Text::Tabs(3p) Perl Programmers Reference Guide Text::Tabs(3p)

Text::Tabs(3p) Perl Programmers Reference Guide Text::Tabs(3p) #

Text::Tabs(3p) Perl Programmers Reference Guide Text::Tabs(3p)

NNAAMMEE #

 Text::Tabs - expand and unexpand tabs like unix expand(1) and unexpand(1)

SSYYNNOOPPSSIISS #

   use Text::Tabs;

   $tabstop = 4;  # default = 8
   @lines_without_tabs = expand(@lines_with_tabs);
   @lines_with_tabs = unexpand(@lines_without_tabs);

DDEESSCCRRIIPPTTIIOONN #

 Text::Tabs does most of what the unix utilities eexxppaanndd(1) and uunneexxppaanndd(1)
 do.  Given a line with tabs in it, "expand" replaces those tabs with the
 appropriate number of spaces.  Given a line with or without tabs in it,
 "unexpand" adds tabs when it can save bytes by doing so, like the
 "unexpand -a" command.

 Unlike the old unix utilities, this module correctly accounts for any
 Unicode combining characters (such as diacriticals) that may occur in
 each line for both expansion and unexpansion.  These are overstrike
 characters that do not increment the logical position.  Make sure you
 have the appropriate Unicode settings enabled.

EEXXPPOORRTTSS #

 The following are exported:

 expand
 unexpand
 $tabstop
     The $tabstop variable controls how many column positions apart each
     tabstop is.  The default is 8.

     Please note that "local($tabstop)" doesn't do the right thing and if
     you want to use "local" to override $tabstop, you need to use
     "local($Text::Tabs::tabstop)".

EEXXAAMMPPLLEE #

   #!perl
   # unexpand -a
   use Text::Tabs;

   while (<>) {
     print unexpand $_;
   }

 Instead of the shell's "expand" command, use:

   perl -MText::Tabs -n -e 'print expand $_'

 Instead of the shell's "unexpand -a" command, use:

   perl -MText::Tabs -n -e 'print unexpand $_'

BBUUGGSS #

 Text::Tabs handles only tabs ("\t") and combining characters ("/\pM/").
 It doesn't count backwards for backspaces ("\t"), omit other non-printing
 control characters ("/\pC/"), or otherwise deal with any other zero-,
 half-, and full-width characters.

LLIICCEENNSSEE #

 Copyright (C) 1996-2002,2005,2006 David Muir Sharnoff.  Copyright (C)
 2005 Aristotle Pagaltzis Copyright (C) 2012-2013 Google, Inc.  This
 module may be modified, used, copied, and redistributed at your own risk.
 Although allowed by the preceding license, please do not publicly
 redistribute modified versions of this code with the name "Text::Tabs"
 unless it passes the unmodified Text::Tabs test suite.

perl v5.36.3 2023-02-15 Text::Tabs(3p)