tests/language/parameter/named2_test.dart

// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
// Dart test program for testing named parameters.
// You may not provide the same parameter as both a positional and a named argument.

int test(int a, [int? b]) {
  return a;
}

main() {
  // Parameter b passed twice, as positional and named.
  test(10, 25, b: 26);
  //           ^
  // [analyzer] COMPILE_TIME_ERROR.UNDEFINED_NAMED_PARAMETER
  // [cfe] No named parameter with the name 'b'.
}