Function xmlXPathCastToString 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn xmlXPathCastToString(
    val: *mut _xmlXPathObject,
) -> *mut xmlChar

Cast an XPath object to its string value.

Returns a newly allocated string (caller frees with xmlFree).

UPSTREAM-PARITY

xmlChar *xmlXPathCastToString(xmlXPathObjectPtr val);