From 3a22138af78d2e98c142bf94ab23229950dd118a Mon Sep 17 00:00:00 2001
From: dota17 <chenguopingdota@163.com>
Date: Sat, 13 Jun 2020 17:08:16 +0800
Subject: [PATCH] tag_null

---
 src/singledocparser.cpp | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/singledocparser.cpp b/src/singledocparser.cpp
index 3e5638b..65602af 100644
--- a/src/singledocparser.cpp
+++ b/src/singledocparser.cpp
@@ -90,16 +90,17 @@ void SingleDocParser::HandleNode(EventHandler& eventHandler) {
 
   const Token& token = m_scanner.peek();
 
-  if (token.type == Token::PLAIN_SCALAR && IsNullString(token.value)) {
+  // add non-specific tags
+  if (tag.empty())
+    tag = (token.type == Token::NON_PLAIN_SCALAR ? "!" : "?");
+  
+  if (token.type == Token::PLAIN_SCALAR 
+      && tag.compare("?") == 0 && IsNullString(token.value)) {
     eventHandler.OnNull(mark, anchor);
     m_scanner.pop();
     return;
   }
 
-  // add non-specific tags
-  if (tag.empty())
-    tag = (token.type == Token::NON_PLAIN_SCALAR ? "!" : "?");
-
   // now split based on what kind of node we should be
   switch (token.type) {
     case Token::PLAIN_SCALAR: