111 lines
2.8 KiB
C++
111 lines
2.8 KiB
C++
#include <tinyfsm.hpp>
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#include <iostream>
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class Off; // forward declaration
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// ----------------------------------------------------------------------------
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// 1. Event Declarations
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//
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struct Toggle : tinyfsm::Event { };
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// ----------------------------------------------------------------------------
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// 2. State Machine Base Class Declaration
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//
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class Switch
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: public tinyfsm::Fsm<Switch>
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{
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// entry(), exit() and react() are called from Fsm<Switch>::transit()
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// in derived states, make friends:
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friend class tinyfsm::Fsm<Switch>;
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/* default reaction for unhandled events */
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void react(tinyfsm::Event const &) { };
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virtual void react(Toggle const &) { };
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virtual void entry(void) { }; /* entry actions in some states */
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void exit(void) { }; /* no exit actions */
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public:
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static void reset(void); /* implemented below */
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};
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// ----------------------------------------------------------------------------
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// 3. State Declarations
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//
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class On
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: public Switch
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{
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void entry() override { counter++; std::cout << "* Switch is ON, counter=" << counter << std::endl; };
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void react(Toggle const &) override { transit<Off>(); };
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int counter;
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public:
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On() : counter(0) { std::cout << "** RESET State=On" << std::endl; }
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};
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class Off
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: public Switch
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{
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void entry() override { counter++; std::cout << "* Switch is OFF, counter=" << counter << std::endl; };
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void react(Toggle const &) override { transit<On>(); };
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int counter;
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public:
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Off() : counter(0) { std::cout << "** RESET State=Off" << std::endl; }
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};
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void Switch::reset() {
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std::cout << "** RESET Switch" << std::endl;
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// Reset all states (calls constructor on all states in list)
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tinyfsm::StateList<Off, On>::reset();
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// Alternatively, make counter public above and reset the values
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// here instead of using a copy-constructor with StateList<>:
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//state<On>().counter = 0;
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//state<Off>().counter = 0;
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}
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FSM_INITIAL_STATE(Switch, Off)
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// ----------------------------------------------------------------------------
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// 4. State Machine List Declaration (dispatches events to multiple FSM's)
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//
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// In this example, we only have a single state machine, no need to use FsmList<>:
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//using fsm_handle = tinyfsm::FsmList< Switch >;
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using fsm_handle = Switch;
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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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fsm_handle::start();
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while(1)
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{
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char c;
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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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std::cout << "> Toggling switch..." << std::endl;
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fsm_handle::dispatch(Toggle());
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break;
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case 'r':
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fsm_handle::reset();
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fsm_handle::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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