| // Copyright (c) 2013, 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 test program for constructors and initializers. |
| |
| // @dart = 2.9 |
| |
| // Check function subtyping for bound closures. |
| |
| import 'package:expect/expect.dart'; |
| |
| typedef Foo<T>(T t); |
| |
| class Class<T> { |
| foo(Foo<T> o) => o is Foo<T>; |
| } |
| |
| bar(int i) {} |
| |
| baz<T>(Foo<T> o) => o is Foo<T>; |
| |
| void main() { |
| dynamic f = new Class<int>().foo; |
| Expect.isTrue(f(bar)); |
| Expect.isTrue(f is Foo<Foo<int>>); |
| Expect.isFalse(f is Foo<int>); |
| Expect.isFalse(f is Foo<Object>); |
| Expect.throwsTypeError(() => f(f)); |
| Expect.throwsTypeError(() => f(42)); |
| |
| Foo<Foo<int>> bazInt = baz; // implicit instantiation baz<int> |
| f = bazInt; |
| Expect.isTrue(f(bar)); |
| Expect.isFalse(f is Foo<int>); |
| Expect.throwsTypeError(() => f(f)); |
| Expect.throwsTypeError(() => f(42)); |
| } |