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68 lines
3.5 KiB
68 lines
3.5 KiB
// Copyright 2008 Christophe Henry |
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// henry UNDERSCORE christophe AT hotmail DOT com |
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// This is an extended version of the state machine available in the boost::mpl library |
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// Distributed under the same license as the original. |
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// Copyright for the original version: |
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// Copyright 2005 David Abrahams and Aleksey Gurtovoy. Distributed |
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// under the Boost Software License, Version 1.0. (See accompanying |
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// file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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#ifndef BOOST_MSM_BACK_ARGS_H |
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#define BOOST_MSM_BACK_ARGS_H |
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#include <boost/preprocessor/repetition/enum_params.hpp> |
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#include <boost/preprocessor/arithmetic/sub.hpp> |
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#include <boost/preprocessor/punctuation/comma_if.hpp> |
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#include <boost/preprocessor/control/expr_if.hpp> |
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#include <boost/preprocessor/punctuation/comma.hpp> |
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#include <boost/preprocessor/arithmetic/add.hpp> |
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#include <boost/preprocessor/cat.hpp> |
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#include <boost/preprocessor/comparison/less.hpp> |
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#include <boost/preprocessor/arithmetic/dec.hpp> |
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#include <boost/function.hpp> |
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#ifndef BOOST_MSM_VISITOR_ARG_SIZE |
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#define BOOST_MSM_VISITOR_ARG_SIZE 2 // default max number of arguments |
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#endif |
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namespace boost { namespace msm { namespace back |
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{ |
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struct no_args {}; |
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#define MSM_ARGS_TYPEDEF_SUB(z, n, unused) typedef ARG ## n argument ## n ; |
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#define MSM_ARGS_PRINT(z, n, data) data |
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#define MSM_ARGS_NONE_PRINT(z, n, data) class data ## n = no_args \ |
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BOOST_PP_COMMA_IF( BOOST_PP_LESS(n, BOOST_PP_DEC(BOOST_MSM_VISITOR_ARG_SIZE) ) ) |
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#define MSM_VISITOR_MAIN_ARGS(n) \ |
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template <class RES, \ |
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BOOST_PP_REPEAT(BOOST_MSM_VISITOR_ARG_SIZE, MSM_ARGS_NONE_PRINT, ARG)> \ |
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struct args \ |
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{ \ |
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typedef ::boost::function<RES(BOOST_PP_ENUM_PARAMS(n, ARG))> type; \ |
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enum {args_number=n}; \ |
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BOOST_PP_REPEAT(n, MSM_ARGS_TYPEDEF_SUB, ~ ) \ |
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}; |
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#define MSM_VISITOR_ARGS(z, n, unused) \ |
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template <class RES BOOST_PP_COMMA_IF(n) BOOST_PP_ENUM_PARAMS(n, class ARG)> \ |
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struct args<RES, \ |
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BOOST_PP_ENUM_PARAMS(n,ARG) \ |
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BOOST_PP_COMMA_IF(n) \ |
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BOOST_PP_ENUM(BOOST_PP_SUB(BOOST_MSM_VISITOR_ARG_SIZE,n), MSM_ARGS_PRINT, no_args) \ |
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> \ |
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{ \ |
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typedef ::boost::function<RES(BOOST_PP_ENUM_PARAMS(n, ARG))> type; \ |
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enum {args_number=n}; \ |
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BOOST_PP_REPEAT(n, MSM_ARGS_TYPEDEF_SUB, ~ ) \ |
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}; |
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MSM_VISITOR_MAIN_ARGS(BOOST_MSM_VISITOR_ARG_SIZE) |
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BOOST_PP_REPEAT(BOOST_MSM_VISITOR_ARG_SIZE, MSM_VISITOR_ARGS, ~) |
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#undef MSM_VISITOR_ARGS |
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#undef MSM_ARGS_PRINT |
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}}} |
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#endif //BOOST_MSM_BACK_ARGS_H |
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