Function rustc_expand::mbe::macro_rules::suggest_slice_pat

pub(in mbe::macro_rules) fn suggest_slice_pat(
    e: &mut DiagnosticBuilder<'_>, 
    site_span: Span, 
    parser: &Parser<'_>
)

Instead of e.g. vec![a, b, c] in a pattern context, suggest [a, b, c].