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/usr/share/perl/5.14.2/integer.pm is in perl-base 5.14.2-21+deb7u3.

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package integer;

our $VERSION = '1.00';

$integer::hint_bits = 0x1;

sub import {
    $^H |= $integer::hint_bits;
}

sub unimport {
    $^H &= ~$integer::hint_bits;
}

1;