// xmlXPathCastToNumber
func (obj *XPathObject) CastToNumber() float32 {
cdbl := C.xmlXPathCastToNumber(obj.Ptr)
return float32(cdbl)
}
func (r *XPathResult) Number() float64 {
if r.Type() != XPATH_NUMBER {
panic("libxml: Not a number")
}
return float64(C.xmlXPathCastToNumber(r.ptr))
}