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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_ACTIVE_STATE_SWITCHING_POLICIES_H | |
12 | #define BOOST_MSM_ACTIVE_STATE_SWITCHING_POLICIES_H | |
13 | ||
14 | namespace boost { namespace msm | |
15 | { | |
16 | // policy classes | |
17 | ||
18 | // Default: new active state set after the transition (after entry) | |
19 | struct active_state_switch_after_entry | |
20 | { | |
21 | static int after_guard(int current_state,int){return current_state;} | |
22 | static int after_exit(int current_state,int){return current_state;} | |
23 | static int after_action(int current_state,int){return current_state;} | |
24 | static int after_entry(int,int next_state){return next_state;} | |
25 | }; | |
26 | ||
27 | // new state set before the transition starts | |
28 | struct active_state_switch_before_transition | |
29 | { | |
30 | static int after_guard(int,int next_state){return next_state;} | |
31 | static int after_exit(int,int next_state){return next_state;} | |
32 | static int after_action(int,int next_state){return next_state;} | |
33 | static int after_entry(int,int next_state){return next_state;} | |
34 | }; | |
35 | ||
36 | // new state set after exit action completed | |
37 | struct active_state_switch_after_exit | |
38 | { | |
39 | static int after_guard(int current_state,int){return current_state;} | |
40 | static int after_exit(int,int next_state){return next_state;} | |
41 | static int after_action(int,int next_state){return next_state;} | |
42 | static int after_entry(int,int next_state){return next_state;} | |
43 | }; | |
44 | ||
45 | // new state set after transition action completed | |
46 | struct active_state_switch_after_transition_action | |
47 | { | |
48 | static int after_guard(int current_state,int){return current_state;} | |
49 | static int after_exit(int current_state,int){return current_state;} | |
50 | static int after_action(int,int next_state){return next_state;} | |
51 | static int after_entry(int,int next_state){return next_state;} | |
52 | }; | |
53 | ||
54 | } }//boost::msm | |
55 | #endif //BOOST_MSM_ACTIVE_STATE_SWITCHING_POLICIES_H |