NAME

Perl6::Builtins - Provide Perl 5 versions of the new Perl 6 builtins

VERSION

This document describes Perl6::Builtins version 0.0.3

SYNOPSIS

  use Perl6::Builtins qw( system );

  system $system_cmd
      or die "Could not $system_cmd: $!";

  my $package = caller->{package};
  my $file    = caller->{file};
  my $line    = caller->{line};

DESCRIPTION

Several of the builtins in Perl 6 have different (i.e. more useful, less confusing) behaviours than their Perl 5 counterparts. This module provides Perl 5 versions of those builtins.

INTERFACE

system

If system is loaded on the use line, the builtin is altered so that it returns true if the system command suceeds. In any other context, the command returns the value in $!.

caller

If caller is loaded on the use line, the builtin is altered so that it behaves as in Perl 5 in scalar and list contexts. However, if the result of a call to caller is used as a hash reference it returns a reference to a hash with the following keys:

'package'

'file'

'line'

'sub'

'args'

'want'

'eval'

'require'

'hints'

'bitmask'

with each of the values for these keys being the equivalent item from the list returned by caller in list context. This is useful because it means that, instead of:

$subname = (caller)[3];

you can write the much more readable:

$subname = caller->{sub};

DIAGNOSTICS

None.

CONFIGURATION AND ENVIRONMENT

Perl6::Builtins requires no configuration files or environment variables.

DEPENDENCIES

This module uses the Contextual::Return module.

INCOMPATIBILITIES

None reported.

BUGS AND LIMITATIONS

No bugs have been reported.

Please report any bugs or feature requests to bug-perl6-builtins@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.