Posted by Rik Wasmus on 09/07/07 13:29

On Fri, 07 Sep 2007 15:07:52 +0200, gosha bine <stereofrog@gmail.com> =

wrote:

> On 07.09.2007 14:55 Rik Wasmus wrote:
>> On Fri, 07 Sep 2007 11:47:58 +0200, gosha bine <stereofrog@gmail.com>=
=

>> wrote:
>>
>>> On 07.09.2007 09:56 Rik Wasmus wrote:
>>>
>>>> ([^\2]+) #match one or more characters in match 3 that are=
=

>>>> NOT in match 2
>>>
>>> [^\2] doesn't mean "negate group 2" as you and the manual people see=
m =

>>> to think. It means "any character except that with ascii code 2".
>> Hmmz, a quick check indicates you're right, mea culpa.
>> The manual iq quite confusing at this point though:
>> "Inside a character class, or if the decimal number is greater than 9=
=

>> and there have not been that many capturing subpatterns, PCRE re-read=
s =

>> up to three octal digits following the backslash, and generates a =

>> single byte from the least significant 8 bits of the value. Any =

>> subsequent digits stand for themselves. For example:
>> ....
>> \7
>> is always a back reference
>> \11
>> might be a back reference, or another way of writing a tab"
>
> Well, it's clear enough: "Inside a character class..."

Yes it states "inside a character class IF THE NUMBER IS GREATER THEN 9"=

And continues on saying that inside a character class \7 should still be=
a =

backreference..

>> According to this, I'd expect it to be a back reference. Which bring=
s =

>> me to the question: what is the way to get a beckreference into a =

>> negated character class, if there is one?
>>
>
> Character classes are... hm... classes of _characters_, there's no way=
=

> to put references (which are _strings_) there.

Allthough single characters can, and that's all we're after, we're not =

matching 'a specific string' just 'not any collection of characters', bu=
t =

I see your point. It should be done with something like '/=3D(\'|").*?\1=
/', =

allthough escaped (by \) quoting characters require some more care (alwa=
ys =

'ignore' a single character after '\')
-- =

Rik Wasmus

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