use strict;
use warnings;
-use Scalar::Util ();
+use Carp ();
+use Scalar::Util qw(weaken);
+
+use Mouse::Util qw(:meta);
+
use Mouse::Meta::TypeConstraint;
use Mouse::Meta::Method::Accessor;
-sub new {
- my ($class, $name, %options) = @_;
+sub _process_options{
+ my($class, $name, $args) = @_;
+
+ # taken from Class::MOP::Attribute::new
+
+ defined($name)
+ or $class->throw_error('You must provide a name for the attribute');
+
+ if(!exists $args->{init_arg}){
+ $args->{init_arg} = $name;
+ }
+
+ # 'required' requires eigher 'init_arg', 'builder', or 'default'
+ my $can_be_required = defined( $args->{init_arg} );
+
+ if(exists $args->{builder}){
+ $class->throw_error('builder must be a defined scalar value which is a method name')
+ if ref $args->{builder} || !(defined $args->{builder});
+
+ $can_be_required++;
+ }
+ elsif(exists $args->{default}){
+ if(ref $args->{default} && ref($args->{default}) ne 'CODE'){
+ $class->throw_error("References are not allowed as default values, you must "
+ . "wrap the default of '$name' in a CODE reference (ex: sub { [] } and not [])");
+ }
+ $can_be_required++;
+ }
+
+ if( $args->{required} && !$can_be_required ) {
+ $class->throw_error("You cannot have a required attribute ($name) without a default, builder, or an init_arg");
+ }
+
+ # taken from Mouse::Meta::Attribute->new and _process_args->
+
+ if(exists $args->{is}){
+ my $is = $args->{is};
+
+ if($is eq 'ro'){
+ $args->{reader} ||= $name;
+ }
+ elsif($is eq 'rw'){
+ if(exists $args->{writer}){
+ $args->{reader} ||= $name;
+ }
+ else{
+ $args->{accessor} ||= $name;
+ }
+ }
+ elsif($is eq 'bare'){
+ # do nothing, but don't complain (later) about missing methods
+ }
+ else{
+ $is = 'undef' if !defined $is;
+ $class->throw_error("I do not understand this option (is => $is) on attribute ($name)");
+ }
+ }
+
+ my $tc;
+ if(exists $args->{isa}){
+ $args->{type_constraint} = Mouse::Util::TypeConstraints::find_or_create_isa_type_constraint($args->{isa});
+ }
+ elsif(exists $args->{does}){
+ $args->{type_constraint} = Mouse::Util::TypeConstraints::find_or_create_does_type_constraint($args->{does});
+ }
+ $tc = $args->{type_constraint};
+
+ if($args->{coerce}){
+ defined($tc)
+ || $class->throw_error("You cannot have coercion without specifying a type constraint on attribute ($name)");
- $options{name} = $name;
+ $args->{weak_ref}
+ && $class->throw_error("You cannot have a weak reference to a coerced value on attribute ($name)");
+ }
+
+ if ($args->{lazy_build}) {
+ exists($args->{default})
+ && $class->throw_error("You can not use lazy_build and default for the same attribute ($name)");
+
+ $args->{lazy} = 1;
+ $args->{builder} ||= "_build_${name}";
+ if ($name =~ /^_/) {
+ $args->{clearer} ||= "_clear${name}";
+ $args->{predicate} ||= "_has${name}";
+ }
+ else {
+ $args->{clearer} ||= "clear_${name}";
+ $args->{predicate} ||= "has_${name}";
+ }
+ }
- $options{init_arg} = $name
- unless exists $options{init_arg};
+ if ($args->{auto_deref}) {
+ defined($tc)
+ || $class->throw_error("You cannot auto-dereference without specifying a type constraint on attribute ($name)");
- my $is = $options{is} ||= '';
+ ( $tc->is_a_type_of('ArrayRef') || $tc->is_a_type_of('HashRef') )
+ || $class->throw_error("You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute ($name)");
+ }
- if($is eq 'rw'){
- $options{accessor} = $name if !exists $options{accessor};
+ if (exists $args->{trigger}) {
+ ('CODE' eq ref $args->{trigger})
+ || $class->throw_error("Trigger must be a CODE ref on attribute ($name)");
}
- elsif($is eq 'ro'){
- $options{reader} = $name if !exists $options{reader};
+
+ if ($args->{lazy}) {
+ (exists $args->{default} || defined $args->{builder})
+ || $class->throw_error("You cannot have lazy attribute ($name) without specifying a default value for it");
}
- bless \%options, $class;
+ # XXX: for backward compatibility (with method modifiers)
+ if($class->can('canonicalize_args') != \&canonicalize_args){
+ %{$args} = $class->canonicalize_args($name, %{$args});
+ }
+ return;
+}
+
+sub new {
+ my $class = shift;
+ my $name = shift;
+
+ my %args = (@_ == 1) ? %{ $_[0] } : @_;
+
+ $class->_process_options($name, \%args);
+
+ $args{name} = $name;
+
+ my $instance = bless \%args, $class;
+
+ # extra attributes
+ if($class ne __PACKAGE__){
+ $class->meta->_initialize_instance($instance,\%args);
+ }
+
+# XXX: there is no fast way to check attribute validity
+# my @bad = ...;
+# if(@bad){
+# @bad = sort @bad;
+# Carp::cluck("Found unknown argument(s) passed to '$name' attribute constructor in '$class': @bad");
+# }
+
+ return $instance
}
# readers
sub is_weak_ref { $_[0]->{weak_ref} }
sub init_arg { $_[0]->{init_arg} }
sub type_constraint { $_[0]->{type_constraint} }
-sub find_type_constraint {
- Carp::carp("This method was deprecated");
- $_[0]->type_constraint();
-}
+
sub trigger { $_[0]->{trigger} }
sub builder { $_[0]->{builder} }
sub should_auto_deref { $_[0]->{auto_deref} }
-sub should_coerce { $_[0]->{should_coerce} }
+sub should_coerce { $_[0]->{coerce} }
+
+sub get_read_method { $_[0]->{reader} || $_[0]->{accessor} }
+sub get_write_method { $_[0]->{writer} || $_[0]->{accessor} }
# predicates
sub has_trigger { exists $_[0]->{trigger} }
sub has_builder { exists $_[0]->{builder} }
+sub has_read_method { exists $_[0]->{reader} || exists $_[0]->{accessor} }
+sub has_write_method { exists $_[0]->{writer} || exists $_[0]->{accessor} }
+
sub _create_args {
$_[0]->{_create_args} = $_[1] if @_ > 1;
$_[0]->{_create_args}
sub accessor_metaclass { 'Mouse::Meta::Method::Accessor' }
-sub _inlined_name {
- my $self = shift;
- return sprintf '"%s"', quotemeta $self->name;
-}
-
-
-sub create {
- my ($self, $class, $name, %args) = @_;
-
- $args{name} = $name;
- $args{associated_class} = $class;
-
- %args = $self->canonicalize_args($name, %args);
- $self->validate_args($name, \%args);
+sub interpolate_class{
+ my($class, $name, $args) = @_;
- $args{should_coerce} = delete $args{coerce}
- if exists $args{coerce};
-
- if (exists $args{isa}) {
- my $type_constraint = delete $args{isa};
- $args{type_constraint}= Mouse::Util::TypeConstraints::find_or_create_isa_type_constraint($type_constraint);
+ if(my $metaclass = delete $args->{metaclass}){
+ $class = Mouse::Util::resolve_metaclass_alias( Attribute => $metaclass );
}
- my $attribute = $self->new($name, %args);
+ my @traits;
+ if(my $traits_ref = delete $args->{traits}){
- $attribute->_create_args(\%args);
+ for (my $i = 0; $i < @{$traits_ref}; $i++) {
+ my $trait = Mouse::Util::resolve_metaclass_alias(Attribute => $traits_ref->[$i], trait => 1);
- $class->add_attribute($attribute);
+ next if $class->does($trait);
- my $associated_methods = 0;
+ push @traits, $trait;
- my $generator_class = $self->accessor_metaclass;
- foreach my $type(qw(accessor reader writer predicate clearer handles)){
- if(exists $attribute->{$type}){
- my $installer = '_install_' . $type;
- $generator_class->$installer($attribute, $attribute->{$type}, $class);
- $associated_methods++;
+ # are there options?
+ push @traits, $traits_ref->[++$i]
+ if ref($traits_ref->[$i+1]);
}
- }
-
- if($associated_methods == 0 && ($attribute->_is_metadata || '') ne 'bare'){
- Carp::cluck(qq{Attribute ($name) of class }.$class->name.qq{ has no associated methods (did you mean to provide an "is" argument?)});
+ if (@traits) {
+ $class = Mouse::Meta::Class->create_anon_class(
+ superclasses => [ $class ],
+ roles => \@traits,
+ cache => 1,
+ )->name;
+ }
}
- return $attribute;
+ return( $class, @traits );
}
-sub canonicalize_args {
- my $self = shift;
- my $name = shift;
- my %args = @_;
+sub canonicalize_args{
+ my ($self, $name, %args) = @_;
- if ($args{lazy_build}) {
- $args{lazy} = 1;
- $args{required} = 1;
- $args{builder} = "_build_${name}"
- if !exists($args{builder});
- if ($name =~ /^_/) {
- $args{clearer} = "_clear${name}" if !exists($args{clearer});
- $args{predicate} = "_has${name}" if !exists($args{predicate});
- }
- else {
- $args{clearer} = "clear_${name}" if !exists($args{clearer});
- $args{predicate} = "has_${name}" if !exists($args{predicate});
- }
- }
+ Carp::cluck("$self->canonicalize_args has been deprecated."
+ . "Use \$self->_process_options instead.");
return %args;
}
-sub validate_args {
- my $self = shift;
- my $name = shift;
- my $args = shift;
-
- $self->throw_error("You can not use lazy_build and default for the same attribute ($name)")
- if $args->{lazy_build} && exists $args->{default};
-
- $self->throw_error("You cannot have lazy attribute ($name) without specifying a default value for it")
- if $args->{lazy}
- && !exists($args->{default})
- && !exists($args->{builder});
-
- $self->throw_error("References are not allowed as default values, you must wrap the default of '$name' in a CODE reference (ex: sub { [] } and not [])")
- if ref($args->{default})
- && ref($args->{default}) ne 'CODE';
-
- $self->throw_error("You cannot auto-dereference without specifying a type constraint on attribute ($name)")
- if $args->{auto_deref} && !exists($args->{isa});
-
- $self->throw_error("You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute ($name)")
- if $args->{auto_deref}
- && $args->{isa} !~ /^(?:ArrayRef|HashRef)(?:\[.*\])?$/;
-
- if ($args->{trigger}) {
- if (ref($args->{trigger}) eq 'HASH') {
- $self->throw_error("HASH-based form of trigger has been removed. Only the coderef form of triggers are now supported.");
- }
+sub create {
+ my ($self, $class, $name, %args) = @_;
- $self->throw_error("Trigger must be a CODE ref on attribute ($name)")
- if ref($args->{trigger}) ne 'CODE';
- }
+ Carp::cluck("$self->create has been deprecated."
+ . "Use \$meta->add_attribute and \$attr->install_accessors instead.");
- return 1;
+ # noop
+ return $self;
}
sub verify_against_type_constraint {
}
}
+sub clone_and_inherit_options{
+ my $self = shift;
+ my $name = shift;
+
+ return ref($self)->new($name, %{$self}, @_ == 1 ? %{$_[0]} : @_);
+}
+
sub clone_parent {
my $self = shift;
my $class = shift;
my $name = shift;
my %args = ($self->get_parent_args($class, $name), @_);
+ Carp::cluck("$self->clone_parent has been deprecated."
+ . "Use \$meta->add_attribute and \$attr->install_accessors instead.");
+
+
$self->create($class, $name, %args);
}
$self->throw_error("Could not find an attribute by the name of '$name' to inherit from");
}
+sub install_accessors{
+ my($attribute) = @_;
+
+ my $metaclass = $attribute->{associated_class};
+ my $generator_class = $attribute->accessor_metaclass;
+
+ foreach my $type(qw(accessor reader writer predicate clearer handles)){
+ if(exists $attribute->{$type}){
+ my $installer = '_install_' . $type;
+ $generator_class->$installer($attribute, $attribute->{$type}, $metaclass);
+ $attribute->{associated_methods}++;
+ }
+ }
+
+ if($attribute->can('create') != \&create){
+ $attribute->create($metaclass, $attribute->name, %{$attribute});
+ }
+
+ return;
+}
+
sub throw_error{
my $self = shift;