraitParser>>,
Single<WithoutArgs<EiiForeignItemParser>>,

3
compiler/rustc_hir/src/attrs/data_structures.rs
View file

@ -897,6 +897,9 @@ pub enum AttributeKind {
/// Represents `#[debugger_visualizer]`.
DebuggerVisualizer(ThinVec<DebugVisualizer>),
/// Represents `#![default_lib_allocator]`
DefaultLibAllocator,
/// Represents [`#[deprecated]`](https://doc.rust-lang.org/stable/reference/attributes/diagnostics.html#the-deprecated-attribute).
Deprecation { deprecation: Deprecation, span: Span },

1
compiler/rustc_hir/src/attrs/encode_cross_crate.rs
View file

@ -35,6 +35,7 @@ impl AttributeKind {
CrateType(_) => No,
CustomMir(_, _, _) => Yes,
DebuggerVisualizer(..) => No,
DefaultLibAllocator => No,
Deprecation { .. } => Yes,
DoNotRecommend { .. } => Yes,
Doc(_) => Yes,

5
compiler/rustc_metadata/src/rmeta/encoder.rs
View file

@ -734,10 +734,7 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
has_global_allocator: tcx.has_global_allocator(LOCAL_CRATE),
has_alloc_error_handler: tcx.has_alloc_error_handler(LOCAL_CRATE),
has_panic_handler: tcx.has_panic_handler(LOCAL_CRATE),
has_default_lib_allocator: ast::attr::contains_name(
attrs,
sym::default_lib_allocator,
),
has_default_lib_allocator: find_attr!(attrs, AttributeKind::DefaultLibAllocator),
externally_implementable_items,
proc_macro_data,
debugger_visualizers,

2
compiler/rustc_passes/src/check_attr.rs
View file

@ -246,6 +246,7 @@ impl<'tcx> CheckAttrVisitor<'tcx> {
| AttributeKind::CrateName { .. }
| AttributeKind::CrateType(..)
| AttributeKind::DebuggerVisualizer(..)
| AttributeKind::DefaultLibAllocator
// `#[doc]` is actually a lot more than just doc comments, so is checked below
| AttributeKind::DocComment {..}
| AttributeKind::EiiDeclaration { .. }
@ -399,7 +400,6 @@ impl<'tcx> CheckAttrVisitor<'tcx> {
| sym::deny
| sym::forbid
// internal
| sym::default_lib_allocator
| sym::rustc_inherit_overflow_checks
| sym::rustc_on_unimplemented
| sym::rustc_doc_primitive