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package MooseX::Mangle;
use Moose ();
use Moose::Exporter;
=head1 NAME
MooseX::Mangle - mangle the argument list or return values of your methods
=head1 SYNOPSIS
package Foo;
use Moose;
sub foo { "FOO" }
sub bar { shift; join '-', @_ }
package Foo::Sub;
use Moose;
use MooseX::Mangle;
extends 'Foo';
mangle_return foo => sub {
my $self = shift;
my ($foo) = @_;
return lc($foo) . 'BAR';
};
mangle_args bar => sub {
my $self = shift;
my ($a, $b, $c) = @_;
return ($b, $c, $a);
};
my $foo = Foo::Sub->new->foo # 'fooBAR'
my $bar = Foo::Sub->new->bar(qw(a b c)) # 'b-c-a'
=head1 DESCRIPTION
C<MooseX::Mangle> provides some simple sugar for common usages of C<around>.
Oftentimes all that is needed is to adjust the argument list or returned values
of a method, but using C<around> directly for this can be tedious. This module
exports two subroutines which make this a bit easier.
=cut
=head1 EXPORTS
=cut
=head2 mangle_args METHOD_NAME CODE
Applies an C<around> method modifier to METHOD_NAME, using CODE to mangle the
argument list. CODE is called as a method, and additionally receives the
arguments passed to the method; it should return the list of arguments to
actually pass to the method.
=cut
sub mangle_args {
my $caller = shift;
my ($method_name, $code) = @_;
my $meta = Class::MOP::class_of($caller);
$meta->add_around_method_modifier($method_name => sub {
my $orig = shift;
my $self = shift;
my @args = $self->$code(@_);
return $self->$orig(@args);
});
}
=head2 mangle_return METHOD_NAME CODE
Applies an C<around> method modifier to METHOD_NAME, using CODE to mangle the
returned values. CODE is called as a method, and additionally receives the
values returned by the method; it should return the list of values to actually
return.
=cut
sub mangle_return {
my $caller = shift;
my ($method_name, $code) = @_;
my $meta = Class::MOP::class_of($caller);
$meta->add_around_method_modifier($method_name => sub {
my $orig = shift;
my $self = shift;
if (wantarray) {
my @ret = $self->$orig(@_);
return $self->$code(@ret);
}
else {
my $ret = $self->$orig(@_);
return $self->$code($ret);
}
});
}
Moose::Exporter->setup_import_methods(
with_caller => [qw(mangle_args mangle_return)],
);
=head1 BUGS
No known bugs.
Please report any bugs through RT: email
C<bug-moosex-mangle at rt.cpan.org>, or browse to
L<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=MooseX-Mangle>.
=head1 SEE ALSO
L<Moose>
=head1 SUPPORT
You can find this documentation for this module with the perldoc command.
perldoc MooseX::Mangle
You can also look for information at:
=over 4
=item * AnnoCPAN: Annotated CPAN documentation
L<http://annocpan.org/dist/MooseX-Mangle>
=item * CPAN Ratings
L<http://cpanratings.perl.org/d/MooseX-Mangle>
=item * RT: CPAN's request tracker
L<http://rt.cpan.org/NoAuth/Bugs.html?Dist=MooseX-Mangle>
=item * Search CPAN
L<http://search.cpan.org/dist/MooseX-Mangle>
=back
=head1 AUTHOR
Jesse Luehrs <doy at tozt dot net>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2009 by Jesse Luehrs.
This is free software; you can redistribute it and/or modify it under
the same terms as perl itself.
=cut
1;
|
