Crate rustc_macros

Macros

• current_rustc_version
• rustc_queries
• symbols

Attribute 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:

Derive Macros

• Decodable
• Decodable_Generic
• Diagnostic
• Encodable
• Encodable_Generic
• 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.
• Lift
• LintDiagnostic
• MetadataDecodable
• MetadataEncodable
• Subdiagnostic
• TryFromU32
  Derives TryFrom<u32> for the annotated enum, which must have no fields. Each variant maps to the value it would produce under an as u32 cast.
• TyDecodable
• 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).