1 files changed, 44 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/ext/std/pair/issue_90.cpp b/src/boost/libs/hana/test/ext/std/pair/issue_90.cpp
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index 000000000..d8f70c56e
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+++ b/src/boost/libs/hana/test/ext/std/pair/issue_90.cpp
@@ -0,0 +1,44 @@
+// Copyright Louis Dionne 2013-2017
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+
+#include <boost/hana/ext/std/pair.hpp>
+#include <boost/hana/first.hpp>
+#include <boost/hana/second.hpp>
+
+#include <utility>
+namespace hana = boost::hana;
+
+
+template <typename T>
+T const& cref(T& t) { return t; }
+
+// a non-movable, non-copyable type
+template <int i>
+struct RefOnly {
+    RefOnly() = default;
+    RefOnly(RefOnly const&) = delete;
+    RefOnly(RefOnly&&) = delete;
+};
+
+int main() {
+    // This test makes sure that we return the proper reference types from
+    // `first` and `second`.
+    std::pair<RefOnly<0>, RefOnly<1>> p;
+
+    {
+        RefOnly<0>&& r1 = hana::first(std::move(p));
+        RefOnly<0>& r2 = hana::first(p);
+        RefOnly<0> const& r3 = hana::first(cref(p));
+
+        (void)r1; (void)r2; (void)r3;
+    }
+
+    {
+        RefOnly<1>&& r1 = hana::second(std::move(p));
+        RefOnly<1>& r2 = hana::second(p);
+        RefOnly<1> const& r3 = hana::second(cref(p));
+
+        (void)r1; (void)r2; (void)r3;
+    }
+}