<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">use strict; use warnings;

package Memoize::NDBM_File;
our $VERSION = '1.16';

use NDBM_File;
our @ISA = qw(NDBM_File);

# NDBM_File cannot store undef and will store an empty string if you try
# but it does return undef if you try to read a non-existent key
# so we can emulate exists() using defined()
sub EXISTS {
	defined shift-&gt;FETCH(@_);
}

# Perl 5.37.3 adds this EXISTS emulation to NDBM_File itself
delete $Memoize::NDBM_File::{'EXISTS'}
	if eval { NDBM_File-&gt;VERSION( '1.16' ) };

1;

__END__

=pod

=head1 NAME

Memoize::NDBM_File - glue to provide EXISTS for NDBM_File for Storable use

=head1 DESCRIPTION

This class provides L&lt;EXISTS|perltie/C&lt;EXISTS&gt;&gt; support for L&lt;NDBM_File&gt;.

L&lt;In Perl 5.37.3|https://github.com/Perl/perl5/commit/c0a1a377c02ed789f5eff667f46a2314a05c5a4c&gt;,
support for C&lt;EXISTS&gt; was added to L&lt;NDBM_File&gt; itself.
Code which requires such a perl should simply use L&lt;NBDM_File&gt; directly.

=cut
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