NAME
    Regexp::Util - A selection of general-utility regexp subroutines
SYNOPSIS
       use Regexp::Util qw( :all );
    
       my $stringified = serialize_regexp( qr/^foo/ );
       my $regexp      = deserialize_regexp( $stringified );
    
       "foobar" =~ $regexp;
DESCRIPTION
    This module provides the following functions:
    `is_regexp($ref)`
        Returns a boolean indicating whether $ref is a regexp reference. Is
        not tricked by blessed regexps.
    `regexp_seen_evals($re)`
        Returns true if $re contains embedded Perl code.
    `regexp_is_foreign($re)`
        Returns true if $re uses a regexp engine plugin.
        (Since Perl 5.10, it has been possible to use regexp engine plugins,
        such as re::engine::PCRE and re::engine::RE2.)
    `serialize_regexp($re)`
        Serializes the regexp to a string of Perl code.
        Croaks if the regexp contains embedded Perl code, or uses a regexp
        engine plugin.
    `deserialize_regexp($str)`
        Evaluates a string of Perl code generated by `serialize_regexp` to
        return the original regexp object. Uses Safe, and also checks that the
        return value is a regexp, so should be *somewhat* safer than
        `eval($str)`.
    This module can also re-export `regexp_pattern($re)`, `regmust($re)`,
    `regname($name, $all)`, `regnames($all)`, and `regnames_count()` from re
    for convenience.
BUGS
    Please report any bugs to
    <http://rt.cpan.org/Dist/Display.html?Queue=Regexp-Util>.
SEE ALSO
    More regexp stuff: re.
    Other util modules: Scalar::Util, List::Util, Hash::Util.
AUTHOR
    Toby Inkster <tobyink@cpan.org>.
COPYRIGHT AND LICENCE
    This software is copyright (c) 2014, 2018 by Toby Inkster.
    This is free software; you can redistribute it and/or modify it under the
    same terms as the Perl 5 programming language system itself.
DISCLAIMER OF WARRANTIES
    THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
    WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
    MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.