helios::ecs::EventTrait Concept Reference

Concept for valid event types. More...

#include <event.hpp>

Concept definition

template<typename T>
concept helios::ecs::EventTrait =  std::move_constructible<T> && std::is_move_assignable_v<T> && std::is_trivially_copyable_v<T>

Detailed Description

Concept for valid event types.

A valid event must be:

• Move constructible
• Move assignable
• Trivially copyable (required for safe storage in byte buffers)

Note

Events are stored as raw bytes using memcpy, so they must be trivially copyable. This means events cannot contain:

• std::string, std::vector, or other types with dynamic allocation
• Virtual functions
• User-defined copy/move constructors/assignment operators

Use fixed-size arrays (e.g., char[N]) instead of dynamic containers.

Definition at line 44 of file event.hpp.