Type Definition libxml::bindings::xmlXPathFuncLookupFunc

type xmlXPathFuncLookupFunc = Option<unsafe extern "C" fn(ctxt: *mut c_void, name: *const xmlChar, ns_uri: *const xmlChar) -> xmlXPathFunction>;

xmlXPathFuncLookupFunc: @ctxt: an XPath context @name: name of the function @ns_uri: the namespace name hosting this function

Prototype for callbacks used to plug function lookup in the XPath engine.

Returns the XPath function or NULL if not found.