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
14namespace boost { namespace msm
15{
16// policy classes
17
18// Default: new active state set after the transition (after entry)
19struct 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
28struct 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
37struct 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
46struct 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
56

source code of boost/libs/msm/include/boost/msm/active_state_switching_policies.hpp