Moose-2.1405HEADMoose-2.1405master

1 files changed, 304 insertions, 0 deletions

diff --git a/lib/Class/MOP/Mixin/HasMethods.pm b/lib/Class/MOP/Mixin/HasMethods.pm
new file mode 100644
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+++ b/lib/Class/MOP/Mixin/HasMethods.pm
@@ -0,0 +1,304 @@
+package Class::MOP::Mixin::HasMethods;
+our $VERSION = '2.1405';
+
+use strict;
+use warnings;
+
+use Class::MOP::Method::Meta;
+
+use Scalar::Util 'blessed', 'reftype';
+use Sub::Name '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);
+
+    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)
+        or return;
+
+    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)
+        or return;
+
+    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 2.1405
+
+=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.little@iinteractive.com>
+
+=item *
+
+Dave Rolsky <autarch@urth.org>
+
+=item *
+
+Jesse Luehrs <doy@tozt.net>
+
+=item *
+
+Shawn M Moore <code@sartak.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@weftsoar.net>
+
+=item *
+
+Chris Prather <chris@prather.org>
+
+=item *
+
+Matt S Trout <mst@shadowcat.co.uk>
+
+=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