Re: [boost] UTF8 library - second call for informal review

From: David Abrahams (dave_at_[hidden])
Date: 2006-12-08 21:37:36

Anthony Williams <anthony_w.geo_at_[hidden]> writes:

> Nemanja Trifunovic <nemanja_trifunovic_at_[hidden]> writes:
>
>>> Just because the vast majority of sequences will be random access doesn't 
>> mean
>>> we should limit ourselves to that, when it is so easy to allow the use of
>>> Forward Iterators.
>>> 
>>
>> Bidirectional maybe, but using a forward iterator would break some important 
>> functionality: for instance, if an invalid sequence is detected, we step back 
>> to the beginning of the sequence before reporting the error. 
>
> Forward Iterators are copyable, so you can do this by keeping a copy of the
> beginning of the sequence, and returning that on error.

Yeah, I *hope* you'd do the same with bidirectional iterators.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com