Regexp::Common::whitespace(3) User Contributed Perl Documentation Regexp::Common::whitespace(3)

Regexp::Common::whitespace -- provides a regex for leading or trailing whitescape

use Regexp::Common qw /whitespace/;

while (<>) {
    s/$RE{ws}{crop}//g;           # Delete surrounding whitespace

Please consult the manual of Regexp::Common for a general description of the works of this interface.

Do not use this module directly, but load it via Regexp::Common.

Returns a pattern that identifies leading or trailing whitespace.

For example:

$str =~ s/$RE{ws}{crop}//g;     # Delete surrounding whitespace

The call:


is optimized (but probably still slower than doing the s///g explicitly).

This pattern does not capture under "-keep".

Regexp::Common for a general description of how to use this interface.

Damian Conway (

This package is maintained by Abigail (

Bound to be plenty.

For a start, there are many common regexes missing. Send them in to

This software is Copyright (c) 2001 - 2017, Damian Conway and Abigail.

This module is free software, and maybe used under any of the following licenses:

1) The Perl Artistic License.     See the file COPYRIGHT.AL.
2) The Perl Artistic License 2.0. See the file COPYRIGHT.AL2.
3) The BSD License.               See the file COPYRIGHT.BSD.
4) The MIT License.               See the file COPYRIGHT.MIT.
2020-06-21 perl v5.32.0