| // Copyright (c) 2020, 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. |
| |
| // Tests elimination of type casts. |
| |
| class A<T> {} |
| |
| class B<T> extends A<T> { |
| testT1(x) => x as T; |
| testT2negative(x) => x as T; |
| testAOfT1(x) => x as A<T>; |
| testAOfT2negative(x) => x as A<T>; |
| } |
| |
| testInt1(x) => x as int; |
| testInt2(x) => x as int; |
| testDynamic(x) => x as dynamic; |
| testObject(x) => x as Object; |
| testBOfInt(x) => x as B<int>; |
| testAOfInt(x) => x as A<int>; |
| testAOfNum(x) => x as A<num>; |
| testAOfAOfB1(x) => x as A<A<B>>; |
| testAOfAOfB2negative(x) => x as A<A<B>>; |
| |
| void main() { |
| testInt1(42); |
| testInt2(null); |
| testDynamic('hi'); |
| testObject('bye'); |
| testBOfInt(new B<int>()); |
| testAOfInt(new B<int>()); |
| testAOfNum(new B<int>()); |
| testAOfAOfB1(new A<A<B>>()); |
| testAOfAOfB2negative(new A<A<A>>()); |
| new B<int>().testT1(42); |
| new B<A<int>>().testT2negative(new A<String>()); |
| new B<A<int>>().testAOfT1(new A<A<int>>()); |
| new B<A<int>>().testAOfT2negative(new A<A<num>>()); |
| } |