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/fold_right/ref.cpp | 39 +++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 src/boost/libs/hana/test/fold_right/ref.cpp

(limited to 'src/boost/libs/hana/test/fold_right')

diff --git a/src/boost/libs/hana/test/fold_right/ref.cpp b/src/boost/libs/hana/test/fold_right/ref.cpp
new file mode 100644
index 00000000..e23cd521
--- /dev/null
+++ b/src/boost/libs/hana/test/fold_right/ref.cpp
@@ -0,0 +1,39 @@
+// 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/assert.hpp>
+#include <boost/hana/at.hpp>
+#include <boost/hana/fold_right.hpp>
+#include <boost/hana/tuple.hpp>
+namespace hana = boost::hana;
+
+//
+// Make sure that we can fold_right and take arguments by reference.
+//
+
+int main() {
+    // with state
+    {
+        auto xs = hana::make_tuple(1, 2, 3);
+        int state = 99;
+
+        int& one = hana::fold_right(xs, state, [](int& i, int&) -> int& {
+            return i;
+        });
+        BOOST_HANA_RUNTIME_CHECK(one == 1);
+        one = 10;
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(xs) == 10);
+    }
+
+    // without state
+    {
+        auto xs = hana::make_tuple(1, 2, 3);
+        int& one = hana::fold_right(xs, [](int& i, int&) -> int& {
+            return i;
+        });
+        BOOST_HANA_RUNTIME_CHECK(one == 1);
+        one = 10;
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(xs) == 10);
+    }
+}
-- 
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