Re: [Boost-users] boost::regex - how to do a search_rev() ?

From: John Maddock (john_at_[hidden])
Date: 2008-04-02 11:28:02

fxplus wrote:
> Hi all,
>
> String classes usually have a search_rev() function to start search
> from the rightmost end. Is it possible to do such a search using
> boost::regex?

No there's no direct support for that in Boost.Regex: the semantics of how a 
reverse search should behave for a regular expression are far from clearly 
defined.

> I need to find out if a text buffer (usually of size in hundreds of
> MBs) has certain sequences in the end.

Can you express the pattern in reverse and then search forwards in 
reverse-iterators?  I hope that makes sense... John.