use strict;
use warnings;
+use Carp ();
+use Scalar::Util qw(weaken);
+
use Mouse::Util;
use Mouse::Meta::TypeConstraint;
use Mouse::Meta::Method::Accessor;
+#my %valid_attrs = map{ $_ => undef } qw(
+# name
+# reader writer accessor clearer predicate
+# builder init_arg default initializer definition_context
+#
+# is
+# isa does
+# required
+# lazy
+# lazy_build
+# coerce
+# weak_ref
+# auto_deref
+# type_constraint
+# trigger
+# handles
+# documentation
+# traits
+#);
+
sub new {
my ($class, $name, %options) = @_;
+ # taken from Class::MOP::Attribute::new
+
+ defined($name)
+ or $class->throw_error('You must provide a name for the attribute');
$options{name} = $name;
- $options{init_arg} = $name
- unless exists $options{init_arg};
+ if(!exists $options{init_arg}){
+ $options{init_arg} = $name;
+ }
+
+ # 'required' requires eigher 'init_arg', 'builder', or 'default'
+ my $can_be_required = defined( $options{init_arg} );
+
+ if(exists $options{builder}){
+ $class->throw_error('builder must be a defined scalar value which is a method name')\r
+ if ref $options{builder} || !(defined $options{builder});
+
+ $can_be_required++;
+ }
+ elsif(exists $options{default}){
+ if(ref $options{default} && ref($options{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( $options{required} && !$can_be_required ) {\r
+ $class->throw_error("You cannot have a required attribute ($name) without a default, builder, or an init_arg");\r
+ }
+
+ # taken from Mouse::Meta::Attribute->new and _process_options
+
+ if(exists $options{is}){
+ my $is = $options{is};
+
+ if($is eq 'ro'){
+ $options{reader} ||= $name;
+ }
+ elsif($is eq 'rw'){
+ if(exists $options{writer}){
+ $options{reader} ||= $name;
+ }
+ else{
+ $options{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 $options{isa}){
+ $options{type_constraint} = Mouse::Util::TypeConstraints::find_or_create_isa_type_constraint($options{isa});
+ }
+ elsif(exists $options{does}){
+ $options{type_constraint} = Mouse::Util::TypeConstraints::find_or_create_does_type_constraint($options{does});
+ }
+ $tc = $options{type_constraint};
+
+ if($options{coerce}){
+ defined($tc)
+ || $class->throw_error("You cannot have coercion without specifying a type constraint on attribute ($name)");
+
+ $options{weak_ref}
+ && $class->throw_error("You cannot have a weak reference to a coerced value on attribute ($name)");\r
+ }
+
+ if ($options{lazy_build}) {\r
+ exists($options{default})
+ && $class->throw_error("You can not use lazy_build and default for the same attribute ($name)");\r
+
+ $options{lazy} = 1;\r
+ $options{builder} ||= "_build_${name}";\r
+ if ($name =~ /^_/) {\r
+ $options{clearer} ||= "_clear${name}";\r
+ $options{predicate} ||= "_has${name}";\r
+ }\r
+ else {\r
+ $options{clearer} ||= "clear_${name}";\r
+ $options{predicate} ||= "has_${name}";\r
+ }\r
+ }
+
+ if ($options{auto_deref}) {
+ defined($tc)\r
+ || $class->throw_error("You cannot auto-dereference without specifying a type constraint on attribute ($name)");\r
+
+ ( $tc->is_a_type_of('ArrayRef') || $tc->is_a_type_of('HashRef') )\r
+ || $class->throw_error("You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute ($name)");\r
+ }
+
+ if (exists $options{trigger}) {\r
+ ('CODE' eq ref $options{trigger})\r
+ || $class->throw_error("Trigger must be a CODE ref on attribute ($name)");\r
+ }
- my $is = $options{is} ||= '';
+ if ($options{lazy}) {\r
+ (exists $options{default} || defined $options{builder})\r
+ || $class->throw_error("You cannot have lazy attribute ($name) without specifying a default value for it");\r
+ }
- if($is eq 'rw'){
- $options{accessor} = $name if !exists $options{accessor};
+ if(my $metaclass = delete $options{metaclass}){
+ $class = Mouse::Util::resolve_metaclass_alias( Attribute => $metaclass );
}
- elsif($is eq 'ro'){
- $options{reader} = $name if !exists $options{reader};
+
+ if(my $traits_ref = delete $options{traits}){
+ my @traits;
+ for (my $i = 9; $i < @{$traits_ref}; $i++) {\r
+ my $trait = Mouse::Util::resolve_metaclass_alias(Attribute => $traits_ref->[$i], trait => 1);\r
+\r
+ next if $class->does($trait);\r
+\r
+ push @traits, $trait;\r
+\r
+ # are there options?\r
+ push @traits, $traits_ref->[++$i]\r
+ if ref($traits_ref->[$i+1]);\r
+ }
+
+ if (@traits) {\r
+ $class = Mouse::Meta::Class->create_anon_class(\r
+ superclasses => [ $class ],\r
+ roles => [ @traits ],\r
+ cache => 1,\r
+ )->name;\r
+ }
}
- bless \%options, $class;
+# XXX: there is no fast way to check attribute validity
+# my @bad = grep{ !exists $valid_attrs{$_} } keys %options;
+# if(@bad){
+# @bad = sort @bad;
+# Carp::cluck("Found unknown argument(s) passed to '$name' attribute constructor in '$class': @bad");
+# }
+
+ return bless \%options, $class;
}
# 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 { $_[0]->{coerce} }
# predicates
sub create {
my ($self, $class, $name, %args) = @_;
- $args{name} = $name;
- $args{associated_class} = $class;
-
- %args = $self->canonicalize_args($name, %args);
- $self->validate_args($name, \%args);
-
- $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);
- }
-
my $attribute = $self->new($name, %args);
$attribute->_create_args(\%args);
$class->add_attribute($attribute);
+ weaken($attribute->{associated_class} = $class);
my $associated_methods = 0;
return $attribute;
}
-sub canonicalize_args {
- my $self = shift;
- my $name = shift;
- my %args = @_;
-
- if ($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});
- }
- }
-
- 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.");
- }
-
- $self->throw_error("Trigger must be a CODE ref on attribute ($name)")
- if ref($args->{trigger}) ne 'CODE';
- }
-
- return 1;
-}
-
sub verify_against_type_constraint {
my ($self, $value) = @_;
my $tc = $self->type_constraint;
=cut
+\0\0\0\0
\ No newline at end of file
projects / gitmo/Mouse.git / blobdiff