Type Definition libxslt::bindings::xmlXPathFuncLookupFunc

type xmlXPathFuncLookupFunc = Option<unsafe extern "C" fn(*mut c_void, *const u8, *const u8) -> Option<unsafe extern "C" fn(*mut _xmlXPathParserContext, i32)>>;

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.