Cli.width_go: def of cli@0.2.0.0
Import: import cli@0.2.0.0/cli.bend as Cli
Lines 992-998 of cli@0.2.0.0/cli.bend: https://jend.leeeet.dev/read.txt?path=cli@0.2.0.0/cli.bend&start_line=992&end_line=998

import Base

# acc, plus the width of step, the last code point's, and of s after it.
def width_go(s: String, step: WidthStep, acc: Nat) -> Nat:
  match s step:
    case SNil{} WidthStep{w, run}: Nat.add(w, acc)
    case SCon{head, tail} WidthStep{w, run}:
      +code = Char.to_u32(head)
      width_go(tail, code_step(code_class(code), run, code), Nat.add(w, acc))

Uses (7):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Char.to_u32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=cli@0.2.0.0/cli.bend&name=WidthStep
  https://jend.leeeet.dev/definition.txt?path=cli@0.2.0.0/cli.bend&name=code_class
  https://jend.leeeet.dev/definition.txt?path=cli@0.2.0.0/cli.bend&name=code_step