| // checking template overloads on return type |
| |
| /*************************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed |
| * with this work for additional information regarding copyright |
| * ownership. The ASF licenses this file to you under the Apache |
| * License, Version 2.0 (the License); you may not use this file |
| * except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
| * implied. See the License for the specific language governing |
| * permissions and limitations under the License. |
| * |
| * Copyright 1999-2007 Rogue Wave Software, Inc. |
| * |
| **************************************************************************/ |
| |
| |
| template <class T> |
| struct A { char dummy [8]; }; |
| |
| template <class T, class U> |
| struct B { T t; char dummy [16]; }; |
| |
| |
| // exercise the compiler's ability to define a function template |
| // whose template paramenter is used only in the return type of |
| // the template and not in its argument list; this requires that |
| // the type of the template argument be mangled into the name of |
| // each specialization of the template |
| |
| template <class T, class U> |
| T bar (U) |
| { |
| return T (); |
| } |
| |
| int size; |
| |
| template <class T> |
| T foo () |
| { |
| size = sizeof (T); |
| |
| return bar<T>(""); |
| } |
| |
| template <class T, class U> |
| B<T, U> foobar () |
| { |
| return foo<B<T, U> >(); |
| } |
| |
| |
| int main () |
| { |
| int result = 0; |
| |
| foo<char>(); |
| |
| if (size != sizeof (char)) |
| result = result << 1 + 1; |
| |
| foo<A<char> >(); |
| |
| if (size != sizeof (A<char>)) |
| result = result << 1 + 1; |
| |
| foo<B<A<char>, int> >(); |
| |
| if (size != sizeof (B<A<char>, int>)) |
| result = result << 1 + 1; |
| |
| foobar<char, B<char, A<int> > >(); |
| |
| if (size != sizeof (B<char, B<char, A<int> > >)) |
| result = result << 1 + 1; |
| |
| return result; |
| } |