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#pragma once
#include "typetraits.h"
#include "typelist.h"
#include <functional>
namespace NPrivate {
template <class F>
struct TRemoveClassImpl {
using TSignature = F;
};
#define Y_EMPTY_REF_QUALIFIER
#define Y_FOR_EACH_REF_QUALIFIERS_COMBINATION(XX) \
XX(Y_EMPTY_REF_QUALIFIER) \
XX(&) \
XX(&&) \
XX(const) \
XX(const&) \
XX(const&&)
#define Y_DECLARE_REMOVE_CLASS_IMPL(qualifiers) \
template <typename C, typename R, typename... Args> \
struct TRemoveClassImpl<R (C::*)(Args...) qualifiers> { \
typedef R TSignature(Args...); \
};
Y_FOR_EACH_REF_QUALIFIERS_COMBINATION(Y_DECLARE_REMOVE_CLASS_IMPL)
#undef Y_DECLARE_REMOVE_CLASS_IMPL
template <class T>
struct TRemoveNoExceptImpl {
using Type = T;
};
template <typename R, typename... Args>
struct TRemoveNoExceptImpl<R(Args...) noexcept> {
using Type = R(Args...);
};
#define Y_DECLARE_REMOVE_NOEXCEPT_IMPL(qualifiers) \
template <typename R, typename C, typename... Args> \
struct TRemoveNoExceptImpl<R (C::*)(Args...) qualifiers noexcept> { \
using Type = R (C::*)(Args...); \
};
Y_FOR_EACH_REF_QUALIFIERS_COMBINATION(Y_DECLARE_REMOVE_NOEXCEPT_IMPL)
#undef Y_DECLARE_REMOVE_NOEXCEPT_IMPL
#undef Y_FOR_EACH_REF_QUALIFIERS_COMBINATION
#undef Y_EMPTY_REF_QUALIFIER
template <class T>
using TRemoveNoExcept = typename TRemoveNoExceptImpl<T>::Type;
template <class F>
using TRemoveClass = typename TRemoveClassImpl<TRemoveNoExcept<F>>::TSignature;
template <class C>
struct TFuncInfo {
using TSignature = TRemoveClass<decltype(&C::operator())>;
};
template <class R, typename... Args>
struct TFuncInfo<R(Args...)> {
using TResult = R;
typedef R TSignature(Args...);
};
}
template <class C>
using TFunctionSignature = typename ::NPrivate::TFuncInfo<::NPrivate::TRemoveClass<std::remove_reference_t<std::remove_pointer_t<C>>>>::TSignature;
template <typename F>
struct TCallableTraits: public TCallableTraits<TFunctionSignature<F>> {
};
template <typename R, typename... Args>
struct TCallableTraits<R(Args...)> {
using TResult = R;
using TArgs = TTypeList<Args...>;
typedef R TSignature(Args...);
};
template <typename C>
using TFunctionResult = typename TCallableTraits<C>::TResult;
template <typename C>
using TFunctionArgs = typename TCallableTraits<C>::TArgs;
template <typename C, size_t N>
struct TFunctionArgImpl {
using TArgs = TFunctionArgs<C>;
using TResult = typename TArgs::template TGet<N>;
};
template <typename C, size_t N>
using TFunctionArg = typename TFunctionArgImpl<C, N>::TResult;
// temporary before std::apply appearance
template <typename F, typename Tuple>
constexpr decltype(auto) Apply(F&& f, Tuple&& t) {
return std::apply(std::forward<F>(f), std::forward<Tuple>(t));
}
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