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package Class::MOP::Mixin::HasMethods; our $VERSION = '2.2203'; use strict; use warnings; use Class::MOP::Method::Meta; use Scalar::Util 'blessed', 'reftype'; use Sub::Util 1.40 'set_subname'; use parent 'Class::MOP::Mixin'; sub _meta_method_class { 'Class::MOP::Method::Meta' } sub _add_meta_method { my $self = shift; my ($name) = @_; my $existing_method = $self->can('find_method_by_name') ? $self->find_method_by_name($name) : $self->get_method($name); return if $existing_method && $existing_method->isa($self->_meta_method_class); $self->add_method( $name => $self->_meta_method_class->wrap( name => $name, package_name => $self->name, associated_metaclass => $self, ) ); } sub wrap_method_body { my ( $self, %args ) = @_; ( $args{body} && 'CODE' eq reftype $args{body} ) || $self->_throw_exception( CodeBlockMustBeACodeRef => instance => $self, params => \%args ); $self->method_metaclass->wrap( package_name => $self->name, %args, ); } sub add_method { my ( $self, $method_name, $method ) = @_; ( defined $method_name && length $method_name ) || $self->_throw_exception( MustDefineAMethodName => instance => $self ); my $package_name = $self->name; my $body; if ( blessed($method) && $method->isa('Class::MOP::Method') ) { $body = $method->body; if ( $method->package_name ne $package_name ) { $method = $method->clone( package_name => $package_name, name => $method_name, ); } $method->attach_to_class($self); } else { # If a raw code reference is supplied, its method object is not created. # The method object won't be created until required. $body = $method; } $self->_method_map->{$method_name} = $method; my ($current_package, $current_name) = Class::MOP::get_code_info($body); set_subname($package_name . '::' . $method_name, $body) unless defined $current_name && $current_name !~ /^__ANON__/; $self->add_package_symbol("&$method_name", $body); # we added the method to the method map too, so it's still valid $self->update_package_cache_flag; } sub _code_is_mine { my ( $self, $code ) = @_; my ( $code_package, $code_name ) = Class::MOP::get_code_info($code); return ( $code_package && $code_package eq $self->name ) || ( $code_package eq 'constant' && $code_name eq '__ANON__' ); } sub has_method { my ( $self, $method_name ) = @_; ( defined $method_name && length $method_name ) || $self->_throw_exception( MustDefineAMethodName => instance => $self ); my $method = $self->_get_maybe_raw_method($method_name); return if not $method; return defined($self->_method_map->{$method_name} = $method); } sub get_method { my ( $self, $method_name ) = @_; ( defined $method_name && length $method_name ) || $self->_throw_exception( MustDefineAMethodName => instance => $self ); my $method = $self->_get_maybe_raw_method($method_name); return if not $method; return $method if blessed($method) && $method->isa('Class::MOP::Method'); return $self->_method_map->{$method_name} = $self->wrap_method_body( body => $method, name => $method_name, associated_metaclass => $self, ); } sub _get_maybe_raw_method { my ( $self, $method_name ) = @_; my $map_entry = $self->_method_map->{$method_name}; return $map_entry if defined $map_entry; my $code = $self->get_package_symbol("&$method_name"); return unless $code && $self->_code_is_mine($code); return $code; } sub remove_method { my ( $self, $method_name ) = @_; ( defined $method_name && length $method_name ) || $self->_throw_exception( MustDefineAMethodName => instance => $self ); my $removed_method = delete $self->_method_map->{$method_name}; $self->remove_package_symbol("&$method_name"); $removed_method->detach_from_class if blessed($removed_method) && $removed_method->isa('Class::MOP::Method'); # still valid, since we just removed the method from the map $self->update_package_cache_flag; return $removed_method; } sub get_method_list { my $self = shift; return keys %{ $self->_full_method_map }; } sub _get_local_methods { my $self = shift; return values %{ $self->_full_method_map }; } sub _restore_metamethods_from { my $self = shift; my ($old_meta) = @_; my $package_name = $self->name; # Check if Perl debugger is enabled my $debugger_enabled = ($^P & 0x10); my $debug_method_info; for my $method ($old_meta->_get_local_methods) { my $method_name = $method->name; # Track DB::sub information for this method if debugger is enabled. # This contains original method filename and line numbers. $debug_method_info = ''; if ($debugger_enabled) { $debug_method_info = $DB::sub{$package_name . "::" . $method_name} } $method->_make_compatible_with($self->method_metaclass); $self->add_method($method_name => $method); # Restore method debug information, which can be clobbered by add_method. # Note that we handle this here instead of in add_method, because we # only want to preserve the original debug info in cases where we are # restoring a method, not overwriting a method. if ($debugger_enabled && $debug_method_info) { $DB::sub{$package_name . "::" . $method_name} = $debug_method_info; } } } sub reset_package_cache_flag { (shift)->{'_package_cache_flag'} = undef } sub update_package_cache_flag { my $self = shift; # NOTE: # we can manually update the cache number # since we are actually adding the method # to our cache as well. This avoids us # having to regenerate the method_map. # - SL $self->{'_package_cache_flag'} = Class::MOP::check_package_cache_flag($self->name); } sub _full_method_map { my $self = shift; my $pkg_gen = Class::MOP::check_package_cache_flag($self->name); if (($self->{_package_cache_flag_full} || -1) != $pkg_gen) { # forcibly reify all method map entries $self->get_method($_) for $self->list_all_package_symbols('CODE'); $self->{_package_cache_flag_full} = $pkg_gen; } return $self->_method_map; } 1; # ABSTRACT: Methods for metaclasses which have methods __END__ =pod =encoding UTF-8 =head1 NAME Class::MOP::Mixin::HasMethods - Methods for metaclasses which have methods =head1 VERSION version 2.2203 =head1 DESCRIPTION This class implements methods for metaclasses which have methods (L<Class::MOP::Class> and L<Moose::Meta::Role>). See L<Class::MOP::Class> for API details. =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