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_com_ptr_t Extractors

  • Cikk

Microsoft Specific

Extract the encapsulated COM interface pointer.

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

Reference

_com_ptr_t Class