Gleam replace with a capturing group?

[tiny belfry]

Its currently not replacing \1 with the actual captured group even though the implementation in the erlang re supports perl style regex replacement. Any help?

  let assert Ok(arithmetic) = regex.from_string("(\\*|\\/|%|-|\\+|<|>)")

  let reply =
    regex.replace(
      each: arithmetic,
      in: reply,
      with: highlight_ansi("\\1", FgBlue),
    )

here's my current code

i basically want to get an operator and highlight it in blue

nvm i was stupid