X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FClass%2FMOP%2FMethod%2FConstructor.pm;h=56f38c5c0db4557b43c3f55480a347e26a6fb870;hb=777b1f18dd34d5d656f15d14ce9836cfc9c2978f;hp=aeaa607aeddae2d6a3486f15d25c37a44fd0062d;hpb=0c6f32800dad3cfe10510f2443d2cac4c9a1a76f;p=gitmo%2FClass-MOP.git diff --git a/lib/Class/MOP/Method/Constructor.pm b/lib/Class/MOP/Method/Constructor.pm index aeaa607..56f38c5 100644 --- a/lib/Class/MOP/Method/Constructor.pm +++ b/lib/Class/MOP/Method/Constructor.pm @@ -5,13 +5,14 @@ use strict; use warnings; use Carp 'confess'; -use Scalar::Util 'blessed', 'weaken', 'looks_like_number'; +use Scalar::Util 'blessed', 'weaken'; +use Try::Tiny; -our $VERSION = '0.71_01'; +our $VERSION = '1.11'; $VERSION = eval $VERSION; our $AUTHORITY = 'cpan:STEVAN'; -use base 'Class::MOP::Method::Generated'; +use base 'Class::MOP::Method::Inlined'; sub new { my $class = shift; @@ -31,29 +32,40 @@ sub new { # needed weaken($self->{'associated_metaclass'}); - $self->initialize_body; + $self->_initialize_body; return $self; } sub _new { my $class = shift; - my $options = @_ == 1 ? $_[0] : {@_}; - - 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), + + return Class::MOP::Class->initialize($class)->new_object(@_) + if $class ne __PACKAGE__; + + my $params = @_ == 1 ? $_[0] : {@_}; + + 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 can_be_inlined { 1 } - ## accessors sub options { (shift)->{'options'} } @@ -61,74 +73,117 @@ sub associated_metaclass { (shift)->{'associated_metaclass'} } ## cached values ... -sub meta_instance { +sub _attributes { my $self = shift; - $self->{'meta_instance'} ||= $self->associated_metaclass->get_meta_instance; -} - -sub attributes { - my $self = shift; - $self->{'attributes'} ||= [ $self->associated_metaclass->compute_all_applicable_attributes ] + $self->{'attributes'} ||= [ $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; } -sub generate_constructor_method { +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 $close_over = {}; - - my $source = 'sub {'; - $source .= "\n" . 'my $class = shift;'; - - $source .= "\n" . 'return Class::MOP::Class->initialize($class)->new_object(@_)'; - $source .= "\n" . ' if $class ne \'' . $self->associated_metaclass->name . '\';'; + my $defaults = [map { $_->default } @{ $self->_attributes }]; + my $close_over = { + '$defaults' => \$defaults, + }; + + my $meta = $self->associated_metaclass; + + my $idx = 0; + my @source = ( + 'sub {', + 'my $class = shift;', + 'return Class::MOP::Class->initialize($class)->new_object(@_)', + 'if $class ne \'' . $meta->name . '\';', + 'my $params = @_ == 1 ? $_[0] : {@_};', + 'my $instance = ' . $meta->inline_create_instance('$class') . ';', + (map { $self->_generate_slot_initializer($_, $idx++) } + @{ $self->_attributes }), + $self->_preserve_weak_metaclasses, + 'return $instance', + '}', + ); + + warn join("\n", @source) if $self->options->{debug}; + + my $code = try { + $self->_compile_code( + source => \@source, + environment => $close_over, + ); + } + catch { + my $source = join("\n", @source); + confess "Could not eval the constructor :\n\n$source\n\nbecause :\n\n$_"; + }; - $source .= "\n" . 'my $params = @_ == 1 ? $_[0] : {@_};'; + return $code; +} - $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}; +sub _generate_slot_initializer { + my $self = shift; + my ($attr, $idx) = @_; - my $code; - { - # NOTE: - # create the nessecary lexicals - # to be picked up in the eval + my $default = $self->_generate_default_value($attr, $idx); - $code = $self->_eval_closure( - { '$attrs' => \$self->attributes }, - $source + if (defined(my $init_arg = $attr->init_arg)) { + my @source = ( + 'if (exists $params->{\'' . $init_arg . '\'}) {', + $attr->inline_set( + '$instance', '$params->{\'' . $init_arg . '\'}' + ) . ';', + '}', ); - confess "Could not eval the constructor :\n\n$source\n\nbecause :\n\n$@" if $@; + if (defined $default) { + push @source, ( + 'else {', + $attr->inline_set('$instance', $default) . ';', + '}', + ); + } + return @source; + } + elsif (defined $default) { + return ($attr->inline_set('$instance', $default) . ';'); + } + else { + return (); } - return $code; } -sub _generate_slot_initializer { - my $self = shift; - my $index = shift; +sub _preserve_weak_metaclasses { + my $self = shift; + my $meta = $self->associated_metaclass; + if (Class::MOP::metaclass_is_weak($meta->name)) { + return ( + $meta->_inline_set_mop_slot( + '$instance', 'Class::MOP::class_of($class)' + ) . ';' + ); + } + else { + return (); + } +} - my $attr = $self->attributes->[$index]; +sub _generate_default_value { + my $self = shift; + my ($attr, $index) = @_; - my $default; if ($attr->has_default) { # NOTE: # default values can either be CODE refs @@ -137,41 +192,18 @@ sub _generate_slot_initializer { # 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)'; + return '$defaults->[' . $index . ']->($instance)'; } else { - $default = $attr->default; - # make sure to quote strings ... - unless (looks_like_number($default)) { - $default = "'$default'"; - } + return '$defaults->[' . $index . ']'; } - } elsif( $attr->has_builder ) { - $default = '$instance->'.$attr->builder; } - - 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 . "'"), - $default ) . "\n" - ); - } else { return '' } + elsif ($attr->has_builder) { + return '$instance->' . $attr->builder; + } + else { + return; + } } 1; @@ -200,58 +232,47 @@ Class::MOP::Method::Constructor - Method Meta Object for constructors =head1 DESCRIPTION -This is a subclass of C which deals with -class constructors. This is used when making a class immutable -to generate an optimized constructor. +This is a subclass of C which generates +constructor methods. =head1 METHODS =over 4 -=item B $meta, options => \%options)> +=item B<< Class::MOP::Method::Constructor->new(%options) >> -=item B +This creates a new constructor object. It accepts a hash reference of +options. -This returns the options HASH which is passed into C. +=over 8 -=item B +=item * metaclass -This returns the metaclass which is passed into C. +This should be a L object. It is required. -=item B +=item * name -This returns the list of attributes which are associated with the -metaclass which is passed into C. +The method name (without a package name). This is required. -=item B +=item * package_name -This returns the meta instance which is associated with the -metaclass which is passed into C. +The package name for the method. This is required. -=item B +=item * is_inline -This returns a boolean, but since constructors are very rarely -not inlined, this always returns true for now. - -=item B - -This method always returns true in this class. It exists so that -subclasses (like in Moose) can override and do some sort of checking -to determine whether or not inlining the constructor is safe. - -=item B - -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 +=item B<< $metamethod->associated_metaclass >> -=item B +This returns the L object for the method. =back @@ -261,7 +282,7 @@ Stevan Little Estevan@iinteractive.comE =head1 COPYRIGHT AND LICENSE -Copyright 2006-2008 by Infinity Interactive, Inc. +Copyright 2006-2010 by Infinity Interactive, Inc. L