http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/wvstreams/xplc/delete.h

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- * * XPLC - Cross-Platform Lightweight Components * Copyright (C) 2004, Net Integration Technologies, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * as published by the Free Software Foundation; either version 2.1 of * the License, 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA * * As a special exception, you may use this file as part of a free * software library without restriction. Specifically, if other files * instantiate templates or use macros or inline functions from this * file, or you compile this file and link it with other files to * produce an executable, this file does not by itself cause the * resulting executable to be covered by the GNU Lesser General Public * License. This exception does not however invalidate any other * reasons why the executable file might be covered by the GNU Lesser * General Public License. */ #ifndef __XPLC_DELETE_H__ #define __XPLC_DELETE_H__ #if defined(__GNUC__) && __GNUC__ > 3 # pragma GCC system_header #endif /** \file * * Include this file right after IObject.h (or instead of) to detect * accidental uses of "delete" on an %XPLC interface. Use "xplcdelete" * instead of "delete" when you know what you are doing. */ #include <new> #include <memory> #ifdef __XPLC_IOBJECT_H__ #error "<xplc/delete.h> has to be included before <xplc/IObject.h>." #endif #include <xplc/IObject.h> /** * \defgroup DeleteDetector This is the "delete detector". */ /// \ingroup DeleteDetector class CheckIObject {}; class CheckIObjectOk {}; /// \ingroup DeleteDetector class CheckIObjectOkVector {}; template<class T> class ConversionIObject { public: //@{ typedef char Yes; /// \ingroup DeleteDetector struct No { char dummy[2]; }; static T* from; static Yes test(const IObject*); static No test(...); //@} }; template<bool> struct XPLC_CTAssert; template<> /// \ingroup DeleteDetector struct XPLC_CTAssert<true> {}; template<class T> inline void operator&&(CheckIObject, const T* obj) { static_cast<void>(sizeof(XPLC_CTAssert<(sizeof(ConversionIObject<T>::test(ConversionIObject<T>::from)) != sizeof(typename ConversionIObject<T>::Yes))>)); delete obj; } template<class T> inline void operator&&(CheckIObjectOk, const T* obj) { delete obj; } template<class T> inline void operator&&(CheckIObjectOkVector, const T* obj) { delete[] obj; } /** * Undefine xplcdelete. <xplc/utils.h> defines xplcdelete, we should * undo this, in case it has been included before. */ #undef xplcdelete /** * Macro used to indicate a valid use of the delete keyword with an * XPLC interface. In some cases, you really need to use delete on an * object that derives from IObject. In those cases, use "xplcdelete" * instead of "delete". */ #define xplcdelete CheckIObjectOk() && /** * Overriding the delete keyword. This replaces the delete keyword * with an invocation of the operator&& using a specific marker class * as the left operand, allowing it to be templated on the right * operand. */ #define delete CheckIObject() && /** * Remplacement for delete[]. Because we cannot capture usage of * delete[] using macros, we have to add a replacement for it, * unfortunately. */ #define deletev CheckIObjectOkVector() && #endif /* __XPLC_DELETE_H__ */