1 #ifndef BOOST_PREPROCESSOR_ARITHMETIC_ADD_HPP
2 #define BOOST_PREPROCESSOR_ARITHMETIC_ADD_HPP
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16 #include <boost/preprocessor/dec.hpp>
17 #include <boost/preprocessor/inc.hpp>
18 #include <boost/preprocessor/tuple/elem.hpp>
19 #include <boost/preprocessor/while.hpp>
21 /** <p>Expands to the sum of <code>X</code> and <code>Y</code>.</p>
23 <p>Both <code>X</code> and <code>Y</code> must expand to integer literals
24 in the range [0, BOOST_PP_LIMIT_MAG].</p>
26 <p>For example, <code>BOOST_PP_ADD(4,3)</code> expands to <code>7</code> (a
31 <li><a href="../../test/arithmetic_test.cpp">arithmetic_test.cpp</a></li>
34 #define BOOST_PP_ADD(X,Y) BOOST_PP_ADD_D(0,X,Y)
36 /** <p>Can be used inside BOOST_PP_WHILE() (see for an explanation of the D parameter).</p> */
37 #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)))
39 #define BOOST_PP_ADD_C(D,RC) BOOST_PP_TUPLE_ELEM(2,1,RC)
40 #define BOOST_PP_ADD_F(D,RC) (BOOST_PP_INC(BOOST_PP_TUPLE_ELEM(2,0,RC)),BOOST_PP_DEC(BOOST_PP_TUPLE_ELEM(2,1,RC)))