Re: [boost] Why no non-null smart pointers?

Subject: Re: [boost] Why no non-null smart pointers?
From: Jeff Hill (johill_at_[hidden])
Date: 2014-04-28 13:42:09

Maybe there /is/ even a backwards compatible solution. 

Perhaps an optional null object pattern could be employed in methods, and or
constructors, of shared_ptr that might establish a raw nill state? Perhaps
something like this obviously oversimplified example could be use.

template < typename T>
void shared_ptr < T > :: reset ( T * p = 0 )
{
    if ( p ) {
          /* what happens in shared_ptr now */
    }
    else {
        /* new behavior in shared_ptr, when it detects a nill raw pointer */
        *this = NullObjectTypes < T > :: factory ();
    }
}

Jeff

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