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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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