lrn@google.com
7e6ae8ea09
It now extends ArgumentError. Review URL: https://codereview.chromium.org//11275042 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@14405 260f80e4-7a28-3924-810f-c04153c831b5
38 lines
945 B
Dart
38 lines
945 B
Dart
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// Make sure we use JavaScript semantics when compiling compile-time constants.
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// In this case we test that the value-range analysis uses JavaScript semantics
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// too.
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int inscrutable(int x) {
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if (x == 0) return 0;
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return x | inscrutable(x & (x - 1));
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}
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foo() {
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var a = const [1, 2, 3, 4];
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var i = 8007199254740992;
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if (inscrutable(i) == 0) {
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i++;
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}
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i += 1000000000000000;
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// [i] is now at its maximum 53 bit value. The following increments will not
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// have any effect.
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i++;
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i++;
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i++;
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i -= 1000000000000000;
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i--;
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i--;
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i--;
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i -= 8007199254740992; // In JS semantics [i] would be -3, now.
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return a[i];
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}
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main() {
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Expect.throws(() => foo(),
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(e) => e is RangeError);
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}
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