idfxx::event< IdEnum, DataType > Struct Template Reference

A typed event that pairs an event ID with its data type. More...

Public Attributes
IdEnum	id
	The event ID.

Detailed Description

template<typename IdEnum, typename DataType = void>
requires (std::is_void_v<DataType> || receivable_event_data<DataType>)
struct idfxx::event< IdEnum, DataType >

A typed event that pairs an event ID with its data type.

Used to register type-safe event listeners where the callback receives the correct data type directly, rather than a raw void pointer. The event base is looked up automatically from the enum type via ADL (see IDFXX_EVENT_DEFINE_BASE).

Warning

Only one event should be defined per enum value. Defining multiple events with the same ID but different data types is not detected at compile time and will result in undefined behavior (the listener will attempt to reconstruct the wrong type from the event data).

Template Parameters

IdEnum	The event ID enum type.
DataType	The event data type (must satisfy receivable_event_data), or void for events without data.

// Define typed events
inline constexpr event<my_event, my_data> data_event{my_event::with_data};
inline constexpr event<my_event> simple_event{my_event::no_data};
 
// Register type-safe listeners
loop.listener_add(data_event, [](const my_data& d) { ... });
loop.listener_add(simple_event, []() { ... });

Definition at line 195 of file event.hpp.

Member Data Documentation

id

template<typename IdEnum , typename DataType = void>

IdEnum idfxx::event< IdEnum, DataType >::id

The event ID.

Definition at line 199 of file event.hpp.

Referenced by idfxx::event_loop::try_listener_add().

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The documentation for this struct was generated from the following file:

• idfxx_event/include/idfxx/event.hpp