1 files changed, 29 insertions, 0 deletions
diff --git a/src/boost/libs/hof/test/fail/implicit.cpp b/src/boost/libs/hof/test/fail/implicit.cpp
new file mode 100644
index 000000000..df81297ac
--- /dev/null
+++ b/src/boost/libs/hof/test/fail/implicit.cpp
@@ -0,0 +1,29 @@
+/*=============================================================================
+    Copyright (c) 2017 Paul Fultz II
+    implicit.cpp
+    Distributed under the Boost Software License, Version 1.0. (See accompanying
+    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+==============================================================================*/
+#include <boost/hof/implicit.hpp>
+
+template<class T>
+struct auto_caster
+{
+    template<class U>
+    T operator()(U x)
+    {
+        return T(x);
+    }
+};
+
+
+int main()
+{
+    boost::hof::implicit<auto_caster> auto_cast = {};
+    auto x = auto_cast(1.5);
+    (void)x;
+// This is not possible in c++17 due to guaranteed copy elison
+#if BOOST_HOF_HAS_STD_17 || (defined(__GNUC__) && !defined (__clang__) && __GNUC__ == 4 && __GNUC_MINOR__ < 7)
+    static_assert(false, "Always fail");
+#endif
+}