-package
- Mouse::Util;
+package Mouse::PurePerl;
+
+require Mouse::Util;
+
+package Mouse::Util;
use strict;
use warnings;
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
- # \*{${main::}{"Foo::"}} == \*main::Foo::
+ # \*{${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 ${ $pack->{VERSION} };
return *{$package . '::' . $name}{CODE};
}
-package
- Mouse::Util::TypeConstraints;
+sub generate_isa_predicate_for {
+ my($for_class, $name) = @_;
-use Scalar::Util qw(blessed looks_like_number openhandle);
+ my $predicate = sub{ Scalar::Util::blessed($_[0]) && $_[0]->isa($for_class) };
-sub _generate_class_type_for{
- my($for_class, $name) = @_;
+ if(defined $name){
+ no strict 'refs';
+ *{ caller() . '::' . $name } = $predicate;
+ return;
+ }
- my $predicate = sub{ blessed($_[0]) && $_[0]->isa($for_class) };
+ 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){
no strict 'refs';
return $predicate;
}
+package Mouse::Util::TypeConstraints;
+
+use Scalar::Util qw(blessed looks_like_number openhandle);
sub Any { 1 }
sub Item { 1 }
sub Value { defined($_[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 Str {
+ my($value) = @_;
+ return defined($value) && ref(\$value) eq 'SCALAR';
+}
sub Ref { ref($_[0]) }
-sub ScalarRef { ref($_[0]) eq 'SCALAR' }
+sub ScalarRef {
+ my($value) = @_;
+ return ref($value) eq 'SCALAR'
+}
sub ArrayRef { ref($_[0]) eq 'ARRAY' }
sub HashRef { ref($_[0]) eq 'HASH' }
sub CodeRef { ref($_[0]) eq 'CODE' }
sub GlobRef { ref($_[0]) eq 'GLOB' }
sub FileHandle {
- openhandle($_[0]) || (blessed($_[0]) && $_[0]->isa("IO::Handle"))
+ return openhandle($_[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;
-package
- Mouse::Meta::Module;
+sub name { $_[0]->{package} }
-sub name { $_[0]->{package} }
+sub _method_map { $_[0]->{methods} }
+sub _attribute_map{ $_[0]->{attributes} }
sub namespace{
my $name = $_[0]->{package};
return \%{ $name . '::' };
}
-package
- Mouse::Meta::Class;
+sub add_method {
+ my($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.
+
+ my $pkg = $self->name;
+ no strict 'refs';
+ no warnings 'redefine', 'once';
+ *{ $pkg . '::' . $name } = $code;
+ return;
+}
+
+package Mouse::Meta::Class;
+
+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 $_[0]->{anon_serial_id};
sub linearized_isa { @{ get_linear_isa($_[0]->{package}) } }
-package
- Mouse::Meta::Role;
+sub get_all_attributes {
+ my($self) = @_;
+ my %attrs = map { %{ $self->initialize($_)->{attributes} } } reverse $self->linearized_isa;
+ return values %attrs;
+}
+
+sub new_object {
+ my $self = shift;
+ my %args = (@_ == 1 ? %{$_[0]} : @_);
+
+ my $object = bless {}, $self->name;
+
+ $self->_initialize_object($object, \%args);
+ return $object;
+}
+
+sub _initialize_object{
+ my($self, $object, $args, $ignore_triggers) = @_;
+
+ my @triggers_queue;
+
+ 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} ];
+ }
+ }
+ else { # no init arg
+ if ($attribute->has_default || $attribute->has_builder) {
+ if (!$attribute->is_lazy) {
+ 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}) && $attribute->is_weak_ref;
+ }
+ }
+ elsif($attribute->is_required) {
+ $self->throw_error("Attribute (".$attribute->name.") is required");
+ }
+ }
+ }
+
+ if(!$ignore_triggers){
+ 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{ $_[0]->{strict_constructor} }
+
+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;
+package Mouse::Meta::Attribute;
+
+require Mouse::Meta::Method::Accessor;
-use Mouse::Meta::Method::Accessor;
+sub accessor_metaclass{ $_[0]->{accessor_metaclass} || 'Mouse::Meta::Method::Accessor' }
# readers
sub has_documentation { exists $_[0]->{documentation} }
-sub accessor_metaclass(){ 'Mouse::Meta::Method::Accessor' }
+sub _process_options{
+ my($class, $name, $args) = @_;
-package
- Mouse::Meta::TypeConstraint;
+ # taken from Class::MOP::Attribute::new
+
+ defined($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 __is_parameterized { exists $_[0]->{type_parameter} }
+
sub _compiled_type_constraint{ $_[0]->{compiled_type_constraint} }
sub _compiled_type_coercion { $_[0]->{_compiled_type_coercion} }
-
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;
+}
+
+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);
+ my $self = $meta->new_object($args);
+
+ # BUILDALL
+ if( $self->can('BUILD') ) {
+ for my $class (reverse $meta->linearized_isa) {
+ my $build = Mouse::Util::get_code_ref($class, 'BUILD')
+ || next;
+
+ $self->$build($args);
+ }
+ }
+
+ return $self;
+}
+
+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 0.50_03
+
+=head1 SEE ALSO
+
+L<Mouse::XS>
+
+=cut
projects / gitmo/Mouse.git / blobdiff