Function syntax::ext::tt::transcribe::new_tt_readerExperimental
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pub fn new_tt_reader<'a>(sp_diag: &'a SpanHandler, interp: Option<HashMap<Ident, Rc<NamedMatch>>>, src: Vec<TokenTree>) -> TtReader<'a>
This can do Macro-By-Example transcription. On the other hand, if
src
contains no TtSequence
s and TtNonterminal
s, interp
can (and
should) be none.