Damian Conway

NAME

Leading::Zeros - Defuse Perl's octal number representation

VERSION

This document describes Leading::Zeros version 0.0.2

SYNOPSIS

    no Leading::Zeros;

    my $answer = 042;       # dies

  

DESCRIPTION

This module offers some control over Perl's insidious "leading-zero-means-octal" notation.

INTERFACE

If the module is loaded via a no:

    no Leading::Zeros;

then any subsequent attempt to use an integer constant with a leading zero, causes an exception to be thrown. The intention is to prevent you from doing so by accident.

If the module is loaded via a use, like so:

    use Leading::Zeros;

then it silently pretends that any octal value (say, 042) was really a decimal value (i.e. 42).

If the module is loaded with the special -warning flag:

    use Leading::Zeros -warning;

then octal numbers are treated as usual (i.e. as octals), but a warning is issued. See below.

DIAGNOSTICS

Warning: octal constant %s (decimal value: %s) used

Under use Leading::Zeros -warning you used an octal constant. It was left as an octal value, but this is the warning you asked for.

CONFIGURATION AND ENVIRONMENT

Leading::Zeros requires no configuration files or environment variables.

DEPENDENCIES

None.

INCOMPATIBILITIES

None reported.

BUGS AND LIMITATIONS

No bugs have been reported.

Please report any bugs or feature requests to bug-leading-zeros@rt.cpan.org, or through the web interface at http://rt.cpan.org.

AUTHOR

Damian Conway <DCONWAY@cpan.org>

LICENCE AND COPYRIGHT

Copyright (c) 2005, Damian Conway <DCONWAY@cpan.org>. All rights reserved.

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

DISCLAIMER OF WARRANTY

BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR, OR CORRECTION.

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENCE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.