Community
    • Login

    Perl language syntax highlighting troubles (bug or limitation ?)

    Scheduled Pinned Locked Moved Help wanted · · · – – – · · ·
    112 Posts 6 Posters 44.0k Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • EkopalypseE
      Ekopalypse @Gilles Maisonneuve
      last edited by

      @Gilles-Maisonneuve

      the regexes assumes double quotes and semicolon directly attached to EOT.
      Like

      print << "EOT";
      
      --------------------- separation line ------------------
      
      EOT
      

      Is there a rule how this is specified?

      1 Reply Last reply Reply Quote 2
      • Gilles MaisonneuveG
        Gilles Maisonneuve
        last edited by Gilles Maisonneuve

        I think I found why.
        Your regexp says :
        r'(?s)((<<)"*(\w+?)"*;.*?\3)'
        would not it be better if :
        r'(?s)(\h*(<<)\h*"*(\w+?)"*\h*;.*?\3)'

        ???

        To answer your question:

        Perl allows

        1. <<TEXT,
        2. << TEXT
        3. <<‘TEXT’ / << ‘TEXT’
        4. <<“TEXT” / << “TEXT”

        meanings differ in each case…

        1 Reply Last reply Reply Quote 2
        • EkopalypseE
          Ekopalypse
          last edited by

          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 :-)

          Gilles MaisonneuveG 1 Reply Last reply Reply Quote 1
          • Gilles MaisonneuveG
            Gilles Maisonneuve @Ekopalypse
            last edited by

            @Ekopalypse

            In your Python regexp, what’s the meaning of:

            1. “\3”
            2. “, [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).

            1 Reply Last reply Reply Quote 0
            • EkopalypseE
              Ekopalypse
              last edited by

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

              Gilles MaisonneuveG 1 Reply Last reply Reply Quote 0
              • EkopalypseE
                Ekopalypse
                last edited by

                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 MaisonneuveG 1 Reply Last reply Reply Quote 0
                • Gilles MaisonneuveG
                  Gilles Maisonneuve @Ekopalypse
                  last edited by

                  @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

                  1 Reply Last reply Reply Quote 0
                  • EkopalypseE
                    Ekopalypse
                    last edited by 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.

                    1 Reply Last reply Reply Quote 0
                    • EkopalypseE
                      Ekopalypse
                      last edited by

                      ooppps

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

                      :-D

                      Gilles MaisonneuveG 1 Reply Last reply Reply Quote 0
                      • Gilles MaisonneuveG
                        Gilles Maisonneuve @Ekopalypse
                        last edited by

                        This post is deleted!
                        1 Reply Last reply Reply Quote 0
                        • Gilles MaisonneuveG
                          Gilles Maisonneuve @Ekopalypse
                          last edited by

                          @Ekopalypse

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

                          EkopalypseE 1 Reply Last reply Reply Quote 0
                          • EkopalypseE
                            Ekopalypse
                            last edited by

                            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.

                            1 Reply Last reply Reply Quote 1
                            • EkopalypseE
                              Ekopalypse
                              last edited by 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?

                              1 Reply Last reply Reply Quote 1
                              • EkopalypseE
                                Ekopalypse
                                last edited by Ekopalypse

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

                                1 Reply Last reply Reply Quote 1
                                • Gilles MaisonneuveG
                                  Gilles Maisonneuve
                                  last edited by

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

                                  Gilles MaisonneuveG 1 Reply Last reply Reply Quote 0
                                  • EkopalypseE
                                    Ekopalypse @Gilles Maisonneuve
                                    last edited by

                                    @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.

                                    1 Reply Last reply Reply Quote 1
                                    • Gilles MaisonneuveG
                                      Gilles Maisonneuve @Gilles Maisonneuve
                                      last edited by

                                      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 MaisonneuveG 1 Reply Last reply Reply Quote 1
                                      • Gilles MaisonneuveG
                                        Gilles Maisonneuve @Gilles Maisonneuve
                                        last edited by

                                        @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 MaisonneuveG 1 Reply Last reply Reply Quote 0
                                        • Gilles MaisonneuveG
                                          Gilles Maisonneuve @Gilles Maisonneuve
                                          last edited by

                                          a slash m

                                          EkopalypseE 1 Reply Last reply Reply Quote 0
                                          • EkopalypseE
                                            Ekopalypse
                                            last edited by 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 MaisonneuveG 1 Reply Last reply Reply Quote 1
                                            • First post
                                              Last post
                                            The Community of users of the Notepad++ text editor.
                                            Powered by NodeBB | Contributors