SafeBool.hpp

Go to the documentation of this file.

/*******************************************************************************
* Copyright (C) 2005, Quest Software, Inc. All rights reserved.
* Copyright (C) 2006, Novell, Inc. All rights reserved.
* 
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 
*     * Redistributions of source code must retain the above copyright notice,
*       this list of conditions and the following disclaimer.
*     * Redistributions in binary form must reproduce the above copyright
*       notice, this list of conditions and the following disclaimer in the
*       documentation and/or other materials provided with the distribution.
*     * Neither the name of 
*       Quest Software, Inc., 
*       nor Novell, Inc., 
*       nor the names of its contributors or employees may be used to 
*       endorse or promote products derived from this software without 
*       specific prior written permission.
* 
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************/


#ifndef BLOCXX_SAFE_BOOL_HPP_INCLUDE_GUARD_
#define BLOCXX_SAFE_BOOL_HPP_INCLUDE_GUARD_

#include "blocxx/BLOCXX_config.h"

namespace BLOCXX_NAMESPACE
{

#ifdef __xlC__
#define BLOCXX_SAFE_BOOL_IMPL(classname, type, variable, test) \
   operator bool () const \
   { \
      return (test);\
   } \
   bool operator !() const \
   { \
      return !(test); \
   }
#else // functional compilers
#define BLOCXX_SAFE_BOOL_IMPL(classname, type, variable, test) \
   typedef type classname::*safe_bool; \
   operator safe_bool () const \
   { \
      return (test) ? &variable : 0; \
   } \
   bool operator !() const \
   { \
      return !(test); \
   }
#endif

} // end namespace BLOCXX_NAMESPACE


#endif