def fprod_fold

bend-collections-laws-math@1.0.0.0 · proofs/math/typed/float.bend:97

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

97def fprod_fold(~T: Data, ~op: N.Op<T> -> T, ~test: N.Test<T> -> Bool, ~mo: NoMulOver(~T, ~test), xs: List<&2, T>) -> SG.FProd.fold(~T, ~op, ~test, xs):
98  %Equal.sym(Maybe<&2, T>, G.prod_go(~T, ~op, ~test, xs, Some{op(N.One{})}), Some{SG.fold_mul(~T, ~op, xs, op(N.One{}))}, prod_fold(~T, ~op, ~test, ~mo, xs, op(N.One{}))) : {G.ok(T, _) == Done{SG.fold_mul(~T, ~op, xs, op(N.One{}))} : Result<&2, &2, N.NumError, T>}
99  {==}