eve::invocable_returning Concept Reference

Specifies that the function Op, when called with arguments of types Args..., returns a value convertible to R. More...

#include <eve/concept/invocable.hpp>

Detailed Description

Template Parameters

Op	The function type
R	The expected return type
Args	The arguments types

Concept definition

template<typename Op, typename R, typename... Args>
concept eve::invocable_returning =  requires (Op op, Args&& ... args) {
    { op(std::forward<Args>(args)...) } -> std::convertible_to<R>;
  }