From e9f986d11e046572aaf138f330c29f26182f794c Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Wed, 24 Oct 2018 12:06:45 +0300
Subject: [PATCH] Add compile-fail test for const boost::Wrapper

---
 test/swap/Jamfile.v2             |  9 +++++++++
 test/swap/const_wrapper_fail.cpp | 28 ++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 test/swap/const_wrapper_fail.cpp

diff --git a/test/swap/Jamfile.v2 b/test/swap/Jamfile.v2
index 8384c93..091f403 100644
--- a/test/swap/Jamfile.v2
+++ b/test/swap/Jamfile.v2
@@ -16,6 +16,9 @@ local compile_tests =
     mixed_headers_2.cpp
     ;
 
+local compile_fail_tests =
+    const_wrapper_fail.cpp ;
+
 local run_tests =
     primitive.cpp
     specialized_in_boost.cpp
@@ -49,6 +52,12 @@ rule test_all
         all_rules += [ compile $(file) : : "swap-$(test_name)" ] ;
     }
 
+    for file in $(compile_fail_tests)
+    {
+        local test_name = [ MATCH "([^.]*).cpp$" : $(file) ] ;
+        all_rules += [ compile-fail $(file) : : "swap-$(test_name)" ] ;
+    }
+
     for file in $(run_tests)
     {
         local test_name = [ MATCH "([^.]*).cpp$" : $(file) ] ;
diff --git a/test/swap/const_wrapper_fail.cpp b/test/swap/const_wrapper_fail.cpp
new file mode 100644
index 0000000..da2e4c6
--- /dev/null
+++ b/test/swap/const_wrapper_fail.cpp
@@ -0,0 +1,28 @@
+// Copyright 2018 Andrzej Krzemieński
+// Copyright 2018 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+
+#include <boost/core/swap.hpp>
+
+namespace boost
+{
+  
+template<class T> struct Wrapper
+{
+    T value;
+};
+
+template<class T> inline void swap( Wrapper<T> & w, Wrapper<T> & v )
+{
+    boost::swap( w, v );
+}
+  
+} // namespace boost
+ 
+int main()
+{
+    boost::Wrapper<int> const w = { 2 };
+    boost::Wrapper<int> const v = { 3 };
+
+    swap( w, v );
+}