Subject: Re: [boost] Interest in StaticVector - fixed capacity vector
From: Peter Dimov (pdimov_at_[hidden])
Date: 2011-10-15 19:47:20
Nathan Ridge wrote:
> > > 1) As a variant of [std|boost]::array where not all the elements
> > > are
> > > constructed/used at the same time, and which keeps track of
> > > how many elements are currently in use.
> > Can you please give some examples of such use?
> For starters, any use of [std|boost]::array<T> where T is not default
> constructible and I do not wish to make it so just so I can use it
> in an array.
Yes, but this is a fixed size case. I was interested in the variable-sized
Jeffrey Lee Hellrung, Jr. wrote:
> My problem required storing a variable but compile-time-bounded
> number of not-necessarily-default-constructible-objects in an array.
> Specifically, I was storing some representation of the sub-simplex
> intersections between two d-dimensional simplices, where d was a
> compile-time constant (typically 2 or 3). The number of such
> is bounded in terms of the dimension d, and this was a computational
> intensive part of the application, so avoiding heap access was desirable.
This is a good example. If the intended use case of this class is only when
the size is compile time bounded, I agree that push_back/insert/resize
should assert. If it's intended to have a wider use, though...
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