in reply to Compiling and Installing Perl

Because, of all the things you can do with the -D switch, debugging REs is the most commonly wanted when not debugging perl itself, you can do: 
$ perl -we'use re "debug"; qr/[\s*\W*]/'
Compiling REx `[\s*\W*]'
size 13 Got 108 bytes for offset annotations.
first at 1
   1: ANYOF[\0-/:-@[-\^`{-\377+utf8::IsSpacePerl !utf8::IsWord](13)
  13: END(0)
stclass `ANYOF[\0-/:-@[-\^`{-\377+utf8::IsSpacePerl !utf8::IsWord]' mi
+nlen 1
Offsets: [13]
        1[8] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 9[
+0]
Freeing REx: `"[\\s*\\W*]"'

[download]
even on a non-debugging perl.

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Re: Re: Compiling and Installing Perl
by Anonymous Monk on Dec 05, 2003 at 08:06 UTC
    Except nobody will reccomend you write code like that :) 
    perl -Mre=debug -we'qr/[\s*\W*]/'

    [download]
    perldoc perlrun
[reply]
[d/l]
      In my experience, the -M switch isn't as widely understood as "use" :). I've gotten comments a number of times indicating that peoples eyes glaze over when they see a switch they don't know, even where it should be pretty obvious what it does.

      That said, here's a cool way to check a module's version number: perl -MName::Of::Module=99999999

[reply]
[d/l]
      Thanks to everyone for their answers. If I can get the time (and the nerve) I will try installing Perl 5.8.1. In the the meantime I will use the command line code from AnonyMonk and study the code ysth sent.

      Thanks to all,

      xenchu


      ****sigfilesigfilesigfilesigfilesigfilesigfilesigfilesigfile

      Perl has one Great Advantage and one Great Disadvantage:

      It is very easy to write a complex and powerful program in three lines of code.

      ********************************************

      The Needs of the World and my Talents run parallel to infinity.
[reply]
[d/l]

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