From 5bb304bcfae03a38d2b48f748963c5dbf2704152 Mon Sep 17 00:00:00 2001
From: Alexander Grund <Flamefire@users.noreply.github.com>
Date: Sun, 10 Nov 2024 11:47:22 +0100
Subject: [PATCH] Add `BOOST_FALLTHROUGH` for MSVC

MSVC supports this attribute for C++17 and higher since VS 2017
---
 include/boost/config/compiler/visualc.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/boost/config/compiler/visualc.hpp b/include/boost/config/compiler/visualc.hpp
index ce0fc15e3..16098b1f5 100644
--- a/include/boost/config/compiler/visualc.hpp
+++ b/include/boost/config/compiler/visualc.hpp
@@ -310,6 +310,7 @@
 
 #if BOOST_CXX_VERSION >= 201703L
 #  define BOOST_ATTRIBUTE_UNUSED [[maybe_unused]]
+#  define BOOST_FALLTHROUGH [[fallthrough]]
 #endif
 
 #ifndef BOOST_COMPILER