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.
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