use Scalar::Util 'blessed';
use Carp 'confess';
-our $VERSION = '0.01';
+our $VERSION = '0.02';
+our $AUTHORITY = 'cpan:STEVAN';
+
+use base 'Class::MOP::Object';
# introspection
# creation ...
sub initialize {
- my ($class, $package) = @_;
- bless { '$:package' => $package } => $class;
+ my $class = shift;
+ my $package_name = shift;
+ # we hand-construct the class
+ # until we can bootstrap it
+ no strict 'refs';
+ return bless {
+ '$:package' => $package_name,
+ '%:namespace' => \%{$package_name . '::'},
+ } => $class;
}
# Attributes
# all these attribute readers will be bootstrapped
# away in the Class::MOP bootstrap section
-sub name { $_[0]->{'$:package'} }
+sub name { $_[0]->{'$:package'} }
+sub namespace { $_[0]->{'%:namespace'} }
-# Class attributes
+# utility methods
{
my %SIGIL_MAP = (
'%' => 'HASH',
'&' => 'CODE',
);
-
- sub add_package_symbol {
- my ($self, $variable, $initial_value) = @_;
+ sub _deconstruct_variable_name {
+ my ($self, $variable) = @_;
+
(defined $variable)
|| confess "You must pass a variable name";
-
+
my ($sigil, $name) = ($variable =~ /^(.)(.*)$/);
-
+
(defined $sigil)
|| confess "The variable name must include a sigil";
-
+
(exists $SIGIL_MAP{$sigil})
- || confess "I do not recognize that sigil '$sigil'";
-
- no strict 'refs';
- no warnings 'misc';
- *{$self->name . '::' . $name} = $initial_value;
+ || confess "I do not recognize that sigil '$sigil'";
+
+ return ($name, $sigil, $SIGIL_MAP{$sigil});
}
+}
- sub has_package_symbol {
- my ($self, $variable) = @_;
- (defined $variable)
- || confess "You must pass a variable name";
+# Class attributes
- my ($sigil, $name) = ($variable =~ /^(.)(.*)$/);
-
- (defined $sigil)
- || confess "The variable name must include a sigil";
-
- (exists $SIGIL_MAP{$sigil})
- || confess "I do not recognize that sigil '$sigil'";
+# ... these functions have to touch the symbol table itself,.. yuk
+
+sub add_package_symbol {
+ my ($self, $variable, $initial_value) = @_;
+
+ my ($name, $sigil, $type) = $self->_deconstruct_variable_name($variable);
+
+ no strict 'refs';
+ no warnings 'redefine', 'misc';
+ *{$self->name . '::' . $name} = ref $initial_value ? $initial_value : \$initial_value;
+}
+
+sub remove_package_glob {
+ my ($self, $name) = @_;
+ no strict 'refs';
+ delete ${$self->name . '::'}{$name};
+}
+
+# ... these functions deal with stuff on the namespace level
+
+sub has_package_symbol {
+ my ($self, $variable) = @_;
+
+ my ($name, $sigil, $type) = $self->_deconstruct_variable_name($variable);
+
+ return 0 unless exists $self->namespace->{$name};
- no strict 'refs';
- defined *{$self->name . '::' . $name}{$SIGIL_MAP{$sigil}} ? 1 : 0;
+ # FIXME:
+ # For some really stupid reason
+ # a typeglob will have a default
+ # value of \undef in the SCALAR
+ # slot, so we need to work around
+ # this. Which of course means that
+ # if you put \undef in your scalar
+ # then this is broken.
+ if ($type eq 'SCALAR') {
+ my $val = *{$self->namespace->{$name}}{$type};
+ defined $$val ? 1 : 0;
}
+ else {
+ defined *{$self->namespace->{$name}}{$type} ? 1 : 0;
+ }
+}
- sub get_package_symbol {
- my ($self, $variable) = @_;
- (defined $variable)
- || confess "You must pass a variable name";
-
- my ($sigil, $name) = ($variable =~ /^(.)(.*)$/);
-
- (defined $sigil)
- || confess "The variable name must include a sigil";
-
- (exists $SIGIL_MAP{$sigil})
- || confess "I do not recognize that sigil '$sigil'";
-
- no strict 'refs';
- return *{$self->name . '::' . $name}{$SIGIL_MAP{$sigil}};
+sub get_package_symbol {
+ my ($self, $variable) = @_;
- }
+ my ($name, $sigil, $type) = $self->_deconstruct_variable_name($variable);
- sub remove_package_symbol {
- my ($self, $variable) = @_;
-
- (defined $variable)
- || confess "You must pass a variable name";
+ $self->add_package_symbol($variable)
+ unless exists $self->namespace->{$name};
+ return *{$self->namespace->{$name}}{$type};
+}
+
+sub remove_package_symbol {
+ my ($self, $variable) = @_;
+
+ my ($name, $sigil, $type) = $self->_deconstruct_variable_name($variable);
+
+ # FIXME:
+ # no doubt this is grossly inefficient and
+ # could be done much easier and faster in XS
+
+ my ($scalar, $array, $hash, $code);
+ if ($type eq 'SCALAR') {
+ $array = $self->get_package_symbol('@' . $name) if $self->has_package_symbol('@' . $name);
+ $hash = $self->get_package_symbol('%' . $name) if $self->has_package_symbol('%' . $name);
+ $code = $self->get_package_symbol('&' . $name) if $self->has_package_symbol('&' . $name);
+ }
+ elsif ($type eq 'ARRAY') {
+ $scalar = $self->get_package_symbol('$' . $name) if $self->has_package_symbol('$' . $name);
+ $hash = $self->get_package_symbol('%' . $name) if $self->has_package_symbol('%' . $name);
+ $code = $self->get_package_symbol('&' . $name) if $self->has_package_symbol('&' . $name);
+ }
+ elsif ($type eq 'HASH') {
+ $scalar = $self->get_package_symbol('$' . $name) if $self->has_package_symbol('$' . $name);
+ $array = $self->get_package_symbol('@' . $name) if $self->has_package_symbol('@' . $name);
+ $code = $self->get_package_symbol('&' . $name) if $self->has_package_symbol('&' . $name);
+ }
+ elsif ($type eq 'CODE') {
+ $scalar = $self->get_package_symbol('$' . $name) if $self->has_package_symbol('$' . $name);
+ $array = $self->get_package_symbol('@' . $name) if $self->has_package_symbol('@' . $name);
+ $hash = $self->get_package_symbol('%' . $name) if $self->has_package_symbol('%' . $name);
+ }
+ else {
+ confess "This should never ever ever happen";
+ }
- my ($sigil, $name) = ($variable =~ /^(.)(.*)$/);
-
- (defined $sigil)
- || confess "The variable name must include a sigil";
+ $self->remove_package_glob($name);
- (exists $SIGIL_MAP{$sigil})
- || confess "I do not recognize that sigil '$sigil'";
-
- no strict 'refs';
- if ($SIGIL_MAP{$sigil} eq 'SCALAR') {
- undef ${$self->name . '::' . $name};
- }
- elsif ($SIGIL_MAP{$sigil} eq 'ARRAY') {
- undef @{$self->name . '::' . $name};
- }
- elsif ($SIGIL_MAP{$sigil} eq 'HASH') {
- undef %{$self->name . '::' . $name};
- }
- elsif ($SIGIL_MAP{$sigil} eq 'CODE') {
- undef &{$self->name . '::' . $name};
- }
- else {
- confess "This should never ever ever happen";
- }
- }
+ $self->add_package_symbol(('$' . $name) => $scalar) if defined $scalar;
+ $self->add_package_symbol(('@' . $name) => $array) if defined $array;
+ $self->add_package_symbol(('%' . $name) => $hash) if defined $hash;
+ $self->add_package_symbol(('&' . $name) => $code) if defined $code;
+}
+sub list_all_package_symbols {
+ my ($self) = @_;
+ return keys %{$self->namespace};
}
1;
=item B<name>
+=item B<namespace>
+
=item B<add_package_symbol>
=item B<get_package_symbol>
=item B<remove_package_symbol>
+=item B<remove_package_glob>
+
+=item B<list_all_package_symbols>
+
=back
-=head1 AUTHOR
+=head1 AUTHORS
Stevan Little E<lt>stevan@iinteractive.comE<gt>
+Yuval Kogman E<lt>nothingmuch@woobling.comE<gt>
+
=head1 COPYRIGHT AND LICENSE
Copyright 2006 by Infinity Interactive, Inc.
projects / gitmo/Class-MOP.git / blobdiff