repr method

String repr(Object? object)

Implementation

String repr(Object? object) {
  if (object == null) return "None";
  if (object is bool) return object ? "True" : "False";
  if (object is String) {
    // Add quotes and escape internal quotes/backslashes
    String escaped = object
        .replaceAll('\\', '\\\\')
        .replaceAll("'", "\\'")
        .replaceAll('\n', '\\n')
        .replaceAll('\r', '\\r')
        .replaceAll('\t', '\\t');
    // Prefer single quotes unless string contains single quotes but not double
    if (escaped.contains("'") && !escaped.contains('"')) {
      return '"$escaped"';
    }
    return "'$escaped'";
  }
  if (object is PyList) return '[${object.list.map(repr).join(', ')}]';
  if (object is PyTuple) {
    String content = object.tuple.map(repr).join(', ');
    if (object.tuple.length == 1) content += ',';
    return '($content)';
  }
  if (object is Set) {
    if (object.isEmpty) return "set()";
    return '{${object.map(repr).join(', ')}}';
  }
  if (object is Map) {
    return '{${object.entries.map((e) => '${repr(e.key)}: ${repr(e.value)}').join(', ')}}';
  }
  if (object is PyInstance &&
      _isinstanceBuiltin(this, [object, globals.values["Exception"]], {})
          as bool) {
    return "${object.fields["message"]}";
  }
  if (object is PyCallable) {
    return object.toString(); // <fn ...>, <native fn>, <method...>
  }
  if (object is PyClass) return "<class '${object.name}'>";
  if (object is PyInstance) {
    // TODO: call __repr__ when implemented
    return object.toString(); // <MyClass object>
  }
  // Fallback für numbers and basic types
  return object.toString();
}