def d64_bnd

bend-collections-laws-math@1.0.0.0 · proofs/math/typed/fixbytes.bend:316

import Base
import bend-collections-laws-math@1.0.0.0/spec/math/generic.bend as SG
import bend-collections-laws-math@1.0.0.0/spec/math/fixed.bend as SF
import bend-collections-laws-math@1.0.0.0/src/math/u64.bend as WU
import bend-collections-laws-math@1.0.0.0/src/math/fixed.bend as F

316def d64_bnd(+k: Nat, +hk: {Nat.is_le(Nat.add(8n, k), 64n) == True{} : Bool}, r: Maybe<&2, WU.U64>, +hr: {bnd(k, SF.mval(~WU.U64, ~SG.u64_val, r)) == True{} : Bool}, +b: U32) -> {bnd(Nat.add(8n, k), SF.mval(~WU.U64, ~SG.u64_val, F.dig64(r, F.is_byte(b), b))) == True{} : Bool}:
317  match r:
318    case Some{+z}:
319      d64_sbnd(k, hk, z, hr, b, F.is_byte(b), {==})
320    case None{}:
321      {==}