Perl language syntax highlighting troubles (bug or limitation ?)
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To be honest - I’m not a regex expert at all :-D
If you, as a perl developer, say so I would absolutely believe it is :-) -
In your Python regexp, what’s the meaning of:
- “\3”
- “, [2]” and “[2,3]” ?
If I can understand what I think I could translate a Perl regex code into python (for this case at least).
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What about using this
(?s)((<<)\h+(["|'])(\w+?)\3\h*;.*?\4) -
- is the boost:regex convention to denote match group 3
and - 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 specifyr'(word1)(word2)(word3)', [0]everything would be colored.
Does this makes sense to you?
- is the boost:regex convention to denote match group 3
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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 -
(?s) is a modifier telling the engine that the dot matches line endings
and yes, the engine uses \1 and $1Here the link to the documentation - maybe easier for you.
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ooppps
(?s)((<<)\h+(["|'])(\w+?)\3\h*;.*?\3):-D
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This post is deleted! -
Ok
another one: in Python you must say["|']instead of Perl["'](‘either one of the set’) ? Is that what it means ? -
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. -
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? -
or maybe this one might be even better
(?s)(<<)\h+(["'])(\w+?)\2\h*;.*?\3 -
Can’t reply what I wanted, a robot says I’m spamming…
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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.
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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. -
Now, if I say in Pyhton (attempt to transliterate from Perl) :
(r'(?s)(\h*(<<)\h*["|']?([^"|^']+?)["|']?\h*;.*?\3)', [2])does it mean :
- form REGEXP
- do not match NL with DOT
- matches any horizontal blanks (0 or more), don’t make a group
- matches ‘<<’ make it a group
- matches any horizontal blanks (0 or more), don’t make a group
- matches 0 or 1 text quote (either double or single), no group
- matches a group of any chars not " nor ’ one or more time(s) (in perl it would be [^"'])
- matches 0 or 1 text quote (either double or single), no group
- possible blanks until semi-colon, semi-colon, then possible chars until NL
BUT THEN, what does mean
?\3. I’m lost there. -
a
slash m -
the
rat 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
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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.
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