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_com_ptr_t Extractors

 

The latest version of this topic can be found at _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