From 665047aac26ad4d96b266d87504b3a88ad21b37e Mon Sep 17 00:00:00 2001
From: djowel <djowel@gmail.com>
Date: Mon, 28 Aug 2023 08:33:46 +0800
Subject: [PATCH] avoid ODR by making this const

diff --git a/boost/phoenix/stl/tuple.hpp b/boost/phoenix/stl/tuple.hpp
index a83014ac..fb9440d2 100644
--- a/boost/phoenix/stl/tuple.hpp
+++ b/boost/phoenix/stl/tuple.hpp
@@ -109,8 +109,8 @@ namespace boost { namespace phoenix {
     // Make unpacked argument placeholders
     namespace placeholders {
         #define BOOST_PP_LOCAL_LIMITS (1, BOOST_PHOENIX_ARG_LIMIT)
-        #define BOOST_PP_LOCAL_MACRO(N)                                                \
-            auto uarg##N =                                                             \
+        #define BOOST_PP_LOCAL_MACRO(N)                                                 \
+            const auto uarg##N =                                                        \
             boost::phoenix::get_<(N)-1>(boost::phoenix::placeholders::arg1);
         #include BOOST_PP_LOCAL_ITERATE()
     }