`__RTDynamicCast`

Artikkeli
02/01/2023

Runtime implementation of the dynamic_cast operator.

Syntax

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 subobject 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

Routine	Required header
`__RTDynamicCast`	`<rttidata.h>`

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