Function trampoline

extlibs/sol3/include/sol/sol.hpp:7471–7473

		template <typename Fx, typename... Args>
		int trampoline(lua_State* L, Fx&& f, Args&&... args) noexcept {
			return f(L, std::forward<Args>(args)...);
		}

		inline int c_trampoline(lua_State* L, lua_CFunction f) noexcept {
			return trampoline(L, f);