$args{is} ||= '';
- if ($args{lazy_build}) {
- confess("You can not use lazy_build and default for the same attribute $name")
- if exists $args{default};
- $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});
- }
- }
-
bless \%args, $class;
}
$args{name} = $name;
$args{class} = $class;
- $self->validate_args($name, %args);
+ %args = $self->canonicalize_args($name, %args);
+ $self->validate_args($name, \%args);
$args{type_constraint} = delete $args{isa}
if exists $args{isa};
return $attribute;
}
-sub validate_args {
+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 $args = shift;
+
+ confess "You can not use lazy_build and default for the same attribute ($name)"
+ if $args->{lazy_build} && exists $args->{default};
+
confess "You cannot have lazy attribute ($name) without specifying a default value for it"
- if $args{lazy} && !exists($args{default}) && !exists($args{builder});
+ if $args->{lazy}
+ && !exists($args->{default})
+ && !exists($args->{builder});
confess "References are not allowed as default values, you must wrap the default of '$name' in a CODE reference (ex: sub { [] } and not [])"
- if ref($args{default})
- && ref($args{default}) ne 'CODE';
+ if ref($args->{default})
+ && ref($args->{default}) ne 'CODE';
confess "You cannot auto-dereference without specifying a type constraint on attribute $name"
- if $args{auto_deref} && !exists($args{isa});
+ if $args->{auto_deref} && !exists($args->{isa});
confess "You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute $name"
- if $args{auto_deref}
- && $args{isa} ne 'ArrayRef'
- && $args{isa} ne 'HashRef';
+ if $args->{auto_deref}
+ && $args->{isa} ne 'ArrayRef'
+ && $args->{isa} ne 'HashRef';
+
+ confess "Trigger must be a CODE or HASH ref on attribute ($name)"
+ if $args{trigger}
+ && ref($args{trigger}) ne 'CODE' && ref($args{trigger}) ne 'HASH';
return 1;
}
Checks that the given value passes this attribute's type constraint. Returns 1
on success, otherwise C<confess>es.
+=head2 canonicalize_args Name, %args -> %args
+
+Canonicalizes some arguments to create. In particular, C<lazy_build> is
+canonicalized into C<lazy>, C<builder>, etc.
+
+=head2 validate_args Name, \%args -> 1 | ERROR
+
+Checks that the arguments to create the attribute (ie those specified by
+C<has>) are valid.
+
=head2 clone_parent OwnerClass, AttributeName, %args -> Mouse::Meta::Attribute
Creates a new attribute in OwnerClass, inheriting options from parent classes.