def nonneg

cswap-bend-cli@0.1.0.0 · importu.bend:24

import Base

24def nonneg(m: Maybe<&2, String>) -> Maybe<&2, String>:
25  match m:
26    case Some{+s}:
27      neg.pick(String.starts_with(s, "-"), s)
28    case None{}:
29      None{}