Add named capturing groups to gleam/regex.Match about stdlib HOT 6 OPEN

How would we handle groups with no names?

from stdlib.

named groups can be Some(String) then. if it's named, then there's a string, otherwise Nil. iirc erlang uses PCRE for its regex implementation, so the feature of named strings is technically there. though i'm unsure if the erlang match gives you group names like how it's done with javascript.

from stdlib.

here's how javascript handles it

>> /(?<type_of>new|old)\s+(\w+)/.exec("new match_type")
Array(3) [ "new match_type", "new", "match_type" ]
  0: "new match_type"
  1: "new"
  2: "match_type"
  groups: Object { type_of: "new" }
    type_of: "new"
  index: 0
  input: "new match_type"
  length: 3
  <prototype>: Array []

from stdlib.

due to how Erlang handles matches though, it may be necessary to instead include desired group names in Options.

1> re:run("new match_type", "(?<type_of>new|old)\\s+(\\w+)").
{match,[{0,14},{0,3},{4,10}]}
2> re:run("new match_type", "(?<type_of>new|old)\\s+(\\w+)", [{capture, ["type_of"], list}]).
{match,["new"]}

from stdlib.

I see now gleam/regex is meant to be a port of Elm's Regex package and they unfortunately don't have a way to extract capturing group names either. Straying from this would have to be a decision. 🤷

from stdlib.

I see now gleam/regex is meant to be a port of Elm's Regex package

It's not a port, similarity is incidental

from stdlib.