Dmitry Stefantsov
e2c823a339
The tests cover some basic cases of generic methods usage, so some tests for corner cases may be added later. The tests are put into 'tests/language_strong' directory, and they are currently skipped by the test system as described in the file 'language_strong.status'. R=asgerf@google.com, eernst@google.com, floitsch@google.com, leafp@google.com Review-Url: https://codereview.chromium.org/2737933002 .
51 lines
1.0 KiB
Dart
51 lines
1.0 KiB
Dart
// Copyright (c) 2017, 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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// Test that a type variable can be used to declare local variables, and that
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// these local variables are of correct type.
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library generic_methods_local_variable_declaration_test;
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import "package:expect/expect.dart";
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class X {}
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abstract class Generator<T> {
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T generate();
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}
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class A implements Generator<A> {
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generate() {
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return new A();
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}
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String toString() => "instance of A";
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}
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class B implements Generator<B> {
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generate() {
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return new B();
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}
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String toString() => "instance of B";
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}
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String fun<T extends Generator<T>>(T t) {
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T another = t.generate();
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String anotherName = "$another";
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Expect.isTrue(another is T);
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Expect.isTrue(another is Generator<T>);
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return anotherName;
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}
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main() {
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A a = new A();
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B b = new B();
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Expect.equals(fun<A>(a), "instance of A");
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Expect.equals(fun<B>(b), "instance of B");
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}
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