blocxx
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00001 /******************************************************************************* 00002 * Copyright (C) 2005, Quest Software, Inc. All rights reserved. 00003 * Copyright (C) 2006, Novell, Inc. All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without 00006 * modification, are permitted provided that the following conditions are met: 00007 * 00008 * * Redistributions of source code must retain the above copyright notice, 00009 * this list of conditions and the following disclaimer. 00010 * * Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * * Neither the name of 00014 * Quest Software, Inc., 00015 * nor Novell, Inc., 00016 * nor the names of its contributors or employees may be used to 00017 * endorse or promote products derived from this software without 00018 * specific prior written permission. 00019 * 00020 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 00021 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00022 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00023 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 00024 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 00025 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 00026 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00027 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00028 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 00029 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 00030 * POSSIBILITY OF SUCH DAMAGE. 00031 *******************************************************************************/ 00032 00033 00034 #ifndef BLOCXX_SAFE_BOOL_HPP_INCLUDE_GUARD_ 00035 #define BLOCXX_SAFE_BOOL_HPP_INCLUDE_GUARD_ 00036 00042 #include "blocxx/BLOCXX_config.h" 00043 00044 namespace BLOCXX_NAMESPACE 00045 { 00046 00047 #ifdef __xlC__ 00048 #define BLOCXX_SAFE_BOOL_IMPL(classname, type, variable, test) \ 00049 operator bool () const \ 00050 { \ 00051 return (test);\ 00052 } \ 00053 bool operator !() const \ 00054 { \ 00055 return !(test); \ 00056 } 00057 #else // functional compilers 00058 #define BLOCXX_SAFE_BOOL_IMPL(classname, type, variable, test) \ 00059 typedef type classname::*safe_bool; \ 00060 operator safe_bool () const \ 00061 { \ 00062 return (test) ? &variable : 0; \ 00063 } \ 00064 bool operator !() const \ 00065 { \ 00066 return !(test); \ 00067 } 00068 #endif 00069 00070 } // end namespace BLOCXX_NAMESPACE 00071 00072 00073 #endif