// 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 | |