73ef4ff3
 Hu Chunming
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/*
* 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_FUNCTIONAL_HPP
#define WEBSOCKETPP_COMMON_FUNCTIONAL_HPP
#include <websocketpp/common/cpp11.hpp>
// If we've determined that we're in full C++11 mode and the user hasn't
// explicitly disabled the use of C++11 functional header, then prefer it to
// boost.
#if defined _WEBSOCKETPP_CPP11_INTERNAL_ && !defined _WEBSOCKETPP_NO_CPP11_FUNCTIONAL_
#ifndef _WEBSOCKETPP_CPP11_FUNCTIONAL_
#define _WEBSOCKETPP_CPP11_FUNCTIONAL_
#endif
#endif
// If we're on Visual Studio 2010 or higher and haven't explicitly disabled
// the use of C++11 functional header then prefer it to boost.
#if defined(_MSC_VER) && _MSC_VER >= 1600 && !defined _WEBSOCKETPP_NO_CPP11_FUNCTIONAL_
#ifndef _WEBSOCKETPP_CPP11_FUNCTIONAL_
#define _WEBSOCKETPP_CPP11_FUNCTIONAL_
#endif
#endif
#ifdef _WEBSOCKETPP_CPP11_FUNCTIONAL_
#include <functional>
#else
#include <boost/bind.hpp>
#include <boost/function.hpp>
#include <boost/ref.hpp>
#endif
namespace websocketpp {
namespace lib {
#ifdef _WEBSOCKETPP_CPP11_FUNCTIONAL_
using std::function;
using std::bind;
using std::ref;
namespace placeholders = std::placeholders;
// There are some cases where a C++11 compiler balks at using std::ref
// but a C++03 compiler using boost function requires boost::ref. As such
// lib::ref is not useful in these cases. Instead this macro allows the use
// of boost::ref in the case of a boost compile or no reference wrapper at
// all in the case of a C++11 compile
#define _WEBSOCKETPP_REF(x) x
template <typename T>
void clear_function(T & x) {
x = nullptr;
}
#else
using boost::function;
using boost::bind;
using boost::ref;
namespace placeholders {
/// \todo this feels hacky, is there a better way?
using ::_1;
using ::_2;
using ::_3;
}
// See above definition for more details on what this is and why it exists
#define _WEBSOCKETPP_REF(x) boost::ref(x)
template <typename T>
void clear_function(T & x) {
x.clear();
}
#endif
} // namespace lib
} // namespace websocketpp
#endif // WEBSOCKETPP_COMMON_FUNCTIONAL_HPP
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