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122 lines
3.1 KiB
122 lines
3.1 KiB
#include <tinyfsm.hpp>
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#include <iostream>
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#include <cassert>
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struct Off; // forward declaration
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// ----------------------------------------------------------------------------
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// Event Declarations
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//
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struct Toggle : tinyfsm::Event { }; // Event Declarations
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// ----------------------------------------------------------------------------
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// State Machine Declaration
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//
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struct Switch
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: tinyfsm::Fsm<Switch>
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{
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static void reset(void);
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// NOTE: on reset: "tinyfsm::StateList<Off, On>::reset()", copy
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// constructor is used by default, so "this" points to neither
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// "Off" nor "On" (see operator=() below).
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Switch() : counter(0) {
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std::cout << "* Switch()" << std::endl
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<< " this = " << this << std::endl;
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}
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~Switch() {
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std::cout << "* ~Switch()" << std::endl
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<< " this = " << this << std::endl;
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}
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Switch & operator=(const Switch & other) {
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std::cout << "* operator=()" << std::endl
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<< " this = " << this << std::endl
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<< " other = " << &other << std::endl;
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counter = other.counter;
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return *this;
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}
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virtual void react(Toggle const &) { };
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void entry(void);
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void exit(void);
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int counter;
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};
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struct On : Switch {
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void react(Toggle const &) override { transit<Off>(); };
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};
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struct Off : Switch {
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void react(Toggle const &) override { transit<On>(); };
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};
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FSM_INITIAL_STATE(Switch, Off)
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// ----------------------------------------------------------------------------
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// State Machine Definitions
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//
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void Switch::reset() {
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tinyfsm::StateList<Off, On>::reset();
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}
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void Switch::entry() {
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counter++;
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// debugging only. properly designed state machines don't need this:
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if(is_in_state<On>()) { std::cout << "* On::entry()" << std::endl; }
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else if(is_in_state<Off>()) { std::cout << "* Off::entry()" << std::endl; }
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else assert(true);
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assert(current_state_ptr == this);
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std::cout << " this (cur) = " << this << std::endl
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<< " state<On> = " << &state<On>() << std::endl
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<< " state<Off> = " << &state<Off>() << std::endl;
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}
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void Switch::exit() {
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assert(current_state_ptr == this);
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std::cout << "* exit()" << std::endl
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<< " this (cur) = " << this << std::endl
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<< " state<On> = " << &state<On>() << std::endl
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<< " state<Off> = " << &state<Off>() << std::endl;
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}
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// ----------------------------------------------------------------------------
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// Main
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//
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int main()
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{
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Switch::start();
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while(1)
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{
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char c;
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std::cout << "* main()" << std::endl
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<< " cur_counter = " << Switch::current_state_ptr->counter << std::endl
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<< " on_counter = " << Switch::state<On>().counter << std::endl
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<< " off_counter = " << Switch::state<Off>().counter << std::endl;
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std::cout << std::endl << "t=Toggle, r=Restart, q=Quit ? ";
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std::cin >> c;
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switch(c) {
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case 't':
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Switch::dispatch(Toggle());
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break;
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case 'r':
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Switch::reset();
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Switch::start();
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break;
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case 'q':
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return 0;
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default:
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std::cout << "> Invalid input" << std::endl;
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};
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}
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}
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