forked from boostorg/mpl
48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
//-----------------------------------------------------------------------------
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// boost fsm/state.hpp header file
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// See http://www.boost.org for updates, documentation, and revision history.
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//-----------------------------------------------------------------------------
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//
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// Copyright (c) 2002
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// Aleksey Gurtovoy
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//
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// Permission to use, copy, modify, distribute and sell this software
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// and its documentation for any purpose is hereby granted without fee,
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// provided that the above copyright notice appears in all copies and
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// that both the copyright notice and this permission notice appear in
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// supporting documentation. No representations are made about the
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// suitability of this software for any purpose. It is provided "as is"
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// without express or implied warranty.
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#ifndef BOOST_FSM_STATE_INCLUDED
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#define BOOST_FSM_STATE_INCLUDED
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#include "boost/mpl/integral_c.hpp"
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namespace fsm {
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namespace aux {
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namespace mpl = boost::mpl;
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// represent a FSM state
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template<
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typename T
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, long State
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, void (T::* invariant_func)() const
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>
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struct state
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: mpl::integral_c<long,State>
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{
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static long do_check_invariant(T const& x)
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{
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if (invariant_func) (x.*invariant_func)();
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return State;
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}
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};
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} // namespace aux
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} // namespace fsm
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#endif // BOOST_FSM_STATE_INCLUDED
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