Function rustc_expand::mbe::macro_parser::parse_tt

pub(in mbe) fn parse_tt(
    parser: &mut Cow<'_, Parser<'_>>, 
    ms: &[TokenTree]
) -> ParseResult<FxHashMap<MacroRulesNormalizedIdent, NamedMatch>>

Use the given sequence of token trees (ms) as a matcher. Match the token stream from the given parser against it and return the match.