From c3df6d87d42ed0f4b047405a558b9850ff7b888e Mon Sep 17 00:00:00 2001
From: Chen <chenguopingdota@163.com>
Date: Thu, 16 Jul 2020 23:08:09 +0800
Subject: [PATCH] Properly allow a trailing tab character on a block scalar
 (#919)

Fixes #917
---
 src/scanscalar.cpp                  | 2 +-
 test/integration/load_node_test.cpp | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/scanscalar.cpp b/src/scanscalar.cpp
index 0a47a46..be57b1c 100644
--- a/src/scanscalar.cpp
+++ b/src/scanscalar.cpp
@@ -204,7 +204,7 @@ std::string ScanScalar(Stream& INPUT, ScanScalarParams& params) {
 
   // post-processing
   if (params.trimTrailingSpaces) {
-    std::size_t pos = scalar.find_last_not_of(' ');
+    std::size_t pos = scalar.find_last_not_of(" \t");
     if (lastEscapedChar != std::string::npos) {
       if (pos < lastEscapedChar || pos == std::string::npos) {
         pos = lastEscapedChar;
diff --git a/test/integration/load_node_test.cpp b/test/integration/load_node_test.cpp
index d0bbd4b..958e735 100644
--- a/test/integration/load_node_test.cpp
+++ b/test/integration/load_node_test.cpp
@@ -284,6 +284,11 @@ TEST(NodeTest, SpecialFlow) {
       {"{:a}", NodeType::Map, 1, "{:a: ~}"},
       {"{,}", NodeType::Map, 1, "{~: ~}"},
       {"{a:,}", NodeType::Map, 1, "{a: ~}"},
+      //testcase for the trailing TAB of scalar
+      {"key\t: value\t", NodeType::Map, 1, "key: value"},
+      {"key\t: value\t #comment", NodeType::Map, 1, "key: value"},
+      {"{key\t: value\t}", NodeType::Map, 1, "{key: value}"},
+      {"{key\t: value\t #comment\n}", NodeType::Map, 1, "{key: value}"},
   };
   for (const SingleNodeTestCase& test : tests) {
     Node node = Load(test.input);