ProofWord.wbit: def of lawful-words@0.1.0.0
Import: import lawful-words@0.1.0.0/proof_word.bend as ProofWord
Lines 777-789 of lawful-words@0.1.0.0/proof_word.bend: https://jend.leeeet.dev/read.txt?path=lawful-words@0.1.0.0/proof_word.bend&start_line=777&end_line=789

import Base

# Bit k of a word (False from n up).
def wbit(n: Nat, w: Word(n), k: Nat) -> Bool:
  match n:
    case 0n:
      False{}
    case 1n+p:
      match w:
        case WCon{b, t}:
          match k:
            case 0n:
              b
            case 1n+j:
              wbit(p, t, j)

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Word
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Word.Con