Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 27 insertions, 0 deletions

diff --git a/src/boost/libs/hof/test/fail/unpack.cpp b/src/boost/libs/hof/test/fail/unpack.cpp
new file mode 100644
index 00000000..f4758be0
--- /dev/null
+++ b/src/boost/libs/hof/test/fail/unpack.cpp
@@ -0,0 +1,27 @@
+/*=============================================================================
+    Copyright (c) 2017 Paul Fultz II
+    unpack.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/unpack.hpp>
+
+struct foo
+{};
+
+namespace boost { namespace hof {
+
+template<>
+struct unpack_sequence<foo>
+{
+    template<class F, class S>
+    constexpr static int apply(F&&, S&&)
+    {
+        return 0;
+    }
+};
+}
+
+int main() {
+    boost::hof::unpack(boost::hof::always(1))(foo{});
+}