Language/Statements/Try/matching_t01.dart

/*
 * Copyright (c) 2011, 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.
 */
/**
 * @assertion An on-catch clause of the form on T catch (p1 , p2 ) s matches an
 * object o if the type of o is a subtype of T.
 * @description Checks that a catch clause with an explicitly specified type T
 * of the first exception parameter does not match a thrown object if it's not
 * null and its type is not a subtype of T.
 * @author vasya
*/
import '../../../Utils/expect.dart';

class A {}
class B extends A {}

main() {
  try {
    try {
      throw new A();
    } on B catch (ex, p2) {
      Expect.fail("This clause shouldn't be executed");
    } on String catch (ex, p2) {
      Expect.fail("This clause shouldn't be executed");
    } on int catch (ex, p2) {
      Expect.fail("This clause shouldn't be executed");
    }
  } on A catch (ok, p2) {}
}