package indirect; use 5.008; use strict; use warnings; =head1 NAME indirect - Lexically warn about using the indirect object syntax. =head1 VERSION Version 0.09 =cut our $VERSION; BEGIN { $VERSION = '0.09'; } =head1 SYNOPSIS no indirect; my $x = new Apple 1, 2, 3; # warns { use indirect; my $y = new Pear; # ok } no indirect ':fatal'; if (defied $foo) { ... } # croaks, note the typo =head1 DESCRIPTION When enabled (or disabled as some may prefer to say, since you actually turn it on by calling C), this pragma warns about indirect object syntax constructs that may have slipped into your code. This syntax is now considered harmful, since its parsing has many quirks and its use is error prone (when C isn't defined, C is actually interpreted as C<< $x->sub >>). It currently does not warn when the object is enclosed between braces (like C) or for core functions (C or C). This may change in the future, or may be added as optional features that would be enabled by passing options to C. This module is B a source filter. =head1 METHODS =head2 C Magically called when C is encountered. Turns the module on. If C<@opts> contains C<':fatal'>, the module will croak on the first indirect syntax met. =head2 C Magically called at each C. Turns the module off. =cut BEGIN { require XSLoader; XSLoader::load(__PACKAGE__, $VERSION); } sub import { $^H{indirect} = undef; } sub unimport { (undef, my $type) = @_; $^H |= 0x00020000; $^H{indirect} = (defined $type and $type eq ':fatal') ? 2 : 1; } =head1 DEPENDENCIES L 5.8. L (standard since perl 5.006). =head1 CAVEATS C (no semicolon) at the end of a file won't be seen as an indirect object syntax, although it will as soon as there is another token before the end (as in C or C). With 5.8 perls, the pragma does not propagate into C. This is due to a shortcoming in the way perl handles the hints hash, and is fixed in perl 5.10. =head1 AUTHOR Vincent Pit, C<< >>, L. You can contact me by mail or on C (vincent). =head1 BUGS Please report any bugs or feature requests to C, or through the web interface at L. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes. =head1 SUPPORT You can find documentation for this module with the perldoc command. perldoc indirect Tests code coverage report is available at L. =head1 ACKNOWLEDGEMENTS Bram, for motivation and advices. =head1 COPYRIGHT & LICENSE Copyright 2008 Vincent Pit, all rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. =cut 1; # End of indirect