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#pragma once
#include <cstddef>
namespace NYql {
template <typename T>
struct TArity;
template <typename Ret, typename... Args>
struct TArity<Ret(Args...)> {
static constexpr std::size_t value = sizeof...(Args);
};
template <typename Ret, typename... Args>
struct TArity<Ret (*)(Args...)>: TArity<Ret(Args...)> {};
#define METHOD_ARITY(TAIL) \
template <typename Ret, typename Class, typename... Args> \
struct TArity<Ret (Class::*)(Args...) TAIL> { \
static constexpr std::size_t value = 1 + sizeof...(Args); \
};
METHOD_ARITY()
METHOD_ARITY(const)
METHOD_ARITY(volatile)
METHOD_ARITY(const volatile)
METHOD_ARITY(&)
METHOD_ARITY(const&)
METHOD_ARITY(&&)
METHOD_ARITY(const&&)
METHOD_ARITY(noexcept)
METHOD_ARITY(const noexcept)
METHOD_ARITY(volatile noexcept)
METHOD_ARITY(const volatile noexcept)
#undef METHOD_ARITY
}; // namespace NYql
template <typename T>
inline constexpr std::size_t arity_v = NYql::TArity<T>::value;
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