NAME
    Regexp::Stringify - Stringify a Regexp object

VERSION
    This document describes version 0.02 of Regexp::Stringify (from Perl
    distribution Regexp-Stringify), released on 2015-01-06.

SYNOPSIS
    Assuming this runs on Perl 5.14 or newer.

     use Regexp::Stringify qw(stringify_regexp);
     $str = stringify_regexp(regexp=>qr/a/i);                       # '(^i:a)'
     $str = stringify_regexp(regexp=>qr/a/i, with_qr=>1);           # 'qr(a)i'
     $str = stringify_regexp(regexp=>qr/a/i, plver=>5.010);         # '(?:(?i-)a)'
     $str = stringify_regexp(regexp=>qr/a/ui, plver=>5.010);        # '(?:(?i-)a)'

FUNCTIONS
  stringify_regexp(%args) -> str
    Stringify a Regexp object.

    This routine is an alternative to Perl's default stringification of
    Regexp object (i.e.:"$re") and has some features/options, e.g.:
    producing regexp string that is compatible with certain perl versions.

    If given a string (or other non-Regexp object), will return it as-is.

    Arguments ('*' denotes required arguments):

    *   plver => *str*

        Target perl version.

        Try to produce a regexp object compatible with a certain perl
        version (should at least be >= 5.10).

        For example, in perl 5.14 regex stringification changes, e.g.
        "qr/hlagh/i" would previously be stringified as "(?i-xsm:hlagh)",
        but now it's stringified as "(?^i:hlagh)". If you set "plver" to
        5.10 or 5.12, then this routine will still produce the former. It
        will also ignore regexp modifiers that are introduced in newer
        perls.

        Note that not all regexp objects will be translated to older perls,
        e.g. if it contains constructs not known to older perls.

    *   regexp* => *re*

    *   with_qr => *bool*

        If you set this to 1, then "qr/a/i" will be stringified as 'qr/a/i'
        instead as '(^i:a)'. The resulting string can then be eval-ed to
        recreate the Regexp object.

    Return value: (str)

HOMEPAGE
    Please visit the project's homepage at
    <https://metacpan.org/release/Regexp-Stringify>.

SOURCE
    Source repository is at
    <https://github.com/perlancar/perl-Regexp-Stringify>.

BUGS
    Please report any bugs or feature requests on the bugtracker website
    <https://rt.cpan.org/Public/Dist/Display.html?Name=Regexp-Stringify>

    When submitting a bug or request, please include a test-file or a patch
    to an existing test-file that illustrates the bug or desired feature.

AUTHOR
    perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE
    This software is copyright (c) 2015 by perlancar@cpan.org.

    This is free software; you can redistribute it and/or modify it under
    the same terms as the Perl 5 programming language system itself.