Delete obsolete XPointer range-to function.

third_party/libxml/src/xpath.c

 /*
  * xpath.c: XML Path Language implementation
  *          XPath is a language for addressing parts of an XML document,
  *          designed to be used by both XSLT and XPointer
  *f
  * Reference: W3C Recommendation 16 November 1999
  *     http://www.w3.org/TR/1999/REC-xpath-19991116
  * Public reference:
  *     http://www.w3.org/TR/xpath
  *
@@ skipping 10673 matching lines @@
                     /* ignore blanks */
                     ;
                 } else if (NXT(len) == ':') {
 #ifdef DEBUG_STEP
                     xmlGenericError(xmlGenericErrorContext,
                             "PathExpr: AbbrRelLocation\n");
 #endif
                     lc = 1;
                     break;
                 } else if ((NXT(len) == '(')) {
-                    /* Note Type or Function */
+                    /* Node Type or Function */
                     if (xmlXPathIsNodeType(name)) {
 #ifdef DEBUG_STEP
                         xmlGenericError(xmlGenericErrorContext,
                                 "PathExpr: Type search\n");
 #endif
                         lc = 1;
+                    } else if (ctxt->xptr &&
+                               xmlStrEqual(name, BAD_CAST "range-to")) {
+                        lc = 1;
                     } else {
 #ifdef DEBUG_STEP
                         xmlGenericError(xmlGenericErrorContext,
                                 "PathExpr: function call\n");
 #endif
                         lc = 0;
                     }
                     break;
                 } else if ((NXT(len) == '[')) {
                     /* element name */
@@ skipping 4672 matching lines @@
                          xmlXPathTranslateFunction);
 
     xmlXPathRegisterFuncNS(ctxt, (const xmlChar *)"escape-uri",
          (const xmlChar *)"http://www.w3.org/2002/08/xquery-functions",
                          xmlXPathEscapeUriFunction);
 }
 
 #endif /* LIBXML_XPATH_ENABLED */
 #define bottom_xpath
 #include "elfgcchack.h"