/* * Copyright (c) 2014, Peter Thorson. 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 the WebSocket++ Project nor the * names of its contributors 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 PETER THORSON 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 WEBSOCKETPP_COMMON_CPP11_HPP #define WEBSOCKETPP_COMMON_CPP11_HPP /** * This header sets up some constants based on the state of C++11 support */ // Hide clang feature detection from other compilers #ifndef __has_feature // Optional of course. #define __has_feature(x) 0 // Compatibility with non-clang compilers. #endif #ifndef __has_extension #define __has_extension __has_feature // Compatibility with pre-3.0 compilers. #endif // The code below attempts to use information provided by the build system or // user supplied defines to selectively enable C++11 language and library // features. In most cases features that are targeted individually may also be // selectively disabled via an associated _WEBSOCKETPP_NOXXX_ define. #if defined(_WEBSOCKETPP_CPP11_STL_) || __cplusplus >= 201103L || defined(_WEBSOCKETPP_CPP11_STRICT_) // This check tests for blanket c++11 coverage. It can be activated in one // of three ways. Either the compiler itself reports that it is a full // C++11 compiler via the __cplusplus macro or the user/build system // supplies one of the two preprocessor defines below: // This is defined to allow other WebSocket++ common headers to enable // C++11 features when they are detected by this file rather than // duplicating the above logic in every common header. #define _WEBSOCKETPP_CPP11_INTERNAL_ // _WEBSOCKETPP_CPP11_STRICT_ // // This define reports to WebSocket++ that 100% of the language and library // features of C++11 are available. Using this define on a non-C++11 // compiler will result in problems. // _WEBSOCKETPP_CPP11_STL_ // // This define enables *most* C++11 options that were implemented early on // by compilers. It is typically used for compilers that have many, but not // all C++11 features. It should be safe to use on GCC 4.7-4.8 and perhaps // earlier. #ifndef _WEBSOCKETPP_NOEXCEPT_TOKEN_ #define _WEBSOCKETPP_NOEXCEPT_TOKEN_ noexcept #endif #ifndef _WEBSOCKETPP_CONSTEXPR_TOKEN_ #define _WEBSOCKETPP_CONSTEXPR_TOKEN_ constexpr #endif #ifndef _WEBSOCKETPP_INITIALIZER_LISTS_ #define _WEBSOCKETPP_INITIALIZER_LISTS_ #endif #ifndef _WEBSOCKETPP_NULLPTR_TOKEN_ #define _WEBSOCKETPP_NULLPTR_TOKEN_ nullptr #endif #ifndef _WEBSOCKETPP_MOVE_SEMANTICS_ #define _WEBSOCKETPP_MOVE_SEMANTICS_ #endif #ifndef _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_ #define _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_ #endif #ifndef __GNUC__ // GCC as of version 4.9 (latest) does not support std::put_time yet. // so ignore it #define _WEBSOCKETPP_PUTTIME_ #endif #else // In the absence of a blanket define, try to use compiler versions or // feature testing macros to selectively enable what we can. // Test for noexcept #ifndef _WEBSOCKETPP_NOEXCEPT_TOKEN_ #ifdef _WEBSOCKETPP_NOEXCEPT_ // build system says we have noexcept #define _WEBSOCKETPP_NOEXCEPT_TOKEN_ noexcept #else #if __has_feature(cxx_noexcept) // clang feature detect says we have noexcept #define _WEBSOCKETPP_NOEXCEPT_TOKEN_ noexcept #elif defined(_MSC_VER) && _MSC_VER >= 1900 // Visual Studio 2015+ has noexcept #define _WEBSOCKETPP_NOEXCEPT_TOKEN_ noexcept #else // assume we don't have noexcept #define _WEBSOCKETPP_NOEXCEPT_TOKEN_ #endif #endif #endif // Test for constexpr #ifndef _WEBSOCKETPP_CONSTEXPR_TOKEN_ #ifdef _WEBSOCKETPP_CONSTEXPR_ // build system says we have constexpr #define _WEBSOCKETPP_CONSTEXPR_TOKEN_ constexpr #else #if __has_feature(cxx_constexpr) // clang feature detect says we have constexpr #define _WEBSOCKETPP_CONSTEXPR_TOKEN_ constexpr #elif defined(_MSC_VER) && _MSC_VER >= 1900 // Visual Studio 2015+ has constexpr #define _WEBSOCKETPP_CONSTEXPR_TOKEN_ constexpr #else // assume we don't have constexpr #define _WEBSOCKETPP_CONSTEXPR_TOKEN_ #endif #endif #endif // Enable initializer lists on clang when available. #if __has_feature(cxx_generalized_initializers) && !defined(_WEBSOCKETPP_INITIALIZER_LISTS_) #define _WEBSOCKETPP_INITIALIZER_LISTS_ #endif // Test for nullptr #ifndef _WEBSOCKETPP_NULLPTR_TOKEN_ #ifdef _WEBSOCKETPP_NULLPTR_ // build system says we have nullptr #define _WEBSOCKETPP_NULLPTR_TOKEN_ nullptr #else #if __has_feature(cxx_nullptr) // clang feature detect says we have nullptr #define _WEBSOCKETPP_NULLPTR_TOKEN_ nullptr #elif defined(_MSC_VER) &&_MSC_VER >= 1600 // Visual Studio version that has nullptr #define _WEBSOCKETPP_NULLPTR_TOKEN_ nullptr #else // assume we don't have nullptr #define _WEBSOCKETPP_NULLPTR_TOKEN_ 0 #endif #endif #endif #endif #endif // WEBSOCKETPP_COMMON_CPP11_HPP