1 package Mouse::Meta::Method::Accessor;
4 use Scalar::Util qw(blessed);
7 my (undef, $attribute, $method_name, $class, $type) = @_;
9 my $name = $attribute->name;
10 my $default = $attribute->default;
11 my $constraint = $attribute->type_constraint;
12 my $builder = $attribute->builder;
13 my $trigger = $attribute->trigger;
14 my $is_weak = $attribute->is_weak_ref;
15 my $should_deref = $attribute->should_auto_deref;
16 my $should_coerce = $attribute->should_coerce;
18 my $compiled_type_constraint = $constraint ? $constraint->{_compiled_type_constraint} : undef;
21 my $key = sprintf q{"%s"}, quotemeta $name;
26 '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
28 if ($type eq 'accessor' || $type eq 'writer') {
29 if($type eq 'accessor'){
31 '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
32 'if (scalar(@_) >= 2) {' . "\n";
36 '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
37 'if(@_ < 2){ Carp::confess("Not enough arguments for writer '.$method_name.'") }'.
47 '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
48 'my $val = Mouse::Util::TypeConstraints->typecast_constraints("'.$attribute->associated_class->name.'", $attribute->{type_constraint}, '.$value.');';
51 if ($compiled_type_constraint) {
54 '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
55 'unless ($compiled_type_constraint->('.$value.')) {
56 $attribute->verify_type_constraint_error($name, '.$value.', $attribute->{type_constraint});
61 '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
62 'unless ($constraint->check('.$value.')) {
63 $attribute->verify_type_constraint_error($name, '.$value.', $attribute->{type_constraint});
68 # if there's nothing left to do for the attribute we can return during
70 $accessor .= 'return ' if !$is_weak && !$trigger && !$should_deref;
72 $accessor .= $self.'->{'.$key.'} = '.$value.';' . "\n";
75 $accessor .= 'Scalar::Util::weaken('.$self.'->{'.$key.'}) if ref('.$self.'->{'.$key.'});' . "\n";
79 $accessor .= '$trigger->('.$self.', '.$value.');' . "\n";
84 elsif($type eq 'reader') {
85 $accessor .= 'Carp::confess("Cannot assign a value to a read-only accessor") if scalar(@_) >= 2;' . "\n";
88 $class->throw_error("Unknown accessor type '$type'");
91 if ($attribute->is_lazy) {
92 $accessor .= $self.'->{'.$key.'} = ';
94 $accessor .= $attribute->has_builder
96 : ref($default) eq 'CODE'
97 ? '$default->('.$self.')'
99 $accessor .= ' if !exists '.$self.'->{'.$key.'};' . "\n";
103 if ($constraint->is_a_type_of('ArrayRef')) {
104 $accessor .= 'if (wantarray) {
105 return @{ '.$self.'->{'.$key.'} || [] };
108 elsif($constraint->is_a_type_of('HashRef')){
109 $accessor .= 'if (wantarray) {
110 return %{ '.$self.'->{'.$key.'} || {} };
114 $class->throw_error("Can not auto de-reference the type constraint " . $constraint->name);
118 $accessor .= 'return '.$self.'->{'.$key."};\n}";
120 #print $accessor, "\n";
121 my $code = eval $accessor;
122 $attribute->throw_error($@) if $@;
124 $class->add_method($method_name => $code);
130 $class->_install_accessor(@_, 'reader');
136 $class->_install_accessor(@_, 'writer');
141 sub _install_predicate {
142 my (undef, $attribute, $method_name, $class) = @_;
144 my $slot = $attribute->name;
146 $class->add_method($method_name => sub{
147 return exists $_[0]->{$slot};
152 sub _install_clearer {
153 my (undef, $attribute, $method_name, $class) = @_;
155 my $slot = $attribute->name;
157 $class->add_method($method_name => sub{
158 delete $_[0]->{$slot};
163 sub _install_handles {
164 my (undef, $attribute, $handles, $class) = @_;
166 my $reader = $attribute->reader || $attribute->accessor
167 or $class->throw_error("You must pass a reader method for '".$attribute->name."'");
169 my %handles = $attribute->_canonicalize_handles($handles);
171 foreach my $handle_name (keys %handles) {
172 my $method_to_call = $handles{$handle_name};
175 my $instance = shift;
176 my $proxy = $instance->$reader();
178 my $error = !defined($proxy) ? ' is not defined'
179 : ref($proxy) && !blessed($proxy) ? qq{ is not an object (got '$proxy')}
182 $instance->meta->throw_error(
183 "Cannot delegate $handle_name to $method_to_call because "
189 $proxy->$method_to_call(@_);
191 $class->add_method($handle_name => $code);