* return error if it doesn't exist. */
    Var **arrayPtrPtr)		/* If the name refers to an element of an
				 * array, *arrayPtrPtr gets filled in with
				 * address of array variable. Otherwise this
				 * is set to NULL. */
{
    Interp *iPtr = (Interp *) interp;

    register Var *varPtr;	/* Points to the variable's in-frame Var
				 * structure. */
    const char *part1;
    int index, len1, len2;
    int parsed = 0;
    Tcl_Obj *objPtr;
    const Tcl_ObjType *typePtr = part1Ptr->typePtr;
    const char *errMsg = NULL;
    CallFrame *varFramePtr = iPtr->varFramePtr;
    const char *part2 = part2Ptr? TclGetString(part2Ptr):NULL;
    *arrayPtrPtr = NULL;

    if (typePtr == &localVarNameType) {
	int localIndex;

    localVarNameTypeHandling:
	localIndex = PTR2INT(part1Ptr->internalRep.twoPtrValue.ptr2);
	if (HasLocalVars(varFramePtr)
		&& !(flags & (TCL_GLOBAL_ONLY | TCL_NAMESPACE_ONLY))
		&& (localIndex < varFramePtr->numCompiledLocals)) {
	    /*
	     * Use the cached index if the names coincide.
	     */

	    Tcl_Obj *namePtr = part1Ptr->internalRep.twoPtrValue.ptr1;
	    Tcl_Obj *checkNamePtr = localName(iPtr->varFramePtr, localIndex);

	    if ((!namePtr && (checkNamePtr == part1Ptr)) ||
		    (namePtr && (checkNamePtr == namePtr))) {
		varPtr = (Var *) &(varFramePtr->compiledLocals[localIndex]);
		goto donePart1;
	    }
	}

	    typePtr = part1Ptr->typePtr;
	    if (typePtr == &localVarNameType) {
		goto localVarNameTypeHandling;
	    }
	}
	parsed = 1;
    }
    part1 = TclGetStringFromObj(part1Ptr, &len1);

    if (!parsed && len1 && (*(part1 + len1 - 1) == ')')) {

	/*
	 * part1Ptr is possibly an unparsed array element.
	 */

	register int i;



	len2 = -1;

	for (i = 0; i < len1; i++) {


	    if (*(part1 + i) == '(') {
		if (part2Ptr != NULL) {
		    if (flags & TCL_LEAVE_ERR_MSG) {
			TclObjVarErrMsg(interp, part1Ptr, part2Ptr, msg,
				needArray, -1);
			Tcl_SetErrorCode(interp, "TCL", "VALUE", "VARNAME",
				NULL);
		    }
		    return NULL;
		}

		/*
		 * part1Ptr points to an array element; first copy the element
		 * name to a new string part2.
		 */

		part2 = part1 + i + 1;
		len2 = len1 - i - 2;
		len1 = i;

		part2Ptr = Tcl_NewStringObj(part2, len2);

		/*
		 * Free the internal rep of the original part1Ptr, now renamed
		 * objPtr, and set it to tclParsedVarNameType.
		 */

		objPtr = part1Ptr;
		TclFreeIntRep(objPtr);
		objPtr->typePtr = &tclParsedVarNameType;

		/*
		 * Define a new string object to hold the new part1Ptr, i.e.,
		 * the array name. Set the internal rep of objPtr, reset
		 * typePtr and part1 to contain the references to the array
		 * name.
		 */

		TclNewStringObj(part1Ptr, part1, len1);
		Tcl_IncrRefCount(part1Ptr);

		objPtr->internalRep.twoPtrValue.ptr1 = part1Ptr;
		Tcl_IncrRefCount(part2Ptr);
		objPtr->internalRep.twoPtrValue.ptr2 = part2Ptr;


		typePtr = part1Ptr->typePtr;
		part1 = TclGetString(part1Ptr);
		break;
	    }
	}
    }

  doneParsing:
    /*
     * part1Ptr is not an array element; look it up, and convert it to one of
     * the cached types if possible.
     */

    TclFreeIntRep(part1Ptr);

    varPtr = TclLookupSimpleVar(interp, part1Ptr, flags, createPart1,
	    &errMsg, &index);
    if (varPtr == NULL) {
	if ((errMsg != NULL) && (flags & TCL_LEAVE_ERR_MSG)) {
	    TclObjVarErrMsg(interp, part1Ptr, part2Ptr, msg, errMsg, -1);
	    Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "VARNAME",
		    TclGetString(part1Ptr), NULL);
	}
	return NULL;
    }

    /*
     * Cache the newly found variable if possible.
     */


    if (index >= 0) {
	/*
	 * An indexed local variable.
	 */
	Tcl_Obj *cachedNamePtr = localName(iPtr->varFramePtr, index);

	part1Ptr->typePtr = &localVarNameType;
	if (part1Ptr != cachedNamePtr) {
	    part1Ptr->internalRep.twoPtrValue.ptr1 = cachedNamePtr;
	    Tcl_IncrRefCount(cachedNamePtr);
	    if (cachedNamePtr->typePtr != &localVarNameType
		    || cachedNamePtr->internalRep.twoPtrValue.ptr1 != NULL) {