Re: [Boost-users] Boost: Regular Expression question/bug?

From: Darren Garvey (lists.drrngrvy_at_[hidden])
Date: 2007-02-15 19:48:01

Hi Derrick,

On 15/02/07, Derrick Schommer <schommer_at_[hidden]> wrote:
>
> Hi,
>
> I'm trying to understand if a regular expression I've designed is
> working correctly. It seems that I can make the regular expression
> match work "off by one" character in certain circumstances. For
> instance:
>
> The pattern: ".{1,3}" finds 1 to 3 characters, however
>
> The pattern:  ".[^b]{1,3}" finds 1 to 4 characters...?
> <dice>

The reason the second patter finds 1-4 chars is because you've asked for '.'
(any character) followed by [^b]{1,3} (1-3 of any character except b). If
you want 1-3 of anything except b, then just "[^b]{1,3}" is all you need.

hth,
Darren