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- package Mouse::PurePerl;
-
- require Mouse::Util;
-
- package Mouse::Util;
-
- use strict;
- use warnings;
-
- use warnings FATAL => 'redefine'; # to avoid to load Mouse::PurePerl
-
- use B ();
-
-
- # 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::"}{"Bar::"}} == \*main::Foo::Bar::
-
- my $pack = \%::;
- foreach my $part (split('::', $class)) {
- $part .= '::';
- return 0 if !exists $pack->{$part};
-
- my $entry = \$pack->{$part};
- return 0 if ref($entry) ne 'GLOB';
- $pack = *{$entry}{HASH};
- }
-
- return 0 if !%{$pack};
-
- # check for $VERSION or @ISA
- return 1 if exists $pack->{VERSION}
- && defined *{$pack->{VERSION}}{SCALAR} && defined ${ $pack->{VERSION} };
- return 1 if exists $pack->{ISA}
- && defined *{$pack->{ISA}}{ARRAY} && @{ $pack->{ISA} } != 0;
-
- # check for any method
- foreach my $name( keys %{$pack} ) {
- my $entry = \$pack->{$name};
- return 1 if ref($entry) ne 'GLOB' || defined *{$entry}{CODE};
- }
-
- # fail
- return 0;
- }
-
-
- # taken from Sub::Identify
- sub get_code_info {
- my ($coderef) = @_;
- ref($coderef) or return;
-
- my $cv = B::svref_2object($coderef);
- $cv->isa('B::CV') or return;
-
- my $gv = $cv->GV;
- $gv->isa('B::GV') or return;
-
- return ($gv->STASH->NAME, $gv->NAME);
- }
-
- sub get_code_package{
- my($coderef) = @_;
-
- my $cv = B::svref_2object($coderef);
- $cv->isa('B::CV') or return '';
-
- my $gv = $cv->GV;
- $gv->isa('B::GV') or return '';
-
- return $gv->STASH->NAME;
- }
-
- sub get_code_ref{
- my($package, $name) = @_;
- no strict 'refs';
- no warnings 'once';
- use warnings FATAL => 'uninitialized';
- return *{$package . '::' . $name}{CODE};
- }
-
- sub generate_isa_predicate_for {
- my($for_class, $name) = @_;
-
- my $predicate = sub{ Scalar::Util::blessed($_[0]) && $_[0]->isa($for_class) };
-
- if(defined $name){
- 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;
- }
-
- return $predicate;
- }
-
- package Mouse::Util::TypeConstraints;
-
- use Scalar::Util qw(blessed looks_like_number openhandle);
-
- sub Any { 1 }
- sub Item { 1 }
-
- sub Bool { $_[0] ? $_[0] eq '1' : 1 }
- sub Undef { !defined($_[0]) }
- sub Defined { defined($_[0]) }
- sub Value { defined($_[0]) && !ref($_[0]) }
- sub Num { looks_like_number($_[0]) }
- sub Int {
- my($value) = @_;
- looks_like_number($value) && $value =~ /\A [+-]? [0-9]+ \z/xms;
- }
- sub Str {
- my($value) = @_;
- return defined($value) && ref(\$value) eq 'SCALAR';
- }
-
- sub Ref { ref($_[0]) }
- sub ScalarRef {
- my($value) = @_;
- return ref($value) eq 'SCALAR'
- }
- sub ArrayRef { ref($_[0]) eq 'ARRAY' }
- sub HashRef { ref($_[0]) eq 'HASH' }
- sub CodeRef { ref($_[0]) eq 'CODE' }
- sub RegexpRef { ref($_[0]) eq 'Regexp' }
- sub GlobRef { ref($_[0]) eq 'GLOB' }
-
- sub FileHandle {
- return openhandle($_[0]) || (blessed($_[0]) && $_[0]->isa("IO::Handle"))
- }
-
- sub Object { blessed($_[0]) && blessed($_[0]) ne 'Regexp' }
-
- sub ClassName { Mouse::Util::is_class_loaded($_[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;
-
- sub name { $_[0]->{package} }
-
- sub _method_map { $_[0]->{methods} }
- sub _attribute_map{ $_[0]->{attributes} }
-
- sub namespace{
- my $name = $_[0]->{package};
- no strict 'refs';
- return \%{ $name . '::' };
- }
-
- sub add_method {
- my($self, $name, $code) = @_;
-
- if(!defined $name){
- $self->throw_error('You must pass a defined name');
- }
- if(!defined $code){
- $self->throw_error('You must pass a defined code');
- }
-
- if(ref($code) ne 'CODE'){
- $code = \&{$code}; # coerce
- }
-
- $self->{methods}->{$name} = $code; # Moose stores meta object here.
-
- Mouse::Util::install_subroutines($self->name,
- $name => $code,
- );
- return;
- }
-
- 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' }
-
- 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 get_all_attributes {
- my($self) = @_;
- my %attrs = map { %{ $self->initialize($_)->{attributes} } } reverse $self->linearized_isa;
- return values %attrs;
- }
-
- sub new_object {
- my $meta = shift;
- my %args = (@_ == 1 ? %{$_[0]} : @_);
-
- my $object = bless {}, $meta->name;
-
- $meta->_initialize_object($object, \%args);
- # 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 = $object->Mouse::Object::BUILDARGS(@_);
-
- (blessed($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) = @_;
-
- my @triggers_queue;
-
- my $used = 0;
-
- foreach my $attribute ($self->get_all_attributes) {
- my $init_arg = $attribute->init_arg;
- my $slot = $attribute->name;
-
- if (defined($init_arg) && exists($args->{$init_arg})) {
- $object->{$slot} = $attribute->_coerce_and_verify($args->{$init_arg}, $object);
-
- weaken($object->{$slot})
- if ref($object->{$slot}) && $attribute->is_weak_ref;
-
- if ($attribute->has_trigger) {
- push @triggers_queue, [ $attribute->trigger, $object->{$slot} ];
- }
- $used++;
- }
- else { # no init arg
- if ($attribute->has_default || $attribute->has_builder) {
- if (!$attribute->is_lazy && !exists $object->{$slot}) {
- my $default = $attribute->default;
- my $builder = $attribute->builder;
- my $value = $builder ? $object->$builder()
- : ref($default) eq 'CODE' ? $object->$default()
- : $default;
-
- $object->{$slot} = $attribute->_coerce_and_verify($value, $object);
-
- weaken($object->{$slot})
- if ref($object->{$slot}) && $attribute->is_weak_ref;
- }
- }
- elsif(!$is_cloning && $attribute->is_required) {
- $self->throw_error("Attribute (".$attribute->name.") is required");
- }
- }
- }
-
- if($used < keys %{$args} && $self->strict_constructor) {
- $self->_report_unknown_args([ $self->get_all_attributes ], $args);
- }
-
- if(@triggers_queue){
- foreach my $trigger_and_value(@triggers_queue){
- my($trigger, $value) = @{$trigger_and_value};
- $trigger->($object, $value);
- }
- }
-
- if($self->is_anon_class){
- $object->{__METACLASS__} = $self;
- }
-
- return;
- }
-
- sub is_immutable { $_[0]->{is_immutable} }
-
- sub strict_constructor{
- my $self = shift;
- if(@_) {
- $self->{strict_constructor} = shift;
- }
-
- foreach my $class($self->linearized_isa) {
- my $meta = Mouse::Util::get_metaclass_by_name($class)
- or next;
-
- if(exists $meta->{strict_constructor}) {
- return $meta->{strict_constructor};
- }
- }
-
- return 0; # false
- }
-
- sub _report_unknown_args {
- my($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 { $_[0]->{roles} }
-
- sub add_before_method_modifier {
- my ($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} ||= [] }
- }
-
- package Mouse::Meta::Attribute;
-
- require Mouse::Meta::Method::Accessor;
-
- sub accessor_metaclass{ $_[0]->{accessor_metaclass} || 'Mouse::Meta::Method::Accessor' }
-
- # readers
-
- sub name { $_[0]->{name} }
- sub associated_class { $_[0]->{associated_class} }
-
- sub accessor { $_[0]->{accessor} }
- sub reader { $_[0]->{reader} }
- sub writer { $_[0]->{writer} }
- sub predicate { $_[0]->{predicate} }
- sub clearer { $_[0]->{clearer} }
- sub handles { $_[0]->{handles} }
-
- 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 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 should_coerce { $_[0]->{coerce} }
-
- sub documentation { $_[0]->{documentation} }
- sub insertion_order { $_[0]->{insertion_order} }
-
- # predicates
-
- sub has_accessor { exists $_[0]->{accessor} }
- sub has_reader { exists $_[0]->{reader} }
- sub has_writer { exists $_[0]->{writer} }
- sub has_predicate { exists $_[0]->{predicate} }
- sub has_clearer { exists $_[0]->{clearer} }
- sub has_handles { exists $_[0]->{handles} }
-
- sub has_default { exists $_[0]->{default} }
- sub has_type_constraint { exists $_[0]->{type_constraint} }
- sub has_trigger { exists $_[0]->{trigger} }
- sub has_builder { exists $_[0]->{builder} }
-
- sub has_documentation { exists $_[0]->{documentation} }
-
- sub _process_options{
- my($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($args) };
- };
- if(!$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});
- }
- }
-
- 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})
- || $class->throw_error("You cannot have lazy attribute ($name) without specifying a default value for it");
- }
-
- return;
- }
-
-
- package Mouse::Meta::TypeConstraint;
-
- sub name { $_[0]->{name} }
- sub parent { $_[0]->{parent} }
- sub message { $_[0]->{message} }
-
- 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;
-
- $class->meta->throw_error('Cannot call new() on an instance') if ref $class;
-
- my $args = $class->BUILDARGS(@_);
-
- my $meta = Mouse::Meta::Class->initialize($class);
- return $meta->new_object($args);
- }
-
- sub DESTROY {
- my $self = shift;
-
- return unless $self->can('DEMOLISH'); # short circuit
-
- local $?;
-
- my $e = do{
- 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 DEMOLISHALL;
- *DEMOLISHALL = \&DESTROY;
-
- 1;
- __END__
-
- =head1 NAME
-
- Mouse::PurePerl - A Mouse guts in pure Perl
-
- =head1 VERSION
-
- This document describes Mouse version 0.64
-
- =head1 SEE ALSO
-
- L<Mouse::XS>
-
- =cut
-