Perl 5 version 20.3 documentation
Text::Wrap - line wrapping to form simple paragraphs
- use Text::Wrap;
- $initial_tab = "\t"; # Tab before first line
- $subsequent_tab = ""; # All other lines flush left
- print wrap($initial_tab, $subsequent_tab, @text);
- print fill($initial_tab, $subsequent_tab, @text);
- $lines = wrap($initial_tab, $subsequent_tab, @text);
- @paragraphs = fill($initial_tab, $subsequent_tab, @text);
- use Text::Wrap qw(wrap $columns $huge);
- $columns = 132; # Wrap at 132 characters
- $huge = 'die';
- $huge = 'wrap';
- $huge = 'overflow';
is a very simple paragraph formatter. It formats a
single paragraph at a time by breaking lines at word boundaries.
Indentation is controlled for the first line (
all subsequent lines (
) independently. Please note:
are the literal strings that will
be used: it is unlikely you would want to pass in a number.
is a simple multi-paragraph formatter. It formats
each paragraph separately and then joins them together when it's done. It
will destroy any whitespace in the original text. It breaks text into
paragraphs by looking for whitespace after a newline. In other respects,
it acts like wrap().
compresses trailing whitespace into one newline, and
deletes all trailing whitespace.
return a single string.
Unlike the old Unix fmt(1) utility, this module correctly accounts for any Unicode combining characters (such as diacriticals) that may occur in each line for both expansion and unexpansion. These are overstrike characters that do not increment the logical position. Make sure you have the appropriate Unicode settings enabled.
has a number of variables that control its behavior.
Because other modules might be using
it is suggested
that you leave these variables alone! If you can't do that, then
local($Text::Wrap::VARIABLE) = YOURVALUE
when you change the
values so that the original value is restored. This
will not work if you import the variable into your own namespace.
Lines are wrapped at
columns (default value: 76).
should be set to the full width of your output
device. In fact, every resulting line will have length of no more than
$columns - 1
It is possible to control which characters terminate words by
. Set this to a string such as
(to break before spaces or colons) or a pre-compiled regexp
qr/[\s']/ (to break before spaces or apostrophes). The
default is simply
; that is, words are terminated by spaces.
(This means, among other things, that trailing punctuation such as
full stops or commas stay with the word they are "attached" to.)
to a regular expression that doesn't
eat any characters (perhaps just a forward look-ahead assertion) will
Beginner note: In example 2, above
is imported into
the local namespace, and set locally. In example 3,
is set in its own namespace without importing it.
starts its work by expanding all the tabs in its
input into spaces. The last thing it does it to turn spaces back
into tabs. If you do not want tabs in your results, set
to a false value. Likewise if you do not
want to use 8-character tabstops, set
the number of characters you do want for your tabstops.
If you want to separate your lines with something other than
to your preference. This replaces
all newlines with
. If you just want to
preserve existing newlines but add new breaks with something else, set
When words that are longer than
are encountered, they
are broken up.
This behavior can be overridden by setting
'die' or to 'overflow'. When set to 'die', large words will cause
die() to be called. When set to 'overflow', large words will be
Historical notes: 'die' used to be the default value of
. Now, 'wrap' is the default value.
- print wrap("\t","",<<END);
- This is a bit of text that forms
- a normal book-style indented paragraph
- " This is a bit of text that forms
- a normal book-style indented paragraph
- print wrap("","","This is a bit of text that forms a normal book-style paragraph");
- "This is a bit of|text that forms a|normal book-style|paragraph"
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
for obsolete perls and
for current perls.
This man page is for the version for modern perls and so that's probably what you've got.
David Muir Sharnoff <firstname.lastname@example.org> with help from Tim Pierce and many many others.
Copyright (C) 1996-2009 David Muir Sharnoff. 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::Wrap" unless it passes the unmodified Text::Wrap test suite.