aux_/preprocessor/default_params.hpp

0001
0002 #ifndef BOOST_MPL_AUX_PREPROCESSOR_DEFAULT_PARAMS_HPP_INCLUDED
0003 #define BOOST_MPL_AUX_PREPROCESSOR_DEFAULT_PARAMS_HPP_INCLUDED
0004
0005 // Copyright Aleksey Gurtovoy 2002-2004
0006 //
0007 // Distributed under the Boost Software License, Version 1.0.
0008 // (See accompanying file LICENSE_1_0.txt or copy at
0009 // http://www.boost.org/LICENSE_1_0.txt)
0010 //
0011 // See http://www.boost.org/libs/mpl for documentation.
0012
0013 // $Id$
0014 // $Date$
0015 // $Revision$
0016
0017 #include <boost/mpl/aux_/config/preprocessor.hpp>
0018
0019 // BOOST_MPL_PP_DEFAULT_PARAMS(0,T,int): <nothing>
0020 // BOOST_MPL_PP_DEFAULT_PARAMS(1,T,int): T1 = int
0021 // BOOST_MPL_PP_DEFAULT_PARAMS(2,T,int): T1 = int, T2 = int
0022 // BOOST_MPL_PP_DEFAULT_PARAMS(n,T,int): T1 = int, T2 = int, .., Tn = int
0023
0024 #if !defined(BOOST_MPL_CFG_NO_OWN_PP_PRIMITIVES)
0025
0026 #   include <boost/preprocessor/cat.hpp>
0027
0028 #   define BOOST_MPL_PP_DEFAULT_PARAMS(n,p,v) \
0029     BOOST_PP_CAT(BOOST_MPL_PP_DEFAULT_PARAMS_,n)(p,v) \
0030     /**/
0031
0032 #   define BOOST_MPL_PP_DEFAULT_PARAMS_0(p,v)
0033 #   define BOOST_MPL_PP_DEFAULT_PARAMS_1(p,v) p##1=v
0034 #   define BOOST_MPL_PP_DEFAULT_PARAMS_2(p,v) p##1=v,p##2=v
0035 #   define BOOST_MPL_PP_DEFAULT_PARAMS_3(p,v) p##1=v,p##2=v,p##3=v
0036 #   define BOOST_MPL_PP_DEFAULT_PARAMS_4(p,v) p##1=v,p##2=v,p##3=v,p##4=v
0037 #   define BOOST_MPL_PP_DEFAULT_PARAMS_5(p,v) p##1=v,p##2=v,p##3=v,p##4=v,p##5=v
0038 #   define BOOST_MPL_PP_DEFAULT_PARAMS_6(p,v) p##1=v,p##2=v,p##3=v,p##4=v,p##5=v,p##6=v
0039 #   define BOOST_MPL_PP_DEFAULT_PARAMS_7(p,v) p##1=v,p##2=v,p##3=v,p##4=v,p##5=v,p##6=v,p##7=v
0040 #   define BOOST_MPL_PP_DEFAULT_PARAMS_8(p,v) p##1=v,p##2=v,p##3=v,p##4=v,p##5=v,p##6=v,p##7=v,p##8=v
0041 #   define BOOST_MPL_PP_DEFAULT_PARAMS_9(p,v) p##1=v,p##2=v,p##3=v,p##4=v,p##5=v,p##6=v,p##7=v,p##8=v,p##9=v
0042
0043 #else
0044
0045 #   include <boost/preprocessor/tuple/elem.hpp>
0046 #   include <boost/preprocessor/comma_if.hpp>
0047 #   include <boost/preprocessor/repeat.hpp>
0048 #   include <boost/preprocessor/inc.hpp>
0049 #   include <boost/preprocessor/cat.hpp>
0050
0051 #   define BOOST_MPL_PP_AUX_DEFAULT_PARAM_FUNC(unused, i, pv) \
0052     BOOST_PP_COMMA_IF(i) \
0053     BOOST_PP_CAT( BOOST_PP_TUPLE_ELEM(2,0,pv), BOOST_PP_INC(i) ) \
0054         = BOOST_PP_TUPLE_ELEM(2,1,pv) \
0055     /**/
0056
0057 #   define BOOST_MPL_PP_DEFAULT_PARAMS(n, param, value) \
0058     BOOST_PP_REPEAT( \
0059           n \
0060         , BOOST_MPL_PP_AUX_DEFAULT_PARAM_FUNC \
0061         , (param,value) \
0062         ) \
0063     /**/
0064
0065 #endif
0066
0067 #endif // BOOST_MPL_AUX_PREPROCESSOR_DEFAULT_PARAMS_HPP_INCLUDED