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Переписка с Bjarne Stroustrup
-----------------------------

Смирнов Сергей wrote:

>Good day, Dr. Stroustrup!
>
>----- Original Message -----
>From: "Bjarne Stroustrup" <bs@cs.tamu.edu>
>To: "Смирнов Сергей" <serge@gus.elcom.ru>
>Sent: Wednesday, August 10, 2005 9:20 PM
>Subject: Re: Simple question — Constructing in condition
>
>
>Смирнов Сергей wrote:
>
>
>
>>Good day, Dr. Stroustrup!
>>
>>It is "ok" to use code like following ?
>>
>>if( int ok( GetStatus() ) ) // "int" used as example only (i use object of
>>some class with "operator bool()" there)
>>
>>
>>
>>
>You need to use the = initialization syntax:
>
>if (int ok = GetStatus())
>
>==========================================
>What if = initialization constructor
>(to prevent from copy semantics -
>i read in standard that in case of "=" temporary
>could — though it may be optimized away — be created)
>made private and without definition ?
>
>Will be "if( SomeClass ok( GetStatus() ) )" valid anyway ?
>
>
No. I don't recall the reason for requiring the = syntax, but the
requirement is there. Yes, it means that there are a few things you
can't do, but I have not found that a serious problem.

>// SomeClass::operator bool() is properly defined there
>==========================================
>
>Sincerely yours, Sergey Smirnoff
>
>serge@gus.elcom.ru
>
>P.S. THANK YOU FOR THE BEST LANGUAGE
>
>P.P.S. Can you allow me to place your answers
>together with my questions to "Constructing in condition" topic
>on Russian Software Developer Network Forum ?
>
>Forum URL — http://rsdn.ru/Forum
>
>
>
>
sure.