| OpenCV 4.3.0 Open Source Computer Vision

Classes | Namespaces | Macros
traits.hpp File Reference
`#include "opencv2/core/cvdef.h"`

## Classes
class | cv::DataDepth< _Tp >
| A helper class for cv::DataType. More...
class | cv::DataType< _Tp >
| Template "trait" class for OpenCV primitive data types. More...

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

## Macros
#define | CV_CREATE_MEMBER_CHECK(X)

## Macro Definition Documentation

## ◆ CV_CREATE_MEMBER_CHECK

#define CV_CREATE_MEMBER_CHECK | ( |  | X | ) |

Value:
template<typename T> class CheckMember_##X { \
struct Fallback { int X; }; \
struct Derived : T, Fallback { }; \
template<typename U, U> struct Check; \
typedef char CV_NO[1]; \
typedef char CV_YES[2]; \
template<typename U> static CV_NO & func(Check<int Fallback::*, &U::X> *); \
template<typename U> static CV_YES & func(...); \
public: \
typedef CheckMember_##X type; \
enum { value = sizeof(func<Derived>(0)) == sizeof(CV_YES) }; \
};