2 package Class::MOP::Method::Constructor;
8 use Scalar::Util 'blessed', 'weaken', 'refaddr';
11 use base 'Class::MOP::Method::Inlined';
17 (blessed $options{metaclass} && $options{metaclass}->isa('Class::MOP::Class'))
18 || confess "You must pass a metaclass instance if you want to inline"
19 if $options{is_inline};
21 ($options{package_name} && $options{name})
22 || confess "You must supply the package_name and name parameters $Class::MOP::Method::UPGRADE_ERROR_TEXT";
24 my $self = $class->_new(\%options);
26 # we don't want this creating
27 # a cycle in the code, if not
29 weaken($self->{'associated_metaclass'});
31 $self->_initialize_body;
39 return Class::MOP::Class->initialize($class)->new_object(@_)
40 if $class ne __PACKAGE__;
42 my $params = @_ == 1 ? $_[0] : {@_};
45 # inherited from Class::MOP::Method
46 body => $params->{body},
47 # associated_metaclass => $params->{associated_metaclass}, # overriden
48 package_name => $params->{package_name},
49 name => $params->{name},
50 original_method => $params->{original_method},
52 # inherited from Class::MOP::Generated
53 is_inline => $params->{is_inline} || 0,
54 definition_context => $params->{definition_context},
56 # inherited from Class::MOP::Inlined
57 _expected_method_class => $params->{_expected_method_class},
59 # defined in this subclass
60 options => $params->{options} || {},
61 associated_metaclass => $params->{metaclass},
67 sub options { (shift)->{'options'} }
68 sub associated_metaclass { (shift)->{'associated_metaclass'} }
72 sub _initialize_body {
74 my $method_name = '_generate_constructor_method';
76 $method_name .= '_inline' if $self->is_inline;
78 $self->{'body'} = $self->$method_name;
81 sub _eval_environment {
83 return $self->associated_metaclass->_eval_environment;
86 sub _generate_constructor_method {
87 return sub { Class::MOP::Class->initialize(shift)->new_object(@_) }
90 sub _generate_constructor_method_inline {
93 my $meta = $self->associated_metaclass;
97 $meta->_inline_new_object,
101 warn join("\n", @source) if $self->options->{debug};
105 return $code = bless sub {
106 if (!defined($RuNNeR)) {
108 $self->_compile_code(\@source);
111 my $source = join("\n", @source);
112 confess "Could not eval the constructor :\n\n$source\n\nbecause :\n\n$_";
114 # update the body member unless something else has stomped on it
115 my $body = $self->{'body'};
116 if (refaddr($code) != refaddr($body)) {
117 # we seem to be outdated... paranoid future-proofing, I think..
118 goto $RuNNeR = $body;
120 $self->{'body'} = $RuNNeR;
121 # update the symbol in the stash if it's currently immutable
122 # and it's still the original we set previously.
123 # my $assoc_class = $self->associated_metaclass;
124 # my $sigiled_name = '&'.$self->{'name'};
125 # if ($assoc_class->is_immutable) {
126 # my $stash = $assoc_class->_package_stash;
127 # my $symbol_ref = $stash->get_symbol($sigiled_name);
128 # if (!defined($symbol_ref)) {
129 # confess "A metaobject is corrupted";
131 # if (refaddr($code) != refaddr($symbol_ref)) {
132 # goto $RuNNeR = $symbol_ref;
134 # $stash->add_symbol($sigiled_name, $RuNNeR);
137 return unless defined($_[0]);
144 # ABSTRACT: Method Meta Object for constructors
152 use Class::MOP::Method::Constructor;
154 my $constructor = Class::MOP::Method::Constructor->new(
155 metaclass => $metaclass,
157 debug => 1, # this is all for now
161 # calling the constructor ...
162 $constructor->body->execute($metaclass->name, %params);
166 This is a subclass of C<Class::MOP::Method> which generates
173 =item B<< Class::MOP::Method::Constructor->new(%options) >>
175 This creates a new constructor object. It accepts a hash reference of
182 This should be a L<Class::MOP::Class> object. It is required.
186 The method name (without a package name). This is required.
190 The package name for the method. This is required.
194 This indicates whether or not the constructor should be inlined. This
199 =item B<< $metamethod->is_inline >>
201 Returns a boolean indicating whether or not the constructor is
204 =item B<< $metamethod->associated_metaclass >>
206 This returns the L<Class::MOP::Class> object for the method.