jontitorr / EventEmitter

A strictly-typed, event emitter implementation written in C++ 20.

EventEmitter

A header-only event emitter implementation written in C++ 20.

Usage/Examples

#include "EventEmitter.hpp"

auto diff = [](int a, int b) { std::cout << "a - b = " << a - b << '\n'; };

EventEmitter emitter;
emitter.on("diff", diff);
emitter.emit("diff", 1, 2);

// prints: a - b = -1

API Reference

on("event_name", on_event)

Adds a listener to the emitter, listening for the event specified. Essentially adds the string to the map and adds the functor to a list of functors to run when the event is emitted.

  emitter.on("login_event", on_login);

Parameter	Type	Description
event_name	string_view	Required. The event name to listen for.
callback	Event	Required. The actual callable function to run when at the time of the event.

emit("event_name", args...)

Emits the event to the list of listeners, calling them all with the arguments provided.

  emitter.emit("login_event", user_name, timestamp);

Parameter	Type	Description
event_name	string_view	Required. The event to emit to the list of listeners.
args	Args...	The arguments to pass to the listening functions.