From 19fcec84d8d7d21e796c7624e521b60d28ee21ed Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:45:59 +0200
Subject: Adding upstream version 16.2.11+ds.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/boost/libs/hana/example/fold_right.cpp | 38 ++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 src/boost/libs/hana/example/fold_right.cpp

(limited to 'src/boost/libs/hana/example/fold_right.cpp')

diff --git a/src/boost/libs/hana/example/fold_right.cpp b/src/boost/libs/hana/example/fold_right.cpp
new file mode 100644
index 000000000..5a9e675dd
--- /dev/null
+++ b/src/boost/libs/hana/example/fold_right.cpp
@@ -0,0 +1,38 @@
+// 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/fold_right.hpp>
+#include <boost/hana/tuple.hpp>
+
+#include <sstream>
+#include <string>
+namespace hana = boost::hana;
+
+
+auto to_string = [](auto x) {
+    std::ostringstream ss;
+    ss << x;
+    return ss.str();
+};
+
+int main() {
+    auto f = [=](auto element, std::string s) {
+        return "f(" + to_string(element) + ", " + s + ")";
+    };
+
+    // with an initial state
+    BOOST_HANA_RUNTIME_CHECK(
+        hana::fold_right(hana::make_tuple(1, '2', 3.0, 4), "5", f)
+            ==
+        "f(1, f(2, f(3, f(4, 5))))"
+    );
+
+    // without initial state
+    BOOST_HANA_RUNTIME_CHECK(
+        hana::fold_right(hana::make_tuple(1, '2', 3.0, 4, "5"), f)
+            ==
+        "f(1, f(2, f(3, f(4, 5))))"
+    );
+}
-- 
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