Perl language syntax highlighting troubles (bug or limitation ?)

[Ekopalypse]

What about using this
(?s)((<<)\h+(["|'])(\w+?)\3\h*;.*?\4)

[Ekopalypse]

1. is the boost:regex convention to denote match group 3
   and
2. defines which match group actually should be painted

Like if you have:

r'(word1)(word2)(word3)', [2,3]

would mean that only word2 and word3 would be painted
whereas if you would specify

r'(word1)(word2)(word3)', [0]

everything would be colored.

Does this makes sense to you?

[Gilles Maisonneuve]

@Ekopalypse

I don’t understand your regexp syntax. Perhaps too ‘pythonized’ for me.

(?s) : what does it mean ? is it ‘s///’ ? or really a non capturing group of ‘s’ ???
\3 \4 : are they $3 $4, I don’t think as I can’t see a 4th accumulator

[Ekopalypse]

(?s) is a modifier telling the engine that the dot matches line endings
and yes, the engine uses \1 and $1

Here the link to the documentation - maybe easier for you.

[Ekopalypse]

ooppps

(?s)((<<)\h+(["|'])(\w+?)\3\h*;.*?\3)

:-D

[Gilles Maisonneuve]

This post is deleted!

[Gilles Maisonneuve]

@Ekopalypse

Ok
another one: in Python you must say ["|'] instead of Perl ["'] (‘either one of the set’) ? Is that what it means ?

[Ekopalypse]

No, afaik non-capturing group is (?:pattern)
This, (?s), just tells the engine that the dot . is matching
EOLs like \r\n - if I’m right.

[Ekopalypse]

Just for clarification, the python script does NOT use the python regex engine instead
it uses the one notepad++ offers, the boost::regex.
Yes, you can use the enumeration without the pipe but makes it more visible for me with
the pipe sign. Or is there a difference if used with pipe sign or without?

[Ekopalypse]

or maybe this one might be even better
(?s)(<<)\h+(["'])(\w+?)\2\h*;.*?\3

[Gilles Maisonneuve]

Can’t reply what I wanted, a robot says I’m spamming…

[Ekopalypse]

@Gilles-Maisonneuve

Can’t reply what I wanted, a robot says I’m spamming…

I have no idea why this happens sometimes.

By the way, now that you have installed pythonscript plugin would you mind
clicking Plugins->Python Script->Scripts->Samples->RegexTester ?

I know not everyone is recommending it but, personally, I love it.

[Gilles Maisonneuve]

AFAIK, at least in Perl, ["|'] means double-quote OR pipre OR simple-quote, everything between square brakets is literal. Also true in “awk” and C regexp I think.
I don’t know for Python.

[Gilles Maisonneuve]

@Ekopalypse

Now, if I say in Pyhton (attempt to transliterate from Perl) :

(r'(?s)(\h*(<<)\h*["|']?([^"|^']+?)["|']?\h*;.*?\3)', [2])

does it mean :

1. form REGEXP
2. do not match NL with DOT
3. matches any horizontal blanks (0 or more), don’t make a group
4. matches ‘<<’ make it a group
5. matches any horizontal blanks (0 or more), don’t make a group
6. matches 0 or 1 text quote (either double or single), no group
7. matches a group of any chars not " nor ’ one or more time(s) (in perl it would be [^"'])
8. matches 0 or 1 text quote (either double or single), no group
9. possible blanks until semi-colon, semi-colon, then possible chars until NL

BUT THEN, what does mean ?\3. I’m lost there.

[Gilles Maisonneuve]

a slash m

[Ekopalypse]

the r at the beginning just informs python that this is a raw string and
every char must be taken literally otherwise backslashes would be treated
as escapes under some circumstances.

The regex string is only this part

(?s)(\h*(<<)\h*["|']?([^"|^']+?)["|']?\h*;.*?\3)

and I would say, but as said - not an regex expert at all,

(?s) means Dot matches newline characters
the first matching group is

(\h*(<<)\h*["|']?([^"|^']+?)["|']?\h*;.*?\3)

the second

(<<)

and the third must be

([^"|^']+?)

if I’m right.

\3 should be the same as $3 in perl

[Gilles Maisonneuve]

@Ekopalypse

still confused: ([^"|^']+?) why a ‘?’ after the ‘+’ what’s for this ‘?’

and then \3 would mean the 3rd matching group (third ‘()’) but in Perl is used only in subsitutions. What is the use here ? There are only 2 groups in the regex (two blocks surrounded by parenthèses only.

[Ekopalypse]

@Gilles-Maisonneuve

maybe this picture makes it a little bit clearer

[Ekopalypse]

@Gilles-Maisonneuve

still confused: ([^"|^']+?) why a ‘?’ after the ‘+’ what’s for this ‘?’

as less as possible - non-greedy

and then \3 would mean the 3rd matching group (third ‘()’) but in Perl is used only in >subsitutions. What is the use here ? There are only 2 groups in the regex (two blocks >surrounded by parenthèses only.

placeholder for what was found in match group 3, to find the EOT at the end

and there are 3 match groups or am I missing something??

[Gilles Maisonneuve]

@Ekopalypse

2 sets of parenteses only, where is the third set ?
so only 2 match groups

can you make this work :

no syntax error on the python console but absolutely no result, where is my bug ?

regexes[(3, (255,255,255))] = (r'(?s)(\s*(<<)\s*("{0,1}.+"{0,1})\s*;.*?\3)', [1])