ProofShift.ws.topc: def of bend-osdev-word64@0.1.1.1
Import: import bend-osdev-word64@0.1.1.1/proof_shift.bend as ProofShift
Lines 225-233 of bend-osdev-word64@0.1.1.1/proof_shift.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-word64@0.1.1.1/proof_shift.bend&start_line=225&end_line=233

import Base

# the bit Word.shl.put(n, c, w) shifts out at the top, and Word.shl's
def ws.topc(n: Nat, c: Bool, w: Word(n)) -> Bool:
  match n:
    case 0n:
      c
    case 1n+ +p:
      match w:
        case WCon{b, t}:
          ws.topc(p, b, t)

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