-#!/usr/bin/env perl
package Mouse::Meta::Attribute;
use strict;
use warnings;
+require overload;
use Carp 'confess';
-use Scalar::Util qw/blessed weaken/;
+use Scalar::Util ();
+use Mouse::Meta::TypeConstraint;
sub new {
- my $class = shift;
- my %args = @_;
+ my ($class, $name, %options) = @_;
- my $name = $args{name};
+ $options{name} = $name;
- $args{init_arg} = $name
- unless exists $args{init_arg};
+ $options{init_arg} = $name
+ unless exists $options{init_arg};
- $args{is} ||= '';
+ $options{is} ||= '';
- bless \%args, $class;
+ bless \%options, $class;
}
-sub name { $_[0]->{name} }
-sub associated_class { $_[0]->{associated_class} }
-sub _is_metadata { $_[0]->{is} }
-sub is_required { $_[0]->{required} }
-sub default { $_[0]->{default} }
-sub is_lazy { $_[0]->{lazy} }
-sub is_lazy_build { $_[0]->{lazy_build} }
-sub predicate { $_[0]->{predicate} }
-sub clearer { $_[0]->{clearer} }
-sub handles { $_[0]->{handles} }
-sub is_weak_ref { $_[0]->{weak_ref} }
-sub init_arg { $_[0]->{init_arg} }
-sub type_constraint { $_[0]->{type_constraint} }
-sub trigger { $_[0]->{trigger} }
-sub builder { $_[0]->{builder} }
-sub should_auto_deref { $_[0]->{auto_deref} }
-
-sub has_default { exists $_[0]->{default} }
-sub has_predicate { exists $_[0]->{predicate} }
-sub has_clearer { exists $_[0]->{clearer} }
-sub has_handles { exists $_[0]->{handles} }
-sub has_type_constraint { exists $_[0]->{type_constraint} }
-sub has_trigger { exists $_[0]->{trigger} }
-sub has_builder { exists $_[0]->{builder} }
+sub name { $_[0]->{name} }
+sub associated_class { $_[0]->{associated_class} }
+sub _is_metadata { $_[0]->{is} }
+sub is_required { $_[0]->{required} }
+sub default { $_[0]->{default} }
+sub is_lazy { $_[0]->{lazy} }
+sub is_lazy_build { $_[0]->{lazy_build} }
+sub predicate { $_[0]->{predicate} }
+sub clearer { $_[0]->{clearer} }
+sub handles { $_[0]->{handles} }
+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 has_default { exists $_[0]->{default} }
+sub has_predicate { exists $_[0]->{predicate} }
+sub has_clearer { exists $_[0]->{clearer} }
+sub has_handles { exists $_[0]->{handles} }
+sub has_type_constraint { exists $_[0]->{type_constraint} }
+sub has_trigger { exists $_[0]->{trigger} }
+sub has_builder { exists $_[0]->{builder} }
sub _create_args {
$_[0]->{_create_args} = $_[1] if @_ > 1;
$_[0]->{_create_args}
}
-sub generate_accessor {
- my $attribute = shift;
-
- my $name = $attribute->name;
- my $key = $name;
- my $default = $attribute->default;
- my $type = $attribute->type_constraint;
- my $constraint = $attribute->find_type_constraint;
- my $builder = $attribute->builder;
-
- my $trigger = $attribute->trigger;
- my $before = $trigger->{before};
- my $after = $trigger->{after};
- my $around = $trigger->{around};
+sub inlined_name {
+ my $self = shift;
+ my $name = $self->name;
+ my $key = "'" . $name . "'";
+ return $key;
+}
- my $accessor = 'sub {
- my $self = shift;';
+sub generate_accessor_method_inline {
+ my ($attribute) = @_;
- if ($attribute->_is_metadata eq 'rw') {
- $accessor .= 'if (@_) {
- local $_ = $_[0];';
+ 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 = $attribute->should_coerce;
- if ($before) {
- $accessor .= '$before->($self, $_, $attribute);';
- }
+ my $compiled_type_constraint = $constraint ? $constraint->{_compiled_type_constraint} : undef;
- if ($around) {
- $accessor .= '$around->(sub {
- my $self = shift;
- $_ = $_[0];
- ';
- }
+ my $self = '$_[0]';
+ my $key = $attribute->inlined_name;
- if ($constraint) {
- $accessor .= 'unless ($constraint->()) {
- my $display = defined($_) ? overload::StrVal($_) : "undef";
- Carp::confess("Attribute ($name) does not pass the type constraint because: Validation failed for \'$type\' failed with value $display");
- }'
+ 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";
}
+ }
- $accessor .= '$self->{$key} = $_;';
+ # if there's nothing left to do for the attribute we can return during
+ # this setter
+ $accessor .= 'return ' if !$is_weak && !$trigger && !$should_deref;
- if ($attribute->is_weak_ref) {
- $accessor .= 'Scalar::Util::weaken($self->{$key}) if ref($self->{$key});';
- }
+ $accessor .= $self.'->{'.$key.'} = '.$value.';' . "\n";
- if ($around) {
- $accessor .= '}, $self, $_, $attribute);';
+ if ($is_weak) {
+ $accessor .= 'Scalar::Util::weaken('.$self.'->{'.$key.'}) if ref('.$self.'->{'.$key.'});' . "\n";
}
- if ($after) {
- $accessor .= '$after->($self, $_, $attribute);';
+ if ($trigger) {
+ $accessor .= '$trigger->('.$self.', '.$value.');' . "\n";
}
- $accessor .= '}';
+ $accessor .= "}\n";
}
else {
- $accessor .= 'confess "Cannot assign a value to a read-only accessor" if @_;';
+ $accessor .= 'Carp::confess("Cannot assign a value to a read-only accessor") if scalar(@_) >= 2;' . "\n";
}
if ($attribute->is_lazy) {
- $accessor .= '$self->{$key} = ';
+ $accessor .= $self.'->{'.$key.'} = ';
$accessor .= $attribute->has_builder
- ? '$self->$builder'
- : ref($default) eq 'CODE'
- ? '$default->($self)'
- : '$default';
-
- $accessor .= ' if !exists($self->{$key});';
+ ? $self.'->$builder'
+ : ref($default) eq 'CODE'
+ ? '$default->('.$self.')'
+ : '$default';
+ $accessor .= ' if !exists '.$self.'->{'.$key.'};' . "\n";
}
- if ($attribute->should_auto_deref) {
- if ($attribute->type_constraint eq 'ArrayRef') {
+ if ($should_deref) {
+ if (ref($constraint) && $constraint->name =~ '^ArrayRef\b') {
$accessor .= 'if (wantarray) {
- return @{ $self->{$key} || [] };
+ return @{ '.$self.'->{'.$key.'} || [] };
}';
}
else {
$accessor .= 'if (wantarray) {
- return %{ $self->{$key} || {} };
+ return %{ '.$self.'->{'.$key.'} || {} };
}';
}
}
- $accessor .= 'return $self->{$key};
+ $accessor .= 'return '.$self.'->{'.$key.'};
}';
- return eval $accessor;
+ my $sub = eval $accessor;
+ Carp::confess($@) if $@;
+ return $sub;
}
+
sub generate_predicate {
my $attribute = shift;
- my $key = $attribute->name;
+ my $key = $attribute->inlined_name;
- my $predicate = 'sub { exists($_[0]->{$key}) }';
+ my $predicate = 'sub { exists($_[0]->{'.$key.'}) }';
- return eval $predicate;
+ my $sub = eval $predicate;
+ confess $@ if $@;
+ return $sub;
}
sub generate_clearer {
my $attribute = shift;
- my $key = $attribute->name;
+ my $key = $attribute->inlined_name;
- my $predicate = 'sub { delete($_[0]->{$key}) }';
+ my $clearer = 'sub { delete($_[0]->{'.$key.'}) }';
- return eval $predicate;
+ my $sub = eval $clearer;
+ confess $@ if $@;
+ return $sub;
}
sub generate_handles {
my $method = 'sub {
my $self = shift;
- $self->$reader->$remote_method(@_)
+ $self->'.$reader.'->'.$remote_method.'(@_)
}';
$method_map{$local_method} = eval $method;
+ confess $@ if $@;
}
return \%method_map;
%args = $self->canonicalize_args($name, %args);
$self->validate_args($name, \%args);
- $args{type_constraint} = delete $args{isa}
- if exists $args{isa};
+ $args{should_coerce} = delete $args{coerce}
+ 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);
+ }
- my $attribute = $self->new(%args);
+ my $attribute = $self->new($name, %args);
$attribute->_create_args(\%args);
# install an accessor
if ($attribute->_is_metadata eq 'rw' || $attribute->_is_metadata eq 'ro') {
- my $accessor = $attribute->generate_accessor;
- $class->add_method($name => $accessor);
+ my $code = $attribute->generate_accessor_method_inline();
+ $class->add_method($name => $code);
}
for my $method (qw/predicate clearer/) {
confess "You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute ($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 'CODE') {
- $args->{trigger} = {
- after => $args->{trigger},
- };
- }
- elsif (ref($args->{trigger}) eq 'HASH') {
- Carp::carp "HASH-based form of trigger is deprecated. Please switch back to using the coderef form of trigger.";
+ if (ref($args->{trigger}) eq 'HASH') {
+ Carp::carp "HASH-based form of trigger has been removed. Only the coderef form of triggers are now supported.";
}
confess "Trigger must be a CODE ref on attribute ($name)"
- if ref($args->{trigger}) ne 'HASH';
+ if ref($args->{trigger}) ne 'CODE';
}
return 1;
}
-sub find_type_constraint {
- my $self = shift;
- my $type = $self->type_constraint;
-
- return unless $type;
+sub verify_against_type_constraint {
+ my ($self, $value) = @_;
+ my $tc = $self->type_constraint;
+ return 1 unless $tc;
- my $checker = Mouse::TypeRegistry->optimized_constraints->{$type};
- return $checker if $checker;
+ local $_ = $value;
+ return 1 if $tc->check($value);
- return sub { blessed($_) && blessed($_) eq $type };
+ $self->verify_type_constraint_error($self->name, $value, $tc);
}
-sub verify_type_constraint {
- my $self = shift;
- local $_ = shift;
-
- my $type = $self->type_constraint
- or return 1;
- my $constraint = $self->find_type_constraint;
-
- return 1 if $constraint->($_);
+sub verify_type_constraint_error {
+ my($self, $name, $value, $type) = @_;
+ Carp::confess("Attribute ($name) does not pass the type constraint because: " . $type->get_message($value));
+}
- my $name = $self->name;
- my $display = defined($_) ? overload::StrVal($_) : 'undef';
- Carp::confess("Attribute ($name) does not pass the type constraint because: Validation failed for \'$type\' failed with value $display");
+sub coerce_constraint { ## my($self, $value) = @_;
+ my $type = $_[0]->{type_constraint}
+ or return $_[1];
+ return Mouse::Util::TypeConstraints->typecast_constraints($_[0]->associated_class->name, $_[0]->type_constraint, $_[1]);
}
sub _canonicalize_handles {
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_type_constraint Item -> 1 | ERROR
+=head2 verify_against_type_constraint Item -> 1 | ERROR
Checks that the given value passes this attribute's type constraint. Returns 1
on success, otherwise C<confess>es.
projects / gitmo/Mouse.git / blobdiff