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add generic function helpers

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HJfod 2024-08-31 21:35:41 +03:00
parent db9e2ccb48
commit 659c168a14
1 changed files with 59 additions and 0 deletions
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59
loader/include/Geode/utils/function.hpp Normal file
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#pragma once
#include <tuple>
namespace geode::utils::function {
namespace detail {
template <class F>
struct ImplExtract;
template <class R, class... A>
struct ImplExtract<R(A...)> {
using Type = R(A...);
using Return = R;
using Args = std::tuple<A...>;
static constexpr std::size_t ARG_COUNT = std::tuple_size_v<Args>;
};
template <class R, class... A>
struct ImplExtract<R(*)(A...)> {
using Type = R(A...);
using Return = R;
using Args = std::tuple<A...>;
static constexpr std::size_t ARG_COUNT = std::tuple_size_v<Args>;
};
template <class R, class C, class... A>
struct ImplExtract<R(C::*)(A...)> {
using Type = R(A...);
using Class = C;
using Return = R;
using Args = std::tuple<A...>;
static constexpr std::size_t ARG_COUNT = std::tuple_size_v<Args>;
};
template <class R, class C, class... A>
struct ImplExtract<R(C::*)(A...) const> {
using Type = R(A...);
using Class = C;
using Return = R;
using Args = std::tuple<A...>;
static constexpr std::size_t ARG_COUNT = std::tuple_size_v<Args>;
};
template <class F>
requires requires { &F::operator(); }
struct ImplExtract<F> : public ImplExtract<decltype(&F::operator())> {};
template <class F>
using Extract = ImplExtract<std::remove_cvref_t<F>>;
}
template <class F>
using FunctionInfo = detail::Extract<F>;
template <class F>
using Return = typename detail::Extract<F>::Return;
template <class F>
using Args = typename detail::Extract<F>::Args;
template <std::size_t Ix, class F>
using Arg = std::tuple_element_t<Ix, typename detail::Extract<F>::Args>;
}