Re: [boost] [shared_array] Why not in C++11 ?

Subject: Re: [boost] [shared_array] Why not in C++11 ?
From: Glen Fernandes (glen.fernandes_at_[hidden])
Date: 2013-07-08 00:13:19

On Sun, Jul 7, 2013 at 8:27 PM, Andrey Semashev
<andrey.semashev_at_[hidden]> wrote:
> ...or even shared_ptr< array<...> >?

One advantage of boost::shared_ptr<T[N]> p1; over shared_ptr<array<T,
N>> p2; is that the former gives you p1[index] which is slightly nicer
than (*p2)[index]. In the case of both, the size N is already known at
compile time anyway since it is part of the type.

> Why not simply use vector or shared_ptr< vector<...> >?

If what he really wants is a std::vector<T>, this is a good
alternative. If not, he pays for a few things you may not use: e.g.
one additional allocation compared to boost::shared_ptr<T[]>.

Glen