def mapped_cons

bend-collections@1.0.0.0 · src/containers/internal/intrusive_list.bend:515

import Base

515def mapped_cons(~T: Type, m: Maybe<&1, T>, xs: List<&1, T>) -> List<&1, T>:
516  match m:
517    case None{}: xs
518    case Some{x}: Con{x, xs}