XML::XPath::Number - Simple numeric values.

This class holds simple numeric values. It doesn't support -0, +/- Infinity, or NaN, as the XPath spec says it should, but I'm not hurting anyone I don't think.

Creates a new XML::XPath::Number object, with the value in $num. Does some rudimentary numeric checking on $num to ensure it actually is a number.

Also as overloaded stringification. Returns the numeric value held.