[boost] Re: Perfect Forwarding (almost)

From: David Abrahams (dave_at_[hidden])
Date: 2004-02-10 11:54:52

"Rani Sharoni" <rani_sharoni_at_[hidden]> writes:

> David Abrahams wrote:
>> I think the actual problem is one of either interpretation of 8.5.3/5
>> or overspecification in that very paragraph.  If, instead of saying,
>>
>>    "A temporary of type ``cv1 T2'' [sic] is created, and a constructor
>>    is called to copy the entire rvalue object into the temporary. The
>>    reference is bound to the temporary or to a sub-object within the
>>    temporary"
>>
>> It said:
>>
>>    "A temporary of type ``cv1 T2'' [sic] is constructed using direct
>>    initialization from the rvalue object. The reference is bound to
>>    the temporary or to a sub-object within the temporary"
>>
>> we'd be home free.
>
> I'm not sure.
> When source and destinations un-cv types are the same or base/derived direct
> initialization and copy initialization are the same (per 8.5/14/4/2) and
> this fact was (viciously) exploited by the old auto_ptr.

Something's missing from that sentence to make it comprehensible.

It has the same grammatical structure as "When my hand is blue or my
hair is green and I was a fool", which is not a complete sentence.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com