Language/Expressions/Throw/evaluation_t04.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 Evaluation of a throw expression of the form throw e; proceeds as
 * follows:
 * The expression e is evaluated yielding a value v.
 * If v evaluates to null, then a NullThrownError is thrown. Otherwise, control
 * is transferred to the nearest dynamically enclosing exception handler, with
 * the current exception set to v and the current return value becomes
 * undefined.
 * @description Checks that attempting to throw null in any manner results in
 * NullThrownError being thrown instead.
 * @author rodionov
 */
import '../../../Utils/expect.dart';

n() => null;
n2() {}

main() {
  Expect.throws(() { throw n() ; }, (e) => e is NullThrownError);
  Expect.throws(() { throw n2(); }, (e) => e is NullThrownError);
}