Adding upstream version 14.2.21.upstream/14.2.21upstream

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

1 files changed, 53 insertions, 0 deletions

diff --git a/src/boost/libs/hana/test/if_/non_copyable.cpp b/src/boost/libs/hana/test/if_/non_copyable.cpp
new file mode 100644
index 00000000..0de09ee4
--- /dev/null
+++ b/src/boost/libs/hana/test/if_/non_copyable.cpp
@@ -0,0 +1,53 @@
+// 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/bool.hpp>
+#include <boost/hana/eval_if.hpp>
+#include <boost/hana/fwd/not.hpp>
+#include <boost/hana/fwd/while.hpp>
+#include <boost/hana/if.hpp>
+namespace hana = boost::hana;
+
+
+// This test makes sure that if_ can be used with non-copyable branches.
+
+template <bool Value>
+struct Boolean { };
+
+namespace boost { namespace hana {
+    template <bool Value>
+    struct while_impl<Boolean<Value>> {
+        // Not implemented
+    };
+
+    template <bool Value>
+    struct not_impl<Boolean<Value>> {
+        // Not implemented
+    };
+
+    template <bool Value>
+    struct eval_if_impl<Boolean<Value>> {
+        template <typename Cond, typename Then, typename Else>
+        static constexpr decltype(auto) apply(Cond const&, Then&& t, Else&& e) {
+            return hana::eval_if(hana::bool_c<Value>, static_cast<Then&&>(t),
+                                                      static_cast<Else&&>(e));
+        }
+    };
+}}
+
+template <int v>
+struct NonCopyable {
+    static constexpr int value = v;
+    NonCopyable() = default;
+    NonCopyable(NonCopyable const&) = delete;
+    NonCopyable(NonCopyable&&) = default;
+
+    NonCopyable& operator=(NonCopyable const&) = delete;
+    NonCopyable& operator=(NonCopyable&&) = default;
+};
+
+static_assert(hana::if_(Boolean<true>{}, NonCopyable<3>{}, NonCopyable<4>{}).value == 3, "");
+static_assert(hana::if_(Boolean<false>{}, NonCopyable<3>{}, NonCopyable<4>{}).value == 4, "");
+
+int main() { }