blob: e8fd15c077f977f9b364acbb1eca260017c0993a [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 If both the extension and the method is generic, then inference
/// must infer the extension type parameters first, to figure out whether the
/// extension applies, and only then start inferring method type parameters. As
/// mentioned above, the inference is similar to other cases of chained inference.
/// @description Check inference infers the extension type first and then infers
/// method type parameter.
/// @author
import "../../Utils/expect.dart";
class A {}
class B extends A {}
class C extends B {}
extension SuperList<T> on List<T> {
void checkme<R extends T>(expected1, expected2) {
Expect.equals(expected1, T);
Expect.equals(expected2, R);
main() {
List<String> list1 = [];
List<A> list2 = [A()];
list1.checkme(String, String);
list2.checkme(A, A);
list2.checkme<A>(A, A);
list2.checkme<B>(A, B);
list2.checkme<C>(A, C);