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117 lines
2.9 KiB
C++
117 lines
2.9 KiB
C++
/* Copyright (c) 2016, Pollard Banknote Limited
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation and/or
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other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/** @file version.h
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* @brief namespaces for C++11 and C++14
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*/
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#ifndef PBL_CPP_VERSION_H
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#define PBL_CPP_VERSION_H
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#include <cstddef>
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/// @todo Value may not be correct, because as of writing C++17 isn't official
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#if __cplusplus >= 201703L
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#define CPP17
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#endif
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#if __cplusplus >= 201402L
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#define CPP14
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#endif
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#if __cplusplus >= 201103L
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#define CPP11
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#endif
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/* Namespace macros. It's sometimes necessary to put something into the "std"
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* namespace. For example, a specialization of std::hash. These macros can be
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* used to put the code in the correct namespace.
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*/
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#ifdef CPP17
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#define CPP17_NAMESPACE std
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#else
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#define CPP17_NAMESPACE cpp17
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#endif
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#ifdef CPP14
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#define CPP14_NAMESPACE std
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#else
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#define CPP14_NAMESPACE cpp14
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#endif
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#ifdef CPP11
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#define CPP11_NAMESPACE std
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#else
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#define CPP11_NAMESPACE cpp11
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#endif
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namespace cpp11
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{
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}
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#ifndef CPP11
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namespace cpp11
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{
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class nullptr_t
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{
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public:
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template< class T >
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operator T*() const
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{
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return 0;
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}
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template< class C, class T >
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operator T C::*( ) const
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{
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return 0;
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}
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private:
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void operator&() const;
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};
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}
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const cpp11::nullptr_t nullptr = {};
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#endif // ifndef CPP11
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namespace cpp14
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{
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}
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namespace cpp17
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{
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}
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/* cpp points to either std or cpp11/14/17 as appropriate
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*/
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namespace cpp
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{
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using namespace ::std;
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using namespace ::cpp11;
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using namespace ::cpp14;
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using namespace ::cpp17;
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}
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#endif // PBL_CPP_VERSION_H
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