Robert Nystrom
07e606ec65
Change-Id: I51434a653b5b9ef65a185dc11cdff2aa9ab3e359 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/142546 Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Erik Ernst <eernst@google.com> Commit-Queue: Bob Nystrom <rnystrom@google.com>
68 lines
2.1 KiB
Dart
68 lines
2.1 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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//
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// Dart test program testing the use of 'dynamic' in generic types.
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import "package:expect/expect.dart";
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abstract class Iface<K, V> {}
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class M1<K, V> implements Iface<K, V> {}
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class M2<K> implements Iface<K, dynamic> {}
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class M3 implements Iface<String, dynamic> {}
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typedef dynamic F1<T>(dynamic x, T y);
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class HasFieldDynamic {
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HasFieldDynamic() : dynamic = "dynamic" {}
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var dynamic; // Field named dynamic is allowed.
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}
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class HasMethodDynamic {
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dynamic() => "dynamic"; // Method named dynamic is allowed.
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}
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main() {
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// dynamic is a top-type, equivalent to Object at runtime.
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Expect.isTrue(dynamic is Type);
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Expect.equals(dynamic, dynamic);
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// dynamic is not a subtype of num or String.
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M1<dynamic, dynamic> m1 = new M1<dynamic, dynamic>();
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Expect.isFalse(m1 is Iface<dynamic, num>);
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Expect.isFalse(m1 is Iface<String, dynamic>);
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Expect.isFalse(m1 is Iface<String, num>);
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Expect.isFalse(m1 is Iface<num, String>);
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M2<dynamic> m2 = new M2<dynamic>(); // is Iface<dynamic, dynamic>.
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Expect.isFalse(m2 is Iface<dynamic, num>);
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Expect.isFalse(m2 is Iface<String, dynamic>);
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Expect.isFalse(m2 is Iface<String, num>);
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Expect.isFalse(m2 is Iface<num, String>);
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M3 m3 = new M3(); // is IFace<String, dynamic>.
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Expect.isFalse(m3 is Iface<dynamic, num>);
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Expect.isTrue(m3 is Iface<String, dynamic>);
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Expect.isFalse(m3 is Iface<String, num>);
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Expect.isTrue(m3 is! Iface<num, String>);
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F1<int> f1 = (dynamic s, int i) => s[i]; // is dynamic Function(dynamic, int).
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Expect.isTrue(f1 is F1<int>);
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// "dynamic" is not a reserved word or built-in identifier.
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HasFieldDynamic has_field = new HasFieldDynamic();
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Expect.equals("dynamic", has_field.dynamic);
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HasMethodDynamic has_method = new HasMethodDynamic();
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Expect.equals("dynamic", has_method.dynamic());
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{
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int dynamic = 0; // Local variable named dynamic is allowed.
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Expect.equals(0, dynamic);
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}
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}
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