X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMouse%2FPurePerl.pm;h=36ef0cef0250beb2b234195b7a44dbe7e5023666;hb=823419c540f9e77090f31f11e04b14477c0372c4;hp=d2f04f3b1db1b0f6daa9845d6e02623c36460728;hpb=bf1c5d5c92ddde0cfaef2f9489d7a743216e5933;p=gitmo%2FMouse.git diff --git a/lib/Mouse/PurePerl.pm b/lib/Mouse/PurePerl.pm index d2f04f3..36ef0ce 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 B (); require Mouse::Util; -package - Mouse::Util; -use strict; -use warnings; +# taken from Class/MOP.pm +sub is_valid_class_name { + my $class = shift; -use warnings FATAL => 'redefine'; # to avoid to load Mouse::PurePerl + return 0 if ref($class); + return 0 unless defined($class); -use B (); + return 1 if $class =~ /\A \w+ (?: :: \w+ )* \z/xms; + + 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} }; @@ -84,17 +99,40 @@ 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); @@ -105,12 +143,21 @@ sub Bool { $_[0] ? $_[0] eq '1' : 1 } sub Undef { !defined($_[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 { 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 { 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 +165,7 @@ 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($_[0]) ne 'Regexp' } @@ -158,12 +205,9 @@ sub _parameterize_Maybe_for { return sub{ return !defined($_) || $check->($_); }; -}; - - +} -package - Mouse::Meta::Module; +package Mouse::Meta::Module; sub name { $_[0]->{package} } @@ -192,20 +236,43 @@ 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 $generate_class_accessor = sub { + my($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; +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() { 'Mouse::Meta::Method::Constructor' } +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}; @@ -221,11 +288,46 @@ sub get_all_attributes { 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, $ignore_triggers) = @_; + my($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 = $attribute->name; @@ -239,10 +341,11 @@ sub _initialize_object{ if ($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) { + if (!$attribute->is_lazy && !exists $object->{$slot}) { my $default = $attribute->default; my $builder = $attribute->builder; my $value = $builder ? $object->$builder() @@ -255,13 +358,17 @@ sub _initialize_object{ if ref($object->{$slot}) && $attribute->is_weak_ref; } } - elsif($attribute->is_required) { + elsif(!$is_cloning && $attribute->is_required) { $self->throw_error("Attribute (".$attribute->name.") is required"); } } } - if(!$ignore_triggers){ + if($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); @@ -275,9 +382,38 @@ sub _initialize_object{ return; } +sub is_immutable { $_[0]->{is_immutable} } + +sub strict_constructor; +*strict_constructor = $generate_class_accessor->('strict_constructor'); + +sub _report_unknown_args { + my($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; +package Mouse::Meta::Role; + +sub method_metaclass{ $_[0]->{method_metaclass} || 'Mouse::Meta::Role::Method' } sub is_anon_role{ return exists $_[0]->{anon_serial_id}; @@ -285,10 +421,49 @@ 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) = @_; -use Mouse::Meta::Method::Accessor; + 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; + +sub accessor_metaclass{ $_[0]->{accessor_metaclass} || 'Mouse::Meta::Method::Accessor' } # readers @@ -317,6 +492,7 @@ sub should_auto_deref { $_[0]->{auto_deref} } sub should_coerce { $_[0]->{coerce} } sub documentation { $_[0]->{documentation} } +sub insertion_order { $_[0]->{insertion_order} } # predicates @@ -334,20 +510,153 @@ 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} ); + + 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 -package - Mouse::Meta::TypeConstraint; + 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; + +use overload + '""' => '_as_string', + '0+' => '_identity', + '|' => '_unite', + + fallback => 1; 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 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{ @@ -396,9 +705,13 @@ 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; @@ -422,21 +735,58 @@ sub new { my $args = $class->BUILDARGS(@_); my $meta = Mouse::Meta::Class->initialize($class); - my $self = $meta->new_object($args); + return $meta->new_object($args); +} - # BUILDALL - if( $self->can('BUILD') ) { - for my $class (reverse $meta->linearized_isa) { - my $build = Mouse::Util::get_code_ref($class, 'BUILD') - || next; +sub DESTROY { + my $self = shift; - $self->$build($args); - } - } + 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; - return $self; + # 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__ @@ -446,7 +796,7 @@ Mouse::PurePerl - A Mouse guts in pure Perl =head1 VERSION -This document describes Mouse version 0.40_05 +This document describes Mouse version 0.70 =head1 SEE ALSO