def CheckedAdd.value

bend-collections-laws-math@1.0.0.0 · spec/math/fixed.bend:86

import Base

86def CheckedAdd.value(~T: Data, ~val: T -> Nat, ~f: @+x: T -> @+y: T -> Maybe<&2, T>, +w: Nat, +a: T, +b: T) -> Type:
87  {mval(~T, ~val, f(a, b)) == cnat(w, Nat.add(val(a), val(b))) : Maybe<&2, Nat>}