blob: 7999b8560e972b83a4477ddc4adece58be1af716 [file] [log] [blame]
* Copyright (c) 2019, 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.
* @assertion A generic type alias is a declaration [D] of one of the following
* forms:
* m typedef id<X1extendsB1, ..., Xs extendsBs> = T;
* ...
* where [m] is derived from metadata, [T] is a type, and [S?] is a type or the
* empty string. Let [S0] be [S?] if it is a type, otherwise let [S0] be
* [dynamic]. The associated type of [D], call it [F], is, respectively:
* T
* ...
* @description Checks that non-function generic type alias declaration can
* contain metadata.
* @author
// SharedOptions=--enable-experiment=nonfunction-type-aliases
import "../../Utils/expect.dart";
const i = 1;
class A { const A(); }
class C<T> {}
class D<T1 extends num, T2 extends String> {}
@i typedef CAlias<T extends num> = C<T>;
@A() typedef DAlias<T1 extends num, T2 extends String> = D<T1, T2>;
main() {
CAlias ca1 = new CAlias();
Expect.isTrue(ca1 is C);
CAlias<int> ca2 = new CAlias<int>();
Expect.isTrue(ca2 is C<int>);
DAlias da1 = new DAlias();
Expect.isTrue(da1 is D);
DAlias da2 = new DAlias();
Expect.isTrue(da2 is D);