package ConstantVars;
use strict;
use warnings;

sub import {
    my $package = shift;
    die "Odd number of arguments to ConstantVars" if ! @_ % 2;
    my %constants = @_;
    my $caller = caller;
    while (my ($key,$value) = each %constants) {
        eval qq( *${caller}::${key} = \\"${value}" );
    }
}

1;