2 package Class::MOP::Package;
7 use Scalar::Util 'blessed';
10 our $VERSION = '0.02';
15 require Class::MOP::Class;
16 Class::MOP::Class->initialize(blessed($_[0]) || $_[0]);
23 my $package_name = shift;
24 # we hand-construct the class
25 # until we can bootstrap it
28 '$:package' => $package_name,
29 '%:namespace' => \%{$package_name . '::'},
36 # all these attribute readers will be bootstrapped
37 # away in the Class::MOP bootstrap section
39 sub name { $_[0]->{'$:package'} }
40 sub namespace { $_[0]->{'%:namespace'} }
52 sub _deconstruct_variable_name {
53 my ($self, $variable) = @_;
56 || confess "You must pass a variable name";
58 my ($sigil, $name) = ($variable =~ /^(.)(.*)$/);
61 || confess "The variable name must include a sigil";
63 (exists $SIGIL_MAP{$sigil})
64 || confess "I do not recognize that sigil '$sigil'";
66 return ($name, $sigil, $SIGIL_MAP{$sigil});
72 # ... these functions have to touch the symbol table itself,.. yuk
74 sub add_package_symbol {
75 my ($self, $variable, $initial_value) = @_;
77 my ($name, $sigil, $type) = $self->_deconstruct_variable_name($variable);
80 no warnings 'redefine', 'misc';
81 *{$self->name . '::' . $name} = ref $initial_value ? $initial_value : \$initial_value;
84 sub remove_package_glob {
85 my ($self, $name) = @_;
87 delete ${$self->name . '::'}{$name};
90 # ... these functions deal with stuff on the namespace level
92 sub has_package_symbol {
93 my ($self, $variable) = @_;
95 my ($name, $sigil, $type) = $self->_deconstruct_variable_name($variable);
97 return 0 unless exists $self->namespace->{$name};
98 defined *{$self->namespace->{$name}}{$type} ? 1 : 0;
101 sub get_package_symbol {
102 my ($self, $variable) = @_;
104 my ($name, $sigil, $type) = $self->_deconstruct_variable_name($variable);
106 $self->add_package_symbol($variable)
107 unless exists $self->namespace->{$name};
108 return *{$self->namespace->{$name}}{$type};
111 sub remove_package_symbol {
112 my ($self, $variable) = @_;
114 my ($name, $sigil, $type) = $self->_deconstruct_variable_name($variable);
117 # no doubt this is grossly inefficient and
118 # could be done much easier and faster in XS
120 my ($scalar, $array, $hash, $code);
121 if ($type eq 'SCALAR') {
122 $array = $self->get_package_symbol('@' . $name) if $self->has_package_symbol('@' . $name);
123 $hash = $self->get_package_symbol('%' . $name) if $self->has_package_symbol('%' . $name);
124 $code = $self->get_package_symbol('&' . $name) if $self->has_package_symbol('&' . $name);
126 elsif ($type eq 'ARRAY') {
127 $scalar = $self->get_package_symbol('$' . $name) if $self->has_package_symbol('$' . $name);
128 $hash = $self->get_package_symbol('%' . $name) if $self->has_package_symbol('%' . $name);
129 $code = $self->get_package_symbol('&' . $name) if $self->has_package_symbol('&' . $name);
131 elsif ($type eq 'HASH') {
132 $scalar = $self->get_package_symbol('$' . $name) if $self->has_package_symbol('$' . $name);
133 $array = $self->get_package_symbol('@' . $name) if $self->has_package_symbol('@' . $name);
134 $code = $self->get_package_symbol('&' . $name) if $self->has_package_symbol('&' . $name);
136 elsif ($type eq 'CODE') {
137 $scalar = $self->get_package_symbol('$' . $name) if $self->has_package_symbol('$' . $name);
138 $array = $self->get_package_symbol('@' . $name) if $self->has_package_symbol('@' . $name);
139 $hash = $self->get_package_symbol('%' . $name) if $self->has_package_symbol('%' . $name);
142 confess "This should never ever ever happen";
145 $self->remove_package_glob($name);
147 $self->add_package_symbol(('$' . $name) => $scalar) if defined $scalar;
148 $self->add_package_symbol(('@' . $name) => $array) if defined $array;
149 $self->add_package_symbol(('%' . $name) => $hash) if defined $hash;
150 $self->add_package_symbol(('&' . $name) => $code) if defined $code;
153 sub list_all_package_symbols {
155 return keys %{$self->namespace};
166 Class::MOP::Package - Package Meta Object
184 =item B<add_package_symbol>
186 =item B<get_package_symbol>
188 =item B<has_package_symbol>
190 =item B<remove_package_symbol>
192 =item B<remove_package_glob>
194 =item B<list_all_package_symbols>
200 Stevan Little E<lt>stevan@iinteractive.comE<gt>
202 Yuval Kogman E<lt>nothingmuch@woobling.comE<gt>
204 =head1 COPYRIGHT AND LICENSE
206 Copyright 2006 by Infinity Interactive, Inc.
208 L<http://www.iinteractive.com>
210 This library is free software; you can redistribute it and/or modify
211 it under the same terms as Perl itself.