package Mouse::Meta::Attribute;
use strict;
use warnings;
-require overload;
use Carp 'confess';
use Scalar::Util ();
use Mouse::Meta::TypeConstraint;
-use Mouse::Meta::Method::Accessor;
sub new {
my ($class, $name, %options) = @_;
$_[0]->{_create_args}
}
-sub inlined_name {
+sub _inlined_name {
my $self = shift;
- my $name = $self->name;
- my $key = "'" . $name . "'";
- return $key;
+ return sprintf '"%s"', quotemeta $self->name;
}
-sub generate_predicate {
+sub _generate_accessor{
+ my ($attribute) = @_;
+
+ my $name = $attribute->name;
+ my $default = $attribute->default;
+ my $constraint = $attribute->type_constraint;
+ my $builder = $attribute->builder;
+ 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 $compiled_type_constraint = $constraint ? $constraint->{_compiled_type_constraint} : undef;
+
+ my $self = '$_[0]';
+ my $key = $attribute->_inlined_name;
+
+ my $accessor =
+ '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
+ "sub {\n";
+ if ($attribute->_is_metadata eq 'rw') {
+ $accessor .=
+ '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
+ 'if (scalar(@_) >= 2) {' . "\n";
+
+ my $value = '$_[1]';
+
+ if ($constraint) {
+ if ($should_coerce) {
+ $accessor .=
+ "\n".
+ '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
+ 'my $val = Mouse::Util::TypeConstraints->typecast_constraints("'.$attribute->associated_class->name.'", $attribute->{type_constraint}, '.$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";
+ }
+ }
+
+ # 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.'} = '.$value.';' . "\n";
+
+ if ($is_weak) {
+ $accessor .= 'Scalar::Util::weaken('.$self.'->{'.$key.'}) if ref('.$self.'->{'.$key.'});' . "\n";
+ }
+
+ if ($trigger) {
+ $accessor .= '$trigger->('.$self.', '.$value.');' . "\n";
+ }
+
+ $accessor .= "}\n";
+ }
+ else {
+ $accessor .= 'Carp::confess("Cannot assign a value to a read-only accessor") if scalar(@_) >= 2;' . "\n";
+ }
+
+ if ($attribute->is_lazy) {
+ $accessor .= $self.'->{'.$key.'} = ';
+
+ $accessor .= $attribute->has_builder
+ ? $self.'->$builder'
+ : ref($default) eq 'CODE'
+ ? '$default->('.$self.')'
+ : '$default';
+ $accessor .= ' if !exists '.$self.'->{'.$key.'};' . "\n";
+ }
+
+ if ($should_deref) {
+ if (ref($constraint) && $constraint->name =~ '^ArrayRef\b') {
+ $accessor .= 'if (wantarray) {
+ return @{ '.$self.'->{'.$key.'} || [] };
+ }';
+ }
+ else {
+ $accessor .= 'if (wantarray) {
+ return %{ '.$self.'->{'.$key.'} || {} };
+ }';
+ }
+ }
+
+ $accessor .= 'return '.$self.'->{'.$key.'};
+ }';
+
+ my $sub = eval $accessor;
+ $attribute->throw_error($@) if $@;
+ return $sub;
+}
+
+
+sub _generate_predicate {
my $attribute = shift;
- my $key = $attribute->inlined_name;
+ my $key = $attribute->_inlined_name;
my $predicate = 'sub { exists($_[0]->{'.$key.'}) }';
my $sub = eval $predicate;
- confess $@ if $@;
+ $attribute->throw_error($@) if $@;
return $sub;
}
-sub generate_clearer {
+sub _generate_clearer {
my $attribute = shift;
- my $key = $attribute->inlined_name;
+ my $key = $attribute->_inlined_name;
my $clearer = 'sub { delete($_[0]->{'.$key.'}) }';
my $sub = eval $clearer;
- confess $@ if $@;
+ $attribute->throw_error($@) if $@;
return $sub;
}
-sub generate_handles {
+sub _generate_handles {
my $attribute = shift;
my $reader = $attribute->name;
my %handles = $attribute->_canonicalize_handles($attribute->handles);
}';
$method_map{$local_method} = eval $method;
- confess $@ if $@;
+ $attribute->throw_error($@) if $@;
}
return \%method_map;
if exists $args{coerce};
if (exists $args{isa}) {
- confess "Got isa => $args{isa}, but Mouse does not yet support parameterized types for containers other than ArrayRef and HashRef (rt.cpan.org #39795)"
- if $args{isa} =~ /^([^\[]+)\[.+\]$/ &&
- $1 ne 'ArrayRef' &&
- $1 ne 'HashRef' &&
- $1 ne 'Maybe'
- ;
-
my $type_constraint = delete $args{isa};
$args{type_constraint}= Mouse::Util::TypeConstraints::find_or_create_isa_type_constraint($type_constraint);
}
$class->add_attribute($attribute);
+ my $associated_methods = 0;
+
+ my $is_metadata = $attribute->_is_metadata || '';
+
# install an accessor
- if ($attribute->_is_metadata eq 'rw' || $attribute->_is_metadata eq 'ro') {
- my $code = Mouse::Meta::Method::Accessor->generate_accessor_method_inline(
- $attribute,
- );
+ if ($is_metadata eq 'rw' || $is_metadata eq 'ro') {
+ my $code = $attribute->_generate_accessor();
$class->add_method($name => $code);
+ $associated_methods++;
}
for my $method (qw/predicate clearer/) {
my $predicate = "has_$method";
if ($attribute->$predicate) {
- my $generator = "generate_$method";
+ my $generator = "_generate_$method";
my $coderef = $attribute->$generator;
$class->add_method($attribute->$method => $coderef);
+ $associated_methods++;
}
}
if ($attribute->has_handles) {
- my $method_map = $attribute->generate_handles;
+ my $method_map = $attribute->_generate_handles;
for my $method_name (keys %$method_map) {
$class->add_method($method_name => $method_map->{$method_name});
+ $associated_methods++;
}
}
+ if($associated_methods == 0 && $is_metadata ne 'bare'){
+ Carp::cluck(qq{Attribute ($name) of class }.$class->name.qq{ has no associated methods (did you mean to provide an "is" argument?)});
+
+ }
+
return $attribute;
}
my $name = shift;
my $args = shift;
- confess "You can not use lazy_build and default for the same attribute ($name)"
+ $self->throw_error("You can not use lazy_build and default for the same attribute ($name)")
if $args->{lazy_build} && exists $args->{default};
- confess "You cannot have lazy attribute ($name) without specifying a default value for it"
+ $self->throw_error("You cannot have lazy attribute ($name) without specifying a default value for it")
if $args->{lazy}
&& !exists($args->{default})
&& !exists($args->{builder});
- confess "References are not allowed as default values, you must wrap the default of '$name' in a CODE reference (ex: sub { [] } and not [])"
+ $self->throw_error("References are not allowed as default values, you must wrap the default of '$name' in a CODE reference (ex: sub { [] } and not [])")
if ref($args->{default})
&& ref($args->{default}) ne 'CODE';
- confess "You cannot auto-dereference without specifying a type constraint on attribute ($name)"
+ $self->throw_error("You cannot auto-dereference without specifying a type constraint on attribute ($name)")
if $args->{auto_deref} && !exists($args->{isa});
- confess "You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute ($name)"
+ $self->throw_error("You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute ($name)")
if $args->{auto_deref}
- && $args->{isa} ne 'ArrayRef'
- && $args->{isa} ne 'HashRef';
+ && $args->{isa} !~ /^(?:ArrayRef|HashRef)(?:\[.*\])?$/;
if ($args->{trigger}) {
if (ref($args->{trigger}) eq 'HASH') {
- Carp::carp "HASH-based form of trigger has been removed. Only the coderef form of triggers are now supported.";
+ $self->throw_error("HASH-based form of trigger has been removed. Only the coderef form of triggers are now supported.");
}
- confess "Trigger must be a CODE ref on attribute ($name)"
+ $self->throw_error("Trigger must be a CODE ref on attribute ($name)")
if ref($args->{trigger}) ne 'CODE';
}
}
sub verify_against_type_constraint {
- return 1 unless $_[0]->{type_constraint};
+ my ($self, $value) = @_;
+ my $tc = $self->type_constraint;
+ return 1 unless $tc;
- local $_ = $_[1];
- return 1 if $_[0]->{type_constraint}->check($_);
+ local $_ = $value;
+ return 1 if $tc->check($value);
- my $self = shift;
- $self->verify_type_constraint_error($self->name, $_, $self->{type_constraint});
+ $self->verify_type_constraint_error($self->name, $value, $tc);
}
sub verify_type_constraint_error {
my($self, $name, $value, $type) = @_;
- $type = ref($type) eq 'ARRAY' ? join '|', map { $_->name } @{ $type } : $type->name;
- my $display = defined($value) ? overload::StrVal($value) : 'undef';
- Carp::confess("Attribute ($name) does not pass the type constraint because: Validation failed for \'$type\' failed with value $display");
+ $self->throw_error("Attribute ($name) does not pass the type constraint because: " . $type->get_message($value));
}
sub coerce_constraint { ## my($self, $value) = @_;
return map { $_ => $_ } @$handles;
}
else {
- confess "Unable to canonicalize the 'handles' option with $handles";
+ $self->throw_error("Unable to canonicalize the 'handles' option with $handles");
}
}
return %{ $super_attr->_create_args };
}
- confess "Could not find an attribute by the name of '$name' to inherit from";
+ $self->throw_error("Could not find an attribute by the name of '$name' to inherit from");
+}
+
+sub throw_error{
+ my $self = shift;
+
+ my $metaclass = (ref $self && $self->associated_class) || 'Mouse::Meta::Class';
+ $metaclass->throw_error(@_, depth => 1);
}
1;
Informational methods.
-=head2 generate_accessor -> CODE
-
-Creates a new code reference for the attribute's accessor.
-
-=head2 generate_predicate -> CODE
-
-Creates a new code reference for the attribute's predicate.
-
-=head2 generate_clearer -> CODE
-
-Creates a new code reference for the attribute's clearer.
-
-=head2 generate_handles -> { MethodName => CODE }
-
-Creates a new code reference for each of the attribute's handles methods.
-
=head2 verify_against_type_constraint Item -> 1 | ERROR
Checks that the given value passes this attribute's type constraint. Returns 1
projects / gitmo/Mouse.git / blobdiff