Perl 5 version 8.0 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';
- $huge = 'overflow';
is a very simple paragraph formatter. It formats a
single paragraph at a time by breaking lines at word boundries.
Indentation is controlled for the first line (
all subsquent lines (
) independently. Please note:
are the literal strings that will
be used: it is unlikley you would want to pass in a number.
Text::Wrap::fill() is a simple multi-paragraph formatter. It formats each paragraph separately and then joins them together when it's done. It will destory any whitespace in the original text. It breaks text into paragraphs by looking for whitespace after a newline. In other respects it acts like wrap().
has a number of variables that control its behavior.
Because other modules might be using
it is suggested
that you leave these variables alone! If you can't do that, then
local($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
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.)
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.
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","","This is a bit of text that forms
- a normal book-style paragraph");
David Muir Sharnoff <email@example.com> with help from Tim Pierce and many many others.