use warnings;
use Carp 'confess';
-use Scalar::Util 'blessed', 'weaken', 'looks_like_number';
+use Scalar::Util 'blessed', 'weaken';
+use Try::Tiny;
-our $VERSION = '0.61';
+our $VERSION = '1.12';
+$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
-use base 'Class::MOP::Method::Generated';
+use base 'Class::MOP::Method::Inlined';
sub new {
my $class = shift;
($options{package_name} && $options{name})
|| confess "You must supply the package_name and name parameters $Class::MOP::Method::UPGRADE_ERROR_TEXT";
- my $self = bless {
- # from our superclass
- '&!body' => undef,
- '$!package_name' => $options{package_name},
- '$!name' => $options{name},
- # specific to this subclass
- '%!options' => $options{options} || {},
- '$!associated_metaclass' => $options{metaclass},
- '$!is_inline' => ($options{is_inline} || 0),
- } => $class;
+ my $self = $class->_new(\%options);
# we don't want this creating
# a cycle in the code, if not
# needed
- weaken($self->{'$!associated_metaclass'});
+ weaken($self->{'associated_metaclass'});
- $self->initialize_body;
+ $self->_initialize_body;
return $self;
}
-## accessors
+sub _new {
+ my $class = shift;
-sub options { (shift)->{'%!options'} }
-sub associated_metaclass { (shift)->{'$!associated_metaclass'} }
+ return Class::MOP::Class->initialize($class)->new_object(@_)
+ if $class ne __PACKAGE__;
-## cached values ...
+ my $params = @_ == 1 ? $_[0] : {@_};
-sub meta_instance {
- my $self = shift;
- $self->{'$!meta_instance'} ||= $self->associated_metaclass->get_meta_instance;
+ return bless {
+ # inherited from Class::MOP::Method
+ body => $params->{body},
+ # associated_metaclass => $params->{associated_metaclass}, # overriden
+ package_name => $params->{package_name},
+ name => $params->{name},
+ original_method => $params->{original_method},
+
+ # inherited from Class::MOP::Generated
+ is_inline => $params->{is_inline} || 0,
+ definition_context => $params->{definition_context},
+
+ # inherited from Class::MOP::Inlined
+ _expected_method_class => $params->{_expected_method_class},
+
+ # defined in this subclass
+ options => $params->{options} || {},
+ associated_metaclass => $params->{metaclass},
+ }, $class;
}
-sub attributes {
+## accessors
+
+sub options { (shift)->{'options'} }
+sub associated_metaclass { (shift)->{'associated_metaclass'} }
+
+## cached values ...
+
+sub _attributes {
my $self = shift;
- $self->{'@!attributes'} ||= [ $self->associated_metaclass->compute_all_applicable_attributes ]
+ $self->{'attributes'} ||= [
+ sort { $a->name cmp $b->name }
+ $self->associated_metaclass->get_all_attributes
+ ]
}
## method
-sub initialize_body {
+sub _initialize_body {
my $self = shift;
- my $method_name = 'generate_constructor_method';
+ my $method_name = '_generate_constructor_method';
$method_name .= '_inline' if $self->is_inline;
- $self->{'&!body'} = $self->$method_name;
+ $self->{'body'} = $self->$method_name;
}
-sub generate_constructor_method {
+sub _eval_environment {
+ my $self = shift;
+ my $defaults = [map { $_->default } @{ $self->_attributes }];
+ return {
+ '$defaults' => \$defaults,
+ };
+}
+
+sub _generate_constructor_method {
return sub { Class::MOP::Class->initialize(shift)->new_object(@_) }
}
-sub generate_constructor_method_inline {
+sub _generate_constructor_method_inline {
my $self = shift;
- my $source = 'sub {';
- $source .= "\n" . 'my ($class, %params) = @_;';
-
- $source .= "\n" . 'return Class::MOP::Class->initialize($class)->new_object(%params)';
- $source .= "\n" . ' if $class ne \'' . $self->associated_metaclass->name . '\';';
-
- $source .= "\n" . 'my $instance = ' . $self->meta_instance->inline_create_instance('$class');
- $source .= ";\n" . (join ";\n" => map {
- $self->_generate_slot_initializer($_)
- } 0 .. (@{$self->attributes} - 1));
- $source .= ";\n" . 'return $instance';
- $source .= ";\n" . '}';
- warn $source if $self->options->{debug};
-
- my $code;
- {
- # NOTE:
- # create the nessecary lexicals
- # to be picked up in the eval
- my $attrs = $self->attributes;
-
- $code = eval $source;
- confess "Could not eval the constructor :\n\n$source\n\nbecause :\n\n$@" if $@;
- }
- return $code;
-}
+ my $meta = $self->associated_metaclass;
+
+ my @source = (
+ 'sub {',
+ $meta->_inline_new_object,
+ '}',
+ );
-sub _generate_slot_initializer {
- my $self = shift;
- my $index = shift;
-
- my $attr = $self->attributes->[$index];
-
- my $default;
- if ($attr->has_default) {
- # NOTE:
- # default values can either be CODE refs
- # in which case we need to call them. Or
- # they can be scalars (strings/numbers)
- # in which case we can just deal with them
- # in the code we eval.
- if ($attr->is_default_a_coderef) {
- $default = '$attrs->[' . $index . ']->default($instance)';
- }
- else {
- $default = $attr->default;
- # make sure to quote strings ...
- unless (looks_like_number($default)) {
- $default = "'$default'";
- }
- }
- } elsif( $attr->has_builder ) {
- $default = '$instance->'.$attr->builder;
+ warn join("\n", @source) if $self->options->{debug};
+
+ my $code = try {
+ $self->_compile_code(\@source);
}
+ catch {
+ my $source = join("\n", @source);
+ confess "Could not eval the constructor :\n\n$source\n\nbecause :\n\n$_";
+ };
- if ( defined $attr->init_arg ) {
- return (
- 'if(exists $params{\'' . $attr->init_arg . '\'}){' . "\n" .
- $self->meta_instance->inline_set_slot_value(
- '$instance',
- ("'" . $attr->name . "'"),
- '$params{\'' . $attr->init_arg . '\'}' ) . "\n" .
- '} ' . (!defined $default ? '' : 'else {' . "\n" .
- $self->meta_instance->inline_set_slot_value(
- '$instance',
- ("'" . $attr->name . "'"),
- $default ) . "\n" .
- '}')
- );
- } elsif ( defined $default ) {
- return (
- $self->meta_instance->inline_set_slot_value(
- '$instance',
- ("'" . $attr->name . "'"),
- $default ) . "\n"
- );
- } else { return '' }
+ return $code;
}
1;
);
# calling the constructor ...
- $constructor->body->($metaclass->name, %params);
+ $constructor->body->execute($metaclass->name, %params);
=head1 DESCRIPTION
-This is a subclass of C<Class::MOP::Method> which deals with
-class constructors. This is used when making a class immutable
-to generate an optimized constructor.
+This is a subclass of C<Class::MOP::Method> which generates
+constructor methods.
=head1 METHODS
=over 4
-=item B<new (metaclass => $meta, options => \%options)>
-
-=item B<options>
+=item B<< Class::MOP::Method::Constructor->new(%options) >>
-This returns the options HASH which is passed into C<new>.
+This creates a new constructor object. It accepts a hash reference of
+options.
-=item B<associated_metaclass>
+=over 8
-This returns the metaclass which is passed into C<new>.
+=item * metaclass
-=item B<attributes>
+This should be a L<Class::MOP::Class> object. It is required.
-This returns the list of attributes which are associated with the
-metaclass which is passed into C<new>.
+=item * name
-=item B<meta_instance>
+The method name (without a package name). This is required.
-This returns the meta instance which is associated with the
-metaclass which is passed into C<new>.
+=item * package_name
-=item B<is_inline>
+The package name for the method. This is required.
-This returns a boolean, but since constructors are very rarely
-not inlined, this always returns true for now.
+=item * is_inline
-=item B<initialize_body>
-
-This creates the code reference for the constructor itself.
+This indicates whether or not the constructor should be inlined. This
+defaults to false.
=back
-=head2 Method Generators
+=item B<< $metamethod->is_inline >>
-=over 4
+Returns a boolean indicating whether or not the constructor is
+inlined.
-=item B<generate_constructor_method>
+=item B<< $metamethod->associated_metaclass >>
-=item B<generate_constructor_method_inline>
+This returns the L<Class::MOP::Class> object for the method.
=back
=head1 COPYRIGHT AND LICENSE
-Copyright 2006-2008 by Infinity Interactive, Inc.
+Copyright 2006-2010 by Infinity Interactive, Inc.
L<http://www.iinteractive.com>