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, $keep, @lines);
         @words = quotewords($delim, $keep, @lines);
         @words = shellwords(@lines);
         @words = parse_line($delim, $keep, $line);
         @words = old_shellwords(@lines); # DEPRECATED!

DESCRIPTION
       The &nested_quotewords() and &quotewords() 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.  &quotewords() 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., &quotewords() 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 &quotewords(), and it does token parsing
       with whitespace as a delimiter-- similar to most Unix shells.

EXAMPLES
       The sample program:

         use Text::ParseWords;
         @words = quotewords('\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 "quotewords('\s+', 0, q{this   is...})" with "shellwords(q{this   is...})" is a
       simpler way to accomplish the same thing.

SEE ALSO
       Text::CSV - for parsing CSV files

AUTHORS
       Maintainer: Alexandr Ciornii <alexchornyATgmail.com>.

       Previous maintainer: 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).

POD ERRORS
       Hey! The above document had some coding errors, which are explained below:

       Around line 250:
           Expected text after =item, not a number

       Around line 254:
           Expected text after =item, not a number

       Around line 258:
           Expected text after =item, not a number

       Around line 262:
           Expected text after =item, not a number

       Around line 266:
           Expected text after =item, not a number



perl v5.20.2                                2014-12-27                    Text::ParseWords(3perl)