Method is_null

include/curl_form.h:133–137

    // Implementation of utility function to check if a pointer points to null.
    template<typename T> inline void curl_form::is_null(const T *ptr) const {
        if (ptr == nullptr) {
            throw std::bad_alloc();
        }
    }

    // Implementation of getter method that returns the list head.
    inline const struct curl_httppost *curl_form::get() const {