boost_preprocessor/include/boost/preprocessor/arithmetic/mul.hpp

#ifndef BOOST_PREPROCESSOR_ARITHMETIC_MUL_HPP
#define BOOST_PREPROCESSOR_ARITHMETIC_MUL_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/mul.hpp">Click here to see the header.</a>
*/

#include <boost/preprocessor/arithmetic/add.hpp>

//! Expands to the product of X and Y.
/*!
For example, BOOST_PP_MUL(4,3) expands to 12 (a single token).
*/
#define BOOST_PP_MUL(X,Y) BOOST_PP_MUL_D(0,X,Y)

#ifndef DOXYGEN_SHOULD_SKIP_THIS
#define BOOST_PP_MUL_D(D,X,Y) BOOST_PP_TUPLE_ELEM(3,0,BOOST_PP_WHILE##D(BOOST_PP_MUL_C,BOOST_PP_MUL_F,(0,X,Y)))
#define BOOST_PP_MUL_C(D,P) BOOST_PP_TUPLE3_ELEM2 P
#define BOOST_PP_MUL_F(D,P) (BOOST_PP_ADD_D(D,BOOST_PP_TUPLE3_ELEM0 P,BOOST_PP_TUPLE3_ELEM1 P),BOOST_PP_TUPLE3_ELEM1 P,BOOST_PP_DEC(BOOST_PP_TUPLE3_ELEM2 P))
#endif

//! Obsolete. Use BOOST_PP_MUL().
#define BOOST_PREPROCESSOR_MUL(X,Y) BOOST_PP_MUL(X,Y)
#endif