projects / ceph.git / blame
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| 7c673cae FG |
1 | // Copyright 2008 Christophe Henry |
| 2 | // henry UNDERSCORE christophe AT hotmail DOT com | |
| 3 | // This is an extended version of the state machine available in the boost::mpl library | |
| 4 | // Distributed under the same license as the original. | |
| 5 | // Copyright for the original version: | |
| 6 | // Copyright 2005 David Abrahams and Aleksey Gurtovoy. Distributed | |
| 7 | // under the Boost Software License, Version 1.0. (See accompanying | |
| 8 | // file LICENSE_1_0.txt or copy at | |
| 9 | // http://www.boost.org/LICENSE_1_0.txt) | |
| 10 | ||
| 11 | #ifndef BOOST_MSM_BACK_ARGS_H | |
| 12 | #define BOOST_MSM_BACK_ARGS_H | |
| 13 | ||
| 14 | #include <boost/preprocessor/repetition/enum_params.hpp> | |
| 15 | #include <boost/preprocessor/arithmetic/sub.hpp> | |
| 16 | #include <boost/preprocessor/punctuation/comma_if.hpp> | |
| 17 | #include <boost/preprocessor/control/expr_if.hpp> | |
| 18 | #include <boost/preprocessor/punctuation/comma.hpp> | |
| 19 | #include <boost/preprocessor/arithmetic/add.hpp> | |
| 20 | #include <boost/preprocessor/cat.hpp> | |
| 21 | #include <boost/preprocessor/comparison/less.hpp> | |
| 22 | #include <boost/preprocessor/arithmetic/dec.hpp> | |
| 23 | #include <boost/function.hpp> | |
| 24 | ||
| 25 | #ifndef BOOST_MSM_VISITOR_ARG_SIZE | |
| 26 | #define BOOST_MSM_VISITOR_ARG_SIZE 2 // default max number of arguments | |
| 27 | #endif | |
| 28 | ||
| 29 | namespace boost { namespace msm { namespace back | |
| 30 | { | |
| 31 | struct no_args {}; | |
| 32 | #define MSM_ARGS_TYPEDEF_SUB(z, n, unused) typedef ARG ## n argument ## n ; | |
| 33 | #define MSM_ARGS_PRINT(z, n, data) data | |
| 34 | #define MSM_ARGS_NONE_PRINT(z, n, data) class data ## n = no_args \ | |
| 35 | BOOST_PP_COMMA_IF( BOOST_PP_LESS(n, BOOST_PP_DEC(BOOST_MSM_VISITOR_ARG_SIZE) ) ) | |
| 36 | ||
| 37 | #define MSM_VISITOR_MAIN_ARGS(n) \ | |
| 38 | template <class RES, \ | |
| 39 | BOOST_PP_REPEAT(BOOST_MSM_VISITOR_ARG_SIZE, MSM_ARGS_NONE_PRINT, ARG)> \ | |
| 40 | struct args \ | |
| 41 | { \ | |
| 42 | typedef ::boost::function<RES(BOOST_PP_ENUM_PARAMS(n, ARG))> type; \ | |
| 43 | enum {args_number=n}; \ | |
| 44 | BOOST_PP_REPEAT(n, MSM_ARGS_TYPEDEF_SUB, ~ ) \ | |
| 45 | }; | |
| 46 | ||
| 47 | #define MSM_VISITOR_ARGS(z, n, unused) \ | |
| 48 | template <class RES BOOST_PP_COMMA_IF(n) BOOST_PP_ENUM_PARAMS(n, class ARG)> \ | |
| 49 | struct args<RES, \ | |
| 50 | BOOST_PP_ENUM_PARAMS(n,ARG) \ | |
| 51 | BOOST_PP_COMMA_IF(n) \ | |
| 52 | BOOST_PP_ENUM(BOOST_PP_SUB(BOOST_MSM_VISITOR_ARG_SIZE,n), MSM_ARGS_PRINT, no_args) \ | |
| 53 | > \ | |
| 54 | { \ | |
| 55 | typedef ::boost::function<RES(BOOST_PP_ENUM_PARAMS(n, ARG))> type; \ | |
| 56 | enum {args_number=n}; \ | |
| 57 | BOOST_PP_REPEAT(n, MSM_ARGS_TYPEDEF_SUB, ~ ) \ | |
| 58 | }; | |
| 59 | MSM_VISITOR_MAIN_ARGS(BOOST_MSM_VISITOR_ARG_SIZE) | |
| 60 | BOOST_PP_REPEAT(BOOST_MSM_VISITOR_ARG_SIZE, MSM_VISITOR_ARGS, ~) | |
| 61 | ||
| 62 | #undef MSM_VISITOR_ARGS | |
| 63 | #undef MSM_ARGS_PRINT | |
| 64 | ||
| 65 | }}} | |
| 66 | ||
| 67 | #endif //BOOST_MSM_BACK_ARGS_H | |
| 68 |