use strict;
use warnings;
+use B ();
+use Class::Load qw(is_class_loaded load_class);
use Scalar::Util 'blessed', 'weaken';
use List::MoreUtils 'any';
use Try::Tiny;
use overload ();
-our $VERSION = '1.03';
-our $AUTHORITY = 'cpan:STEVAN';
-
+use Moose::Deprecated;
use Moose::Meta::Method::Accessor;
use Moose::Meta::Method::Delegation;
use Moose::Util ();
use Moose::Util::TypeConstraints ();
+use Class::MOP::MiniTrait;
use base 'Class::MOP::Attribute', 'Moose::Meta::Mixin::AttributeCore';
+Class::MOP::MiniTrait::apply(__PACKAGE__, 'Moose::Meta::Object::Trait');
+
__PACKAGE__->meta->add_attribute('traits' => (
reader => 'applied_traits',
predicate => 'has_applied_traits',
+ Class::MOP::_definition_context(),
));
# we need to have a ->does method in here to
return $self->Moose::Object::does($name);
}
+sub _error_thrower {
+ my $self = shift;
+ require Moose::Meta::Class;
+ ( ref $self && $self->associated_class ) || "Moose::Meta::Class";
+}
+
sub throw_error {
my $self = shift;
- my $class = ( ref $self && $self->associated_class ) || "Moose::Meta::Class";
+ my $inv = $self->_error_thrower;
unshift @_, "message" if @_ % 2 == 1;
unshift @_, attr => $self if ref $self;
- unshift @_, $class;
- my $handler = $class->can("throw_error"); # to avoid incrementing depth by 1
+ unshift @_, $inv;
+ my $handler = $inv->can("throw_error"); # to avoid incrementing depth by 1
goto $handler;
}
+sub _inline_throw_error {
+ my ( $self, $msg, $args ) = @_;
+
+ my $inv = $self->_error_thrower;
+ # XXX ugh
+ $inv = 'Moose::Meta::Class' unless $inv->can('_inline_throw_error');
+
+ # XXX ugh ugh UGH
+ my $class = $self->associated_class;
+ if ($class) {
+ my $class_name = B::perlstring($class->name);
+ my $attr_name = B::perlstring($self->name);
+ $args = 'attr => Class::MOP::class_of(' . $class_name . ')'
+ . '->find_attribute_by_name(' . $attr_name . '), '
+ . (defined $args ? $args : '');
+ }
+
+ return $inv->_inline_throw_error($msg, $args)
+}
+
sub new {
my ($class, $name, %options) = @_;
$class->_process_options($name, \%options) unless $options{__hack_no_process_options}; # used from clone()... YECHKKK FIXME ICKY YUCK GROSS
-
+
delete $options{__hack_no_process_options};
my %attrs =
if (my $traits = $options->{traits}) {
my $i = 0;
+ my $has_foreign_options = 0;
+
while ($i < @$traits) {
my $trait = $traits->[$i++];
next if ref($trait); # options to a trait we discarded
push @traits, $trait;
# are there options?
- push @traits, $traits->[$i++]
- if $traits->[$i] && ref($traits->[$i]);
+ if ($traits->[$i] && ref($traits->[$i])) {
+ $has_foreign_options = 1
+ if any { $_ ne '-alias' && $_ ne '-excludes' } keys %{ $traits->[$i] };
+
+ push @traits, $traits->[$i++];
+ }
}
if (@traits) {
- my $anon_class = Moose::Meta::Class->create_anon_class(
+ my %options = (
superclasses => [ $class ],
roles => [ @traits ],
- cache => 1,
);
+ if ($has_foreign_options) {
+ $options{weaken} = 0;
+ }
+ else {
+ $options{cache} = 1;
+ }
+
+ my $anon_class = Moose::Meta::Class->create_anon_class(%options);
$class = $anon_class->name;
}
}
# ...
-my @legal_options_for_inheritance = qw(
- default coerce required
- documentation lazy handles
- builder type_constraint
- definition_context
- lazy_build weak_ref
-);
-
-sub legal_options_for_inheritance { @legal_options_for_inheritance }
+# method-generating options shouldn't be overridden
+sub illegal_options_for_inheritance {
+ qw(reader writer accessor clearer predicate)
+}
# NOTE/TODO
# This method *must* be able to handle
sub clone_and_inherit_options {
my ($self, %options) = @_;
- my %copy = %options;
-
- my %actual_options;
-
# NOTE:
# we may want to extends a Class::MOP::Attribute
# in which case we need to be able to use the
# been here. But we allows Moose::Meta::Attribute
# instances to changes them.
# - SL
- my @legal_options = $self->can('legal_options_for_inheritance')
- ? $self->legal_options_for_inheritance
- : @legal_options_for_inheritance;
-
- foreach my $legal_option (@legal_options) {
- if (exists $options{$legal_option}) {
- $actual_options{$legal_option} = $options{$legal_option};
- delete $options{$legal_option};
- }
- }
+ my @illegal_options = $self->can('illegal_options_for_inheritance')
+ ? $self->illegal_options_for_inheritance
+ : ();
+
+ my @found_illegal_options = grep { exists $options{$_} && exists $self->{$_} ? $_ : undef } @illegal_options;
+ (scalar @found_illegal_options == 0)
+ || $self->throw_error("Illegal inherited options => (" . (join ', ' => @found_illegal_options) . ")", data => \%options);
if ($options{isa}) {
my $type_constraint;
$type_constraint = $options{isa};
}
else {
- $type_constraint = Moose::Util::TypeConstraints::find_or_create_isa_type_constraint($options{isa});
+ $type_constraint = Moose::Util::TypeConstraints::find_or_create_isa_type_constraint($options{isa}, { package_defined_in => $options{definition_context}->{package} });
(defined $type_constraint)
|| $self->throw_error("Could not find the type constraint '" . $options{isa} . "'", data => $options{isa});
}
- $actual_options{type_constraint} = $type_constraint;
- delete $options{isa};
+ $options{type_constraint} = $type_constraint;
}
if ($options{does}) {
$type_constraint = $options{does};
}
else {
- $type_constraint = Moose::Util::TypeConstraints::find_or_create_does_type_constraint($options{does});
+ $type_constraint = Moose::Util::TypeConstraints::find_or_create_does_type_constraint($options{does}, { package_defined_in => $options{definition_context}->{package} });
(defined $type_constraint)
|| $self->throw_error("Could not find the type constraint '" . $options{does} . "'", data => $options{does});
}
- $actual_options{type_constraint} = $type_constraint;
- delete $options{does};
+ $options{type_constraint} = $type_constraint;
}
# NOTE:
# so we can ignore it for them.
# - SL
if ($self->can('interpolate_class')) {
- ( $actual_options{metaclass}, my @traits ) = $self->interpolate_class(\%options);
+ ( $options{metaclass}, my @traits ) = $self->interpolate_class(\%options);
my %seen;
my @all_traits = grep { $seen{$_}++ } @{ $self->applied_traits || [] }, @traits;
- $actual_options{traits} = \@all_traits if @all_traits;
-
- delete @options{qw(metaclass traits)};
+ $options{traits} = \@all_traits if @all_traits;
}
- (scalar keys %options == 0)
- || $self->throw_error("Illegal inherited options => (" . (join ', ' => keys %options) . ")", data => \%options);
+ # This method can be called on a CMOP::Attribute object, so we need to
+ # make sure we can call this method.
+ $self->_process_lazy_build_option( $self->name, \%options )
+ if $self->can('_process_lazy_build_option');
-
- $self->clone(%actual_options);
+ $self->clone(%options);
}
sub clone {
}
sub _process_options {
- my ($class, $name, $options) = @_;
+ my ( $class, $name, $options ) = @_;
+
+ $class->_process_is_option( $name, $options );
+ $class->_process_isa_option( $name, $options );
+ $class->_process_does_option( $name, $options );
+ $class->_process_coerce_option( $name, $options );
+ $class->_process_trigger_option( $name, $options );
+ $class->_process_auto_deref_option( $name, $options );
+ $class->_process_lazy_build_option( $name, $options );
+ $class->_process_lazy_option( $name, $options );
+ $class->_process_required_option( $name, $options );
+}
+
+sub _process_is_option {
+ my ( $class, $name, $options ) = @_;
- if (exists $options->{is}) {
+ return unless $options->{is};
- ### -------------------------
- ## is => ro, writer => _foo # turns into (reader => foo, writer => _foo) as before
- ## is => rw, writer => _foo # turns into (reader => foo, writer => _foo)
- ## is => rw, accessor => _foo # turns into (accessor => _foo)
- ## is => ro, accessor => _foo # error, accesor is rw
- ### -------------------------
+ ### -------------------------
+ ## is => ro, writer => _foo # turns into (reader => foo, writer => _foo) as before
+ ## is => rw, writer => _foo # turns into (reader => foo, writer => _foo)
+ ## is => rw, accessor => _foo # turns into (accessor => _foo)
+ ## is => ro, accessor => _foo # error, accesor is rw
+ ### -------------------------
- if ($options->{is} eq 'ro') {
- $class->throw_error("Cannot define an accessor name on a read-only attribute, accessors are read/write", data => $options)
- if exists $options->{accessor};
+ if ( $options->{is} eq 'ro' ) {
+ $class->throw_error(
+ "Cannot define an accessor name on a read-only attribute, accessors are read/write",
+ data => $options )
+ if exists $options->{accessor};
+ $options->{reader} ||= $name;
+ }
+ elsif ( $options->{is} eq 'rw' ) {
+ if ( $options->{writer} ) {
$options->{reader} ||= $name;
}
- elsif ($options->{is} eq 'rw') {
- if ($options->{writer}) {
- $options->{reader} ||= $name;
- }
- else {
- $options->{accessor} ||= $name;
- }
- }
- elsif ($options->{is} eq 'bare') {
- # do nothing, but don't complain (later) about missing methods
- }
else {
- $class->throw_error("I do not understand this option (is => " . $options->{is} . ") on attribute ($name)", data => $options->{is});
+ $options->{accessor} ||= $name;
}
}
+ elsif ( $options->{is} eq 'bare' ) {
+ return;
+ # do nothing, but don't complain (later) about missing methods
+ }
+ else {
+ $class->throw_error( "I do not understand this option (is => "
+ . $options->{is}
+ . ") on attribute ($name)", data => $options->{is} );
+ }
+}
- if (exists $options->{isa}) {
- if (exists $options->{does}) {
- if (try { $options->{isa}->can('does') }) {
- ($options->{isa}->does($options->{does}))
- || $class->throw_error("Cannot have an isa option and a does option if the isa does not do the does on attribute ($name)", data => $options);
- }
- else {
- $class->throw_error("Cannot have an isa option which cannot ->does() on attribute ($name)", data => $options);
- }
- }
+sub _process_isa_option {
+ my ( $class, $name, $options ) = @_;
- # allow for anon-subtypes here ...
- if (blessed($options->{isa}) && $options->{isa}->isa('Moose::Meta::TypeConstraint')) {
- $options->{type_constraint} = $options->{isa};
- }
- else {
- $options->{type_constraint} = Moose::Util::TypeConstraints::find_or_create_isa_type_constraint($options->{isa});
- }
- }
- elsif (exists $options->{does}) {
- # allow for anon-subtypes here ...
- if (blessed($options->{does}) && $options->{does}->isa('Moose::Meta::TypeConstraint')) {
- $options->{type_constraint} = $options->{does};
+ return unless exists $options->{isa};
+
+ if ( exists $options->{does} ) {
+ if ( try { $options->{isa}->can('does') } ) {
+ ( $options->{isa}->does( $options->{does} ) )
+ || $class->throw_error(
+ "Cannot have an isa option and a does option if the isa does not do the does on attribute ($name)",
+ data => $options );
}
else {
- $options->{type_constraint} = Moose::Util::TypeConstraints::find_or_create_does_type_constraint($options->{does});
+ $class->throw_error(
+ "Cannot have an isa option which cannot ->does() on attribute ($name)",
+ data => $options );
}
}
- if (exists $options->{coerce} && $options->{coerce}) {
- (exists $options->{type_constraint})
- || $class->throw_error("You cannot have coercion without specifying a type constraint on attribute ($name)", data => $options);
- $class->throw_error("You cannot have a weak reference to a coerced value on attribute ($name)", data => $options)
- if $options->{weak_ref};
+ # allow for anon-subtypes here ...
+ if ( blessed( $options->{isa} )
+ && $options->{isa}->isa('Moose::Meta::TypeConstraint') ) {
+ $options->{type_constraint} = $options->{isa};
}
-
- if (exists $options->{trigger}) {
- ('CODE' eq ref $options->{trigger})
- || $class->throw_error("Trigger must be a CODE ref on attribute ($name)", data => $options->{trigger});
+ else {
+ $options->{type_constraint}
+ = Moose::Util::TypeConstraints::find_or_create_isa_type_constraint(
+ $options->{isa},
+ { package_defined_in => $options->{definition_context}->{package} }
+ );
}
+}
- if (exists $options->{auto_deref} && $options->{auto_deref}) {
- (exists $options->{type_constraint})
- || $class->throw_error("You cannot auto-dereference without specifying a type constraint on attribute ($name)", data => $options);
- ($options->{type_constraint}->is_a_type_of('ArrayRef') ||
- $options->{type_constraint}->is_a_type_of('HashRef'))
- || $class->throw_error("You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute ($name)", data => $options);
- }
+sub _process_does_option {
+ my ( $class, $name, $options ) = @_;
- if (exists $options->{lazy_build} && $options->{lazy_build} == 1) {
- $class->throw_error("You can not use lazy_build and default for the same attribute ($name)", data => $options)
- if exists $options->{default};
- $options->{lazy} = 1;
- $options->{builder} ||= "_build_${name}";
- if ($name =~ /^_/) {
- $options->{clearer} ||= "_clear${name}";
- $options->{predicate} ||= "_has${name}";
- }
- else {
- $options->{clearer} ||= "clear_${name}";
- $options->{predicate} ||= "has_${name}";
- }
+ return unless exists $options->{does} && ! exists $options->{isa};
+
+ # allow for anon-subtypes here ...
+ if ( blessed( $options->{does} )
+ && $options->{does}->isa('Moose::Meta::TypeConstraint') ) {
+ $options->{type_constraint} = $options->{does};
+ }
+ else {
+ $options->{type_constraint}
+ = Moose::Util::TypeConstraints::find_or_create_does_type_constraint(
+ $options->{does},
+ { package_defined_in => $options->{definition_context}->{package} }
+ );
}
+}
+
+sub _process_coerce_option {
+ my ( $class, $name, $options ) = @_;
+
+ return unless $options->{coerce};
+
+ ( exists $options->{type_constraint} )
+ || $class->throw_error(
+ "You cannot have coercion without specifying a type constraint on attribute ($name)",
+ data => $options );
+
+ $class->throw_error(
+ "You cannot have a weak reference to a coerced value on attribute ($name)",
+ data => $options )
+ if $options->{weak_ref};
- if (exists $options->{lazy} && $options->{lazy}) {
- (exists $options->{default} || defined $options->{builder} )
- || $class->throw_error("You cannot have lazy attribute ($name) without specifying a default value for it", data => $options);
+ unless ( $options->{type_constraint}->has_coercion ) {
+ my $type = $options->{type_constraint}->name;
+
+ Moose::Deprecated::deprecated(
+ feature => 'coerce without coercion',
+ message =>
+ "You cannot coerce an attribute ($name) unless its type ($type) has a coercion"
+ );
}
+}
+
+sub _process_trigger_option {
+ my ( $class, $name, $options ) = @_;
+
+ return unless exists $options->{trigger};
+
+ ( 'CODE' eq ref $options->{trigger} )
+ || $class->throw_error("Trigger must be a CODE ref on attribute ($name)", data => $options->{trigger});
+}
+
+sub _process_auto_deref_option {
+ my ( $class, $name, $options ) = @_;
+
+ return unless $options->{auto_deref};
+
+ ( exists $options->{type_constraint} )
+ || $class->throw_error(
+ "You cannot auto-dereference without specifying a type constraint on attribute ($name)",
+ data => $options );
+
+ ( $options->{type_constraint}->is_a_type_of('ArrayRef')
+ || $options->{type_constraint}->is_a_type_of('HashRef') )
+ || $class->throw_error(
+ "You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute ($name)",
+ data => $options );
+}
+
+sub _process_lazy_build_option {
+ my ( $class, $name, $options ) = @_;
+
+ return unless $options->{lazy_build};
- if ( $options->{required} && !( ( !exists $options->{init_arg} || defined $options->{init_arg} ) || exists $options->{default} || defined $options->{builder} ) ) {
- $class->throw_error("You cannot have a required attribute ($name) without a default, builder, or an init_arg", data => $options);
+ $class->throw_error(
+ "You can not use lazy_build and default for the same attribute ($name)",
+ data => $options )
+ if exists $options->{default};
+
+ $options->{lazy} = 1;
+ $options->{builder} ||= "_build_${name}";
+
+ if ( $name =~ /^_/ ) {
+ $options->{clearer} ||= "_clear${name}";
+ $options->{predicate} ||= "_has${name}";
}
+ else {
+ $options->{clearer} ||= "clear_${name}";
+ $options->{predicate} ||= "has_${name}";
+ }
+}
+
+sub _process_lazy_option {
+ my ( $class, $name, $options ) = @_;
+
+ return unless $options->{lazy};
+
+ ( exists $options->{default} || defined $options->{builder} )
+ || $class->throw_error(
+ "You cannot have a lazy attribute ($name) without specifying a default value for it",
+ data => $options );
+}
+
+sub _process_required_option {
+ my ( $class, $name, $options ) = @_;
+ if (
+ $options->{required}
+ && !(
+ ( !exists $options->{init_arg} || defined $options->{init_arg} )
+ || exists $options->{default}
+ || defined $options->{builder}
+ )
+ ) {
+ $class->throw_error(
+ "You cannot have a required attribute ($name) without a default, builder, or an init_arg",
+ data => $options );
+ }
}
sub initialize_instance_slot {
## Slot management
-# FIXME:
-# this duplicates too much code from
-# Class::MOP::Attribute, we need to
-# refactor these bits eventually.
-# - SL
-sub _set_initial_slot_value {
- my ($self, $meta_instance, $instance, $value) = @_;
-
- my $slot_name = $self->name;
-
- return $meta_instance->set_slot_value($instance, $slot_name, $value)
- unless $self->has_initializer;
-
- my ($type_constraint, $can_coerce);
- if ($self->has_type_constraint) {
- $type_constraint = $self->type_constraint;
- $can_coerce = ($self->should_coerce && $type_constraint->has_coercion);
- }
-
- my $callback = sub {
- my $val = $self->_coerce_and_verify( shift, $instance );;
-
- $meta_instance->set_slot_value($instance, $slot_name, $val);
+sub _make_initializer_writer_callback {
+ my $self = shift;
+ my ($meta_instance, $instance, $slot_name) = @_;
+ my $old_callback = $self->SUPER::_make_initializer_writer_callback(@_);
+ return sub {
+ $old_callback->($self->_coerce_and_verify($_[0], $instance));
};
-
- my $initializer = $self->initializer;
-
- # most things will just want to set a value, so make it first arg
- $instance->$initializer($value, $callback, $self);
}
sub set_value {
my ($self, $instance, @args) = @_;
my $value = $args[0];
- my $attr_name = $self->name;
+ my $attr_name = quotemeta($self->name);
if ($self->is_required and not @args) {
$self->throw_error("Attribute ($attr_name) is required", object => $instance);
}
}
+sub _inline_set_value {
+ my $self = shift;
+ my ($instance, $value, $tc, $coercion, $message, $for_constructor) = @_;
+
+ my $old = '@old';
+ my $copy = '$val';
+ $tc ||= '$type_constraint';
+ $coercion ||= '$type_coercion';
+ $message ||= '$type_message';
+
+ my @code;
+ if ($self->_writer_value_needs_copy) {
+ push @code, $self->_inline_copy_value($value, $copy);
+ $value = $copy;
+ }
+
+ # constructors already handle required checks
+ push @code, $self->_inline_check_required
+ unless $for_constructor;
+
+ push @code, $self->_inline_tc_code($value, $tc, $coercion, $message);
+
+ # constructors do triggers all at once at the end
+ push @code, $self->_inline_get_old_value_for_trigger($instance, $old)
+ unless $for_constructor;
+
+ push @code, (
+ $self->SUPER::_inline_set_value($instance, $value),
+ $self->_inline_weaken_value($instance, $value),
+ );
+
+ # constructors do triggers all at once at the end
+ push @code, $self->_inline_trigger($instance, $value, $old)
+ unless $for_constructor;
+
+ return @code;
+}
+
+sub _writer_value_needs_copy {
+ my $self = shift;
+ return $self->should_coerce;
+}
+
+sub _inline_copy_value {
+ my $self = shift;
+ my ($value, $copy) = @_;
+
+ return 'my ' . $copy . ' = ' . $value . ';'
+}
+
+sub _inline_check_required {
+ my $self = shift;
+
+ return unless $self->is_required;
+
+ my $attr_name = quotemeta($self->name);
+
+ return (
+ 'if (@_ < 2) {',
+ $self->_inline_throw_error(
+ '"Attribute (' . $attr_name . ') is required"'
+ ) . ';',
+ '}',
+ );
+}
+
+sub _inline_tc_code {
+ my $self = shift;
+ my ($value, $tc, $coercion, $message, $is_lazy) = @_;
+ return (
+ $self->_inline_check_coercion(
+ $value, $tc, $coercion, $is_lazy,
+ ),
+ $self->_inline_check_constraint(
+ $value, $tc, $message, $is_lazy,
+ ),
+ );
+}
+
+sub _inline_check_coercion {
+ my $self = shift;
+ my ($value, $tc, $coercion) = @_;
+
+ return unless $self->should_coerce && $self->type_constraint->has_coercion;
+
+ if ( $self->type_constraint->can_be_inlined ) {
+ return (
+ 'if (! (' . $self->type_constraint->_inline_check($value) . ')) {',
+ $value . ' = ' . $coercion . '->(' . $value . ');',
+ '}',
+ );
+ }
+ else {
+ return (
+ 'if (!' . $tc . '->(' . $value . ')) {',
+ $value . ' = ' . $coercion . '->(' . $value . ');',
+ '}',
+ );
+ }
+}
+
+sub _inline_check_constraint {
+ my $self = shift;
+ my ($value, $tc, $message) = @_;
+
+ return unless $self->has_type_constraint;
+
+ my $attr_name = quotemeta($self->name);
+
+ if ( $self->type_constraint->can_be_inlined ) {
+ return (
+ 'if (! (' . $self->type_constraint->_inline_check($value) . ')) {',
+ $self->_inline_throw_error(
+ '"Attribute (' . $attr_name . ') does not pass the type '
+ . 'constraint because: " . '
+ . 'do { local $_ = ' . $value . '; '
+ . $message . '->(' . $value . ')'
+ . '}',
+ 'data => ' . $value
+ ) . ';',
+ '}',
+ );
+ }
+ else {
+ return (
+ 'if (!' . $tc . '->(' . $value . ')) {',
+ $self->_inline_throw_error(
+ '"Attribute (' . $attr_name . ') does not pass the type '
+ . 'constraint because: " . '
+ . 'do { local $_ = ' . $value . '; '
+ . $message . '->(' . $value . ')'
+ . '}',
+ 'data => ' . $value
+ ) . ';',
+ '}',
+ );
+ }
+}
+
+sub _inline_get_old_value_for_trigger {
+ my $self = shift;
+ my ($instance, $old) = @_;
+
+ return unless $self->has_trigger;
+
+ return (
+ 'my ' . $old . ' = ' . $self->_inline_instance_has($instance),
+ '? ' . $self->_inline_instance_get($instance),
+ ': ();',
+ );
+}
+
+sub _inline_weaken_value {
+ my $self = shift;
+ my ($instance, $value) = @_;
+
+ return unless $self->is_weak_ref;
+
+ my $mi = $self->associated_class->get_meta_instance;
+ return (
+ $mi->inline_weaken_slot_value($instance, $self->name),
+ 'if ref ' . $value . ';',
+ );
+}
+
+sub _inline_trigger {
+ my $self = shift;
+ my ($instance, $value, $old) = @_;
+
+ return unless $self->has_trigger;
+
+ return '$trigger->(' . $instance . ', ' . $value . ', ' . $old . ');';
+}
+
+sub _eval_environment {
+ my $self = shift;
+
+ my $env = { };
+
+ $env->{'$trigger'} = \($self->trigger)
+ if $self->has_trigger;
+ $env->{'$attr_default'} = \($self->default)
+ if $self->has_default;
+
+ if ($self->has_type_constraint) {
+ my $tc_obj = $self->type_constraint;
+
+ $env->{'$type_constraint'} = \(
+ $tc_obj->_compiled_type_constraint
+ ) unless $tc_obj->can_be_inlined;
+ # these two could probably get inlined versions too
+ $env->{'$type_coercion'} = \(
+ $tc_obj->coercion->_compiled_type_coercion
+ ) if $tc_obj->has_coercion;
+ $env->{'$type_message'} = \(
+ $tc_obj->has_message ? $tc_obj->message : $tc_obj->_default_message
+ );
+
+ $env = { %$env, %{ $tc_obj->inline_environment } };
+ }
+
+ # XXX ugh, fix these
+ $env->{'$attr'} = \$self
+ if $self->has_initializer && $self->is_lazy;
+ # pretty sure this is only going to be closed over if you use a custom
+ # error class at this point, but we should still get rid of this
+ # at some point
+ $env->{'$meta'} = \($self->associated_class);
+
+ return $env;
+}
+
sub _weaken_value {
my ( $self, $instance ) = @_;
$value = $self->_coerce_and_verify( $value, $instance );
$self->set_initial_value($instance, $value);
+
+ if ( ref $value && $self->is_weak_ref ) {
+ $self->_weaken_value($instance);
+ }
}
}
}
}
+sub _inline_get_value {
+ my $self = shift;
+ my ($instance, $tc, $coercion, $message) = @_;
+
+ my $slot_access = $self->_inline_instance_get($instance);
+ $tc ||= '$type_constraint';
+ $coercion ||= '$type_coercion';
+ $message ||= '$type_message';
+
+ return (
+ $self->_inline_check_lazy($instance, $tc, $coercion, $message),
+ $self->_inline_return_auto_deref($slot_access),
+ );
+}
+
+sub _inline_check_lazy {
+ my $self = shift;
+ my ($instance, $tc, $coercion, $message) = @_;
+
+ return unless $self->is_lazy;
+
+ my $slot_exists = $self->_inline_instance_has($instance);
+
+ return (
+ 'if (!' . $slot_exists . ') {',
+ $self->_inline_init_from_default($instance, '$default', $tc, $coercion, $message, 'lazy'),
+ '}',
+ );
+}
+
+sub _inline_init_from_default {
+ my $self = shift;
+ my ($instance, $default, $tc, $coercion, $message, $for_lazy) = @_;
+
+ if (!($self->has_default || $self->has_builder)) {
+ $self->throw_error(
+ 'You cannot have a lazy attribute '
+ . '(' . $self->name . ') '
+ . 'without specifying a default value for it',
+ attr => $self,
+ );
+ }
+
+ return (
+ $self->_inline_generate_default($instance, $default),
+ # intentionally not using _inline_tc_code, since that can be overridden
+ # to do things like possibly only do member tc checks, which isn't
+ # appropriate for checking the result of a default
+ $self->has_type_constraint
+ ? ($self->_inline_check_coercion($default, $tc, $coercion, $for_lazy),
+ $self->_inline_check_constraint($default, $tc, $message, $for_lazy))
+ : (),
+ $self->_inline_init_slot($instance, $default),
+ $self->_inline_weaken_value($instance, $default),
+ );
+}
+
+sub _inline_generate_default {
+ my $self = shift;
+ my ($instance, $default) = @_;
+
+ if ($self->has_default) {
+ my $source = 'my ' . $default . ' = $attr_default';
+ $source .= '->(' . $instance . ')'
+ if $self->is_default_a_coderef;
+ return $source . ';';
+ }
+ elsif ($self->has_builder) {
+ my $builder = B::perlstring($self->builder);
+ my $builder_str = quotemeta($self->builder);
+ my $attr_name_str = quotemeta($self->name);
+ return (
+ 'my ' . $default . ';',
+ 'if (my $builder = ' . $instance . '->can(' . $builder . ')) {',
+ $default . ' = ' . $instance . '->$builder;',
+ '}',
+ 'else {',
+ 'my $class = ref(' . $instance . ') || ' . $instance . ';',
+ $self->_inline_throw_error(
+ '"$class does not support builder method '
+ . '\'' . $builder_str . '\' for attribute '
+ . '\'' . $attr_name_str . '\'"'
+ ) . ';',
+ '}',
+ );
+ }
+ else {
+ $self->throw_error(
+ "Can't generate a default for " . $self->name
+ . " since no default or builder was specified"
+ );
+ }
+}
+
+sub _inline_init_slot {
+ my $self = shift;
+ my ($inv, $value) = @_;
+
+ if ($self->has_initializer) {
+ return '$attr->set_initial_value(' . $inv . ', ' . $value . ');';
+ }
+ else {
+ return $self->_inline_instance_set($inv, $value) . ';';
+ }
+}
+
+sub _inline_return_auto_deref {
+ my $self = shift;
+
+ return 'return ' . $self->_auto_deref(@_) . ';';
+}
+
+sub _auto_deref {
+ my $self = shift;
+ my ($ref_value) = @_;
+
+ return $ref_value unless $self->should_auto_deref;
+
+ my $type_constraint = $self->type_constraint;
+
+ my $sigil;
+ if ($type_constraint->is_a_type_of('ArrayRef')) {
+ $sigil = '@';
+ }
+ elsif ($type_constraint->is_a_type_of('HashRef')) {
+ $sigil = '%';
+ }
+ else {
+ $self->throw_error(
+ 'Can not auto de-reference the type constraint \''
+ . $type_constraint->name
+ . '\'',
+ type_constraint => $type_constraint,
+ );
+ }
+
+ return 'wantarray '
+ . '? ' . $sigil . '{ (' . $ref_value . ') || return } '
+ . ': (' . $ref_value . ')';
+}
+
## installing accessors
sub accessor_metaclass { 'Moose::Meta::Method::Accessor' }
sub _process_accessors {
my $self = shift;
my ($type, $accessor, $generate_as_inline_methods) = @_;
- $accessor = (keys %$accessor)[0] if (ref($accessor)||'') eq 'HASH';
+
+ $accessor = ( keys %$accessor )[0] if ( ref($accessor) || '' ) eq 'HASH';
my $method = $self->associated_class->get_method($accessor);
- if ($method && !$method->isa('Class::MOP::Method::Accessor')
- && (!$self->definition_context
- || $method->package_name eq $self->definition_context->{package})) {
+
+ if ( $method
+ && $method->isa('Class::MOP::Method::Accessor')
+ && $method->associated_attribute->name ne $self->name ) {
+
+ my $other_attr_name = $method->associated_attribute->name;
+ my $name = $self->name;
+
+ Carp::cluck(
+ "You are overwriting an accessor ($accessor) for the $other_attr_name attribute"
+ . " with a new accessor method for the $name attribute" );
+ }
+
+ if (
+ $method
+ && !$method->is_stub
+ && !$method->isa('Class::MOP::Method::Accessor')
+ && ( !$self->definition_context
+ || $method->package_name eq $self->definition_context->{package} )
+ ) {
+
Carp::cluck(
"You are overwriting a locally defined method ($accessor) with "
- . "an accessor"
- );
+ . "an accessor" );
+ }
+
+ if ( !$self->associated_class->has_method($accessor)
+ && $self->associated_class->has_package_symbol( '&' . $accessor ) ) {
+
+ Carp::cluck(
+ "You are overwriting a locally defined function ($accessor) with "
+ . "an accessor" );
}
+
$self->SUPER::_process_accessors(@_);
}
# install the delegation ...
my $associated_class = $self->associated_class;
- foreach my $handle (keys %handles) {
+ foreach my $handle (sort keys %handles) {
my $method_to_call = $handles{$handle};
my $class_name = $associated_class->name;
my $name = "${class_name}::${handle}";
- (!$associated_class->has_method($handle))
- || $self->throw_error("You cannot overwrite a locally defined method ($handle) with a delegation", method_name => $handle);
+ if ( my $method = $associated_class->get_method($handle) ) {
+ $self->throw_error(
+ "You cannot overwrite a locally defined method ($handle) with a delegation",
+ method_name => $handle
+ ) unless $method->is_stub;
+ }
# NOTE:
# handles is not allowed to delegate
}
}
- Class::MOP::load_class($handles);
+ load_class($handles);
my $role_meta = Class::MOP::class_of($handles);
(blessed $role_meta && $role_meta->isa('Moose::Meta::Role'))
|| $self->throw_error("Unable to canonicalize the 'handles' option with $handles because its metaclass is not a Moose::Meta::Role", data => $handles);
return map { $_ => $_ }
- grep { $_ ne 'meta' } (
- $role_meta->get_method_list,
- map { $_->name } $role_meta->get_required_method_list,
+ map { $_->name }
+ grep { !$_->isa('Class::MOP::Method::Meta') } (
+ $role_meta->_get_local_methods,
+ $role_meta->get_required_method_list,
);
}
-sub _find_delegate_metaclass {
- my $self = shift;
- if (my $class = $self->_isa_metadata) {
- # we might be dealing with a non-Moose class,
- # and need to make our own metaclass. if there's
- # already a metaclass, it will be returned
- return Moose::Meta::Class->initialize($class);
- }
- elsif (my $role = $self->_does_metadata) {
- return Class::MOP::class_of($role);
- }
- else {
- $self->throw_error("Cannot find delegate metaclass for attribute " . $self->name);
- }
-}
-
sub _get_delegate_method_list {
my $self = shift;
my $meta = $self->_find_delegate_metaclass;
if ($meta->isa('Class::MOP::Class')) {
return map { $_->name } # NOTE: !never! delegate &meta
- grep { $_->package_name ne 'Moose::Object' && $_->name ne 'meta' }
+ grep { $_->package_name ne 'Moose::Object' && !$_->isa('Class::MOP::Method::Meta') }
$meta->get_all_methods;
}
elsif ($meta->isa('Moose::Meta::Role')) {
}
}
+sub _find_delegate_metaclass {
+ my $self = shift;
+ if (my $class = $self->_isa_metadata) {
+ unless ( is_class_loaded($class) ) {
+ $self->throw_error(
+ sprintf(
+ 'The %s attribute is trying to delegate to a class which has not been loaded - %s',
+ $self->name, $class
+ )
+ );
+ }
+ # we might be dealing with a non-Moose class,
+ # and need to make our own metaclass. if there's
+ # already a metaclass, it will be returned
+ return Class::MOP::Class->initialize($class);
+ }
+ elsif (my $role = $self->_does_metadata) {
+ unless ( is_class_loaded($class) ) {
+ $self->throw_error(
+ sprintf(
+ 'The %s attribute is trying to delegate to a role which has not been loaded - %s',
+ $self->name, $role
+ )
+ );
+ }
+
+ return Class::MOP::class_of($role);
+ }
+ else {
+ $self->throw_error("Cannot find delegate metaclass for attribute " . $self->name);
+ }
+}
+
sub delegation_metaclass { 'Moose::Meta::Method::Delegation' }
sub _make_delegation_method {
return $val unless $self->has_type_constraint;
- my $type_constraint = $self->type_constraint;
- if ($self->should_coerce && $type_constraint->has_coercion) {
- $val = $type_constraint->coerce($val);
- }
+ $val = $self->type_constraint->coerce($val)
+ if $self->should_coerce && $self->type_constraint->has_coercion;
$self->verify_against_type_constraint($val, instance => $instance);
1;
+# ABSTRACT: The Moose attribute metaclass
+
__END__
=pod
-=head1 NAME
-
-Moose::Meta::Attribute - The Moose attribute metaclass
-
=head1 DESCRIPTION
This class is a subclass of L<Class::MOP::Attribute> that provides
=over 4
-=item B<< Moose::Meta::Attribute->new(%options) >>
+=item B<< Moose::Meta::Attribute->new($name, %options) >>
This method overrides the L<Class::MOP::Attribute> constructor.
=item * coerce => $bool
This option is only valid for objects with a type constraint
-(C<isa>). If this is true, then coercions will be applied whenever
+(C<isa>) that defined a coercion. If this is true, then coercions will be applied whenever
this attribute is set.
You can make both this and the C<weak_ref> option true.
predicate => 'has_size',
);
+
+If your attribute name starts with an underscore (C<_>), then the clearer
+and predicate will as well:
+
+ has '_size' => (
+ is => 'ro',
+ lazy_build => 1,
+ );
+
+becomes:
+
+ has '_size' => (
+ is => 'ro',
+ lazy => 1,
+ builder => '_build__size',
+ clearer => '_clear_size',
+ predicate => '_has_size',
+ );
+
+Note the doubled underscore in the builder name. Internally, Moose
+simply prepends the attribute name with "_build_" to come up with the
+builder name.
+
=item * documentation
An arbitrary string that can be retrieved later by calling C<<
Before setting the value, a check is made on the type constraint of
the attribute, if it has one, to see if the value passes it. If the
-value fails to pass, the set operation dies with a L</throw_error>.
+value fails to pass, the set operation dies.
Any coercion to convert values is done before checking the type constraint.
To check a value against a type constraint before setting it, fetch the
attribute instance using L<Class::MOP::Class/find_attribute_by_name>,
fetch the type_constraint from the attribute using L<Moose::Meta::Attribute/type_constraint>
-and call L<Moose::Meta::TypeConstraint/check>. See L<Moose::Cookbook::Basics::Recipe4>
+and call L<Moose::Meta::TypeConstraint/check>. See L<Moose::Cookbook::Basics::Company_Subtypes>
for an example.
=back
This method overrides the parent to also remove delegation methods.
+=item B<< $attr->inline_set($instance_var, $value_var) >>
+
+This method return a code snippet suitable for inlining the relevant
+operation. It expect strings containing variable names to be used in the
+inlining, like C<'$self'> or C<'$_[1]'>.
+
=item B<< $attr->install_delegation >>
This method adds its delegation methods to the attribute's associated
the C<clone> method.
One of its main tasks is to make sure that the C<%options> provided
-only includes the options returned by the
-C<legal_options_for_inheritance> method.
+does not include the options returned by the
+C<illegal_options_for_inheritance> method.
-=item B<< $attr->legal_options_for_inheritance >>
+=item B<< $attr->illegal_options_for_inheritance >>
-This returns a whitelist of options that can be overridden in a
+This returns a blacklist of options that can not be overridden in a
subclass's attribute definition.
This exists to allow a custom metaclass to change or add to the list
-of options which can be changed.
+of options which can not be changed.
=item B<< $attr->type_constraint >>
See L<Moose/BUGS> for details on reporting bugs.
-=head1 AUTHOR
-
-Stevan Little E<lt>stevan@iinteractive.comE<gt>
-
-Yuval Kogman E<lt>nothingmuch@woobling.comE<gt>
-
-=head1 COPYRIGHT AND LICENSE
-
-Copyright 2006-2010 by Infinity Interactive, Inc.
-
-L<http://www.iinteractive.com>
-
-This library is free software; you can redistribute it and/or modify
-it under the same terms as Perl itself.
-
=cut
projects / gitmo/Moose.git / blobdiff