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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libstdc++-v3/] [testsuite/] [ext/] [ext_pointer/] [1_neg.cc] - Rev 753
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// Bob Walters 10-2008 // Test for Container using non-standard pointer types. // Copyright (C) 2008, 2009 // 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) { bool test __attribute__((unused)) = true; 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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