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c544068f6f
R=floitsch@google.com Review URL: https://codereview.chromium.org//897013003 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@43545 260f80e4-7a28-3924-810f-c04153c831b5
73 lines
3 KiB
Dart
73 lines
3 KiB
Dart
// Copyright (c) 2013, 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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// Tests self referencing types.
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import "package:expect/expect.dart";
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class Base<T> {
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get t => T;
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}
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// Derived<T> is contractive.
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class Derived<T> extends Base<Derived<T>> {} /// 00: ok
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// Derived<T> is contractive.
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class Derived<T> extends Base<Derived<Derived<int>>> {} /// 01: ok
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// Derived<T> is non-contractive.
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class Derived<T> extends Base<Derived<Derived<T>>> {} /// 02: ok
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// Derived1<U> and Derived2<V> are contractive.
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class Derived1<U> extends Base<Derived2<U>> {} /// 03: ok
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class Derived2<V> extends Base<Derived1<V>> {} /// 03: ok
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// Derived1<U> and Derived2<V> are non-contractive.
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class Derived1<U> extends Base<Derived2<U>> {} /// 04: ok
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class Derived2<V> extends Base<Derived1<Derived2<V>>> {} /// 04: ok
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main() {
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// In the tests below we test that we get "int" and "bool" when calling
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// toString() on the int and bool type respectively. This is not required
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// behavior. However, we want to keep the original names for the most common
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// core types so we make sure to handle these specifically in the compiler.
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var d;
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d = new Derived(); /// 00: continued
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Expect.equals("Derived", d.t.toString()); /// 00: continued
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d = new Derived<bool>(); /// 00: continued
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Expect.equals("Derived<bool>", d.t.toString()); /// 00: continued
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d = new Derived<Derived>(); /// 00: continued
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Expect.equals("Derived<Derived>", d.t.toString()); /// 00: continued
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d = new Derived(); /// 01: continued
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Expect.equals("Derived<Derived<int>>", d.t.toString()); /// 01: continued
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d = new Derived<bool>(); /// 01: continued
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Expect.equals("Derived<Derived<int>>", d.t.toString()); /// 01: continued
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d = new Derived<Derived>(); /// 01: continued
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Expect.equals("Derived<Derived<int>>", d.t.toString()); /// 01: continued
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d = new Derived(); /// 02: continued
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Expect.equals("Derived<Derived>", d.t.toString()); /// 02: continued
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d = new Derived<bool>(); /// 02: continued
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Expect.equals("Derived<Derived<bool>>", d.t.toString()); /// 02: continued
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d = new Derived<Derived>(); /// 02: continued
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Expect.equals("Derived<Derived<Derived>>", d.t.toString()); /// 02: continued
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d = new Derived1(); /// 03: continued
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Expect.equals("Derived2", d.t.toString()); /// 03: continued
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d = new Derived2(); /// 03: continued
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Expect.equals("Derived1", d.t.toString()); /// 03: continued
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d = new Derived2<Derived1<int>>(); /// 03: continued
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Expect.equals("Derived1<Derived1<int>>", d.t.toString()); /// 03: continued
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d = new Derived1(); /// 04: continued
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Expect.equals("Derived2", d.t.toString()); /// 04: continued
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d = new Derived2(); /// 04: continued
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Expect.equals("Derived1<Derived2>", d.t.toString()); /// 04: continued
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d = new Derived2<Derived1<int>>(); /// 04: continued
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Expect.equals("Derived1<Derived2<Derived1<int>>>", d.t.toString()); /// 04: continued
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}
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