Nar.clean: def of ezx@1.11.0.0
Import: import ezx@1.11.0.0/src/sha/nar.bend as Nar
Lines 252-259 of ezx@1.11.0.0/src/sha/nar.bend: https://jend.leeeet.dev/read.txt?path=ezx@1.11.0.0/src/sha/nar.bend&start_line=252&end_line=259

import Base

# whether a text holds no NUL, as no name and no link target can
def clean(text: String) -> Bool:
  match text:
    case SNil{}:
      True{}
    case SCon{c, t}:
      +rest = clean(t)
      Bool.and(Bool.not(Char.is_eq(c, nul())), rest)

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.not
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Char.is_eq
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=ezx@1.11.0.0/src/sha/nar.bend&name=nul