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package Class::MOP::Method::Meta; our $VERSION = '2.2203'; 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 $self->SUPER::_make_compatible_with(@_); } 1; # ABSTRACT: Method Meta Object for C<meta> methods __END__ =pod =encoding UTF-8 =head1 NAME Class::MOP::Method::Meta - Method Meta Object for C<meta> methods =head1 VERSION version 2.2203 =head1 DESCRIPTION This is a L<Class::MOP::Method> subclass which represents C<meta> methods installed into classes by Class::MOP. =head1 METHODS =over 4 =item B<< Class::MOP::Method::Wrapped->wrap($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