From 3493a0addc69523c353ebefc093dc700ca811f17 Mon Sep 17 00:00:00 2001
From: Menci <huanghaorui301@gmail.com>
Date: Mon, 24 Jan 2022 17:11:33 +0800
Subject: [PATCH] Fix aarch64 build

---
 adls/include/json.hpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/adls/include/json.hpp b/adls/include/json.hpp
index 06da815..f06ed58 100644
--- a/adls/include/json.hpp
+++ b/adls/include/json.hpp
@@ -8491,7 +8491,8 @@ class lexer
         std::string result;
         for (const auto c : token_string)
         {
-            if ('\x00' <= c and c <= '\x1F')
+            signed char sc = static_cast<signed char>(c);
+            if ('\x00' <= sc and sc <= '\x1F')
             {
                 // escape control characters
                 std::array<char, 9> cs{{}};