| OpenCV 4.3.0 Open Source Computer Vision

Classes | Namespaces | Functions
optional.hpp File Reference
`#include <opencv2/gapi/util/variant.hpp>`

## Classes
class | cv::util::bad_optional_access
class | cv::util::optional< T >

## Namespaces
| cv
| "black box" representation of the file storage associated with a file on disk.
| cv::util

## Functions
template<class T >
optional< typename std::decay< T >::type > | cv::util::make_optional (T &&value)