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Added function_traits.

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Patrick 2025-07-16 21:07:01 +02:00
parent ba6ffa6c42
commit 93ef90aeb8
1 changed files with 36 additions and 0 deletions
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36
source/mijin/util/traits.hpp
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@ -253,6 +253,42 @@ struct optional_base<T, false>
template<typename T, bool enable> template<typename T, bool enable>
using optional_base_t = optional_base<T, enable>::type; using optional_base_t = optional_base<T, enable>::type;
namespace impl
{
template<typename TFunc>
struct function_traits_base {};
template<typename TResult, typename... TParams>
struct function_traits_base<TResult (*)(TParams...)>
{
using result_t = TResult;
using params_t = std::tuple<TParams...>;
};
template<typename TResult, typename TType, typename... TParams>
struct function_traits_base<TResult (TType::*)(TParams...)>
{
using result_t = TResult;
using params_t = std::tuple<TType*, TParams...>;
};
template<typename TResult, typename TType, typename... TParams>
struct function_traits_base<TResult (TType::*)(TParams...) const>
{
using result_t = TResult;
using params_t = std::tuple<const TType*, TParams...>;
};
}
template<typename TFunc>
struct function_traits : impl::function_traits_base<TFunc>
{
static constexpr std::size_t NUM_PARAMS = std::tuple_size_v<typename impl::function_traits_base<TFunc>::params_t>;
template<std::size_t pos>
using param_t = std::tuple_element_t<pos, typename impl::function_traits_base<TFunc>::params_t>;
};
// //
// public functions // public functions
// //