[boost] Re: Regex ease-of-use ideas

From: David Abrahams (dave_at_[hidden])
Date: 2004-04-06 14:22:04

"Eric Niebler" <eric_at_[hidden]> writes:

> David Abrahams wrote:
>
>> Well if we could solve problem #1, the expense of the initial
>> construction becomes a non-issue for my case, because I'd only have
>> to search once.  And regardless of all that, often convenience is
>> *way* more important than efficiency.
>> That said, as long as the match object is immutable, there's little
>> to worry about w.r.t. thread safety.
>> 
>
> Here there be dragons. An immutable match object is appealing, but the
> performance would be problematic. The match object is essentially a
> std::vector of sub-matches, dynamically allocated because you don't
> know how many sub-matches there will be until runtime.

Well, making the match object immutable is not my preferred approach
anyway; I was just trying to help John out.

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