170 lines
4.1 KiB
Perl
170 lines
4.1 KiB
Perl
package Class::MOP::Method::Meta;
|
|
our $VERSION = '2.2014';
|
|
|
|
use strict;
|
|
use warnings;
|
|
|
|
use Carp 'confess';
|
|
use Scalar::Util 'blessed', 'weaken';
|
|
|
|
use constant DEBUG_NO_META => $ENV{DEBUG_NO_META} ? 1 : 0;
|
|
|
|
use parent 'Class::MOP::Method';
|
|
|
|
sub _is_caller_mop_internal {
|
|
my $self = shift;
|
|
my ($caller) = @_;
|
|
return $caller =~ /^(?:Class::MOP|metaclass)(?:::|$)/;
|
|
}
|
|
|
|
sub _generate_meta_method {
|
|
my $method_self = shift;
|
|
my $metaclass = shift;
|
|
weaken($metaclass);
|
|
|
|
sub {
|
|
# this will be compiled out if the env var wasn't set
|
|
if (DEBUG_NO_META) {
|
|
confess "'meta' method called by MOP internals"
|
|
# it's okay to call meta methods on metaclasses, since we
|
|
# explicitly ask for them
|
|
if !$_[0]->isa('Class::MOP::Object')
|
|
&& !$_[0]->isa('Class::MOP::Mixin')
|
|
# it's okay if the test itself calls ->meta, we only care about
|
|
# if the mop internals call ->meta
|
|
&& $method_self->_is_caller_mop_internal(scalar caller);
|
|
}
|
|
# we must re-initialize so that it
|
|
# works as expected in subclasses,
|
|
# since metaclass instances are
|
|
# singletons, this is not really a
|
|
# big deal anyway.
|
|
$metaclass->initialize(blessed($_[0]) || $_[0])
|
|
};
|
|
}
|
|
|
|
sub wrap {
|
|
my ($class, @args) = @_;
|
|
|
|
unshift @args, 'body' if @args % 2 == 1;
|
|
my %params = @args;
|
|
$class->_throw_exception( CannotOverrideBodyOfMetaMethods => params => \%params,
|
|
class => $class
|
|
)
|
|
if $params{body};
|
|
|
|
my $metaclass_class = $params{associated_metaclass}->meta;
|
|
$params{body} = $class->_generate_meta_method($metaclass_class);
|
|
return $class->SUPER::wrap(%params);
|
|
}
|
|
|
|
sub _make_compatible_with {
|
|
my $self = shift;
|
|
my ($other) = @_;
|
|
|
|
# XXX: this is pretty gross. the issue here is that CMOP::Method::Meta
|
|
# objects are subclasses of CMOP::Method, but when we get to moose, they'll
|
|
# need to be compatible with Moose::Meta::Method, which isn't possible. the
|
|
# right solution here is to make ::Meta into a role that gets applied to
|
|
# whatever the method_metaclass happens to be and get rid of
|
|
# _meta_method_metaclass entirely, but that's not going to happen until
|
|
# we ditch cmop and get roles into the bootstrapping, so. i'm not
|
|
# maintaining the previous behavior of turning them into instances of the
|
|
# new method_metaclass because that's equally broken, and at least this way
|
|
# any issues will at least be detectable and potentially fixable. -doy
|
|
return $self unless $other->_is_compatible_with($self->_real_ref_name);
|
|
|
|
return $self->SUPER::_make_compatible_with(@_);
|
|
}
|
|
|
|
1;
|
|
|
|
# ABSTRACT: Method Meta Object for C<meta> methods
|
|
|
|
__END__
|
|
|
|
=pod
|
|
|
|
=encoding UTF-8
|
|
|
|
=head1 NAME
|
|
|
|
Class::MOP::Method::Meta - Method Meta Object for C<meta> methods
|
|
|
|
=head1 VERSION
|
|
|
|
version 2.2014
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
This is a L<Class::MOP::Method> subclass which represents C<meta>
|
|
methods installed into classes by Class::MOP.
|
|
|
|
=head1 METHODS
|
|
|
|
=over 4
|
|
|
|
=item B<< Class::MOP::Method::Wrapped->wrap($metamethod, %options) >>
|
|
|
|
This is the constructor. It accepts a L<Class::MOP::Method> object and
|
|
a hash of options. The options accepted are identical to the ones
|
|
accepted by L<Class::MOP::Method>, except that C<body> cannot be passed
|
|
(it will be generated automatically).
|
|
|
|
=back
|
|
|
|
=head1 AUTHORS
|
|
|
|
=over 4
|
|
|
|
=item *
|
|
|
|
Stevan Little <stevan@cpan.org>
|
|
|
|
=item *
|
|
|
|
Dave Rolsky <autarch@urth.org>
|
|
|
|
=item *
|
|
|
|
Jesse Luehrs <doy@cpan.org>
|
|
|
|
=item *
|
|
|
|
Shawn M Moore <sartak@cpan.org>
|
|
|
|
=item *
|
|
|
|
יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org>
|
|
|
|
=item *
|
|
|
|
Karen Etheridge <ether@cpan.org>
|
|
|
|
=item *
|
|
|
|
Florian Ragwitz <rafl@debian.org>
|
|
|
|
=item *
|
|
|
|
Hans Dieter Pearcey <hdp@cpan.org>
|
|
|
|
=item *
|
|
|
|
Chris Prather <chris@prather.org>
|
|
|
|
=item *
|
|
|
|
Matt S Trout <mstrout@cpan.org>
|
|
|
|
=back
|
|
|
|
=head1 COPYRIGHT AND LICENSE
|
|
|
|
This software is copyright (c) 2006 by Infinity Interactive, Inc.
|
|
|
|
This is free software; you can redistribute it and/or modify it under
|
|
the same terms as the Perl 5 programming language system itself.
|
|
|
|
=cut
|