Re: [boost] Re: move_ptr

From: Beman Dawes (bdawes_at_[hidden])
Date: 2004-01-21 14:53:16

At 10:05 PM 1/20/2004, Howard Hinnant wrote:

 >That is, smart pointers to arrays of objects should not respect
 >dervied-to-base conversions because the language does not do so for raw
 >pointers.
 >
 >Therefore an interface should not imply that you can handle arrays of
 >objects by simply customizing the deletion policy.  Smart pointers to
 >arrays of objects require a different interface, including:
 >
 >*  no dervied-to-base conversions
 >*  no operator*()
 >*  no operator->()
 >*  operator[](size_t)

Yeah, that's been my point about some of the policy-based SP designs; 
polices have to be able to change both behavior and interface. If the 
interface is fixed, some otherwise useful policies can't be expressed 
properly.

 >...
 >
 >move_ptr<T>
 >move_ptr<T[]>
 >
 >...
 >
 >I guess the basic point I'm trying to make (and none to elegantly) ...

You convinced me! The docs would have to be careful to get the word out 
that T[] is required for arrays.

--Beman