1 package Mouse::Meta::Method::Constructor;
5 sub _generate_constructor_method {
6 my ($class, $metaclass, $args) = @_;
8 my $associated_metaclass_name = $metaclass->name;
9 my @attrs = $metaclass->get_all_attributes;
11 my $buildall = $class->_generate_BUILDALL($metaclass);
12 my $buildargs = $class->_generate_BUILDARGS($metaclass);
13 my $processattrs = $class->_generate_processattrs($metaclass, \@attrs);
15 my @compiled_constraints = map { $_ ? $_->_compiled_type_constraint : undef }
16 map { $_->type_constraint } @attrs;
18 my $constructor_name = defined($args->{constructor_name})
19 ? $associated_metaclass_name . '::' . $args->{constructor_name}
22 my $code = sprintf("#line %d %s\n", __LINE__, __FILE__).<<"...";
23 sub $constructor_name \{
25 return \$class->Mouse::Object::new(\@_)
26 if \$class ne q{$associated_metaclass_name};
28 my \$instance = bless {}, \$class;
41 sub _generate_processattrs {
42 my ($class, $metaclass, $attrs) = @_;
47 for my $index (0 .. @$attrs - 1) {
48 my $attr = $attrs->[$index];
49 my $key = $attr->name;
52 if (defined $attr->init_arg) {
53 my $from = $attr->init_arg;
55 $code .= "if (exists \$args->{q{$from}}) {\n";
57 my $value = "\$args->{q{$from}}";
58 if(my $type_constraint = $attr->type_constraint){
59 if($attr->should_coerce && $type_constraint->has_coercion){
60 $code .= "my \$value = \$attrs[$index]->{type_constraint}->coerce(\$args->{q{$from}});\n";
64 $code .= "\$compiled_constraints[$index]->($value)\n";
65 $code .= " or \$attrs[$index]->verify_type_constraint_error(q{$key}, $value, \$attrs[$index]->{type_constraint});\n";
68 $code .= "\$instance->{q{$key}} = $value;\n";
70 if ($attr->is_weak_ref) {
71 $code .= "Scalar::Util::weaken( \$instance->{q{$key}} ) if ref($value);\n";
74 if ($attr->has_trigger) {
76 $code .= "push \@triggers, [\$attrs[$index]->{trigger}, $value];\n";
79 $code .= "\n} else {\n";
82 if ($attr->has_default || $attr->has_builder) {
83 unless ($attr->is_lazy) {
84 my $default = $attr->default;
85 my $builder = $attr->builder;
87 $code .= "my \$value = ";
89 if ($attr->should_coerce && $attr->type_constraint) {
90 $code .= "\$attrs[$index]->_coerce_and_verify(";
93 if ($attr->has_builder) {
94 $code .= "\$instance->$builder()";
96 elsif (ref($default) eq 'CODE') {
97 $code .= "\$attrs[$index]->{default}->(\$instance)";
99 elsif (!defined($default)) {
102 elsif ($default =~ /^\-?[0-9]+(?:\.[0-9]+)$/) {
106 $code .= "'$default'";
109 if ($attr->should_coerce) {
116 if ($attr->has_type_constraint) {
118 unless (\$attrs[$index]->{type_constraint}->check(\$value)) {
119 \$attrs[$index]->verify_type_constraint_error(q{$key}, \$value, \$attrs[$index]->type_constraint)
124 $code .= "\$instance->{q{$key}} = \$value;\n";
126 if ($attr->is_weak_ref) {
127 $code .= "Scalar::Util::weaken( \$instance->{q{$key}} ) if ref( \$value );\n";
131 elsif ($attr->is_required) {
132 $code .= "Carp::confess('Attribute ($key) is required');";
135 $code .= "}\n" if defined $attr->init_arg;
140 if($metaclass->is_anon_class){
141 push @res, q{$instnace->{__METACLASS__} = $metaclass;};
145 unshift @res, q{my @triggers;};
146 push @res, q{$_->[0]->($instance, $_->[1]) for @triggers;};
149 return join "\n", @res;
152 sub _generate_BUILDARGS {
153 my($self, $metaclass) = @_;
155 if ($metaclass->name->can('BUILDARGS') && $metaclass->name->can('BUILDARGS') != \&Mouse::Object::BUILDARGS) {
156 return 'my $args = $class->BUILDARGS(@_)';
161 if ( scalar @_ == 1 ) {
162 ( ref( $_[0] ) eq 'HASH' )
163 || Carp::confess "Single parameters to new() must be a HASH ref";
164 $args = +{ %{ $_[0] } };
172 sub _generate_BUILDALL {
173 my ($class, $metaclass) = @_;
175 return '' unless $metaclass->name->can('BUILD');
178 for my $class ($metaclass->linearized_isa) {
182 if (*{ $class . '::BUILD' }{CODE}) {
183 unshift @code, qq{${class}::BUILD(\$instance, \$args);};
186 return join "\n", @code;