concept Receives

The Receives<T> concept holds all the requirements for a receiver that can receive a T value (or none, when T is void).

Prototype

template<typename T, typename Receives>
concept Receives = ...;

Requirements

A set_value member which can be called with a T&& value, or no parameters, if T is void.

Examples

struct discard_receiver {
	template<typename T>
	void set_value(T) {
		assert(std::is_constant_evaluated());
	}
	void set_value() {
		assert(std::is_constant_evaluated());
	}
};
static_assert(async::Receives<discard_receiver, void>);
static_assert(async::Receives<discard_receiver, int>);
static_assert(async::Receives<discard_receiver, std::string>);