package Mouse::Meta::Attribute;
use strict;
use warnings;
-require overload;
use Carp 'confess';
use Scalar::Util ();
+use Mouse::Meta::TypeConstraint;
sub new {
my ($class, $name, %options) = @_;
sub is_weak_ref { $_[0]->{weak_ref} }
sub init_arg { $_[0]->{init_arg} }
sub type_constraint { $_[0]->{type_constraint} }
+sub find_type_constraint {
+ Carp::carp("This method was deprecated");
+ $_[0]->type_constraint();
+}
sub trigger { $_[0]->{trigger} }
sub builder { $_[0]->{builder} }
sub should_auto_deref { $_[0]->{auto_deref} }
sub should_coerce { $_[0]->{should_coerce} }
-sub find_type_constraint { $_[0]->{find_type_constraint} }
sub has_default { exists $_[0]->{default} }
sub has_predicate { exists $_[0]->{predicate} }
$_[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_accessor {
- my $attribute = shift;
+sub _generate_accessor{
+ my ($attribute) = @_;
my $name = $attribute->name;
my $default = $attribute->default;
- my $constraint = $attribute->find_type_constraint;
+ 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 $key = $attribute->_inlined_name;
- my $accessor = "sub {\n";
+ my $accessor =
+ '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
+ "sub {\n";
if ($attribute->_is_metadata eq 'rw') {
- $accessor .= 'if (@_ >= 2) {' . "\n";
+ $accessor .=
+ '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
+ 'if (scalar(@_) >= 2) {' . "\n";
my $value = '$_[1]';
if ($constraint) {
- $accessor .= 'my $val = ';
if ($should_coerce) {
- $accessor .= 'Mouse::Util::TypeConstraints->typecast_constraints("'.$attribute->associated_class->name.'", $attribute->{find_type_constraint}, $attribute->{type_constraint}, '.$value.');';
+ $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 .= $value.';';
+ $accessor .=
+ "\n".
+ '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
+ 'unless ($constraint->check('.$value.')) {
+ $attribute->verify_type_constraint_error($name, '.$value.', $attribute->{type_constraint});
+ }' . "\n";
}
- $accessor .= '
- unless ($constraint->($val)) {
- $attribute->verify_type_constraint_error($name, $val, $attribute->type_constraint);
- }' . "\n";
- $value = '$val';
}
# if there's nothing left to do for the attribute we can return during
$accessor .= "}\n";
}
else {
- $accessor .= 'confess "Cannot assign a value to a read-only accessor" if scalar(@_) >= 2;' . "\n";
+ $accessor .= 'Carp::confess("Cannot assign a value to a read-only accessor") if scalar(@_) >= 2;' . "\n";
}
if ($attribute->is_lazy) {
}
if ($should_deref) {
- my $type_constraint = $attribute->type_constraint;
- if (!ref($type_constraint) && $type_constraint eq 'ArrayRef') {
+ if (ref($constraint) && $constraint->name =~ '^ArrayRef\b') {
$accessor .= 'if (wantarray) {
return @{ '.$self.'->{'.$key.'} || [] };
}';
}';
my $sub = eval $accessor;
- confess $@ if $@;
+ Carp::confess($@) if $@;
return $sub;
}
-sub generate_predicate {
+
+sub _generate_predicate {
my $attribute = shift;
- my $key = $attribute->inlined_name;
+ my $key = $attribute->_inlined_name;
my $predicate = 'sub { exists($_[0]->{'.$key.'}) }';
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.'}) }';
return $sub;
}
-sub generate_handles {
+sub _generate_handles {
my $attribute = shift;
my $reader = $attribute->name;
my %handles = $attribute->_canonicalize_handles($attribute->handles);
return \%method_map;
}
-my $optimized_constraints;
-sub _build_type_constraint {
- my $spec = shift;
- $optimized_constraints ||= Mouse::Util::TypeConstraints->optimized_constraints;
- my $code;
- if ($spec =~ /^([^\[]+)\[(.+)\]$/) {
- # parameterized
- my $constraint = $1;
- my $param = $2;
- my $parent = _build_type_constraint($constraint);
- my $child = _build_type_constraint($param);
- if ($constraint eq 'ArrayRef') {
- my $code_str =
- "sub {\n" .
- " if (\$parent->(\$_)) {\n" .
- " foreach my \$e (@\$_) {\n" .
- " local \$_ = \$e;\n" .
- " return () unless \$child->(\$_);\n" .
- " }\n" .
- " return 1;\n" .
- " }\n" .
- " return ();\n" .
- "};\n"
- ;
- $code = eval $code_str or Carp::confess($@);
- } elsif ($constraint eq 'HashRef') {
- my $code_str =
- "sub {\n" .
- " if (\$parent->(\$_)) {\n" .
- " foreach my \$e (values %\$_) {\n" .
- " local \$_ = \$e;\n" .
- " return () unless \$child->(\$_);\n" .
- " }\n" .
- " return 1;\n" .
- " }\n" .
- " return ();\n" .
- "};\n"
- ;
- $code = eval $code_str or Carp::confess($@);
- } else {
- Carp::confess("Support for parameterized types other than ArrayRef or HashRef is not implemented yet");
- }
- $optimized_constraints->{$spec} = $code;
- } else {
- $code = $optimized_constraints->{ $spec };
- if (! $code) {
- $code = sub { Scalar::Util::blessed($_[0]) && $_[0]->isa($spec) };
- $optimized_constraints->{$spec} = $code;
- }
- }
- return $code;
-}
-
sub create {
my ($self, $class, $name, %args) = @_;
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 'HashRef' &&
+ $1 ne 'Maybe'
+ ;
my $type_constraint = delete $args{isa};
- $type_constraint =~ s/\s//g;
- my @type_constraints = split /\|/, $type_constraint;
-
- my $code;
- if (@type_constraints == 1) {
- $code = _build_type_constraint($type_constraints[0]);
- $args{type_constraint} = $type_constraints[0];
- } else {
- my @code_list = map {
- _build_type_constraint($_)
- } @type_constraints;
- $code = sub {
- local $_ = $_[0];
- for my $code (@code_list) {
- return 1 if $code->($_);
- }
- return 0;
- };
- $args{type_constraint} = \@type_constraints;
- }
- $args{find_type_constraint} = $code;
+ $args{type_constraint}= Mouse::Util::TypeConstraints::find_or_create_isa_type_constraint($type_constraint);
}
my $attribute = $self->new($name, %args);
$class->add_attribute($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 $accessor = $attribute->generate_accessor;
- $class->add_method($name => $accessor);
+ if ($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 && $is_metadata ne 'bare'){
+ confess(qq{Attribute ($name) of class }.$class->name.qq{ has no associated methods (did you mean to provide an "is" argument?)});
+ }
+
return $attribute;
}
confess "You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute ($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') {
}
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 $_[0]->{find_type_constraint}->($_);
+ 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 '|', @{ $type } : $type;
- 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 $display");
+ Carp::confess("Attribute ($name) does not pass the type constraint because: " . $type->get_message($value));
}
sub coerce_constraint { ## my($self, $value) = @_;
my $type = $_[0]->{type_constraint}
or return $_[1];
- return Mouse::Util::TypeConstraints->typecast_constraints($_[0]->associated_class->name, $_[0]->find_type_constraint, $type, $_[1]);
+ return Mouse::Util::TypeConstraints->typecast_constraints($_[0]->associated_class->name, $_[0]->type_constraint, $_[1]);
}
sub _canonicalize_handles {
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 find_type_constraint -> CODE
-
-Returns a code reference which can be used to check that a given value passes
-this attribute's type constraint;
-
=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