Path.parse constructor

Path.parse(String path)

Construct a Path from string or throw ParseError.

Implementation

factory Path.parse(String path) {
  try {
    // optimize for common single name case
    int dash = path.indexOf('-');
    if (dash < 0) return Path1(path);

    // parse
    int s = 0;
    var acc = <String>[];

    while (true) {
      String n = path.substring(s, dash);
      if (n.isEmpty) throw Exception();
      acc.add(n);
      if (path[dash + 1] != '>') throw Exception();
      s = dash + 2;
      dash = path.indexOf('-', s);

      if (dash < 0) {
        n = path.substring(s, path.length);
        if (n.isEmpty) throw Exception();
        acc.add(n);
        break;
      }
    }
    return PathN(path, acc);
  } catch (e) {
    throw ParseError('Path: $path');
  }
}