Generic.Prod.checked: def of bend-collections-laws-math@1.0.0.0
Import: import bend-collections-laws-math@1.0.0.0/spec/math/generic.bend as Generic
Lines 208-209 of bend-collections-laws-math@1.0.0.0/spec/math/generic.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-math@1.0.0.0/spec/math/generic.bend&start_line=208&end_line=209

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

def 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:
  {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>}

Uses (11):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-math@1.0.0.0/spec/math/generic.bend&name=prefix_fin
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-math@1.0.0.0/spec/math/generic.bend&name=prod_go
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-math@1.0.0.0/spec/math/generic.bend&name=vals
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-math@1.0.0.0/src/math/generic.bend&name=prod
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-math@1.0.0.0/src/math/num.bend&name=NumError
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-math@1.0.0.0/src/math/num.bend&name=Op
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-math@1.0.0.0/src/math/num.bend&name=Test