Function rustc_expand::mbe::macro_rules::emit_frag_parse_err

fn emit_frag_parse_err(
    e: DiagnosticBuilder<'_, ErrorGuaranteed>,
    parser: &Parser<'_>,
    orig_parser: &mut Parser<'_>,
    site_span: Span,
    arm_span: Span,
    kind: AstFragmentKind
)