mirror of
https://github.com/dart-lang/sdk
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3a79c35f3c
- string/int keys use identity maps - construct the correct type rather than relying on factory constructors when possible - checks if key has identity semantics and use that when possible - avoid helper calls/casts/etc in implementations - use native ES6 Map/Set key order tracking - optimized constructor for map literals - fixes #30466, const maps are now canonicalized correctly Change-Id: Id44acf3d9bf8cb153a4755aa28df08fe91bfc633 Reviewed-on: https://dart-review.googlesource.com/8167 Reviewed-by: Vijay Menon <vsm@google.com>
35 lines
1.1 KiB
Dart
35 lines
1.1 KiB
Dart
// Copyright (c) 2011, 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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main() {
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var map1 = {"foo": 42, "bar": 499};
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var map2 = {};
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var map3 = const {"foo": 42, "bar": 499};
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var map4 = const {};
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var map5 = new Map<String, int>();
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map5["foo"] = 43;
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map5["bar"] = 500;
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var map6 = new Map<String, bool>();
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Expect.isTrue(map1.keys is Iterable<String>);
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Expect.isFalse(map1.keys is Iterable<bool>);
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Expect.isFalse(map2.keys is Iterable<String>);
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Expect.isFalse(map2.keys is Iterable<bool>);
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Expect.isTrue(map3.keys is Iterable<String>);
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Expect.isFalse(map3.keys is Iterable<bool>);
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Expect.isFalse(map4.keys is Iterable<String>);
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Expect.isFalse(map4.keys is Iterable<bool>);
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Expect.isTrue(map5.keys is Iterable<String>);
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Expect.isFalse(map5.keys is Iterable<bool>);
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Expect.isTrue(map6.keys is Iterable<String>);
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Expect.isFalse(map6.keys is Iterable<bool>);
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}
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