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- // Bob Walters 10-2008
- // Test for Container using non-standard pointer types.
- // Copyright (C) 2008-2022 Free Software Foundation, Inc.
- //
- // This file is part of the GNU ISO C++ Library. This library is free
- // software; you can redistribute it and/or modify it under the
- // terms of the GNU General Public License as published by the
- // Free Software Foundation; either version 3, or (at your option)
- // any later version.
- // This library is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU General Public License for more details.
- // You should have received a copy of the GNU General Public License along
- // with this library; see the file COPYING3. If not see
- // <http://www.gnu.org/licenses/>.
- // { dg-do compile }
- #include <algorithm>
- #include <testsuite_hooks.h>
- #include <ext/pointer.h>
- using __gnu_cxx::_Pointer_adapter;
- using __gnu_cxx::_Relative_pointer_impl;
- using __gnu_cxx::__static_pointer_cast;
- using __gnu_cxx::__const_pointer_cast;
- struct A {
- int i;
- };
- struct B : public A{
- int j;
- };
- typedef _Pointer_adapter<_Relative_pointer_impl<B> > B_pointer;
- typedef _Pointer_adapter<_Relative_pointer_impl<const B> > const_B_pointer;
- typedef _Pointer_adapter<_Relative_pointer_impl<A> > A_pointer;
- typedef _Pointer_adapter<_Relative_pointer_impl<const A> > const_A_pointer;
- void test01(void) {
- A a;
- B b;
- A_pointer aptr( &a );
- // Can't implicitly cast from A* to B*
- B_pointer bptr1(aptr); // { dg-error "required from here" 31 }
- B_pointer bptr2(&a); // { dg-error "required from here" 32 }
- // but explicit cast/conversion is OK.
- B_pointer bptr3(__static_pointer_cast<B_pointer>(aptr)); // ok
- B_pointer bptr4(__static_pointer_cast<B_pointer>(&a)); // ok
- // Can't implicitly cast from A* to B*
- bptr1 = aptr; // { dg-error "required from here" 39 }
- bptr1 = &a; // { dg-error "required from here" 40 }
- // but explicit cast/conversion is OK.
- bptr1 = __static_pointer_cast<B_pointer>(aptr); // ok
- bptr1 = __static_pointer_cast<B_pointer>(&a); // ok
- // Similarly, can't shed constness via implicit cast
- const_A_pointer captr(&a);
- A_pointer aptr2(captr); // { dg-error "required from here" 48 }
- // but explicit cast/conversion is OK.
- A_pointer aptr3(__const_pointer_cast<A_pointer>(captr)); // ok
- // Similarly, can't shed constness via implicit cast
- aptr2 = captr; // { dg-error "required from here" 54 }
- // but explicit cast/conversion is OK.
- aptr3 = __const_pointer_cast<A_pointer>(captr); // ok
- // Combine explicit const cast with implicit downcast.
- const_B_pointer cbptr(&b);
- A_pointer aptr4(cbptr); // { dg-error "required from here" 61 }
- aptr4 = cbptr; // { dg-error "required from here" 62 }
- A_pointer aptr5(__const_pointer_cast<B_pointer>(cbptr)); // ok
- aptr5 = __const_pointer_cast<B_pointer>(cbptr); // ok
- }
- // { dg-prune-output "include" }
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