blob: f62eb1cb7938a78a7a2fa01181651829415118e0 [file] [log] [blame]
// 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" }