Robert Nystrom
2bf3259005
Change-Id: I582fa00eb713282c3bd6fc1607efc0242ce9076f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/146686 Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Erik Ernst <eernst@google.com>
58 lines
1.3 KiB
Dart
58 lines
1.3 KiB
Dart
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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/// Dart test program testing generic type allocations and generic type tests.
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import "package:expect/expect.dart";
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class A {
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const A();
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}
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class AA extends A {
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const AA();
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}
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class AX {
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const AX();
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}
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class B<T extends A> {
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final A a_;
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final T t_;
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const B(T t)
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: a_ = t,
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t_ = t;
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isT(x) {
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return x is T;
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}
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}
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class C<T extends A> {
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B<T> b_;
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C(T t) : b_ = new B<T>(t) {}
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}
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class D {
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C<AA> caa_;
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D() : caa_ = new C<AA>(const AA()) {}
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}
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class E {
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C<AX> cax_ = new C<AX>(const AX()); //# 01: compile-time error
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}
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main() {
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D d = new D();
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Expect.equals(true, d.caa_.b_ is B<AA>);
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Expect.equals(true, d.caa_.b_.isT(const AA()));
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C c = new C(const AA()); // inferred as `C<A>` because of the `extends A`.
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Expect.equals(true, c is C<A>);
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Expect.equals(false, c is C<AA>, 'C<A> is not a subtype of C<AA>');
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Expect.equals(true, c.b_ is B);
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Expect.equals(false, c.b_ is B<AA>);
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Expect.equals(true, c.b_.isT(const AA()), 'AA is a subtype of A');
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Expect.equals(false, c.b_.isT(const AX()), 'AX is not a subtype of A');
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new E();
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}
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