From 0ab470367c73bf97820b7362994a8fdae8d499c4 Mon Sep 17 00:00:00 2001
From: yyc12345 <yyc12321@outlook.com>
Date: Wed, 13 Aug 2025 09:51:40 +0800
Subject: [PATCH] fix: fix safe num overflow ops issue under MSVC

---
 src/yycc/num/safe_op.hpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/yycc/num/safe_op.hpp b/src/yycc/num/safe_op.hpp
index e68f386..169bd0c 100644
--- a/src/yycc/num/safe_op.hpp
+++ b/src/yycc/num/safe_op.hpp
@@ -17,6 +17,11 @@
 
 // Import essential header if we are using Windows function family.
 #if defined(YYCC_HARDWARE_OVERFLOW_WIN32_FNS)
+// YYC MARK:
+// This macro is crucial for including "intsafe.h"
+// Without this, "intsafe.h" will not enable signed integral operations.
+#define ENABLE_INTSAFE_SIGNED_FUNCTIONS
+
 #include "../windows/import_guard_head.hpp"
 #include <intsafe.h>
 #include "../windows/import_guard_tail.hpp"