blob: bdbe4edca922816c41e3ce01d81461dcc6e23b3f [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.
/// @Issue 42432
/// @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<num>);
CAlias<int> ca2 = new CAlias<int>();
Expect.isTrue(ca2 is C<int>);
DAlias da = new DAlias();
Expect.isTrue(da is D<num, String>);