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com-ptr-t-extractors.md

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title _com_ptr_t Extractors | Microsoft Docs
ms.custom
ms.date 11/04/2016
ms.technology
cpp-language
ms.topic language-reference
f1_keywords
_com_ptr_t::operatorInterface&
_com_ptr_t::operatorbool
_com_ptr_t::operator->
_com_ptr_t::operator*
dev_langs
C++
helpviewer_keywords
operator Interface& [C++]
* operator [C++], with specific objects
operator& [C++]
operator* [C++]
-> operator [C++], with specific objects
& operator [C++], with specific objects
operator Interface* [C++]
operator * [C++]
operator->
operator bool
extractors, _com_ptr_t class
extractors [C++]
ms.assetid 194b9e0e-123c-49ff-a187-0a7fcd68145a
author mikeblome
ms.author mblome
ms.workload
cplusplus

_com_ptr_t Extractors

Microsoft Specific

Extract the encapsulated COM interface pointer.

Syntax

operator Interface*( ) const throw( );   
operator Interface&( ) const;   
Interface& operator*( ) const;   
Interface* operator->( ) const;   
Interface** operator&( ) throw( );   
operator bool( ) const throw( );

Remarks

  • operator Interface* Returns the encapsulated interface pointer, which may be NULL.

  • operator Interface& Returns a reference to the encapsulated interface pointer, and issues an error if the pointer is NULL.

  • operator* Allows a smart pointer object to act as though it were the actual encapsulated interface when dereferenced.

  • operator-> Allows a smart pointer object to act as though it were the actual encapsulated interface when dereferenced.

  • operator& Releases any encapsulated interface pointer, replacing it with NULL, and returns the address of the encapsulated pointer. This allows the smart pointer to be passed by address to a function that has an out parameter through which it returns an interface pointer.

  • operator bool Allows a smart pointer object to be used in a conditional expression. This operator returns TRUE if the pointer is not NULL.

END Microsoft Specific

See also

_com_ptr_t Class