From 59703e68436131c0318433585780990974e28c7e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mateusz=20=C5=81oskot?= <mateusz@loskot.net>
Date: Tue, 28 Jun 2022 00:13:21 +0200
Subject: [PATCH] Do not call propagate_on_container_swap for C++14

---
 include/boost/gil/image.hpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/boost/gil/image.hpp b/include/boost/gil/image.hpp
index 6919b9e5c..86675b97d 100644
--- a/include/boost/gil/image.hpp
+++ b/include/boost/gil/image.hpp
@@ -238,10 +238,14 @@ class image
         swap(_align_in_bytes,  img._align_in_bytes);
         swap(_memory,          img._memory);
         swap(_view,            img._view);
+#ifdef BOOST_NO_CXX17_HDR_MEMORY_RESOURCE
+        swap(_alloc,           img._alloc);
+#else
         if constexpr (std::allocator_traits<Alloc>::propagate_on_container_swap::value)
             swap(_alloc, img._alloc);
         else
             BOOST_ASSERT(_alloc == img._alloc);
+#endif
         swap(_allocated_bytes, img._allocated_bytes );
     }