In case you'd (only) use the pragma constant to declare your constants, you could use its hash %constant::declared to get the list of names to export. Something like this

Your module with the constants:

package MyConsts;

use constant {
    CONST1 => 123,
    CONST2 => 1.11,
    CONST3 => "foo",
    CONST4 => ["foo", "bar"],
};
use constant CONST5 => qw(foo bar);

use Exporter 'import';
our @EXPORT = map /([^:]+)$/, keys %constant::declared;
1;
[download]

How to make use of it:

#!/usr/bin/perl
use strict;
use warnings;
use MyConsts;

print CONST1, "\n";

# or some weirder cases (just to illustrate,
# I understand that you only need integers)
print "@{CONST4()}\n";     # -> foo bar
print "@{[CONST5]}\n";     # -> foo bar
print +(CONST5)[1], "\n";  # -> bar
[download]

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