| /* |
| * Copyright (c) 2011, 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 A type T is malformed iff: |
| * • T has the form id or the form prefix.id, and in the enclosing lexical |
| * scope, the name id (respectively prefix.id) does not denote a type. |
| * • T denotes a type variable in the enclosing lexical scope, but occurs in |
| * the signature or body of a static member. |
| * • T is a parameterized type of the form G<S1, ..., Sn>, and G is malformed. |
| * • T denotes declarations that were imported from multiple imports clauses. |
| * Any use of a malformed type gives rise to a static warning. A malformed type |
| * is then interpreted as dynamic by the static type checker and the runtime |
| * unless explicitly specified otherwise. |
| * @description Checks that it is a compile error if a malformed type is |
| * used in a subtype test. |
| * @author kaigorodov |
| */ |
| |
| class C<T, U, V> {} |
| class Bounded<T extends num> {} |
| class BoundedInt<T extends int> {} |
| |
| main() { |
| null is UnknownType; //# 01: compile-time error |
| |
| // C<int, double, UnknownType> is not malformed, see |
| // (Types/Parameterized Types) |
| // UnknownType is treated as dynamic and parameterized type is |
| // C<int,double,dynamic> |
| |
| C<int, double, UnknownType> x = new C(); //# 02: compile-time error |
| null is C<int, double, UnknownType>; //# 03: compile-time error |
| Bounded<String> x2 = new Bounded(); //# 04: compile-time error |
| BoundedInt<num> x3 = new BoundedInt(); //# 05: compile-time error |
| C<Bounded<String>, C, C> x4 = new C(); //# 06: compile-time error |
| C<C<UnknownType, int, int>, C, C> x5 = new C(); //# 07: compile-time error |
| } |