Pass symbol on top of stack to nextToken

src/test.cpp

@@ -511,9 +511,10 @@ private:
     if (self->empty()) {
       return true;
     }
-    auto token = self->nextToken();
+    auto top = *(self->stackPtr - 1);
+    auto token = self->nextToken(top);
     // self->debugPrint(token);
-    MUSTTAIL return table[*(self->stackPtr - 1)][token](self);
+    MUSTTAIL return table[top][token](self);
   }
 
   static bool reject(Parser2 *self) {
@@ -768,7 +769,7 @@ private:
   };
 
   const char *bufBefore;
-  Symbol nextToken() {
+  Symbol nextToken(Symbol expected) {
     maybeSkipWs();
     bufBefore = buf;
     if (len == 0) {