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# This code is part of Perl distribution Hash-Case version 1.07.
# The POD got stripped from this file by OODoc version 3.06.
# For contributors see file ChangeLog.
# This software is copyright (c) 2002-2026 by Mark Overmeer.
# This is free software; you can redistribute it and/or modify it under
# the same terms as the Perl 5 programming language system itself.
# SPDX-License-Identifier: Artistic-1.0-Perl OR GPL-1.0-or-later
package Hash::Case;{
our $VERSION = '1.07';
}
use Tie::Hash; # Tie::StdHash is a hidden package inside this :-(
use base 'Tie::StdHash';
use warnings;
use strict;
use Carp qw/croak/;
#--------------------
sub TIEHASH(@)
{ my $class = shift;
my $to = @_ % 2 ? shift : undef;
my %opts = (@_, add => $to);
(bless {}, $class)->init( \%opts );
}
# Used for case-insensitive hashes which do not need more than
# one hash.
sub native_init($)
{ my ($self, $args) = @_;
my $add = delete $args->{add};
if(!$add) { ; }
elsif(ref $add eq 'ARRAY') { $self->addPairs(@$add) }
elsif(ref $add eq 'HASH') { $self->addHashData($add) }
else { croak "cannot initialize the native hash this way" }
$self;
}
# Used for case-insensitive hashes which are implemented around
# an existing hash.
sub wrapper_init($)
{ my ($self, $args) = @_;
my $add = delete $args->{add};
if(!$add) { ; }
elsif(ref $add eq 'ARRAY') { $self->addPairs(@$add) }
elsif(ref $add eq 'HASH') { $self->setHash($add) }
else { croak "cannot initialize a wrapping hash this way" }
$self;
}
#-----------
sub addPairs(@)
{ my $self = shift;
$self->STORE(shift, shift) while @_;
$self;
}
sub addHashData($)
{ my ($self, $data) = @_;
while(my ($k, $v) = each %$data) { $self->STORE($k, $v) }
$self;
}
sub setHash($)
{ my ($self, $hash) = @_; # the native implementation is the default.
%$self = %$hash;
$self;
}
1;
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