FunctionTraits.hpp

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#pragma once
 
#include <AH/STL/cstddef>
#include <AH/STL/tuple>
 
#include <AH/Settings/NamespaceSettings.hpp>
 
BEGIN_AH_NAMESPACE
 
template <class T>
struct function_traits;
 
template <class Return, class... Args>
struct function_traits<Return(Args...)> {
    static constexpr size_t number_arguments = sizeof...(Args);
 
    using return_t = Return;
    template <size_t Index>
    struct argument {
        using type =
            typename std::tuple_element<Index, std::tuple<Args...>>::type;
    };
 
    template <size_t Index>
    using argument_t = typename argument<Index>::type;
};
 
END_AH_NAMESPACE