Re: [boost] Re: Extensible polymorphic pointer

From: Victor A. Wagner, Jr. (vawjr_at_[hidden])
Date: 2002-08-11 04:03:19

I understand, I thought perhaps Phillippe didn't.
At Friday 2002/08/09 11:47, you wrote:
> >>>>> "Victor" == Victor A Wagner, <vawjr_at_[hidden]> writes:
>
>     Victor> At Wednesday 2002/08/07 14:02, you wrote:
>     >> "Philippe A. Bouchard" <philippeb_at_[hidden]> wrote in message
>     >> news:airm8o$u3k$1_at_main.gmane.org...
>     >> > > More comments:
>     >> > >
>     >> > > Your code results in undefined behaviour, since it accesses vector
>     >> > > elements that have not been constructed.  Even though the data 
> type
>     >> > > is POD, accessing vector[i] where i >= vector.size() is not 
> legal C++.
>     >> >
>     >> > Why is it public then?  There's a flaw in their standards therefore.
>     >>
>     >> If I use resize() instead, will it shrink down the allocated block 
> (exactly
>     >> what I don't want) if the new size is smaller than the previous one?
>
>     Victor> from all the books I've read, resize() will NOT shrink a vector
>
>Depends what you mean by "shrink".  The resulting vector should report
>the new size.  Whether memory is actually freed is a different
>question.
>
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Victor A. Wagner Jr.      http://rudbek.com
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