#ifndef BOOST_PREPROCESSOR_ARITHMETIC_ADD_HPP
#define BOOST_PREPROCESSOR_ARITHMETIC_ADD_HPP

// Copyright (C) 2001
// Housemarque Oy
// http://www.housemarque.com
//
// Permission to copy, use, modify, sell and distribute this software is
// granted provided this copyright notice appears in all copies. This
// software is provided "as is" without express or implied warranty, and
// with no claim as to its suitability for any purpose.

// See http://www.boost.org for most recent version.

/*! \file

<a href="../../../../boost/preprocessor/arithmetic/add.hpp">Click here to see the header.</a>
*/

#include <boost/preprocessor/dec.hpp>
#include <boost/preprocessor/inc.hpp>
#include <boost/preprocessor/tuple/elem.hpp>
#include <boost/preprocessor/while.hpp>

//! Expands to the sum of X and Y.
/*!
For example, BOOST_PP_ADD(4,3) expands to 7 (a single token).
*/
#define BOOST_PP_ADD(X,Y) BOOST_PP_ADD_D(0,X,Y)

#ifndef DOXYGEN_SHOULD_SKIP_THIS
#define BOOST_PP_ADD_D(D,X,Y) BOOST_PP_TUPLE_ELEM(2,0,BOOST_PP_WHILE##D(BOOST_PP_ADD_C,BOOST_PP_ADD_F,(X,Y)))
#define BOOST_PP_ADD_C(D,P) BOOST_PP_TUPLE_ELEM(2,1,P)
#define BOOST_PP_ADD_F(D,P) (BOOST_PP_INC(BOOST_PP_TUPLE_ELEM(2,0,P)),BOOST_PP_DEC(BOOST_PP_TUPLE_ELEM(2,1,P)))
#endif

//! Obsolete. Use BOOST_PP_ADD().
#define BOOST_PREPROCESSOR_ADD(X,Y) BOOST_PP_ADD(X,Y)
#endif