94 lines
3.0 KiB
C++
94 lines
3.0 KiB
C++
// Bob Walters 10-2008
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// Test for Container using non-standard pointer types.
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// Copyright (C) 2008-2016 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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// { dg-do compile }
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#include <algorithm>
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#include <testsuite_hooks.h>
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#include <ext/pointer.h>
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using __gnu_cxx::_Pointer_adapter;
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using __gnu_cxx::_Relative_pointer_impl;
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using __gnu_cxx::__static_pointer_cast;
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using __gnu_cxx::__const_pointer_cast;
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struct A {
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int i;
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};
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struct B : public A{
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int j;
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};
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typedef _Pointer_adapter<_Relative_pointer_impl<B> > B_pointer;
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typedef _Pointer_adapter<_Relative_pointer_impl<const B> > const_B_pointer;
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typedef _Pointer_adapter<_Relative_pointer_impl<A> > A_pointer;
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typedef _Pointer_adapter<_Relative_pointer_impl<const A> > const_A_pointer;
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void test01(void) {
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bool test __attribute__((unused)) = true;
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A a;
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B b;
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A_pointer aptr( &a );
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// Can't implicitly cast from A* to B*
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B_pointer bptr1(aptr); // { dg-error "required from here" 31 }
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B_pointer bptr2(&a); // { dg-error "required from here" 32 }
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// but explicit cast/conversion is OK.
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B_pointer bptr3(__static_pointer_cast<B_pointer>(aptr)); // ok
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B_pointer bptr4(__static_pointer_cast<B_pointer>(&a)); // ok
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// Can't implicitly cast from A* to B*
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bptr1 = aptr; // { dg-error "required from here" 39 }
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bptr1 = &a; // { dg-error "required from here" 40 }
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// but explicit cast/conversion is OK.
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bptr1 = __static_pointer_cast<B_pointer>(aptr); // ok
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bptr1 = __static_pointer_cast<B_pointer>(&a); // ok
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// Similarly, can't shed constness via implicit cast
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const_A_pointer captr(&a);
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A_pointer aptr2(captr); // { dg-error "required from here" 48 }
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// but explicit cast/conversion is OK.
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A_pointer aptr3(__const_pointer_cast<A_pointer>(captr)); // ok
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// Similarly, can't shed constness via implicit cast
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aptr2 = captr; // { dg-error "required from here" 54 }
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// but explicit cast/conversion is OK.
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aptr3 = __const_pointer_cast<A_pointer>(captr); // ok
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// Combine explicit const cast with implicit downcast.
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const_B_pointer cbptr(&b);
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A_pointer aptr4(cbptr); // { dg-error "required from here" 61 }
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aptr4 = cbptr; // { dg-error "required from here" 62 }
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A_pointer aptr5(__const_pointer_cast<B_pointer>(cbptr)); // ok
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aptr5 = __const_pointer_cast<B_pointer>(cbptr); // ok
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}
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// { dg-prune-output "include" }
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