def Prod.checked

bend-collections-laws-math@1.0.0.0 · spec/math/generic.bend:208

import Base
import bend-collections-laws-math@1.0.0.0/src/math/num.bend as N
import bend-collections-laws-math@1.0.0.0/src/math/generic.bend as G

208def Prod.checked(~T: Data, ~op: N.Op<T> -> T, ~test: N.Test<T> -> Bool, ~val: T -> Nat, ~of: Nat -> T, +w: Nat, xs: List<&2, T>) -> Type:
209  {G.prod(~T, ~op, ~test, xs) == prefix_fin(~T, ~of, prod_go(w, vals(~T, ~val, xs), 1n, True{})) : Result<&2, &2, N.NumError, T>}