From 483eb2f56657e8e7f419ab1a4fab8dce9ade8609 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 27 Apr 2024 20:24:20 +0200
Subject: Adding upstream version 14.2.21.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/boost/libs/hana/test/tuple/issue_90.cpp | 72 +++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 src/boost/libs/hana/test/tuple/issue_90.cpp

(limited to 'src/boost/libs/hana/test/tuple/issue_90.cpp')

diff --git a/src/boost/libs/hana/test/tuple/issue_90.cpp b/src/boost/libs/hana/test/tuple/issue_90.cpp
new file mode 100644
index 00000000..ab78440d
--- /dev/null
+++ b/src/boost/libs/hana/test/tuple/issue_90.cpp
@@ -0,0 +1,72 @@
+// 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/at.hpp>
+#include <boost/hana/at_key.hpp>
+#include <boost/hana/back.hpp>
+#include <boost/hana/front.hpp>
+#include <boost/hana/integral_constant.hpp>
+#include <boost/hana/tuple.hpp>
+
+#include <utility>
+namespace hana = boost::hana;
+
+
+template <typename T>
+T const& cref(T& t) { return t; }
+
+// a non-movable, non-copyable type
+struct RefOnly {
+    RefOnly() = default;
+    RefOnly(RefOnly const&) = delete;
+    RefOnly(RefOnly&&) = delete;
+};
+
+template <int i>
+struct RefOnly_i : hana::int_<i> {
+    RefOnly_i() = default;
+    RefOnly_i(RefOnly_i const&) = delete;
+    RefOnly_i(RefOnly_i&&) = delete;
+};
+
+int main() {
+    hana::tuple<RefOnly> t;
+
+    // Make sure that we return the proper reference types from `at`.
+    {
+        RefOnly&& r1 = hana::at_c<0>(std::move(t));
+        RefOnly& r2 = hana::at_c<0>(t);
+        RefOnly const& r3 = hana::at_c<0>(cref(t));
+
+        (void)r1; (void)r2; (void)r3;
+    }
+
+    // Make sure we return the proper reference types from `front`.
+    {
+        RefOnly&& r1 = hana::front(std::move(t));
+        RefOnly& r2 = hana::front(t);
+        RefOnly const& r3 = hana::front(cref(t));
+
+        (void)r1; (void)r2; (void)r3;
+    }
+
+    // Make sure we return the proper reference types from `back`.
+    {
+        RefOnly&& r1 = hana::back(std::move(t));
+        RefOnly& r2 = hana::back(t);
+        RefOnly const& r3 = hana::back(cref(t));
+
+        (void)r1; (void)r2; (void)r3;
+    }
+
+    // Make sure we return the proper reference types from `at_key`.
+    {
+        hana::tuple<RefOnly_i<3>> t{};
+        RefOnly_i<3>& r1 = hana::at_key(t, RefOnly_i<3>{});
+        RefOnly_i<3> const& r2 = hana::at_key(cref(t), RefOnly_i<3>{});
+        RefOnly_i<3>&& r3 = hana::at_key(std::move(t), RefOnly_i<3>{});
+
+        (void)r1; (void)r2; (void)r3;
+    }
+}
-- 
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