package Mouse::Meta::Method::Accessor;
-use strict;
-use warnings;
-use Scalar::Util qw(blessed);
+use Mouse::Util qw(:meta); # enables strict and warnings
+use warnings FATAL => 'recursion';
-sub _install_accessor{
- my (undef, $attribute, $method_name, $class, $type) = @_;
+
+sub _inline_slot{
+ my(undef, $self_var, $attr_name) = @_;
+ return sprintf '%s->{q{%s}}', $self_var, $attr_name;
+}
+
+sub _generate_accessor_any{
+ my($method_class, $type, $attribute, $class) = @_;
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 = sprintf q{"%s"}, quotemeta $name;
+ my $slot = $method_class->_inline_slot($self, $name);;
- $type ||= 'accessor';
+ my $accessor = sprintf(qq{package %s;\n#line 1 "%s-accessor for %s (%s)"\n}, $class->name, $type, $name, __FILE__)
+ . "sub {\n";
- my $accessor =
- '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
- "sub {\n";
- if ($type eq 'accessor' || $type eq 'writer') {
- if($type eq 'accessor'){
+ if ($type eq 'rw' || $type eq 'wo') {
+ if($type eq 'rw'){
$accessor .=
- '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
'if (scalar(@_) >= 2) {' . "\n";
}
else{ # writer
$accessor .=
- '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
- 'if(@_ < 2){ Carp::confess("Not enough arguments for writer '.$method_name.'") }'.
+ 'if(@_ < 2){ Carp::confess("Not enough arguments for the writer of '.$name.'") }'.
'{' . "\n";
}
my $value = '$_[1]';
- if ($constraint) {
- if(!$compiled_type_constraint){
- Carp::confess("[BUG]Missing compiled type constraint for $constraint");
- }
+ if (defined $constraint) {
if ($should_coerce) {
$accessor .=
"\n".
- '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
'my $val = $constraint->coerce('.$value.');';
$value = '$val';
}
- if ($compiled_type_constraint) {
- $accessor .=
- "\n".
- '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
- 'unless ($compiled_type_constraint->('.$value.')) {
- $attribute->verify_type_constraint_error($name, '.$value.', $attribute->{type_constraint});
- }' . "\n";
- } else {
- $accessor .=
- "\n".
- '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
- 'unless ($constraint->check('.$value.')) {
- $attribute->verify_type_constraint_error($name, '.$value.', $attribute->{type_constraint});
- }' . "\n";
- }
+ $accessor .=
+ "\n".
+ '$compiled_type_constraint->('.$value.') or
+ $attribute->_throw_type_constraint_error('.$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) {
$accessor .= "}\n";
}
- elsif($type eq 'reader') {
+ elsif($type eq 'ro') {
$accessor .= 'Carp::confess("Cannot assign a value to a read-only accessor") if scalar(@_) >= 2;' . "\n";
}
else{
}
if ($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";
+
+ $accessor .= "\$compiled_type_constraint->(\$tmp)";
+ $accessor .= " || \$attribute->_throw_type_constraint_error(\$tmp, \$constraint);\n";
+ $accessor .= "$slot = \$tmp;\n";
+ }
+ else{
+ $accessor .= "$slot = $value;\n";
+ }
+ if ($is_weak) {
+ $accessor .= "Scalar::Util::weaken($slot) if ref $slot;\n";
+ }
+ $accessor .= "}\n";
}
if ($should_deref) {
if ($constraint->is_a_type_of('ArrayRef')) {
- $accessor .= 'if (wantarray) {
- return @{ '.$self.'->{'.$key.'} || [] };
- }';
+ $accessor .= "return \@{ $slot || [] } if wantarray;\n";
}
elsif($constraint->is_a_type_of('HashRef')){
- $accessor .= 'if (wantarray) {
- return %{ '.$self.'->{'.$key.'} || {} };
- }';
+ $accessor .= "return \%{ $slot || {} } if wantarray;\n";
}
else{
$class->throw_error("Can not auto de-reference the type constraint " . $constraint->name);
}
}
- $accessor .= 'return '.$self.'->{'.$key."};\n}";
+ $accessor .= "return $slot;\n}\n";
#print $accessor, "\n";
- my $code = eval $accessor;
- $attribute->throw_error($@) if $@;
-
- $class->add_method($method_name => $code);
- return;
+ my $code;
+ my $e = do{
+ local $@;
+ $code = eval $accessor;
+ $@;
+ };
+ die $e if $e;
+
+ return $code;
}
-sub _install_reader{
+sub _generate_accessor{
my $class = shift;
- $class->_install_accessor(@_, 'reader');
- return;
+ return $class->_generate_accessor_any(rw => @_);
}
-sub _install_writer{
+sub _generate_reader {
my $class = shift;
- $class->_install_accessor(@_, 'writer');
- return;
+ return $class->_generate_accessor_any(ro => @_);
}
+sub _generate_writer {
+ my $class = shift;
+ return $class->_generate_accessor_any(wo => @_);
+}
-sub _install_predicate {
- my (undef, $attribute, $method_name, $class) = @_;
+sub _generate_predicate {
+ my (undef, $attribute, $class) = @_;
my $slot = $attribute->name;
-
- $class->add_method($method_name => sub{
+ return sub{
return exists $_[0]->{$slot};
- });
- return;
+ };
}
-sub _install_clearer {
- my (undef, $attribute, $method_name, $class) = @_;
+sub _generate_clearer {
+ my (undef, $attribute, $class) = @_;
my $slot = $attribute->name;
-
- $class->add_method($method_name => sub{
+ return sub{
delete $_[0]->{$slot};
- });
- return;
+ };
}
-sub _install_handles {
- my (undef, $attribute, $handles, $class) = @_;
+1;
+__END__
- my $reader = $attribute->reader || $attribute->accessor
- or $class->throw_error("You must pass a reader method for '".$attribute->name."'");
+=head1 NAME
- my %handles = $attribute->_canonicalize_handles($handles);
+Mouse::Meta::Method::Accessor - A Mouse method generator for accessors
- foreach my $handle_name (keys %handles) {
- my $method_to_call = $handles{$handle_name};
+=head1 VERSION
- my $code = sub {
- my $instance = shift;
- my $proxy = $instance->$reader();
+This document describes Mouse version 0.50_02
- 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(@_);
- };
- $class->add_method($handle_name => $code);
- }
- return;
-}
+=head1 SEE ALSO
+L<Moose::Meta::Method::Accessor>
-1;
+=cut
projects / gitmo/Mouse.git / blobdiff