X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=gitmo%2FMouse.git;a=blobdiff_plain;f=lib%2FMouse%2FPurePerl.pm;h=68c9eb57e52d5cb5ba2f6439d5fa8a4030c534d6;hp=383c0c8e69734d990062c05a6a980ee87cba2b49;hb=c6a03cb1923f83f46d5e10a11baa13c188cef007;hpb=f18345f1ff14d11b71695cde4b67638ae942af8c

diff --git a/lib/Mouse/PurePerl.pm b/lib/Mouse/PurePerl.pm
index 383c0c8..68c9eb5 100644
--- a/lib/Mouse/PurePerl.pm
+++ b/lib/Mouse/PurePerl.pm
@@ -1,16 +1,26 @@
 package Mouse::PurePerl;
+# 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 Scalar::Util ();
+use B ();
 
 require Mouse::Util;
 
-package
-    Mouse::Util;
+# taken from Class/MOP.pm
+sub is_valid_class_name {
+    my $class = shift;
 
-use strict;
-use warnings;
+    return 0 if ref($class);
+    return 0 unless defined($class);
 
-use warnings FATAL => 'redefine'; # to avoid to load Mouse::PurePerl
+    return 1 if $class =~ /\A \w+ (?: :: \w+ )* \z/xms;
 
-use B ();
+    return 0;
+}
 
 sub is_class_loaded {
     my $class = shift;
@@ -18,15 +28,20 @@ sub is_class_loaded {
     return 0 if ref($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} };
@@ -84,33 +99,67 @@ sub generate_isa_predicate_for {
     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;
+    }
+
+    return $predicate;
+}
 
-package
-    Mouse::Util::TypeConstraints;
+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'   }
@@ -118,10 +167,12 @@ sub RegexpRef  { ref($_[0]) eq 'Regexp' }
 sub GlobRef    { ref($_[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') }
@@ -158,12 +209,9 @@ sub _parameterize_Maybe_for {
     return sub{
         return !defined($_) || $check->($_);
     };
-};
-
-
+}
 
-package
-    Mouse::Meta::Module;
+package Mouse::Meta::Module;
 
 sub name          { $_[0]->{package} }
 
@@ -192,87 +240,37 @@ sub add_method {
 
     $self->{methods}->{$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 %SIGIL_MAP = (
-    '$' => 'SCALAR',
-    '@' => 'ARRAY',
-    '%' => 'HASH',
-    '&' => 'CODE',
-    '*' => 'GLOB',
-);
-
-sub _deconstruct_variable_name {
-    my($self, $variable) = @_;
-
-    (defined $variable)
-        || $self->throw_error("You must pass a variable name");
-
-    my $sigil = substr($variable, 0, 1, '');
-
-    (defined $sigil)
-        || $self->throw_error("The variable name must include a sigil");
-
-    (exists $SIGIL_MAP{$sigil})
-        || $self->throw_error("I do not recognize that sigil '$sigil'");
-
-    return ($variable, $SIGIL_MAP{$sigil});
-}
-
-sub has_package_symbol {
-    my($self, $variable) = @_;
-
-    my($name, $type) = $self->_deconstruct_variable_name($variable);
-
-    my $namespace = $self->namespace;
-
-    return 0 unless exists $namespace->{$name};
-
-    my $entry_ref = \$namespace->{$name};
-    if ( ref($entry_ref) eq 'GLOB' ) {
-        return defined( *{$entry_ref}{$type} );
-    }
-    else {
-        # a symbol table entry can be -1 (stub), string (stub with prototype),
-        # or reference (constant)
-        return $type eq 'CODE';
-    }
-}
-
-sub get_package_symbol {
-    my ($self, $variable) = @_;
-
-    my($name, $type) = $self->_deconstruct_variable_name($variable);
-
-    my $namespace = $self->namespace;
-
-    return undef
-        unless exists $namespace->{$name};
+my $generate_class_accessor = sub {
+    my($name) = @_;
+    return sub {
+        my $self = shift;
+        if(@_) {
+            return $self->{$name} = shift;
+        }
 
-    my $entry_ref = \$namespace->{$name};
+        foreach my $class($self->linearized_isa) {
+            my $meta = Mouse::Util::get_metaclass_by_name($class)
+                or next;
 
-    if ( ref($entry_ref) eq 'GLOB' ) {
-        return *{$entry_ref}{$type};
-    }
-    else {
-        if ( $type eq 'CODE' ) {
-            no strict 'refs';
-            return \&{ $self->name . '::' . $name };
-        }
-        else {
-            return undef;
+            if(exists $meta->{$name}) {
+                return $meta->{$name};
+            }
         }
-    }
-}
+        return undef;
+    };
+};
+
 
+package Mouse::Meta::Class;
 
-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' }
@@ -286,81 +284,86 @@ sub is_anon_class{
 
 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 $self->linearized_isa;
-    return values %attrs;
-}
+sub linearized_isa { @{ Mouse::Util::get_linear_isa($_[0]->{package}) } }
 
 sub new_object {
-    my $self = shift;
+    my $meta = shift;
     my %args = (@_ == 1 ? %{$_[0]} : @_);
 
-    my $object = bless {}, $self->name;
+    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;
 
-    $self->_initialize_object($object, \%args);
+            $object->$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, $ignore_triggers) = @_;
+    my($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};
+}
 
-    my @triggers_queue;
+sub get_all_attributes {
+    my($self) = @_;
+    return @{ $self->{_mouse_cache}{all_attributes}
+        ||= $self->_calculate_all_attributes };
+}
 
-    foreach my $attribute ($self->get_all_attributes) {
-        my $init_arg = $attribute->init_arg;
-        my $slot     = $attribute->name;
+sub is_immutable {  $_[0]->{is_immutable} }
 
-        if (defined($init_arg) && exists($args->{$init_arg})) {
-            $object->{$slot} = $attribute->_coerce_and_verify($args->{$init_arg}, $object);
+sub strict_constructor;
+*strict_constructor = $generate_class_accessor->('strict_constructor');
 
-            weaken($object->{$slot})
-                if ref($object->{$slot}) && $attribute->is_weak_ref;
+sub _report_unknown_args {
+    my($metaclass, $attrs, $args) = @_;
 
-            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");
-            }
+    my @unknowns;
+    my %init_args;
+    foreach my $attr(@{$attrs}){
+        my $init_arg = $attr->init_arg;
+        if(defined $init_arg){
+            $init_args{$init_arg}++;
         }
     }
 
-    if(!$ignore_triggers){
-        foreach my $trigger_and_value(@triggers_queue){
-            my($trigger, $value) = @{$trigger_and_value};
-            $trigger->($object, $value);
+    while(my $key = each %{$args}){
+        if(!exists $init_args{$key}){
+            push @unknowns, $key;
         }
     }
 
-    if($self->is_anon_class){
-        $object->{__METACLASS__} = $self;
-    }
-
-    return;
+    $metaclass->throw_error( sprintf
+        "Unknown attribute passed to the constructor of %s: %s",
+        $metaclass->name, Mouse::Util::english_list(@unknowns),
+    );
 }
 
-
-package
-    Mouse::Meta::Role;
+package Mouse::Meta::Role;
 
 sub method_metaclass{ $_[0]->{method_metaclass} || 'Mouse::Meta::Role::Method' }
 
@@ -370,8 +373,45 @@ sub is_anon_role{
 
 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;
 
 require Mouse::Meta::Method::Accessor;
 
@@ -404,6 +444,7 @@ sub should_auto_deref    { $_[0]->{auto_deref}             }
 sub should_coerce        { $_[0]->{coerce}                 }
 
 sub documentation        { $_[0]->{documentation}          }
+sub insertion_order      { $_[0]->{insertion_order}        }
 
 # predicates
 
@@ -421,18 +462,155 @@ sub has_builder          { exists $_[0]->{builder}         }
 
 sub has_documentation    { exists $_[0]->{documentation}   }
 
-package
-    Mouse::Meta::TypeConstraint;
+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});
+        }
+    }
+
+    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;
+
+use overload
+    '""' => '_as_string',
+    '0+' => '_identity',
+    '|'  => '_unite',
+
+    fallback => 1;
 
 sub name    { $_[0]->{name}    }
 sub parent  { $_[0]->{parent}  }
 sub message { $_[0]->{message} }
 
-sub _compiled_type_constraint{ $_[0]->{compiled_type_constraint} }
+sub _identity  { Scalar::Util::refaddr($_[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 has_coercion{ exists $_[0]->{_compiled_type_coercion} }
+sub __is_parameterized { exists $_[0]->{type_parameter} }
+sub has_coercion {       exists $_[0]->{_compiled_type_coercion} }
 
 
 sub compile_type_constraint{
@@ -481,9 +659,13 @@ sub compile_type_constraint{
     return;
 }
 
-package
-    Mouse::Object;
+sub check {
+    my $self = shift;
+    return $self->_compiled_type_constraint->(@_);
+}
+
 
+package Mouse::Object;
 
 sub BUILDARGS {
     my $class = shift;
@@ -501,25 +683,8 @@ sub BUILDARGS {
 
 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;
+    my $args  = $class->BUILDARGS(@_);
+    return $class->meta->new_object($args);
 }
 
 sub DESTROY {
@@ -527,12 +692,10 @@ sub DESTROY {
 
     return unless $self->can('DEMOLISH'); # short circuit
 
-    local $?;
-
     my $e = do{
+        local $?;
         local $@;
         eval{
-
             # DEMOLISHALL
 
             # We cannot count on being able to retrieve a previously made
@@ -544,7 +707,7 @@ sub DESTROY {
                 my $demolish = Mouse::Util::get_code_ref($class, 'DEMOLISH')
                     || next;
 
-                $self->$demolish();
+                $self->$demolish($Mouse::Util::in_global_destruction);
             }
         };
         $@;
@@ -554,6 +717,24 @@ sub DESTROY {
     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__
 
@@ -563,7 +744,7 @@ Mouse::PurePerl - A Mouse guts in pure Perl
 
 =head1 VERSION
 
-This document describes Mouse version 0.40_08
+This document describes Mouse version 0.79
 
 =head1 SEE ALSO