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.\" ========================================================================
.\"
.IX Title "Text::Tabs 3"
.TH Text::Tabs 3 "2019-10-24" "perl v5.30.2" "Perl Programmers Reference Guide"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
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.SH "NAME"
Text::Tabs \- expand and unexpand tabs like unix expand(1) and unexpand(1)
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  use Text::Tabs;
\&
\&  $tabstop = 4;  # default = 8
\&  @lines_without_tabs = expand(@lines_with_tabs);
\&  @lines_with_tabs = unexpand(@lines_without_tabs);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Text::Tabs does most of what the unix utilities \fBexpand\fR\|(1) and \fBunexpand\fR\|(1) 
do.  Given a line with tabs in it, \f(CW\*(C`expand\*(C'\fR replaces those tabs with
the appropriate number of spaces.  Given a line with or without tabs in
it, \f(CW\*(C`unexpand\*(C'\fR adds tabs when it can save bytes by doing so, 
like the \f(CW\*(C`unexpand \-a\*(C'\fR command.
.PP
Unlike the old unix utilities, this module correctly accounts for
any Unicode combining characters (such as diacriticals) that may occur
in each line for both expansion and unexpansion.  These are overstrike
characters that do not increment the logical position.  Make sure
you have the appropriate Unicode settings enabled.
.SH "EXPORTS"
.IX Header "EXPORTS"
The following are exported:
.IP "expand" 4
.IX Item "expand"
.PD 0
.IP "unexpand" 4
.IX Item "unexpand"
.ie n .IP "$tabstop" 4
.el .IP "\f(CW$tabstop\fR" 4
.IX Item "$tabstop"
.PD
The \f(CW$tabstop\fR variable controls how many column positions apart each
tabstop is.  The default is 8.
.Sp
Please note that \f(CW\*(C`local($tabstop)\*(C'\fR doesn't do the right thing and if you want
to use \f(CW\*(C`local\*(C'\fR to override \f(CW$tabstop\fR, you need to use
\&\f(CW\*(C`local($Text::Tabs::tabstop)\*(C'\fR.
.SH "EXAMPLE"
.IX Header "EXAMPLE"
.Vb 3
\&  #!perl
\&  # unexpand \-a
\&  use Text::Tabs;
\&
\&  while (<>) {
\&    print unexpand $_;
\&  }
.Ve
.PP
Instead of the shell's \f(CW\*(C`expand\*(C'\fR command, use:
.PP
.Vb 1
\&  perl \-MText::Tabs \-n \-e \*(Aqprint expand $_\*(Aq
.Ve
.PP
Instead of the shell's \f(CW\*(C`unexpand \-a\*(C'\fR command, use:
.PP
.Vb 1
\&  perl \-MText::Tabs \-n \-e \*(Aqprint unexpand $_\*(Aq
.Ve
.SH "SUBVERSION"
.IX Header "SUBVERSION"
This module comes in two flavors: one for modern perls (5.10 and above)
and one for ancient obsolete perls.  The version for modern perls has
support for Unicode.  The version for old perls does not.  You can tell
which version you have installed by looking at \f(CW$Text::Tabs::SUBVERSION\fR:
it is \f(CW\*(C`old\*(C'\fR for obsolete perls and \f(CW\*(C`modern\*(C'\fR for current perls.
.PP
This man page is for the version for modern perls and so that's probably
what you've got.
.SH "BUGS"
.IX Header "BUGS"
Text::Tabs handles only tabs (\f(CW"\et"\fR) and combining characters (\f(CW\*(C`/\epM/\*(C'\fR).  It doesn't
count backwards for backspaces (\f(CW"\et"\fR), omit other non-printing control characters (\f(CW\*(C`/\epC/\*(C'\fR),
or otherwise deal with any other zero\-, half\-, and full-width characters.
.SH "LICENSE"
.IX Header "LICENSE"
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 \*(L"Text::Tabs\*(R"
unless it passes the unmodified Text::Tabs test suite.