package Mouse::Meta::Method::Constructor;
use strict;
use warnings;
sub generate_constructor_method_inline {
my ($class, $meta) = @_;
my $associated_metaclass_name = $meta->name;
my @attrs = $meta->get_all_attributes;
my $buildall = $class->_generate_BUILDALL($meta);
my $buildargs = $class->_generate_BUILDARGS($meta);
my $processattrs = $class->_generate_processattrs($meta, \@attrs);
my @compiled_constraints = map { $_ ? $_->{_compiled_type_constraint} : undef } map { $_->{type_constraint} } @attrs;
my $code = <<"...";
sub {
my \$class = shift;
return \$class->Mouse::Object::new(\@_)
if \$class ne '$associated_metaclass_name';
$buildargs;
my \$instance = bless {}, \$class;
$processattrs;
$buildall;
return \$instance;
}
...
local $@;
# warn $code;
my $res = eval $code;
die $@ if $@;
$res;
}
sub _generate_processattrs {
my ($class, $meta, $attrs) = @_;
my @res;
for my $index (0 .. @$attrs - 1) {
my $attr = $attrs->[$index];
my $key = $attr->name;
my $code = '';
if (defined $attr->init_arg) {
my $from = $attr->init_arg;
$code .= "if (exists \$args->{'$from'}) {\n";
if ($attr->should_coerce && $attr->type_constraint) {
$code .= "my \$value = Mouse::Util::TypeConstraints->typecast_constraints('".$attr->associated_class->name."', \$attrs[$index]->{type_constraint}, \$args->{'$from'});\n";
}
else {
$code .= "my \$value = \$args->{'$from'};\n";
}
if ($attr->has_type_constraint) {
if ($attr->type_constraint->{_compiled_type_constraint}) {
$code .= "unless (\$compiled_constraints[$index](\$value)) {";
} else {
$code .= "unless (\$attrs[$index]->{type_constraint}->check(\$value)) {";
}
$code .= "
\$attrs[$index]->verify_type_constraint_error(
'$key', \$value, \$attrs[$index]->type_constraint
)
}
";
}
$code .= "\$instance->{'$key'} = \$value;\n";
if ($attr->is_weak_ref) {
$code .= "Scalar::Util::weaken( \$instance->{'$key'} ) if ref( \$value );\n";
}
if ($attr->has_trigger) {
$code .= "\$attrs[$index]->{trigger}->( \$instance, \$value );\n";
}
$code .= "\n} else {\n";
}
if ($attr->has_default || $attr->has_builder) {
unless ($attr->is_lazy) {
my $default = $attr->default;
my $builder = $attr->builder;
$code .= "my \$value = ";
if ($attr->should_coerce && $attr->type_constraint) {
$code .= "Mouse::Util::TypeConstraints->typecast_constraints('".$attr->associated_class->name."', \$attrs[$index]->{type_constraint}, ";
}
if ($attr->has_builder) {
$code .= "\$instance->$builder";
}
elsif (ref($default) eq 'CODE') {
$code .= "\$attrs[$index]->{default}->(\$instance)";
}
elsif (!defined($default)) {
$code .= 'undef';
}
elsif ($default =~ /^\-?[0-9]+(?:\.[0-9]+)$/) {
$code .= $default;
}
else {
$code .= "'$default'";
}
if ($attr->should_coerce) {
$code .= ");\n";
}
else {
$code .= ";\n";
}
if ($attr->has_type_constraint) {
$code .= "{
unless (\$attrs[$index]->{type_constraint}->check(\$value)) {
\$attrs[$index]->verify_type_constraint_error('$key', \$value, \$attrs[$index]->type_constraint)
}
}";
}
$code .= "\$instance->{'$key'} = \$value;\n";
if ($attr->is_weak_ref) {
$code .= "Scalar::Util::weaken( \$instance->{'$key'} ) if ref( \$value );\n";
}
}
}
elsif ($attr->is_required) {
$code .= "Carp::confess('Attribute ($key) is required');";
}
$code .= "}\n" if defined $attr->init_arg;
push @res, $code;
}
return join "\n", @res;
}
sub _generate_BUILDARGS {
my $self = shift;
my $meta = shift;
if ($meta->name->can('BUILDARGS') && $meta->name->can('BUILDARGS') != Mouse::Object->can('BUILDARGS')) {
return 'my $args = $class->BUILDARGS(@_)';
}
return <<'...';
my $args;
if ( scalar @_ == 1 ) {
( ref( $_[0] ) eq 'HASH' )
|| Carp::confess "Single parameters to new() must be a HASH ref";
$args = +{ %{ $_[0] } };
}
else {
$args = +{@_};
}
...
}
sub _generate_BUILDALL {
my ($class, $meta) = @_;
return '' unless $meta->name->can('BUILD');
my @code = ();
push @code, q{no strict 'refs';};
push @code, q{no warnings 'once';};
no strict 'refs';
no warnings 'once';
for my $klass ($meta->linearized_isa) {
if (*{ $klass . '::BUILD' }{CODE}) {
unshift @code, qq{${klass}::BUILD(\$instance, \$args);};
}
}
return join "\n", @code;
}
1;