Function syntax::ext::tt::transcribe::transcribe

pub fn transcribe(sp_diag: &Handler,
                  interp: Option<HashMap<Ident, Rc<NamedMatch>>>,
                  src: Vec<TokenTree>)
                  -> TokenStream

🔬 This is a nightly-only experimental API. (rustc_private)

This can do Macro-By-Example transcription. On the other hand, if src contains no TokenTree::{Sequence, Match}s, or SubstNts, interp can (and should) be None.