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// 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 = 2.7
import "package:expect/expect.dart";
// Make sure we use JavaScript semantics when compiling compile-time constants.
// In this case we test that the value-range analysis uses JavaScript semantics
// too.
int inscrutable(int x) {
if (x == 0) return 0;
return x | inscrutable(x & (x - 1));
}
foo() {
var a = const [1, 2, 3, 4];
var i = 8007199254740992;
if (inscrutable(i) == 0) {
i++;
}
i += 1000000000000000;
// [i] is now at its maximum 53 bit value. The following increments will not
// have any effect.
i++;
i++;
i++;
i -= 1000000000000000;
i--;
i--;
i--;
i -= 8007199254740992; // In JS semantics [i] would be -3, now.
return a[i];
}
main() {
Expect.throws(() => foo(), (e) => e is RangeError);
}