The alchemy grammar plugin and language for the tabnas parsing engine (declarative streaming transducers and renderers), and the types tabnas transducers and renderers share.
//! The matcher's capture identifier: the one part of transduce's
//! shared-prefix matcher that crosses into the types every stage shares.
/// Which selector matched: its position in the slice given to
/// transduce's `Matcher::new`.
pubtypeCaptureId=usize;