NAME
    Data::Circular::Util - Data utilities

VERSION
    This document describes version 0.58 of Data::Circular::Util (from Perl
    distribution Data-Circular-Util), released on 2014-12-05.

SYNOPSIS
DESCRIPTION
FUNCTIONS
  clone_circular_refs($data) -> any
    Remove circular references by deep-copying them.

    For example, this data:

     $x = [1];
     $data = [$x, 2, $x];

    contains circular references by referring to $x twice. After
    "clone_circular_refs", data will become:

     $data = [$x, 2, [1]];

    that is, the subsequent circular references will be deep-copied. This
    makes it safe to transport to JSON, for example.

    Sometimes it doesn't work, for example:

     $data = [1];
     push @$data, $data;

    Cloning will still create circular references.

    This function modifies the data structure in-place, and return true for
    success and false upon failure.

    Arguments ('*' denotes required arguments):

    *   data* => *any*

    Return value:

     (any)

  has_circular_ref($data) -> any
    Check whether data item contains circular references.

    Does not deal with weak references.

    Arguments ('*' denotes required arguments):

    *   data* => *any*

    Return value:

     (any)

SEE ALSO
    SHARYANTO

    Data::Structure::Util has the XS version of "has_circular_ref" which is
    at least around 3 times faster than this module's implementation which
    is pure Perl. Use that instead if possible (in some cases,
    Data::Structure::Util fails to build and this module provides an
    alternative for that function). Data::Structure::Util does not the
    equivalent of this module's "clone_circular_refs" though.

    This module is however much faster than Devel::Cycle.

HOMEPAGE
    Please visit the project's homepage at
    <https://metacpan.org/release/Data-Circular-Util>.

SOURCE
    Source repository is at
    <https://github.com/perlancar/perl-SHARYANTO-Data-Util>.

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

    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) 2014 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.