From 1c5d4d4d22add852d11706d4370ab8e41efc6f93 Mon Sep 17 00:00:00 2001
From: Bernard Normier <bernard@zeroc.com>
Date: Mon, 3 Feb 2025 14:13:54 -0500
Subject: [PATCH] Update comment

---
 cpp/include/Ice/StreamHelpers.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/cpp/include/Ice/StreamHelpers.h b/cpp/include/Ice/StreamHelpers.h
index 15a1343b7fd..5ccc45da07e 100644
--- a/cpp/include/Ice/StreamHelpers.h
+++ b/cpp/include/Ice/StreamHelpers.h
@@ -10,7 +10,9 @@
 #include <iterator>
 #include <ostream>
 
-#if defined(_MSC_VER) // workaround for MSVC bug
+#if defined(_MSC_VER)
+// With MSVC, __has_include(<span>) evaluates to 1 in c++17 mode and the <span> header then issues a warning. This
+// is a permissible but impractical behavior. As a result, we include <span> only in c++20 mode.
 #    if _MSVC_LANG >= 202002L
 #        include <span>
 #    endif