/*
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* Copyright (C) 2020 Christopher J. Howard
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*
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* This file is part of Antkeeper source code.
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*
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* Antkeeper source code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Antkeeper source code is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ANTKEEPER_STATE_MACHINE_HPP
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#define ANTKEEPER_STATE_MACHINE_HPP
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#include <functional>
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namespace fsm {
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/**
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* A finite state machine state consisting of a pair of `enter()` and `exit()` functions.
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*/
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struct state
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{
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std::function<void()> enter;
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std::function<void()> exit;
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};
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/**
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* General purpose finite state machine.
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*/
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class machine
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{
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public:
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machine();
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void change_state(const state& next_state);
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const state& get_previous_state() const;
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const state& get_current_state() const;
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private:
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state previous_state;
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state current_state;
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};
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inline const state& machine::get_previous_state() const
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{
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return previous_state;
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}
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inline const state& machine::get_current_state() const
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{
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return current_state;
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}
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} // namespace fsm
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#endif // ANTKEEPER_STATE_MACHINE_HPP
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