blob: 2442335d76aa863778c60d9d284a848445f58f3a [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 class declaration introduces a generic class into the
* enclosing library scope. A generic class is a mapping that accepts a list of
* actual type arguments and maps them to a class. Consider a generic class
* declaration [G] named [C] with formal type parameter declarations [X1 extends
* B1,..., Xm extends Bm], and a parameterized type [T] of the form
* [C<T1,..., Tl>].
* Otherwise, said parameterized type [C<T1,..., Tm>] denotes an application of
* the generic class declared by [G] to the type arguments [T1],...,[Tm]. This
* yields a class [C0] whose members are equivalent to those of a class
* declaration which is obtained from the declaration [G] by replacing each
* occurrence of [Xj] by [Tj].
* @description Checks that each occurrence of [Xj] is replaced by [Tj] for
* generic class [C0] with several parameters.
* @author
import "dart:async";
import "../../Utils/expect.dart";
class A<X extends A<X>> {}
class C<T1, T2, T3> {
check(exp1, exp2, exp3) {
Expect.equals(exp1, T1);
Expect.equals(exp2, T2);
Expect.equals(exp3, T3);
main() {
(new C<int, int, int>()).check(int, int, int);
(new C<List, dynamic, String>()).check(List, dynamic, String);
(new C<String, Null, Null>()).check(String, Null, Null);
(new C<C, C, C>()).check(C, C, C);
(new C<A, C, C>()).check(A, C, C);
(new C<dynamic, dynamic, dynamic>()).check(dynamic, dynamic, dynamic);
(new C<Null, Null, Null>()).check(Null, Null, Null);
(new C<Object, List, FutureOr>()).check(Object, List, FutureOr);
(new C<FutureOr, dynamic, dynamic>()).check(FutureOr, dynamic, dynamic);