Re: [boost] Re: in/out parameters, codingstylesandmaintenance

From: Rene Rivera (grafik666_at_[hidden])
Date: 2003-05-04 00:52:50

[2003-05-04] Noel Yap wrote:

>Rene Rivera wrote:
>> But I know of at least one need for "out" parameters:
>> 
>>     An asynchronous call that needs to "return" results. But because it's
>> asynch it can't return it as the result of the call.
>
>Good point.  OTOH, can't this be considered an in/out parameter since
>the caller must own the object being set?

Yes, but that's the same as saying that you can consider an in parameter an
in/out parameter, for the same reason ;-)

The called function has no interest in the previous value of the out
parameter, if any. And that's what makes it an out parameter, not the
ownership.

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