Stephen Adams
8ee403e86c
Change-Id: I05a1814f2a2c5810f75708ba72bfafe137122f67 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/332486 Commit-Queue: Stephen Adams <sra@google.com> Reviewed-by: Mark Zhou <markzipan@google.com>
48 lines
1.2 KiB
Dart
48 lines
1.2 KiB
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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import "package:expect/expect.dart";
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var myIdentical = identical;
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class Point {
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num x, y;
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Point(this.x, this.y);
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}
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main() {
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// int.
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Expect.isTrue(myIdentical(42, 42));
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Expect.isFalse(myIdentical(42, 41));
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// double.
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Expect.isTrue(myIdentical(42.0, 42.0));
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Expect.isFalse(myIdentical(42.0, 41.0));
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// Mint (2^45).
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Expect.isTrue(myIdentical(35184372088832, 35184372088832));
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Expect.isFalse(myIdentical(35184372088832, 35184372088831));
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// Different types.
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Expect.isFalse(myIdentical("hello", 41));
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// Points.
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var p = new Point(1, 1);
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var q = new Point(1, 1);
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Expect.isFalse(myIdentical(p, q));
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// Strings.
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var a = "hello";
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var b = "hello";
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// Identical strings are coalesced into single instances.
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Expect.isTrue(myIdentical(a, b));
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// Null handling.
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Expect.isFalse(myIdentical(42, null));
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Expect.isTrue(myIdentical(null, null));
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// Assigning to the variable prevents dart2js from optimizing calls.
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myIdentical = identical;
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}
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