Regex.spans: def of bend-kit-regex@0.8.0.0
Import: import bend-kit-regex@0.8.0.0/regex.bend as Regex
Lines 1182-1189 of bend-kit-regex@0.8.0.0/regex.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-regex@0.8.0.0/regex.bend&start_line=1182&end_line=1189

import Base

def spans(caps: List<&2, Maybe<&2, U32>>) -> List<&2, Maybe<&2, Span>>:
  match caps:
    case Con{Some{a}, Con{Some{b}, t}}:
      Some{Span{a, b}} <> spans(t)
    case Con{x, Con{y, t}}:
      None{} <> spans(t)
    case _:
      Nil{}

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=bend-kit-regex@0.8.0.0/regex.bend&name=Span