Module blog::daily_rfcs::attributes::_0003_attribute_usage

libsyntax/ast.rs

pub struct Attribute {
    pub id: AttrId,
    pub style: AttrStyle,
    pub path: Path,
    pub tokens: TokenStream,
    pub is_sugared_doc: bool,
    pub span: Span,
}

Note

• syntax::ast::parse::ParseSess use AttrId to generate a side table of used attributes ONLY during parsing and expanding.
• The attribute-usage lint would run at the end of compilation and warn on all attributes whose ID does not appear in the side table.

RFC: 0003-attribute-usage