Boost C++ Libraries

boost/interprocess/detail/preprocessor.hpp

//////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2008-2012. Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// See http://www.boost.org/libs/interprocess for documentation.
//
//////////////////////////////////////////////////////////////////////////////

#ifndef BOOST_INTERPROCESS_DETAIL_PREPROCESSOR_HPP
#define BOOST_INTERPROCESS_DETAIL_PREPROCESSOR_HPP

#if (defined _MSC_VER) && (_MSC_VER >= 1200)
#  pragma once
#endif

#include <boost/interprocess/detail/config_begin.hpp>

#ifdef BOOST_INTERPROCESS_PERFECT_FORWARDING
#error "This file is not needed when perfect forwarding is available"
#endif

#include <boost/preprocessor/iteration/local.hpp>
#include <boost/preprocessor/repetition/enum_params.hpp>
#include <boost/preprocessor/cat.hpp>
#include <boost/preprocessor/repetition/enum.hpp>
#include <boost/preprocessor/repetition/repeat.hpp>

#define BOOST_INTERPROCESS_MAX_CONSTRUCTOR_PARAMETERS 10

//Note:
//We define template parameters as const references to
//be able to bind temporaries. After that we will un-const them.
//This cast is ugly but it is necessary until "perfect forwarding"
//is achieved in C++0x. Meanwhile, if we want to be able to
//bind rvalues with non-const references, we have to be ugly
#ifndef BOOST_NO_RVALUE_REFERENCES
   #define BOOST_INTERPROCESS_PP_PARAM_LIST(z, n, data) \
   BOOST_PP_CAT(P, n) && BOOST_PP_CAT(p, n) \
   //!
#else
   #define BOOST_INTERPROCESS_PP_PARAM_LIST(z, n, data) \
   const BOOST_PP_CAT(P, n) & BOOST_PP_CAT(p, n) \
   //!
#endif

#ifndef BOOST_NO_RVALUE_REFERENCES
   #define BOOST_INTERPROCESS_PP_PARAM(U, u) \
   U && u \
   //!
#else
   #define BOOST_INTERPROCESS_PP_PARAM(U, u) \
   const U & u \
   //!
#endif

#ifndef BOOST_NO_RVALUE_REFERENCES

   #define BOOST_INTERPROCESS_PP_PARAM_INIT(z, n, data) \
     BOOST_PP_CAT(m_p, n) (::boost::forward< BOOST_PP_CAT(P, n) >( BOOST_PP_CAT(p, n) ))  \
   //!

#else //#ifndef BOOST_NO_RVALUE_REFERENCES

   #define BOOST_INTERPROCESS_PP_PARAM_INIT(z, n, data) \
     BOOST_PP_CAT(m_p, n) (const_cast<BOOST_PP_CAT(P, n) &>(BOOST_PP_CAT(p, n))) \
   //!
#endif

#ifndef BOOST_NO_RVALUE_REFERENCES

   #if defined(BOOST_MOVE_MSVC_10_MEMBER_RVALUE_REF_BUG)

      namespace boost {
      namespace interprocess {
      namespace ipcdetail {
         template<class T>
         struct ref_holder;

         template<class T>
         struct ref_holder<T &>
         {
            ref_holder(T &t)
               : t_(t)
            {}
            T &t_;
            T & get() {  return t_;   }
            T & get_lvalue() {  return t_;   }
         };

         template<class T>
         struct ref_holder<const T>
         {
            ref_holder(const T &t)
               : t_(t)
            {}
            const T &t_;
            const T & get() {  return t_;   }
            const T & get_lvalue() {  return t_;   }
         };

         template<class T>
         struct ref_holder<const T &&>
         {
            ref_holder(const T &t)
               : t_(t)
            {}
            const T &t_;
            const T & get() {  return t_;   }
            const T & get_lvalue() {  return t_;   }
         };

         template<class T>
         struct ref_holder
         {
            ref_holder(T &&t)
               : t_(t)
            {}
            T &t_;
            T && get() {  return ::boost::move(t_);   }
            T & get_lvalue() {  return t_;   }
         };

         template<class T>
         struct ref_holder<T &&>
         {
            ref_holder(T &&t)
               : t(t)
            {}
            T &t;
            T && get()  { return ::boost::move(t_); }
            T & get_lvalue() {  return t_;   }
         };

      }  //namespace ipcdetail {
      }  //namespace interprocess {
      }  //namespace boost {

      #define BOOST_INTERPROCESS_PP_PARAM_DEFINE(z, n, data)  \
         ::boost::interprocess::ipcdetail::ref_holder<BOOST_PP_CAT(P, n)> BOOST_PP_CAT(m_p, n);  \
      //!

      #define BOOST_INTERPROCESS_PP_PARAM_INC(z, n, data)   \
         BOOST_PP_CAT(++m_p, n).get_lvalue()                \
      //!

   #else //BOOST_MOVE_MSVC_10_MEMBER_RVALUE_REF_BUG

      #define BOOST_INTERPROCESS_PP_PARAM_DEFINE(z, n, data)\
      BOOST_PP_CAT(P, n) && BOOST_PP_CAT(m_p, n);           \
      //!

      #define BOOST_INTERPROCESS_PP_PARAM_INC(z, n, data)   \
         BOOST_PP_CAT(++m_p, n)                             \
      //!

   #endif //defined(BOOST_MOVE_MSVC_10_MEMBER_RVALUE_REF_BUG)

#else
   #define BOOST_INTERPROCESS_PP_PARAM_DEFINE(z, n, data)   \
   BOOST_PP_CAT(P, n) & BOOST_PP_CAT(m_p, n);               \
   //!

   #define BOOST_INTERPROCESS_PP_PARAM_INC(z, n, data)      \
      BOOST_PP_CAT(++m_p, n)                                \
   //!

#endif

#define BOOST_INTERPROCESS_PP_PARAM_FORWARD(z, n, data) \
::boost::forward< BOOST_PP_CAT(P, n) >( BOOST_PP_CAT(p, n) ) \
//!

#if !defined(BOOST_NO_RVALUE_REFERENCES) && defined(BOOST_MOVE_MSVC_10_MEMBER_RVALUE_REF_BUG)

   #define BOOST_INTERPROCESS_PP_MEMBER_FORWARD(z, n, data) BOOST_PP_CAT(this->m_p, n).get() \
   //!

   #define BOOST_INTERPROCESS_PP_MEMBER_IT_FORWARD(z, n, data) \
   BOOST_PP_CAT(*m_p, n).get_lvalue()                          \
   //!

#else

   #define BOOST_INTERPROCESS_PP_MEMBER_FORWARD(z, n, data)       \
   ::boost::forward< BOOST_PP_CAT(P, n) >( BOOST_PP_CAT(m_p, n) ) \
   //!

   #define BOOST_INTERPROCESS_PP_MEMBER_IT_FORWARD(z, n, data)    \
   BOOST_PP_CAT(*m_p, n)                                          \
   //!


#endif   //!defined(BOOST_NO_RVALUE_REFERENCES) && defined(BOOST_MOVE_MSVC_10_MEMBER_RVALUE_REF_BUG)

#include <boost/interprocess/detail/config_end.hpp>

#else
#ifdef BOOST_INTERPROCESS_PERFECT_FORWARDING
#error "This file is not needed when perfect forwarding is available"
#endif
#endif //#ifndef BOOST_INTERPROCESS_DETAIL_PREPROCESSOR_HPP