CDefaultCompareTraits Class
This class provides default element comparison functions.
Syntax
template<typename T>
class CDefaultCompareTraits
Parameters
T
The type of data to be stored in the collection.
Members
Public Methods
| Name | Description |
|---|---|
| CDefaultCompareTraits::CompareElements | (Static) Call this function to compare two elements for equality. |
| CDefaultCompareTraits::CompareElementsOrdered | (Static) Call this function to determine the greater and lesser element. |
Remarks
This class contains two static functions for comparing elements stored in a collection class object. This class is utilized by the CDefaultElementTraits Class.
For more information, see ATL Collection Classes.
Requirements
Header: atlcoll.h
CDefaultCompareTraits::CompareElements
Call this function to compare two elements for equality.
static bool CompareElements(const T& element1, const T& element2);
Parameters
element1
The first element.
element2
The second element.
Return Value
Returns true if the elements are equal, false otherwise.
Remarks
The default implementation of this function is the equality (==) operator. For objects other than simple data types, this function may need to be overridden.
CDefaultCompareTraits::CompareElementsOrdered
Call this function to determine the greater and lesser element.
static int CompareElementsOrdered(const T& element1, const T& element2);
Parameters
element1
The first element.
element2
The second element.
Return Value
Returns an integer based on the following table:
| Condition | Return value |
|---|---|
| element1 < element2 | <0 |
| element1 == element2 | 0 |
| element1 > element2 | >0 |
Remarks
The default implementation of this function uses the ==, <, and > operators. For objects other than simple data types, this function may need to be overridden.