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// Copyright (c) 2013-2020 Vittorio Romeo
// License: Academic Free License ("AFL") v. 3.0
// AFL License page: https://opensource.org/licenses/AFL-3.0
#pragma once
#include <cstddef>
#include <tuple>
namespace hg::Utils {
template <typename>
struct ArgExtractor;
template <typename R, typename F, typename... Args>
struct ArgExtractor<R (F::*)(Args...)>
{
using Return = R;
using Function = F;
inline static constexpr std::size_t numArgs = sizeof...(Args);
template <std::size_t I>
using NthArg = std::tuple_element_t<I, std::tuple<Args...>>;
};
template <typename R, typename F, typename... Args>
struct ArgExtractor<R (F::*)(Args...) const>
{
using Return = R;
using Function = F;
inline static constexpr std::size_t numArgs = sizeof...(Args);
template <std::size_t I>
using NthArg = std::tuple_element_t<I, std::tuple<Args...>>;
};
} // namespace hg::Utils
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