def ws.topc

bend-osdev-word64@0.1.1.0 · proof_shift.bend:225

import Base

225# the bit Word.shl.put(n, c, w) shifts out at the top, and Word.shl's
226def ws.topc(n: Nat, c: Bool, w: Word(n)) -> Bool:
227  match n:
228    case 0n:
229      c
230    case 1n+ +p:
231      match w:
232        case WCon{b, t}:
233          ws.topc(p, b, t)