Imported Upstream version 1.64.0

[platform/upstream/boost.git] / libs / hana / test / pair / cnstr.move.cpp

diff --git a/libs/hana/test/pair/cnstr.move.cpp b/libs/hana/test/pair/cnstr.move.cpp
index 2741865..e029cd3 100644 (file)
--- a/libs/hana/test/pair/cnstr.move.cpp
+++ b/libs/hana/test/pair/cnstr.move.cpp
@@ -1,4 +1,4 @@
-// Copyright Louis Dionne 2013-2016
+// 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)
 
@@ -7,6 +7,7 @@
 #include <boost/hana/pair.hpp>
 #include <boost/hana/second.hpp>
 
+#include <type_traits>
 #include <utility>
 namespace hana = boost::hana;
 
@@ -29,6 +30,25 @@ struct MoveOnlyDerived : MoveOnly {
     MoveOnlyDerived(int data = 1) : MoveOnly(data) { }
 };
 
+template <typename Target>
+struct implicit_to {
+    constexpr operator Target() const { return Target{}; }
+};
+
+struct NoMove {
+    NoMove() = default;
+    NoMove(NoMove const&) = delete;
+    NoMove(NoMove&&) = delete;
+};
+
+// Note: It is also useful to check with a non-empty class, because that
+//       triggers different instantiations due to EBO.
+struct NoMove_nonempty {
+    NoMove_nonempty() = default;
+    NoMove_nonempty(NoMove_nonempty const&) = delete;
+    NoMove_nonempty(NoMove_nonempty&&) = delete;
+    int i;
+};
 
 int main() {
     {
@@ -45,4 +65,33 @@ int main() {
         BOOST_HANA_RUNTIME_CHECK(hana::first(p2) == MoveOnly{3});
         BOOST_HANA_RUNTIME_CHECK(hana::second(p2) == 4);
     }
+    {
+        struct target1 {
+            target1() = default;
+            target1(target1 const&) = delete;
+            target1(target1&&) = default;
+        };
+
+        struct target2 {
+            target2() = default;
+            target2(target2 const&) = delete;
+            target2(target2&&) = default;
+        };
+        using Target = hana::pair<target1, target2>;
+        Target p1(hana::make_pair(target1{}, target2{})); (void)p1;
+        Target p2(hana::make_pair(implicit_to<target1>{}, target2{}));
+        Target p3(hana::make_pair(target1{}, implicit_to<target2>{}));
+        Target p4(hana::make_pair(implicit_to<target1>{}, implicit_to<target2>{}));
+    }
+
+    // Make sure we don't define the move constructor when it shouldn't be defined.
+    {
+        using Pair1 = hana::pair<NoMove, NoMove>;
+        Pair1 pair1;
+        static_assert(!std::is_move_constructible<Pair1>::value, "");
+
+        using Pair2 = hana::pair<NoMove_nonempty, NoMove_nonempty>;
+        Pair2 pair2;
+        static_assert(!std::is_move_constructible<Pair2>::value, "");
+    }
 }