| // Copyright 2008 Christophe Henry |
| // henry UNDERSCORE christophe AT hotmail DOT com |
| // This is an extended version of the state machine available in the boost::mpl library |
| // Distributed under the same license as the original. |
| // Copyright for the original version: |
| // Copyright 2005 David Abrahams and Aleksey Gurtovoy. 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) |
| |
| #ifndef BOOST_MSM_BACK_ARGS_H |
| #define BOOST_MSM_BACK_ARGS_H |
| |
| #include <boost/preprocessor/repetition/enum_params.hpp> |
| #include <boost/preprocessor/arithmetic/sub.hpp> |
| #include <boost/preprocessor/punctuation/comma_if.hpp> |
| #include <boost/preprocessor/control/expr_if.hpp> |
| #include <boost/preprocessor/punctuation/comma.hpp> |
| #include <boost/preprocessor/arithmetic/add.hpp> |
| #include <boost/preprocessor/cat.hpp> |
| #include <boost/preprocessor/comparison/less.hpp> |
| #include <boost/preprocessor/arithmetic/dec.hpp> |
| #include <boost/function.hpp> |
| |
| #ifndef BOOST_MSM_VISITOR_ARG_SIZE |
| #define BOOST_MSM_VISITOR_ARG_SIZE 2 // default max number of arguments |
| #endif |
| |
| namespace boost { namespace msm { namespace back |
| { |
| struct none {}; |
| #define MSM_ARGS_TYPEDEF_SUB(z, n, unused) typedef ARG ## n argument ## n ; |
| #define MSM_ARGS_PRINT(z, n, data) data |
| #define MSM_ARGS_NONE_PRINT(z, n, data) class data ## n = none \ |
| BOOST_PP_COMMA_IF( BOOST_PP_LESS(n, BOOST_PP_DEC(BOOST_MSM_VISITOR_ARG_SIZE) ) ) |
| |
| #define MSM_VISITOR_MAIN_ARGS(n) \ |
| template <class RES, \ |
| BOOST_PP_REPEAT(BOOST_MSM_VISITOR_ARG_SIZE, MSM_ARGS_NONE_PRINT, ARG)> \ |
| struct args \ |
| { \ |
| typedef ::boost::function<RES(BOOST_PP_ENUM_PARAMS(n, ARG))> type; \ |
| enum {args_number=n}; \ |
| BOOST_PP_REPEAT(n, MSM_ARGS_TYPEDEF_SUB, ~ ) \ |
| }; |
| |
| #define MSM_VISITOR_ARGS(z, n, unused) \ |
| template <class RES BOOST_PP_COMMA_IF(n) BOOST_PP_ENUM_PARAMS(n, class ARG)> \ |
| struct args<RES, \ |
| BOOST_PP_ENUM_PARAMS(n,ARG) \ |
| BOOST_PP_COMMA_IF(n) \ |
| BOOST_PP_ENUM(BOOST_PP_SUB(BOOST_MSM_VISITOR_ARG_SIZE,n), MSM_ARGS_PRINT, none) \ |
| > \ |
| { \ |
| typedef ::boost::function<RES(BOOST_PP_ENUM_PARAMS(n, ARG))> type; \ |
| enum {args_number=n}; \ |
| BOOST_PP_REPEAT(n, MSM_ARGS_TYPEDEF_SUB, ~ ) \ |
| }; |
| MSM_VISITOR_MAIN_ARGS(BOOST_MSM_VISITOR_ARG_SIZE) |
| BOOST_PP_REPEAT(BOOST_MSM_VISITOR_ARG_SIZE, MSM_VISITOR_ARGS, ~) |
| |
| #undef MSM_VISITOR_ARGS |
| #undef MSM_ARGS_PRINT |
| |
| }}} |
| |
| #endif //BOOST_MSM_BACK_ARGS_H |
| |