Function make_optional

dlib/optional.h:1003–1006

    template< class T >
    constexpr dlib::optional<std::decay_t<T>> make_optional( T&& value )
    {
        return dlib::optional<std::decay_t<T>>(std::forward<T>(value));
    }

    template< class T, class... Args >
    constexpr dlib::optional<T> make_optional( Args&&... args )