Re: [boost] auto_vector - vector with auto_ptr semantics

From: Howard Hinnant (hinnant_at_[hidden])
Date: 2002-02-05 13:34:27

On Tuesday, February 5, 2002, at 01:26  PM, Peter Dimov wrote:

> But isn't this inefficient? One of our goals is to eliminate copy
> constructors where possible, because they may do a deep-copy. The fast
> reallocation is either move-construct-from-object + destruct or
> move-construct-from-raw.

The only copy construction I mentioned (or intended to mention) was from 
the input argument x:

vector::insert(iterator position, size_type n, const value_type& x);

All initial elements are moved (and only once).

> The "insert range in the middle" operation is problematic with #3, I 
> admit.
> You could probably ensure capacity() for one extra element, copy 
> construct
> at the end, then move around using that uninitialized slot as a 
> temporary.
> :-)

Not in *my* vector! ;-)

-Howard