Re: [Boost-users] Regex Design trap

Subject: Re: [Boost-users] Regex Design trap
From: John Maddock (boost.regex_at_[hidden])
Date: 2010-09-09 11:29:55

> But one point stays open yet: Why returning the matches as out parameter
> instead as return value?

If you need to perform many repeated matches on the same regex then re-using 
the same match_results each time saves regex_search from having to perform 
any memory allocation: again it's a big win in performance terms.  You can't 
do that if the structure is returned by value.

John.