def parse.once

shake@0.7.0.0 · src/cli.bend:691

import Base

691# a flag or single-valued option given again is refused, whatever the walk
692# would have done with it; the walker keeps the rest of its state
693def parse.once(again: Bool, st: St, +name: String, +path: List<&2, String>) -> St:
694  match again:
695    case True{}:
696      St{_m, +args, +up, +subs, _p, +binds, +pos, +raw, +seen} = st
697      St{Dead{Repeated{path, name}}, args, up, subs, path, binds, pos, raw, seen}
698    case False{}:
699      st