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Text::ParseWords(3perl) Perl Programmers Reference Guide Text::ParseWords(3perl)
NAME
Text::ParseWords - parse text into an array of tokens or array of arrays
SYNOPSIS
use Text::ParseWords;
@lists = &nested_quotewords($delim, $keep, @lines);
@words = "ewords($delim, $keep, @lines);
@words = &shellwords(@lines);
@words = &parse_line($delim, $keep, $line);
@words = &old_shellwords(@lines); # DEPRECATED!
DESCRIPTION
The &nested_quotewords() and "ewords() functions accept a delimiter (which can be a
regular expression) and a list of lines and then breaks those lines up into a list of
words ignoring delimiters that appear inside quotes. "ewords() returns all of the
tokens in a single long list, while &nested_quotewords() returns a list of token lists
corresponding to the elements of @lines. &parse_line() does tokenizing on a single
string. The &*quotewords() functions simply call &parse_line(), so if you're only
splitting one line you can call &parse_line() directly and save a function call.
The $keep argument is a boolean flag. If true, then the tokens are split on the specified
delimiter, but all other characters (quotes, backslashes, etc.) are kept in the tokens.
If $keep is false then the &*quotewords() functions remove all quotes and backslashes that
are not themselves backslash-escaped or inside of single quotes (i.e., "ewords() tries
to interpret these characters just like the Bourne shell). NB: these semantics are
significantly different from the original version of this module shipped with Perl 5.000
through 5.004. As an additional feature, $keep may be the keyword "delimiters" which
causes the functions to preserve the delimiters in each string as tokens in the token
lists, in addition to preserving quote and backslash characters.
&shellwords() is written as a special case of "ewords(), and it does token parsing
with whitespace as a delimiter-- similar to most Unix shells.
EXAMPLES
The sample program:
use Text::ParseWords;
@words = "ewords('\s+', 0, q{this is "a test" of\ quotewords \"for you});
$i = 0;
foreach (@words) {
print "$i: <$_>\n";
$i++;
}
produces:
0: <this>
1: <is>
2: <a test>
3: <of quotewords>
4: <"for>
5: <you>
demonstrating:
0 a simple word
1 multiple spaces are skipped because of our $delim
2 use of quotes to include a space in a word
3 use of a backslash to include a space in a word
4 use of a backslash to remove the special meaning of a double-quote
5 another simple word (note the lack of effect of the backslashed double-quote)
Replacing ""ewords('\s+', 0, q{this is...})" with "&shellwords(q{this is...})" is
a simpler way to accomplish the same thing.
AUTHORS
Maintainer is Hal Pomeranz <pomeranz AT netcom.com>, 1994-1997 (Original author unknown).
Much of the code for &parse_line() (including the primary regexp) from Joerk Behrends
<jbehrends AT multimediaproduzenten.de>.
Examples section another documentation provided by John Heidemann <johnh AT ISI.EDU>
Bug reports, patches, and nagging provided by lots of folks-- thanks everybody! Special
thanks to Michael Schwern <schwern AT envirolink.org> for assuring me that a
&nested_quotewords() would be useful, and to Jeff Friedl <jfriedl AT yahoo-inc.com> for
telling me not to worry about error-checking (sort of-- you had to be there).
perl v5.10.0 2011-06-30 Text::ParseWords(3perl)
Generated by $Id: phpMan.php,v 4.49 2006/02/26 13:18:18 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2012-05-25 03:41 @38.107.179.238 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)