Re: [Boost-users] [smart_ptr] weak_ptr / shared_ptr interaction

Subject: Re: [Boost-users] [smart_ptr] weak_ptr / shared_ptr interaction
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2009-07-03 12:38:23

AMDG

Alexander Heinrich wrote:
>> Both s1 and s2 should now have use_count of 2 at this point, since there
>> are 2 shared_ptrs sharing ownership of the same pointee.
>>
>> The post-condition expression is correct; the value of r.use_count()
>> was changed by the construction of the new shared_ptr.
>>     
>
> Thanks for your reply. So you're saying that the behavior of shared_ptr is
> correct (perfectly fine with me). But then I have to say, that the
> documentation of shared_ptr located under
> http://www.boost.org/doc/libs/1_39_0/libs/smart_ptr/shared_ptr.htm#constructors
> is wrong, because it says that if you construct a shared_ptr from a weak_ptr
> (!) the use_count will *not* change.
>   

The documentation does not say that the use count doesn't change.
It says that |use_count() == r.use_count(), which is true.|

In Christ,
Steven Watanabe