JezK
Edit File: Hash.pm
package Tie::Hash; our $VERSION = '1.06'; use Carp; use warnings::register; sub new { my $pkg = shift; $pkg->TIEHASH(@_); } # Legacy support for new() sub TIEHASH { my $pkg = shift; my $pkg_new = $pkg -> can ('new'); if ($pkg_new and $pkg ne __PACKAGE__) { my $my_new = __PACKAGE__ -> can ('new'); if ($pkg_new == $my_new) { # # Prevent recursion # croak "$pkg must define either a TIEHASH() or a new() method"; } warnings::warnif ("WARNING: calling ${pkg}->new since " . "${pkg}->TIEHASH is missing"); $pkg -> new (@_); } else { croak "$pkg doesn't define a TIEHASH method"; } } sub EXISTS { my $pkg = ref $_[0]; croak "$pkg doesn't define an EXISTS method"; } sub CLEAR { my $self = shift; my $key = $self->FIRSTKEY(@_); my @keys; while (defined $key) { push @keys, $key; $key = $self->NEXTKEY(@_, $key); } foreach $key (@keys) { $self->DELETE(@_, $key); } } # The Tie::StdHash package implements standard perl hash behaviour. # It exists to act as a base class for classes which only wish to # alter some parts of their behaviour. package Tie::StdHash; # @ISA = qw(Tie::Hash); # would inherit new() only sub TIEHASH { bless {}, $_[0] } sub STORE { $_[0]->{$_[1]} = $_[2] } sub FETCH { $_[0]->{$_[1]} } sub FIRSTKEY { my $a = scalar keys %{$_[0]}; each %{$_[0]} } sub NEXTKEY { each %{$_[0]} } sub EXISTS { exists $_[0]->{$_[1]} } sub DELETE { delete $_[0]->{$_[1]} } sub CLEAR { %{$_[0]} = () } sub SCALAR { scalar %{$_[0]} } package Tie::ExtraHash; sub TIEHASH { my $p = shift; bless [{}, @_], $p } sub STORE { $_[0][0]{$_[1]} = $_[2] } sub FETCH { $_[0][0]{$_[1]} } sub FIRSTKEY { my $a = scalar keys %{$_[0][0]}; each %{$_[0][0]} } sub NEXTKEY { each %{$_[0][0]} } sub EXISTS { exists $_[0][0]->{$_[1]} } sub DELETE { delete $_[0][0]->{$_[1]} } sub CLEAR { %{$_[0][0]} = () } sub SCALAR { scalar %{$_[0][0]} } 1;