CTypedPtrList::GetPrev
Gets the list element identified by rPosition, then sets rPosition to the POSITION value of the previous entry in the list.
TYPE& GetPrev(
POSITION& rPosition
);
TYPE GetPrev(
POSITION& rPosition
) const;
Parameters
TYPE
Template parameter specifying the type of elements contained in this list.rPosition
A reference to a POSITION value returned by a previous GetPrev or other member function call.
Return Value
If the list is accessed through a pointer to a const CTypedPtrList, then GetPrev returns a pointer of the type specified by the template parameter TYPE. This allows the function to be used only on the right side of an assignment statement and thus protects the list from modification.
If the list is accessed directly or through a pointer to a CTypedPtrList, then GetPrev returns a reference to a pointer of the type specified by the template parameter TYPE. This allows the function to be used on either side of an assignment statement and thus allows the list entries to be modified.
Remarks
You can use GetPrev in a reverse iteration loop if you establish the initial position with a call to GetTailPosition or Find.
You must ensure that your POSITION value represents a valid position in the list. If it is invalid, then the Debug version of the Microsoft Foundation Class Library asserts.
If the retrieved element is the first in the list, then the new value of rPosition is set to NULL.
Requirements
Header: afxtempl.h