Crate rustc_macros

Macros§

extension: Derive an extension trait for a given impl block. The trait name goes into the parenthesized args of the macro, for greppability. For example:

BlobDecodable: See docs on derive Decodable.
Decodable: Derives Decodable<D> for T where D: SpanDecoder
Decodable_NoContext: See docs on derive Decodable.
Diagnostic
Encodable
Encodable_NoContext
HashStable
HashStable_Generic
HashStable_NoContext: HashStable implementation that has no HashStableContext bound and which adds where bounds for HashStable based off of fields and not generics. This is suitable for use in crates like rustc_type_ir.
LazyDecodable: See docs on derive Decodable.
Lift
LintDiagnostic
MetadataEncodable: Most encodable derives mirror a decodable derive. MetadataEncodable is roughly mirrored by the combination of LazyDecodable and BlobDecodable
PrintAttribute: Derives PrintAttribute for AttributeKind. This macro is pretty specific to rustc_hir::attrs and likely not that useful in other places. It’s deriving something close to Debug without printing some extraneous things like spans.
Subdiagnostic
TyDecodable: See docs on derive Decodable.
TyEncodable
TypeFoldable: Derives TypeFoldable for the annotated struct or enum (union is not supported).
TypeVisitable: Derives TypeVisitable for the annotated struct or enum (union is not supported).
Walkable: Derives Walkable for the annotated struct or enum (union is not supported).