Re^3: Detecting if a scalar has a number or string

(Go back and read my reply more carefully, specifically the last paragraph.)

So, you want only those things that are either numeric scalars or which inherit from overload and can provide the numeric comparisons. That's a good definition of what you feel a number is.

To achieve that, you will probably want to do something along these lines:

use Scalar::Utils qw( blessed );
use DBI qw( looks_like_number );
use overload;

sub my_is_number
{
    my $x = shift;

    unless ( blessed( $x ) )
    {
        return looks_like_number( $x );
    }

    if ( overload::Method( $x, '<=>' ) )
    {
        return !!1;
    }

    return;
}
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