Re: [Boost-users] Xpressive continuing search from previous match

Subject: Re: [Boost-users] Xpressive continuing search from previous match
From: Eric Niebler (eric_at_[hidden])
Date: 2010-01-07 22:14:25

On 1/8/2010 11:21 AM, K. Noel Belcourt wrote:
>
> On Jan 7, 2010, at 5:01 PM, K. Noel Belcourt wrote:
>
>> Hi,
>>
>> I have a search for a regular expression like this.
>>
>> sregex_iterator cur(buffer.begin(), buffer.end(), defined_re), end;
>> for(; cur != end; ++cur) { ...
>>
>> But what I really want to do is perform a new regex search starting
>> at the location in the buffer marking the end of the previous
>> search.

That's exactly what sregex_iterator does.

>> Is there a way to get the buffer index from the previous
>> search so I can start the new search past the previous search?
>
> Okay, seems like you can use:
>
> smatch const &what = *cur;
> what.position();
>
> to give you the byte offset into the buffer.

That would give you the offset (aka, distance; NOT the byte offset) of 
where the last match *begins*, not where it ends.

Confuzzled,

-- 
Eric Niebler
BoostPro Computing
http://www.boostpro.com