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Full Discussion: Comment based on a condition
Top Forums Shell Programming and Scripting Comment based on a condition Post 302471995 by ashwin3086 on Tuesday 16th of November 2010 01:51:44 AM
Old 11-16-2010
Comment based on a condition

I want to comment 2 lines based on a condition. If THEN occurs immediately after WHEN then i have to comment both the lunes

For example :


Code:
 
$cat file1.txt
CASE
   WHEN
        THEN  1
   WHEN
         c1= 'I'
       AND c2= '0'
        THEN  2

So in this example i want to comment the lines as shown below.

SO the required output :

Code:
 
 
$cat file1.txt
CASE
  # WHEN
   #    THEN  1
   WHEN
             c1= 'I'
       AND c2= '0'
       THEN  2

 

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PPI::Token::Comment(3)					User Contributed Perl Documentation				    PPI::Token::Comment(3)

NAME
PPI::Token::Comment - A comment in Perl source code INHERITANCE
PPI::Token::Comment isa PPI::Token isa PPI::Element SYNOPSIS
# This is a PPI::Token::Comment print "Hello World!"; # So it this $string =~ s/ foo # This, unfortunately, is not :( bar /w; DESCRIPTION
In PPI, comments are represented by "PPI::Token::Comment" objects. These come in two flavours, line comment and inline comments. A "line comment" is a comment that stands on its own line. These comments hold their own newline and whitespace (both leading and trailing) as part of the one "PPI::Token::Comment" object. An inline comment is a comment that appears after some code, and continues to the end of the line. This does not include whitespace, and the terminating newlines is considered a separate PPI::Token::Whitespace token. This is largely a convenience, simplifying a lot of normal code relating to the common things people do with comments. Most commonly, it means when you "prune" or "delete" a comment, a line comment disappears taking the entire line with it, and an inline comment is removed from the inside of the line, allowing the newline to drop back onto the end of the code, as you would expect. It also means you can move comments around in blocks much more easily. For now, this is a suitably handy way to do things. However, I do reserve the right to change my mind on this one if it gets dangerously anachronistic somewhere down the line. METHODS
Only very limited methods are available, beyond those provided by our parent PPI::Token and PPI::Element classes. line The "line" accessor returns true if the "PPI::Token::Comment" is a line comment, or false if it is an inline comment. SUPPORT
See the support section in the main module. AUTHOR
Adam Kennedy <adamk@cpan.org> COPYRIGHT
Copyright 2001 - 2011 Adam Kennedy. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of the license can be found in the LICENSE file included with this module. perl v5.18.2 2011-02-25 PPI::Token::Comment(3)
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