def saturating_sub
bend-collections-laws-math@1.0.0.0 · proofs/math/typed/fix64.bend:128
import bend-collections-laws-math@1.0.0.0/proofs/math/typed/fix64.bend as Fix64
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/w64.bend as X
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
import bend-collections-laws-math@1.0.0.0/proofs/math/typed/w64add.bend as WA
128def saturating_sub(+a: WU.U64, +b: WU.U64) -> SF.SaturatingSub.value(~WU.U64, ~SG.u64_val, ~F.u64_saturating_sub, a, b):
129 ssub(a, b, X.lt(a, b), Equal.sym(Bool, X.lt(a, b), Nat.is_lt(SG.u64_val(a), SG.u64_val(b)), WA.lt_value(a, b)))