__RTDynamicCast

Runtime implementation of the dynamic_cast operator.

PVOID __RTDynamicCast (
   PVOID inptr, 
   LONG VfDelta,
   PVOID SrcType,
   PVOID TargetType, 
   BOOL isReference
   ) throw(...)

Parameters

• inptr
  Pointer to a polymorphic object.

• VfDelta
  Offset of virtual function pointer in object.

• SrcType
  Static type of object pointed to by the inptr parameter.

• TargetType
  Intended result of cast.

• isReference
  true if input is a reference; false if input is a pointer.

Return Value

Pointer to the appropriate sub-object, if successful; otherwise, NULL.

Exceptions

bad_cast() if the input to dynamic_cast<> is a reference and the cast fails.

Remarks

Converts inptr to an object of type TargetType. The type of inptr must be a pointer if TargetType is a pointer, or an l-value if TargetType is a reference. TargetType must be a pointer or a reference to a previously defined class type, or a pointer to void.

Requirements