type_names.cpp

#include <string_view>
#include <iostream>

template<typename T> struct name_of_
{
	static constexpr auto value() noexcept
	{
#if defined(_MSC_VER )
		std::string_view data(__FUNCSIG__);
		auto i = data.find('<') + 1,
			j = data.find(">::value");
		return data.substr(i, j - i);
#else
		std::string_view data(__PRETTY_FUNCTION__);
		auto i = data.find('=') + 2,
			j = data.find_last_of(']');
		return data.substr(i, j - i);
#endif
	}
};

template<typename T>
inline constexpr auto const name_of = name_of_<T>::value();

int main()
{
	auto x = name_of<std::string>;
	std::cout << x << "\n";
}