Add built local::lib

[catagits/Gitalist.git] / local-lib5 / lib / perl5 / i486-linux-gnu-thread-multi / Class / MOP / Class / Immutable / Trait.pm

diff --git a/local-lib5/lib/perl5/i486-linux-gnu-thread-multi/Class/MOP/Class/Immutable/Trait.pm b/local-lib5/lib/perl5/i486-linux-gnu-thread-multi/Class/MOP/Class/Immutable/Trait.pm
new file mode 100644 (file)
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+++ b/local-lib5/lib/perl5/i486-linux-gnu-thread-multi/Class/MOP/Class/Immutable/Trait.pm
@@ -0,0 +1,123 @@
+package Class::MOP::Class::Immutable::Trait;
+
+use strict;
+use warnings;
+
+use MRO::Compat;
+
+use Carp 'confess';
+use Scalar::Util 'blessed', 'weaken';
+
+our $VERSION   = '0.95';
+$VERSION = eval $VERSION;
+our $AUTHORITY = 'cpan:STEVAN';
+
+# the original class of the metaclass instance
+sub _get_mutable_metaclass_name { $_[0]{__immutable}{original_class} }
+
+sub is_mutable   { 0 }
+sub is_immutable { 1 }
+
+sub _immutable_metaclass { ref $_[1] }
+
+sub superclasses {
+    my $orig = shift;
+    my $self = shift;
+    confess "This method is read-only" if @_;
+    $self->$orig;
+}
+
+sub _immutable_cannot_call {
+    my $name = shift;
+    Carp::confess "The '$name' method cannot be called on an immutable instance";
+}
+
+for my $name (qw/add_method alias_method remove_method add_attribute remove_attribute remove_package_symbol/) {
+    no strict 'refs';
+    *{__PACKAGE__."::$name"} = sub { _immutable_cannot_call($name) };
+}
+
+sub class_precedence_list {
+    my $orig = shift;
+    my $self = shift;
+    @{ $self->{__immutable}{class_precedence_list}
+            ||= [ $self->$orig ] };
+}
+
+sub linearized_isa {
+    my $orig = shift;
+    my $self = shift;
+    @{ $self->{__immutable}{linearized_isa} ||= [ $self->$orig ] };
+}
+
+sub get_all_methods {
+    my $orig = shift;
+    my $self = shift;
+    @{ $self->{__immutable}{get_all_methods} ||= [ $self->$orig ] };
+}
+
+sub get_all_method_names {
+    my $orig = shift;
+    my $self = shift;
+    @{ $self->{__immutable}{get_all_method_names} ||= [ $self->$orig ] };
+}
+
+sub get_all_attributes {
+    my $orig = shift;
+    my $self = shift;
+    @{ $self->{__immutable}{get_all_attributes} ||= [ $self->$orig ] };
+}
+
+sub get_meta_instance {
+    my $orig = shift;
+    my $self = shift;
+    $self->{__immutable}{get_meta_instance} ||= $self->$orig;
+}
+
+sub _get_method_map {
+    my $orig = shift;
+    my $self = shift;
+    $self->{__immutable}{_get_method_map} ||= $self->$orig;
+}
+
+sub add_package_symbol {
+    my $orig = shift;
+    my $self = shift;
+    confess "Cannot add package symbols to an immutable metaclass"
+        unless ( caller(3) )[3] eq 'Class::MOP::Package::get_package_symbol';
+
+    $self->$orig(@_);
+}
+
+1;
+
+__END__
+
+=pod
+
+=head1 NAME
+
+Class::MOP::Class::Immutable::Trait - Implements immutability for metaclass objects
+
+=head1 DESCRIPTION
+
+This class provides a pseudo-trait that is applied to immutable metaclass
+objects. In reality, it is simply a parent class.
+
+It implements caching and read-only-ness for various metaclass methods.
+
+=head1 AUTHOR
+
+Yuval Kogman E<lt>nothingmuch@cpan.orgE<gt>
+
+=head1 COPYRIGHT AND LICENSE
+
+Copyright 2009 by Infinity Interactive, Inc.
+
+L<http://www.iinteractive.com>
+
+This library is free software; you can redistribute it and/or modify
+it under the same terms as Perl itself.
+
+=cut
+