package Mouse::PurePerl;
-
-package
- Mouse::Util;
-
+# The pure Perl backend for Mouse
+package Mouse::Util;
use strict;
use warnings;
+use warnings FATAL => 'redefine'; # to avoid to load Mouse::PurePerl twice
-use warnings FATAL => 'redefine'; # to avoid to load Mouse::PurePerl
-
+use Scalar::Util ();
use B ();
+require Mouse::Util;
+
+# taken from Class/MOP.pm
+sub is_valid_class_name {
+ my $class = shift;
+
+ return 0 if ref($class);
+ return 0 unless defined($class);
+
+ return 1 if $class =~ /\A \w+ (?: :: \w+ )* \z/xms;
+
+ return 0;
+}
+
sub is_class_loaded {
my $class = shift;
return 0 if ref($class) || !defined($class) || !length($class);
# walk the symbol table tree to avoid autovififying
- # \*{${main::}{"Foo::"}} == \*main::Foo::
+ # \*{${main::}{"Foo::"}{"Bar::"}} == \*main::Foo::Bar::
my $pack = \%::;
foreach my $part (split('::', $class)) {
- my $entry = \$pack->{$part . '::'};
+ $part .= '::';
+ return 0 if !exists $pack->{$part};
+
+ my $entry = \$pack->{$part};
return 0 if ref($entry) ne 'GLOB';
- $pack = *{$entry}{HASH} or return 0;
+ $pack = *{$entry}{HASH};
}
+ return 0 if !%{$pack};
+
# check for $VERSION or @ISA
return 1 if exists $pack->{VERSION}
&& defined *{$pack->{VERSION}}{SCALAR} && defined ${ $pack->{VERSION} };
my $predicate = sub{ Scalar::Util::blessed($_[0]) && $_[0]->isa($for_class) };
if(defined $name){
- no strict 'refs';
- *{ caller() . '::' . $name } = $predicate;
+ Mouse::Util::install_subroutines(scalar caller, $name => $predicate);
return;
}
return $predicate;
}
+sub generate_can_predicate_for {
+ my($methods_ref, $name) = @_;
+
+ my @methods = @{$methods_ref};
+
+ my $predicate = sub{
+ my($instance) = @_;
+ if(Scalar::Util::blessed($instance)){
+ foreach my $method(@methods){
+ if(!$instance->can($method)){
+ return 0;
+ }
+ }
+ return 1;
+ }
+ return 0;
+ };
+
+ if(defined $name){
+ Mouse::Util::install_subroutines(scalar caller, $name => $predicate);
+ return;
+ }
-package
- Mouse::Util::TypeConstraints;
+ return $predicate;
+}
+
+package Mouse::Util::TypeConstraints;
-use Scalar::Util qw(blessed looks_like_number openhandle);
sub Any { 1 }
sub Item { 1 }
-sub Bool { $_[0] ? $_[0] eq '1' : 1 }
+sub Bool { !$_[0] || $_[0] eq '1' }
sub Undef { !defined($_[0]) }
sub Defined { defined($_[0]) }
sub Value { defined($_[0]) && !ref($_[0]) }
-sub Num { !ref($_[0]) && looks_like_number($_[0]) }
-sub Int { defined($_[0]) && !ref($_[0]) && $_[0] =~ /^-?[0-9]+$/ }
-sub Str { defined($_[0]) && !ref($_[0]) }
+sub Num { Scalar::Util::looks_like_number($_[0]) }
+sub Str {
+ # We need to use a copy here to flatten MAGICs, for instance as in
+ # Str( substr($_, 0, 42) ).
+ my($value) = @_;
+ return defined($value) && ref(\$value) eq 'SCALAR';
+}
+sub Int {
+ # We need to use a copy here to save the original internal SV flags.
+ my($value) = @_;
+ return defined($value) && $value =~ /\A -? [0-9]+ \z/xms;
+}
sub Ref { ref($_[0]) }
-sub ScalarRef { ref($_[0]) eq 'SCALAR' }
+sub ScalarRef {
+ my($value) = @_;
+ return ref($value) eq 'SCALAR' || ref($value) eq 'REF';
+}
sub ArrayRef { ref($_[0]) eq 'ARRAY' }
sub HashRef { ref($_[0]) eq 'HASH' }
sub CodeRef { ref($_[0]) eq 'CODE' }
sub GlobRef { ref($_[0]) eq 'GLOB' }
sub FileHandle {
- openhandle($_[0]) || (blessed($_[0]) && $_[0]->isa("IO::Handle"))
+ my($value) = @_;
+ return Scalar::Util::openhandle($value)
+ || (Scalar::Util::blessed($value) && $value->isa("IO::Handle"))
}
-sub Object { blessed($_[0]) && blessed($_[0]) ne 'Regexp' }
+sub Object { Scalar::Util::blessed($_[0]) && ref($_[0]) ne 'Regexp' }
sub ClassName { Mouse::Util::is_class_loaded($_[0]) }
sub RoleName { (Mouse::Util::class_of($_[0]) || return 0)->isa('Mouse::Meta::Role') }
+sub _parameterize_ArrayRef_for {
+ my($type_parameter) = @_;
+ my $check = $type_parameter->_compiled_type_constraint;
+
+ return sub {
+ foreach my $value (@{$_}) {
+ return undef unless $check->($value);
+ }
+ return 1;
+ }
+}
+
+sub _parameterize_HashRef_for {
+ my($type_parameter) = @_;
+ my $check = $type_parameter->_compiled_type_constraint;
+
+ return sub {
+ foreach my $value(values %{$_}){
+ return undef unless $check->($value);
+ }
+ return 1;
+ };
+}
+
+# 'Maybe' type accepts 'Any', so it requires parameters
+sub _parameterize_Maybe_for {
+ my($type_parameter) = @_;
+ my $check = $type_parameter->_compiled_type_constraint;
+
+ return sub{
+ return !defined($_) || $check->($_);
+ };
+}
-package
- Mouse::Meta::Module;
+package Mouse::Meta::Module;
sub name { $_[0]->{package} }
sub _method_map { $_[0]->{methods} }
-sub _attribute_map{ $_[0]->{attribute_map} }
+sub _attribute_map{ $_[0]->{attributes} }
sub namespace{
my $name = $_[0]->{package};
$self->{methods}->{$name} = $code; # Moose stores meta object here.
- my $pkg = $self->name;
- no strict 'refs';
- no warnings 'redefine', 'once';
- *{ $pkg . '::' . $name } = $code;
+ Mouse::Util::install_subroutines($self->name,
+ $name => $code,
+ );
return;
}
+my $generate_class_accessor = sub {
+ my($name) = @_;
+ return sub {
+ my $self = shift;
+ if(@_) {
+ return $self->{$name} = shift;
+ }
+
+ foreach my $class($self->linearized_isa) {
+ my $meta = Mouse::Util::get_metaclass_by_name($class)
+ or next;
+
+ if(exists $meta->{$name}) {
+ return $meta->{$name};
+ }
+ }
+ return undef;
+ };
+};
+
+
+package Mouse::Meta::Class;
+
+use Mouse::Meta::Method::Constructor;
+use Mouse::Meta::Method::Destructor;
+
+sub method_metaclass { $_[0]->{method_metaclass} || 'Mouse::Meta::Method' }
+sub attribute_metaclass { $_[0]->{attribute_metaclass} || 'Mouse::Meta::Attribute' }
-package
- Mouse::Meta::Class;
+sub constructor_class { $_[0]->{constructor_class} || 'Mouse::Meta::Method::Constructor' }
+sub destructor_class { $_[0]->{destructor_class} || 'Mouse::Meta::Method::Destructor' }
sub is_anon_class{
return exists $_[0]->{anon_serial_id};
sub roles { $_[0]->{roles} }
-sub linearized_isa { @{ get_linear_isa($_[0]->{package}) } }
+sub linearized_isa { @{ Mouse::Util::get_linear_isa($_[0]->{package}) } }
-package
- Mouse::Meta::Role;
+sub new_object {
+ my $meta = shift;
+ my %args = (@_ == 1 ? %{$_[0]} : @_);
+
+ my $object = bless {}, $meta->name;
+
+ $meta->_initialize_object($object, \%args, 0);
+ # BUILDALL
+ if( $object->can('BUILD') ) {
+ for my $class (reverse $meta->linearized_isa) {
+ my $build = Mouse::Util::get_code_ref($class, 'BUILD')
+ || next;
+
+ $object->$build(\%args);
+ }
+ }
+ return $object;
+}
+
+sub clone_object {
+ my $class = shift;
+ my $object = shift;
+ my $args = $object->Mouse::Object::BUILDARGS(@_);
+
+ (Scalar::Util::blessed($object) && $object->isa($class->name))
+ || $class->throw_error("You must pass an instance of the metaclass (" . $class->name . "), not ($object)");
+
+ my $cloned = bless { %$object }, ref $object;
+ $class->_initialize_object($cloned, $args, 1);
+ return $cloned;
+}
+
+sub _initialize_object{
+ my($self, $object, $args, $is_cloning) = @_;
+ # The initializer, which is used everywhere, must be clear
+ # when an attribute is added. See Mouse::Meta::Class::add_attribute.
+ my $initializer = $self->{_mouse_cache}{_initialize_object} ||=
+ Mouse::Util::load_class($self->constructor_class)
+ ->_generate_initialize_object($self);
+ goto &{$initializer};
+}
+
+sub get_all_attributes {
+ my($self) = @_;
+ return @{ $self->{_mouse_cache}{all_attributes}
+ ||= $self->_calculate_all_attributes };
+}
+
+sub is_immutable { $_[0]->{is_immutable} }
+
+sub strict_constructor;
+*strict_constructor = $generate_class_accessor->('strict_constructor');
+
+sub _invalidate_metaclass_cache {
+ my($self) = @_;
+ delete $self->{_mouse_cache};
+ return;
+}
+
+sub _report_unknown_args {
+ my($metaclass, $attrs, $args) = @_;
+
+ my @unknowns;
+ my %init_args;
+ foreach my $attr(@{$attrs}){
+ my $init_arg = $attr->init_arg;
+ if(defined $init_arg){
+ $init_args{$init_arg}++;
+ }
+ }
+
+ while(my $key = each %{$args}){
+ if(!exists $init_args{$key}){
+ push @unknowns, $key;
+ }
+ }
+
+ $metaclass->throw_error( sprintf
+ "Unknown attribute passed to the constructor of %s: %s",
+ $metaclass->name, Mouse::Util::english_list(@unknowns),
+ );
+}
+
+package Mouse::Meta::Role;
+
+sub method_metaclass{ $_[0]->{method_metaclass} || 'Mouse::Meta::Role::Method' }
sub is_anon_role{
return exists $_[0]->{anon_serial_id};
sub get_roles { $_[0]->{roles} }
-package
- Mouse::Meta::Attribute;
+sub add_before_method_modifier {
+ my ($self, $method_name, $method) = @_;
+
+ push @{ $self->{before_method_modifiers}{$method_name} ||= [] }, $method;
+ return;
+}
+sub add_around_method_modifier {
+ my ($self, $method_name, $method) = @_;
+
+ push @{ $self->{around_method_modifiers}{$method_name} ||= [] }, $method;
+ return;
+}
+sub add_after_method_modifier {
+ my ($self, $method_name, $method) = @_;
+
+ push @{ $self->{after_method_modifiers}{$method_name} ||= [] }, $method;
+ return;
+}
+
+sub get_before_method_modifiers {
+ my ($self, $method_name) = @_;
+ return @{ $self->{before_method_modifiers}{$method_name} ||= [] }
+}
+sub get_around_method_modifiers {
+ my ($self, $method_name) = @_;
+ return @{ $self->{around_method_modifiers}{$method_name} ||= [] }
+}
+sub get_after_method_modifiers {
+ my ($self, $method_name) = @_;
+ return @{ $self->{after_method_modifiers}{$method_name} ||= [] }
+}
+
+sub add_metaclass_accessor { # for meta roles (a.k.a. traits)
+ my($meta, $name) = @_;
+ $meta->add_method($name => $generate_class_accessor->($name));
+ return;
+}
+
+package Mouse::Meta::Attribute;
-use Mouse::Meta::Method::Accessor;
+require Mouse::Meta::Method::Accessor;
+
+sub accessor_metaclass{ $_[0]->{accessor_metaclass} || 'Mouse::Meta::Method::Accessor' }
# readers
sub should_coerce { $_[0]->{coerce} }
sub documentation { $_[0]->{documentation} }
+sub insertion_order { $_[0]->{insertion_order} }
# predicates
sub has_documentation { exists $_[0]->{documentation} }
-sub accessor_metaclass(){ 'Mouse::Meta::Method::Accessor' }
+sub _process_options{
+ my($class, $name, $args) = @_;
+
+ # taken from Class::MOP::Attribute::new
+
+ defined($name)
+ or $class->throw_error('You must provide a name for the attribute');
+
+ if(!exists $args->{init_arg}){
+ $args->{init_arg} = $name;
+ }
+
+ # 'required' requires eigher 'init_arg', 'builder', or 'default'
+ my $can_be_required = defined( $args->{init_arg} );
+
+ if(exists $args->{builder}){
+ # XXX:
+ # Moose refuses a CODE ref builder, but Mouse doesn't for backward compatibility
+ # This feature will be changed in a future. (gfx)
+ $class->throw_error('builder must be a defined scalar value which is a method name')
+ #if ref $args->{builder} || !defined $args->{builder};
+ if !defined $args->{builder};
+
+ $can_be_required++;
+ }
+ elsif(exists $args->{default}){
+ if(ref $args->{default} && ref($args->{default}) ne 'CODE'){
+ $class->throw_error("References are not allowed as default values, you must "
+ . "wrap the default of '$name' in a CODE reference (ex: sub { [] } and not [])");
+ }
+ $can_be_required++;
+ }
+
+ if( $args->{required} && !$can_be_required ) {
+ $class->throw_error("You cannot have a required attribute ($name) without a default, builder, or an init_arg");
+ }
+
+ # taken from Mouse::Meta::Attribute->new and ->_process_args
+
+ if(exists $args->{is}){
+ my $is = $args->{is};
+
+ if($is eq 'ro'){
+ $args->{reader} ||= $name;
+ }
+ elsif($is eq 'rw'){
+ if(exists $args->{writer}){
+ $args->{reader} ||= $name;
+ }
+ else{
+ $args->{accessor} ||= $name;
+ }
+ }
+ elsif($is eq 'bare'){
+ # do nothing, but don't complain (later) about missing methods
+ }
+ else{
+ $is = 'undef' if !defined $is;
+ $class->throw_error("I do not understand this option (is => $is) on attribute ($name)");
+ }
+ }
+
+ my $tc;
+ if(exists $args->{isa}){
+ $tc = $args->{type_constraint} = Mouse::Util::TypeConstraints::find_or_create_isa_type_constraint($args->{isa});
+ }
+
+ if(exists $args->{does}){
+ if(defined $tc){ # both isa and does supplied
+ my $does_ok = do{
+ local $@;
+ eval{ "$tc"->does($args->{does}) };
+ };
+ if(!$does_ok){
+ $class->throw_error("Cannot have both an isa option and a does option because '$tc' does not do '$args->{does}' on attribute ($name)");
+ }
+ }
+ else {
+ $tc = $args->{type_constraint} = Mouse::Util::TypeConstraints::find_or_create_does_type_constraint($args->{does});
+ }
+ }
-package
- Mouse::Meta::TypeConstraint;
+ if($args->{coerce}){
+ defined($tc)
+ || $class->throw_error("You cannot have coercion without specifying a type constraint on attribute ($name)");
+
+ $args->{weak_ref}
+ && $class->throw_error("You cannot have a weak reference to a coerced value on attribute ($name)");
+ }
+
+ if ($args->{lazy_build}) {
+ exists($args->{default})
+ && $class->throw_error("You can not use lazy_build and default for the same attribute ($name)");
+
+ $args->{lazy} = 1;
+ $args->{builder} ||= "_build_${name}";
+ if ($name =~ /^_/) {
+ $args->{clearer} ||= "_clear${name}";
+ $args->{predicate} ||= "_has${name}";
+ }
+ else {
+ $args->{clearer} ||= "clear_${name}";
+ $args->{predicate} ||= "has_${name}";
+ }
+ }
+
+ if ($args->{auto_deref}) {
+ defined($tc)
+ || $class->throw_error("You cannot auto-dereference without specifying a type constraint on attribute ($name)");
+
+ ( $tc->is_a_type_of('ArrayRef') || $tc->is_a_type_of('HashRef') )
+ || $class->throw_error("You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute ($name)");
+ }
+
+ if (exists $args->{trigger}) {
+ ('CODE' eq ref $args->{trigger})
+ || $class->throw_error("Trigger must be a CODE ref on attribute ($name)");
+ }
+
+ if ($args->{lazy}) {
+ (exists $args->{default} || defined $args->{builder})
+ || $class->throw_error("You cannot have a lazy attribute ($name) without specifying a default value for it");
+ }
+
+ return;
+}
+
+
+package Mouse::Meta::TypeConstraint;
+
+use overload
+ '""' => '_as_string',
+ '0+' => '_identity',
+ '|' => '_unite',
+
+ fallback => 1;
sub name { $_[0]->{name} }
sub parent { $_[0]->{parent} }
sub message { $_[0]->{message} }
+sub _identity { Scalar::Util::refaddr($_[0]) } # overload 0+
+
+sub type_parameter { $_[0]->{type_parameter} }
sub _compiled_type_constraint{ $_[0]->{compiled_type_constraint} }
-sub _compiled_type_coercion { $_[0]->{_compiled_type_coercion} }
+sub __is_parameterized { exists $_[0]->{type_parameter} }
+sub has_coercion { exists $_[0]->{_compiled_type_coercion} }
+
+
+sub compile_type_constraint{
+ my($self) = @_;
+
+ # add parents first
+ my @checks;
+ for(my $parent = $self->{parent}; defined $parent; $parent = $parent->{parent}){
+ if($parent->{hand_optimized_type_constraint}){
+ unshift @checks, $parent->{hand_optimized_type_constraint};
+ last; # a hand optimized constraint must include all the parents
+ }
+ elsif($parent->{constraint}){
+ unshift @checks, $parent->{constraint};
+ }
+ }
+
+ # then add child
+ if($self->{constraint}){
+ push @checks, $self->{constraint};
+ }
+
+ if($self->{type_constraints}){ # Union
+ my @types = map{ $_->{compiled_type_constraint} } @{ $self->{type_constraints} };
+ push @checks, sub{
+ foreach my $c(@types){
+ return 1 if $c->($_[0]);
+ }
+ return 0;
+ };
+ }
+
+ if(@checks == 0){
+ $self->{compiled_type_constraint} = \&Mouse::Util::TypeConstraints::Any;
+ }
+ else{
+ $self->{compiled_type_constraint} = sub{
+ my(@args) = @_;
+ local $_ = $args[0];
+ foreach my $c(@checks){
+ return undef if !$c->(@args);
+ }
+ return 1;
+ };
+ }
+ return;
+}
+
+sub check {
+ my $self = shift;
+ return $self->_compiled_type_constraint->(@_);
+}
+
+
+package Mouse::Object;
+
+sub BUILDARGS {
+ my $class = shift;
+
+ if (scalar @_ == 1) {
+ (ref($_[0]) eq 'HASH')
+ || $class->meta->throw_error("Single parameters to new() must be a HASH ref");
+
+ return {%{$_[0]}};
+ }
+ else {
+ return {@_};
+ }
+}
+
+sub new {
+ my $class = shift;
+ my $args = $class->BUILDARGS(@_);
+ return $class->meta->new_object($args);
+}
+
+sub DESTROY {
+ my $self = shift;
+
+ return unless $self->can('DEMOLISH'); # short circuit
+
+ my $e = do{
+ local $?;
+ local $@;
+ eval{
+ # DEMOLISHALL
+
+ # We cannot count on being able to retrieve a previously made
+ # metaclass, _or_ being able to make a new one during global
+ # destruction. However, we should still be able to use mro at
+ # that time (at least tests suggest so ;)
+
+ foreach my $class (@{ Mouse::Util::get_linear_isa(ref $self) }) {
+ my $demolish = Mouse::Util::get_code_ref($class, 'DEMOLISH')
+ || next;
+
+ $self->$demolish($Mouse::Util::in_global_destruction);
+ }
+ };
+ $@;
+ };
+
+ no warnings 'misc';
+ die $e if $e; # rethrow
+}
+
+sub BUILDALL {
+ my $self = shift;
+
+ # short circuit
+ return unless $self->can('BUILD');
+
+ for my $class (reverse $self->meta->linearized_isa) {
+ my $build = Mouse::Util::get_code_ref($class, 'BUILD')
+ || next;
+
+ $self->$build(@_);
+ }
+ return;
+}
-sub has_coercion{ exists $_[0]->{_compiled_type_coercion} }
+sub DEMOLISHALL;
+*DEMOLISHALL = \&DESTROY;
1;
__END__
=head1 VERSION
-This document describes Mouse version 0.40_03
+This document describes Mouse version 0.93
=head1 SEE ALSO