Function rustc_expand::mbe::diagnostics::failed_to_match_macro

source ยท 
pub(super) fn failed_to_match_macro(
    psess: &ParseSess,
    sp: Span,
    def_span: Span,
    name: Ident,
    arg: TokenStream,
    lhses: &[Vec<MatcherLoc>],
) -> (Span, ErrorGuaranteed)