86 lines
2.1 KiB
C++
86 lines
2.1 KiB
C++
#include <tinyfsm.hpp>
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#include <iostream>
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struct 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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struct Switch : tinyfsm::Fsm<Switch>
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{
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virtual void react(Toggle const &) { };
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// alternative: enforce handling of Toggle in all states (pure virtual)
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//virtual void react(Toggle const &) = 0;
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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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// alternative: enforce entry actions in all states (pure virtual)
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//virtual void entry(void) = 0;
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};
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// ----------------------------------------------------------------------------
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// 3. State Declarations
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//
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struct On : Switch
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{
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void entry() override { std::cout << "* Switch is ON" << std::endl; };
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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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{
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void entry() override { std::cout << "* Switch is OFF" << std::endl; };
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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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// 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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// instantiate events
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Toggle toggle;
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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, 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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// alternative: instantiating causes no overhead (empty declaration)
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//fsm_handle::dispatch(Toggle());
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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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