X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=gitmo%2FMouse.git;a=blobdiff_plain;f=lib%2FMouse%2FPurePerl.pm;h=94d57d888749699a97a3d49a398afe7fd874508a;hp=f5e3599f5a4cd33fa069de391455d45cfed2efad;hb=9b923ac8adb9442186c3f7cc09cd4d307d6458d7;hpb=c5f6ad05f942b8a1aab0c85e55338a6e498a2bf0

diff --git a/lib/Mouse/PurePerl.pm b/lib/Mouse/PurePerl.pm
index f5e3599..94d57d8 100644
--- a/lib/Mouse/PurePerl.pm
+++ b/lib/Mouse/PurePerl.pm
@@ -2,8 +2,7 @@ package Mouse::PurePerl;
 
 require Mouse::Util;
 
-package
-    Mouse::Util;
+package Mouse::Util;
 
 use strict;
 use warnings;
@@ -12,21 +11,39 @@ 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
-    # \*{${main::}{"Foo::"}} == \*main::Foo::
+    # \*{${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} };
@@ -92,9 +109,34 @@ sub generate_isa_predicate_for {
     return $predicate;
 }
 
+sub generate_can_predicate_for {
+    my($methods_ref, $name) = @_;
 
-package
-    Mouse::Util::TypeConstraints;
+    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';
+        *{ caller() . '::' . $name } = $predicate;
+        return;
+    }
+
+    return $predicate;
+}
+
+package Mouse::Util::TypeConstraints;
 
 use Scalar::Util qw(blessed looks_like_number openhandle);
 
@@ -107,10 +149,16 @@ 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 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($_[0]) eq 'CODE'   }
@@ -118,7 +166,7 @@ sub RegexpRef  { ref($_[0]) eq 'Regexp' }
 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' }
@@ -158,12 +206,9 @@ sub _parameterize_Maybe_for {
     return sub{
         return !defined($_) || $check->($_);
     };
-};
-
-
+}
 
-package
-    Mouse::Meta::Module;
+package Mouse::Meta::Module;
 
 sub name          { $_[0]->{package} }
 
@@ -199,9 +244,13 @@ sub add_method {
     return;
 }
 
+package Mouse::Meta::Class;
+
+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 $_[0]->{anon_serial_id};
@@ -213,12 +262,81 @@ sub linearized_isa { @{ get_linear_isa($_[0]->{package}) } }
 
 sub get_all_attributes {
     my($self) = @_;
-    my %attrs = map { %{ $self->initialize($_)->_attribute_map } } reverse $self->linearized_isa;
+    my %attrs = map { %{ $self->initialize($_)->{attributes} } } reverse $self->linearized_isa;
     return values %attrs;
 }
 
-package
-    Mouse::Meta::Role;
+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};
@@ -226,10 +344,11 @@ sub is_anon_role{
 
 sub get_roles { $_[0]->{roles} }
 
-package
-    Mouse::Meta::Attribute;
+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
 
@@ -275,15 +394,143 @@ sub has_builder          { exists $_[0]->{builder}         }
 
 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} );
 
-package
-    Mouse::Meta::TypeConstraint;
+    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}  }
@@ -337,7 +584,95 @@ sub compile_type_constraint{
     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__
@@ -348,7 +683,7 @@ Mouse::PurePerl - A Mouse guts in pure Perl
 
 =head1 VERSION
 
-This document describes Mouse version 0.40_05
+This document describes Mouse version 0.50_03
 
 =head1 SEE ALSO