Re^3: Regex for removing Template::Toolkit comments?

#!/usr/bin/perl

# https://perlmonks.org/?node_id=1221039

use strict;
use warnings;

my $someTTstring = <<END;
before
[% # this is a comment to the end of line
   foo = 'bar'
%]

<p>bw, bliako</p>

[%# placing the '#' immediately inside the directive
    tag comments out the entire directive
%]
[% outside %]
[%# placing the '#' immediately inside the directive
    tag comments out the entire directive
    [% inside %]
%]
after
END

print stripcomments($someTTstring);

sub stripcomments
  {
  @_ and local $_ = shift;
  my $answer = '';
  $answer .=
    /\G\[\%#/gc ? stripcomments() x 0 :
    /\G\[\%/gc ? '[%' . stripcomments() =~ s/#.*//gr . '%]' :
    /\G\%\]/gc ? return $answer :
    /\G./gcs ? $& :
    return $answer while 1;
  }
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Re^4: Regex for removing Template::Toolkit comments? by bliako (Abbot) on Aug 27, 2018 at 10:41 UTC
In my attempts I have omitted `@_ and` and was getting `Use of uninitialized value $_`, but forgotten about when you call it later on without any params. So, that works for multiline comments but not single line. I have put the following test input which I presume is valid Template::Toolkit comment syntax with the exception of nested comments which I am not sure. I will go the Parser way haukex posted. thanks [%# comment nust be removed 1 %] [% # comment nust be removed 2 must stay 0 %] [% # comment nust be removed 3 must stay 1 %] [% # comment nust be removed 4 must stay 2 # comment nust be removed 5 [%# nested comment (not sure if allowed or not) 1 %] %] [%# comment nust be removed 6 comment nust be removed 7 comment nust be removed 8 [%# nested comment (not sure if allowed or not) 2 %] %] [% # comment nust be removed 9 [% comment nust be removed 10 %] [% # nested comment (not sure if allowed or not) 2 %] %] [% must stay 3 %] [% must stay 4 must stay 5 # comment nust be removed 11 %] [% # comment nust be removed 12 must stay 6 %] [download]	[reply] [d/l] [select]
Re^5: Regex for removing Template::Toolkit comments? by tybalt89 (Monsignor) on Aug 27, 2018 at 13:16 UTC
Both `comment nust be removed 9` [download] and `comment nust be removed 10` [download] are incorrect, they should both stay under the rules you posted.	[reply] [d/l] [select]
Re^6: Regex for removing Template::Toolkit comments? by bliako (Abbot) on Aug 27, 2018 at 14:46 UTC
sorry, yes you are right `[% # this is a comment to the end of line foo = 'bar' %] [%# placing the '#' immediately inside the directive tag comments out the entire directive %]` [download] (http://www.template-toolkit.org/docs/modules/Template.html#section_COMMENTS)	[reply] [d/l]