Re: [Boost-users] [ptr_container] Transferring the Last Element from a ptr_vector

Subject: Re: [Boost-users] [ptr_container] Transferring the Last Element from a ptr_vector
From: Nat Goodspeed (nat_at_[hidden])
Date: 2009-09-09 11:55:43

Charles Brockman wrote:

> Thorsten Ottosen wrote:
>> You can't use reverse iterators in transfer.
> 
> Thank you, Thorsten. I'll create an iterator to the last element and use 
> that in the transfer.
> 
> GeneVectType::iterator othEndIter = other->geneVect.end();
> --othEndIter;
> geneVect.transfer(geneVect.begin(), othEndIter, other->geneVect);

Um -- I'm under the impression that decrementing the iterator returned 
by end() is discouraged. There are containers for which that definitely 
would not work.

I'm guessing that he would recommend something like 
other->geneVect.rbegin().base() instead -- presuming you've already 
ensured that other->geneVect isn't empty.