def d32_val

bend-collections-laws-math@1.0.0.0 · proofs/math/typed/fixbytes.bend:105

import Base
import bend-collections-laws-math@1.0.0.0/spec/lib/common.bend as C
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/fixed.bend as F

105def d32_val(+k: Nat, +hk: {Nat.is_le(Nat.add(8n, k), 32n) == True{} : Bool}, r: Maybe<&2, U32>, +hr: {bnd(k, SF.mval(~U32, ~SG.u32_val, r)) == True{} : Bool}, +b: U32) -> {SF.mval(~U32, ~SG.u32_val, F.dig32(r, F.is_byte(b), b)) == SF.digit_on(SF.mval(~U32, ~SG.u32_val, r), C.fits(8n, v(b)), v(b)) : Maybe<&2, Nat>}:
106  match r:
107    case Some{+z}:
108      d32_some(k, hk, z, hr, b, F.is_byte(b), {==})
109    case None{}:
110      {==}