Auto merge of #146494 - jdonszelmann:rollup-0bbwwwf, r=jdonszelmann

Rollup of 5 pull requests

Successful merges:

 - rust-lang/rust#146389 (Convert `no_std` and `no_core` to the new attribute infrastructure)
 - rust-lang/rust#146403 (sort array trait implementation suggestions correctly)
 - rust-lang/rust#146452 (Improve `alloc::Layout` coverage)
 - rust-lang/rust#146477 (Improve `core::char` coverage)
 - rust-lang/rust#146481 (Improve `core::hash` coverage)

r? `@ghost`
`@rustbot` modify labels: rollup

2 files changed, 28 insertions, 2 deletions

diff --git a/compiler/rustc_attr_parsing/src/attributes/crate_level.rs b/compiler/rustc_attr_parsing/src/attributes/crate_level.rs
index d23a7ae72f8..0b2c05482bf 100644
--- a/compiler/rustc_attr_parsing/src/attributes/crate_level.rs
+++ b/compiler/rustc_attr_parsing/src/attributes/crate_level.rs
@@ -176,3 +176,27 @@ impl<S: Stage> SingleAttributeParser<S> for PatternComplexityLimitParser {
         })
     }
 }
+
+pub(crate) struct NoCoreParser;
+
+impl<S: Stage> NoArgsAttributeParser<S> for NoCoreParser {
+    const PATH: &[Symbol] = &[sym::no_core];
+    const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::Warn;
+    // because it's a crate-level attribute, we already warn about it.
+    // Putting target limitations here would give duplicate warnings
+    const ALLOWED_TARGETS: AllowedTargets = AllowedTargets::AllowList(ALL_TARGETS);
+    const CREATE: fn(Span) -> AttributeKind = AttributeKind::NoCore;
+    const TYPE: AttributeType = AttributeType::CrateLevel;
+}
+
+pub(crate) struct NoStdParser;
+
+impl<S: Stage> NoArgsAttributeParser<S> for NoStdParser {
+    const PATH: &[Symbol] = &[sym::no_std];
+    const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::Warn;
+    // because it's a crate-level attribute, we already warn about it.
+    // Putting target limitations here would give duplicate warnings
+    const ALLOWED_TARGETS: AllowedTargets = AllowedTargets::AllowList(ALL_TARGETS);
+    const CREATE: fn(Span) -> AttributeKind = AttributeKind::NoStd;
+    const TYPE: AttributeType = AttributeType::CrateLevel;
+}
diff --git a/compiler/rustc_attr_parsing/src/context.rs b/compiler/rustc_attr_parsing/src/context.rs
index d2b35090135..b3ab1d3edd6 100644
--- a/compiler/rustc_attr_parsing/src/context.rs
+++ b/compiler/rustc_attr_parsing/src/context.rs
@@ -25,8 +25,8 @@ use crate::attributes::codegen_attrs::{
 };
 use crate::attributes::confusables::ConfusablesParser;
 use crate::attributes::crate_level::{
-    CrateNameParser, MoveSizeLimitParser, PatternComplexityLimitParser, RecursionLimitParser,
-    TypeLengthLimitParser,
+    CrateNameParser, MoveSizeLimitParser, NoCoreParser, NoStdParser, PatternComplexityLimitParser,
+    RecursionLimitParser, TypeLengthLimitParser,
 };
 use crate::attributes::deprecation::DeprecationParser;
 use crate::attributes::dummy::DummyParser;
@@ -223,8 +223,10 @@ attribute_parsers!(
         Single<WithoutArgs<MacroEscapeParser>>,
         Single<WithoutArgs<MarkerParser>>,
         Single<WithoutArgs<MayDangleParser>>,
+        Single<WithoutArgs<NoCoreParser>>,
         Single<WithoutArgs<NoImplicitPreludeParser>>,
         Single<WithoutArgs<NoMangleParser>>,
+        Single<WithoutArgs<NoStdParser>>,
         Single<WithoutArgs<NonExhaustiveParser>>,
         Single<WithoutArgs<ParenSugarParser>>,
         Single<WithoutArgs<PassByValueParser>>,