package Mouse::Meta::Method::Accessor;
-use strict;
-use warnings;
-use Carp ();
+use Mouse::Util; # enables strict and warnings
+use Scalar::Util qw(blessed);
-# internal use only. do not call directly
-sub generate_accessor_method_inline {
- my ($class, $attribute) = @_;
+sub _generate_accessor{
+ my (undef, $attribute, $class, $type) = @_;
my $name = $attribute->name;
my $default = $attribute->default;
my $trigger = $attribute->trigger;
my $is_weak = $attribute->is_weak_ref;
my $should_deref = $attribute->should_auto_deref;
- my $should_coerce = $attribute->should_coerce;
+ my $should_coerce = (defined($constraint) && $constraint->has_coercion && $attribute->should_coerce);
- my $compiled_type_constraint = $constraint ? $constraint->{_compiled_type_constraint} : undef;
+ my $compiled_type_constraint = defined($constraint) ? $constraint->_compiled_type_constraint : undef;
my $self = '$_[0]';
- my $key = $attribute->inlined_name;
+ my $key = "q{$name}";
+ my $slot = "$self\->{$key}";
- my $accessor =
- '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
- "sub {\n";
- if ($attribute->_is_metadata eq 'rw') {
- $accessor .=
- '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
- 'if (@_ >= 2) {' . "\n";
+ $type ||= 'accessor';
+ my $accessor = sprintf(qq{#line 1 "%s for %s (%s)"\n}, $type, $name, __FILE__)
+ . "sub {\n";
+
+ if ($type eq 'accessor' || $type eq 'writer') {
+ if($type eq 'accessor'){
+ $accessor .=
+ 'if (scalar(@_) >= 2) {' . "\n";
+ }
+ else{ # writer
+ $accessor .=
+ 'if(@_ < 2){ Carp::confess("Not enough arguments for the writer of '.$name.'") }'.
+ '{' . "\n";
+ }
+
my $value = '$_[1]';
- if ($constraint) {
- $accessor .= 'my $val = ';
+ if (defined $constraint) {
if ($should_coerce) {
$accessor .=
"\n".
- '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
- 'Mouse::Util::TypeConstraints->typecast_constraints("'.$attribute->associated_class->name.'", $attribute->{type_constraint}, '.$value.');';
- } else {
- $accessor .= $value.';';
- }
- if ($compiled_type_constraint) {
- $accessor .=
- "\n".
- '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
- 'unless ($compiled_type_constraint->($val)) {
- $attribute->verify_type_constraint_error($name, $val, $attribute->{type_constraint});
- }' . "\n";
- } else {
- $accessor .=
- "\n".
- '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
- 'unless ($constraint->check($val)) {
- $attribute->verify_type_constraint_error($name, $val, $attribute->{type_constraint});
- }' . "\n";
+ 'my $val = $constraint->coerce('.$value.');';
+ $value = '$val';
}
- $value = '$val';
+ $accessor .=
+ "\n".
+ '$compiled_type_constraint->('.$value.') or
+ $attribute->verify_type_constraint_error($name, '.$value.', $constraint);' . "\n";
}
# if there's nothing left to do for the attribute we can return during
# this setter
$accessor .= 'return ' if !$is_weak && !$trigger && !$should_deref;
- $accessor .= $self.'->{'.$key.'} = '.$value.';' . "\n";
+ $accessor .= "$slot = $value;\n";
if ($is_weak) {
- $accessor .= 'Scalar::Util::weaken('.$self.'->{'.$key.'}) if ref('.$self.'->{'.$key.'});' . "\n";
+ $accessor .= "Scalar::Util::weaken($slot) if ref $slot;\n";
}
if ($trigger) {
$accessor .= "}\n";
}
- else {
+ elsif($type eq 'reader') {
$accessor .= 'Carp::confess("Cannot assign a value to a read-only accessor") if scalar(@_) >= 2;' . "\n";
}
+ else{
+ $class->throw_error("Unknown accessor type '$type'");
+ }
if ($attribute->is_lazy) {
- $accessor .= $self.'->{'.$key.'} = ';
-
- $accessor .= $attribute->has_builder
- ? $self.'->$builder'
- : ref($default) eq 'CODE'
- ? '$default->('.$self.')'
- : '$default';
- $accessor .= ' if !exists '.$self.'->{'.$key.'};' . "\n";
+ my $value;
+
+ if (defined $builder){
+ $value = "$self->\$builder()";
+ }
+ elsif (ref($default) eq 'CODE'){
+ $value = "$self->\$default()";
+ }
+ else{
+ $value = '$default';
+ }
+
+ $accessor .= "if(!exists $slot){\n";
+ if($should_coerce){
+ $accessor .= "$slot = \$constraint->coerce($value)";
+ }
+ elsif(defined $constraint){
+ $accessor .= "my \$tmp = $value;\n";
+ #XXX: The following 'defined and' check is for backward compatibility
+ $accessor .= "defined(\$tmp) and ";
+
+ $accessor .= "\$compiled_type_constraint->(\$tmp)";
+ $accessor .= " || \$attribute->verify_type_constraint_error(\$name, \$tmp, \$constraint);\n";
+ $accessor .= "$slot = \$tmp;\n";
+ }
+ else{
+ $accessor .= "$slot = $value;\n";
+ }
+ $accessor .= "}\n";
}
if ($should_deref) {
- if (ref($constraint) && $constraint->name eq 'ArrayRef') {
- $accessor .= 'if (wantarray) {
- return @{ '.$self.'->{'.$key.'} || [] };
- }';
+ if ($constraint->is_a_type_of('ArrayRef')) {
+ $accessor .= "return \@{ $slot || [] } if wantarray;\n";
}
- else {
- $accessor .= 'if (wantarray) {
- return %{ '.$self.'->{'.$key.'} || {} };
- }';
+ elsif($constraint->is_a_type_of('HashRef')){
+ $accessor .= "return \%{ $slot || {} } if wantarray;\n";
+ }
+ else{
+ $class->throw_error("Can not auto de-reference the type constraint " . $constraint->name);
}
}
- $accessor .= 'return '.$self.'->{'.$key.'};
- }';
+ $accessor .= "return $slot;\n}\n";
+
+ #print "# class ", $class->name, "\n", $accessor, "\n";
+ my $code;
+ my $e = do{
+ local $@;
+ $code = eval $accessor;
+ $@;
+ };
+ die $e if $e;
- my $sub = eval $accessor;
- Carp::confess($@) if $@;
- return $sub;
+ return $code;
}
+sub _generate_reader{
+ my $class = shift;
+ return $class->_generate_accessor(@_, 'reader');
+}
+
+sub _generate_writer{
+ my $class = shift;
+ return $class->_generate_accessor(@_, 'writer');
+}
+
+
+sub _generate_predicate {
+ my (undef, $attribute, $class) = @_;
+
+ my $slot = $attribute->name;
+ return sub{
+ return exists $_[0]->{$slot};
+ };
+}
+
+sub _generate_clearer {
+ my (undef, $attribute, $class) = @_;
+
+ my $slot = $attribute->name;
+
+ return sub{
+ delete $_[0]->{$slot};
+ };
+}
+
+sub _generate_delegation{
+ my (undef, $attribute, $class, $reader, $handle_name, $method_to_call) = @_;
+
+ return sub {
+ my $instance = shift;
+ my $proxy = $instance->$reader();
+
+ my $error = !defined($proxy) ? ' is not defined'
+ : ref($proxy) && !blessed($proxy) ? qq{ is not an object (got '$proxy')}
+ : undef;
+ if ($error) {
+ $instance->meta->throw_error(
+ "Cannot delegate $handle_name to $method_to_call because "
+ . "the value of "
+ . $attribute->name
+ . $error
+ );
+ }
+ $proxy->$method_to_call(@_);
+ };
+}
+
+
1;
+__END__
+
+=head1 NAME
+
+Mouse::Meta::Method::Accessor - A Mouse method generator for accessors
+
+=head1 VERSION
+
+This document describes Mouse version 0.39
+
+=head1 SEE ALSO
+
+L<Moose::Meta::Method::Accessor>
+
+=cut
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