string.split missing but present in dart-sass 1.57.0

[xpe]

grass doesn't yet support string.split, which has been available in dart-sass since 1.57.0.

https://sass-lang.com/documentation/modules/string/#split

string.split($string, $separator, $limit: null) //=> list

Compatibility:

• Dart Sass since 1.57.0
• LibSass: ✗
• Ruby Sass: ✗

Returns a bracketed, comma-separated list of substrings of $string that are separated by $separator. The $separators aren’t included in these substrings.

If $limit is a number 1 or higher, this splits on at most that many $separators (and so returns at most $limit + 1 strings). The last substring contains the rest of the string, including any remaining $separators.

[xpe]

Here is the current source code for split from dart-sass

/// The Sass string module.
final module = BuiltInModule("string", functions: <Callable>[
  _unquote, _quote, _toUpperCase, _toLowerCase, _length, _insert, _index, //
  _slice, _uniqueId,

  _function("split", r"$string, $separator, $limit: null", (arguments) {
    var string = arguments[0].assertString("string");
    var separator = arguments[1].assertString("separator");
    var limit = arguments[2].realNull?.assertNumber("limit").assertInt("limit");

    if (limit != null && limit < 1) {
      throw SassScriptException("\$limit: Must be 1 or greater, was $limit.");
    }

    if (string.text.isEmpty) {
      return const SassList.empty(
          separator: ListSeparator.comma, brackets: true);
    } else if (separator.text.isEmpty) {
      return SassList(
          string.text.runes.map((rune) =>
              SassString(String.fromCharCode(rune), quotes: string.hasQuotes)),
          ListSeparator.comma,
          brackets: true);
    }

    var i = 0;
    var lastEnd = 0;
    var chunks = <String>[];
    for (var match in separator.text.allMatches(string.text)) {
      chunks.add(string.text.substring(lastEnd, match.start));
      lastEnd = match.end;

      i++;
      if (i == limit) break;
    }
    chunks.add(string.text.substring(lastEnd));

    return SassList(
        chunks.map((chunk) => SassString(chunk, quotes: string.hasQuotes)),
        ListSeparator.comma,
        brackets: true);
  }),
]);

[connorskees]

closed by #96