From cc9bc2387fe19d6cb130460defe52ee8ecefe968 Mon Sep 17 00:00:00 2001

From: =?UTF-8?q?=C4=90o=C3=A0n=20Tr=E1=BA=A7n=20C=C3=B4ng=20Danh?=

 <congdanhqx@gmail.com>

Date: Tue, 29 Nov 2022 07:34:17 +0700

Subject: [PATCH] stl/tuple: change uarg##N to internal linkage

8b6a9c2 (std::tuple support (Resolving #103) (#104), 2021-03-11) put

uarg##N in all translation units, which includes

boost/phoenix/stl/tuple.hpp or boost/phoenix/stl.hpp, with external

linkage. Thus, we'll run into below error:

> multiple definition of `boost::phoenix::placeholders::uarg1'

Change it to internal linkage.

---

 include/boost/phoenix/stl/tuple.hpp | 2 +-

 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/phoenix/stl/tuple.hpp b/include/boost/phoenix/stl/tuple.hpp

index a83014ac..d04ad16e 100644

--- a/include/boost/phoenix/stl/tuple.hpp

+++ b/include/boost/phoenix/stl/tuple.hpp

@@ -110,7 +110,7 @@ namespace boost { namespace phoenix {

     namespace placeholders {

         #define BOOST_PP_LOCAL_LIMITS (1, BOOST_PHOENIX_ARG_LIMIT)

         #define BOOST_PP_LOCAL_MACRO(N)                                                \

-            auto uarg##N =                                                             \

+            const auto uarg##N =                                                       \

             boost::phoenix::get_<(N)-1>(boost::phoenix::placeholders::arg1);

         #include BOOST_PP_LOCAL_ITERATE()

     }