Re: container design (Was: std::complex design (Was: N-Dimensional array))

From: rwgk (rwgk_at_[hidden])
Date: 2002-03-08 15:17:02

--- In boost_at_y..., "Peter Dimov" <pdimov_at_m...> wrote:
> Why would anyone want an uninitialized vector? One legitimate 
reason is that
> you have an existing C-style library function 'f' that will 
initialize it.

Of course purely for performance reasons.

> I don't see how the iterator interface can be used to achieve the 
same
> effect. If the current vector interface is enough, why all this 
talk about
> uninitialized values?

Consider

std::vector<double> > vec(10000000);
// here is an algorithm that fills vec with the result of
// some complex algorithm.

Doesn't it seem glaringly stupid that there is no way
of avoiding the initialization?

Ralf