event.h File Reference

C++20 concepts for event bus types. More...

#include <concepts>
#include <type_traits>
#include <functional>
#include <string>
#include <chrono>

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Namespaces
namespace	kcenon
namespace	kcenon::common
	Core interfaces.
namespace	kcenon::common::concepts
	C++20 concepts for compile-time type validation.

Concepts
concept	kcenon::common::concepts::EventType
	A type that can be used as an event in the event bus.
concept	kcenon::common::concepts::EventHandler
	A callable that can handle events of a specific type.
concept	kcenon::common::concepts::EventFilter
	A callable that filters events based on criteria.
concept	kcenon::common::concepts::TimestampedEvent
	An event type that includes a timestamp.
concept	kcenon::common::concepts::NamedEvent
	An event type that includes a module or source name.
concept	kcenon::common::concepts::ErrorEvent
	An event type representing an error.
concept	kcenon::common::concepts::MetricEvent
	An event type representing a metric measurement.
concept	kcenon::common::concepts::ModuleLifecycleEvent
	An event type representing module lifecycle changes.
concept	kcenon::common::concepts::FullErrorEvent
	A complete error event with module, message, code, and timestamp.
concept	kcenon::common::concepts::FullMetricEvent
	A complete metric event with timestamp.
concept	kcenon::common::concepts::EventBusLike
	A type that satisfies the event bus interface requirements.

Detailed Description

C++20 concepts for event bus types.

This header provides concepts for validating event types, handlers, and filters used in the event bus system. These concepts enable compile-time validation with clear, actionable error messages.

Requirements:

• C++20 compiler with concepts support
• GCC 10+, Clang 10+, MSVC 2022+

Thread Safety:

• Concepts are evaluated at compile-time only.
• No runtime thread-safety considerations apply.

See also

event_bus.h for simple_event_bus implementation

https://en.cppreference.com/w/cpp/language/constraints

Definition in file event.h.