1 # For internal Module::CoreList use only.
2 package Module::CoreList::TieHashDelta;
9 my ($class, $changed, $removed, $parent) = @_;
20 my ($self, $key) = @_;
22 if (exists $self->{changed}{$key}) {
23 return $self->{changed}{$key};
24 } elsif (exists $self->{removed}{$key}) {
26 } elsif (defined $self->{parent}) {
27 return $self->{parent}{$key};
33 my ($self, $key) = @_;
35 if (exists $self->{changed}{$key}) {
37 } elsif (exists $self->{removed}{$key}) {
39 } elsif (defined $self->{parent}) {
40 return exists $self->{parent}{$key};
48 if (not $self->{keys_inflated}) {
49 # This inflates the whole set of hashes... Somewhat expensive, but saves
50 # many tied hash calls later.
52 if (defined $self->{parent}) {
53 @parent_keys = keys %{$self->{parent}};
56 @parent_keys = grep !exists $self->{removed}{$_}, @parent_keys;
57 for my $key (@parent_keys) {
58 next if exists $self->{changed}->{$key};
59 $self->{changed}{$key} = $self->{parent}{$key};
62 $self->{keys_inflated} = 1;
65 keys %{$self->{changed}}; # reset each
71 each $self->{changed};