websocketpp
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C++/Boost Asio based websocket client/server library
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websocketpp
common
cpp11.hpp
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/*
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* Copyright (c) 2013, Peter Thorson. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the WebSocket++ Project nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL PETER THORSON BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef WEBSOCKETPP_COMMON_CPP11_HPP
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#define WEBSOCKETPP_COMMON_CPP11_HPP
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// Hide clang feature detection from other compilers
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#ifndef __has_feature // Optional of course.
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#define __has_feature(x) 0 // Compatibility with non-clang compilers.
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#endif
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#ifndef __has_extension
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#define __has_extension __has_feature // Compatibility with pre-3.0 compilers.
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#endif
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#if defined(_WEBSOCKETPP_CPP11_STL_) || __cplusplus >= 201103L
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// _WEBSOCKETPP_CPP11_STL_ is a flag from the build system that forces
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// WebSocket++ into C++11 mode. __cplusplus is a define set by the compiler
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// if it has full support for C++11 language features. If either are set use
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// C++11 language features
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#ifndef _WEBSOCKETPP_NOEXCEPT_TOKEN_
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#define _WEBSOCKETPP_NOEXCEPT_TOKEN_ noexcept
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#endif
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#ifndef _WEBSOCKETPP_CONSTEXPR_TOKEN_
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#define _WEBSOCKETPP_CONSTEXPR_TOKEN_ constexpr
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#endif
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#ifndef _WEBSOCKETPP_INITIALIZER_LISTS_
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#define _WEBSOCKETPP_INITIALIZER_LISTS_
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#endif
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#ifndef _WEBSOCKETPP_NULLPTR_TOKEN_
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#define _WEBSOCKETPP_NULLPTR_TOKEN_ nullptr
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#endif
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#else
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// Test for noexcept
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#ifndef _WEBSOCKETPP_NOEXCEPT_TOKEN_
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#ifdef _WEBSOCKETPP_NOEXCEPT_
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// build system says we have noexcept
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#define _WEBSOCKETPP_NOEXCEPT_TOKEN_ noexcept
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#else
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#if __has_feature(cxx_noexcept)
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// clang feature detect says we have noexcept
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#define _WEBSOCKETPP_NOEXCEPT_TOKEN_ noexcept
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#else
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// assume we don't have noexcept
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#define _WEBSOCKETPP_NOEXCEPT_TOKEN_
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#endif
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#endif
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#endif
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// Test for constexpr
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#ifndef _WEBSOCKETPP_CONSTEXPR_TOKEN_
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#ifdef _WEBSOCKETPP_CONSTEXPR_
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// build system says we have constexpr
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#define _WEBSOCKETPP_CONSTEXPR_TOKEN_ constexpr
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#else
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#if __has_feature(cxx_constexpr)
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// clang feature detect says we have constexpr
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#define _WEBSOCKETPP_CONSTEXPR_TOKEN_ constexpr
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#else
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// assume we don't have constexpr
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#define _WEBSOCKETPP_CONSTEXPR_TOKEN_
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#endif
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#endif
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#endif
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// Enable initializer lists on clang when available.
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#if __has_feature(cxx_generalized_initializers) && !defined(_WEBSOCKETPP_INITIALIZER_LISTS_)
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#define _WEBSOCKETPP_INITIALIZER_LISTS_
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#endif
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// Test for nullptr
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#ifndef _WEBSOCKETPP_NULLPTR_TOKEN_
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#ifdef _WEBSOCKETPP_NULLPTR_
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// build system says we have nullptr
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#define _WEBSOCKETPP_NULLPTR_TOKEN_ nullptr
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#else
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#if __has_feature(cxx_nullptr)
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// clang feature detect says we have nullptr
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#define _WEBSOCKETPP_NULLPTR_TOKEN_ nullptr
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#elif _MSC_VER >= 1600
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// Visual Studio version that has nullptr
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#define _WEBSOCKETPP_NULLPTR_TOKEN_ nullptr
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#else
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// assume we don't have nullptr
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#define _WEBSOCKETPP_NULLPTR_TOKEN_ 0
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#endif
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#endif
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#endif
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#endif
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#endif // WEBSOCKETPP_COMMON_CPP11_HPP
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