blob: 866374bc98cc866c860e2c479d5de39e0e47a18d [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
* typeParameter ::= metadata identifier (extends typeNotVoid)?
* typeParameters ::= ‘<’ typeParameter (‘,’ typeParameter)* ‘>’
* ...
* Type parameters are declared in the type parameter scope of a class or
* function. ... The type parameters of a generic class declaration [G] are also
* in scope in the [extends] and [implements] clauses of [G] (if these exist)
* and in the body of [G].
* @description Checks that class type parameter is in the scope of its
* [implements] clause.
* @author
import "../../Utils/expect.dart";
class A {}
class B extends A {}
class C<X> {}
class D<X extends A> implements C<X> {}
main() {
Expect.isTrue(D() is C);
Expect.isTrue(D() is C<A>);
Expect.isFalse(D() is C<B>);
Expect.isTrue(D<A>() is C);
Expect.isTrue(D<A>() is C<A>);
Expect.isFalse(D<A>() is C<B>);
Expect.isTrue(D<B>() is C);
Expect.isTrue(D<B>() is C<A>);
Expect.isTrue(D<B>() is C<B>);