tinyfsm/examples/api/debugging_switch.cpp at master · jerry520-coder/tinyfsm · GitHub

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#include <tinyfsm.hpp>

#include <iostream>

#include <cassert>

struct Off; // forward declaration

// ----------------------------------------------------------------------------

// Event Declarations

struct Toggle : tinyfsm::Event { }; // Event Declarations

// ----------------------------------------------------------------------------

// State Machine Declaration

struct Switch

: tinyfsm::Fsm<Switch>

{

static void reset(void);

// NOTE: on reset: "tinyfsm::StateList<Off, On>::reset()", copy

// constructor is used by default, so "this" points to neither

// "Off" nor "On" (see operator=() below).

Switch() : counter(0) {

std::cout << "* Switch()" << std::endl

<< " this = " << this << std::endl;

}

~Switch() {

std::cout << "* ~Switch()" << std::endl

<< " this = " << this << std::endl;

}

Switch & operator=(const Switch & other) {

std::cout << "* operator=()" << std::endl

<< " this = " << this << std::endl

<< " other = " << &other << std::endl;

counter = other.counter;

return *this;

}

virtual void react(Toggle const &) { };

void entry(void);

void exit(void);

int counter;

};

struct On : Switch {

void react(Toggle const &) override { transit<Off>(); };

};

struct Off : Switch {

void react(Toggle const &) override { transit<On>(); };

};

FSM_INITIAL_STATE(Switch, Off)

// ----------------------------------------------------------------------------

// State Machine Definitions

void Switch::reset() {

tinyfsm::StateList<Off, On>::reset();

}

void Switch::entry() {

counter++;

// debugging only. properly designed state machines don't need this:

if(is_in_state<On>()) { std::cout << "* On::entry()" << std::endl; }

else if(is_in_state<Off>()) { std::cout << "* Off::entry()" << std::endl; }

else assert(true);

assert(current_state_ptr == this);

std::cout << " this (cur) = " << this << std::endl

<< " state<On> = " << &state<On>() << std::endl

<< " state<Off> = " << &state<Off>() << std::endl;

}

void Switch::exit() {

assert(current_state_ptr == this);

std::cout << "* exit()" << std::endl

<< " this (cur) = " << this << std::endl

<< " state<On> = " << &state<On>() << std::endl

<< " state<Off> = " << &state<Off>() << std::endl;

}

// ----------------------------------------------------------------------------

// Main

int main()

{

Switch::start();

while(1)

{

char c;

std::cout << "* main()" << std::endl

<< " cur_counter = " << Switch::current_state_ptr->counter << std::endl

<< " on_counter = " << Switch::state<On>().counter << std::endl

<< " off_counter = " << Switch::state<Off>().counter << std::endl;

std::cout << std::endl << "t=Toggle, r=Restart, q=Quit ? ";

std::cin >> c;

switch(c) {

case 't':

Switch::dispatch(Toggle());

break;

case 'r':

Switch::reset();

Switch::start();

break;

case 'q':

return 0;

default:

std::cout << "> Invalid input" << std::endl;

};

}

tinyfsm/examples/api/debugging_switch.cpp at master · jerry520-coder/tinyfsm · GitHub

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