callable.h File Reference

C++20 concepts for callable types and executor interfaces. More...

#include <concepts>
#include <type_traits>
#include <functional>
#include <string>
#include <future>
#include <memory>
#include <chrono>
#include "../patterns/result/core.h"

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

Concepts
concept	kcenon::common::concepts::Invocable
	A callable type that can be invoked with given arguments.
concept	kcenon::common::concepts::VoidCallable
	A callable type that returns void when invoked.
concept	kcenon::common::concepts::ReturnsResult
	A callable type that returns a value convertible to the specified type.
concept	kcenon::common::concepts::NoexceptCallable
	A callable type that is marked noexcept.
concept	kcenon::common::concepts::Predicate
	A callable type that returns a boolean value.
concept	kcenon::common::concepts::UnaryFunction
	A callable type that takes a single argument.
concept	kcenon::common::concepts::BinaryFunction
	A callable type that takes two arguments.
concept	kcenon::common::concepts::JobLike
	A type that satisfies the Job interface requirements.
concept	kcenon::common::concepts::ExecutorLike
	A type that satisfies the Executor interface requirements.
concept	kcenon::common::concepts::TaskFactory
	A callable that creates a job or task.
concept	kcenon::common::concepts::AsyncCallable
	A callable suitable for async execution returning a future.
concept	kcenon::common::concepts::DelayedCallable
	A callable suitable for delayed execution.

Detailed Description

C++20 concepts for callable types and executor interfaces.

This header provides concepts for validating callable types used in task execution, job scheduling, and async operations. These concepts replace SFINAE-based constraints with clearer compile-time errors.

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

executor_interface.h for IExecutor implementation

https://en.cppreference.com/w/cpp/concepts/invocable

Definition in file callable.h.