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/example/while.cpp | 45 +++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 src/boost/libs/hana/example/while.cpp

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

diff --git a/src/boost/libs/hana/example/while.cpp b/src/boost/libs/hana/example/while.cpp
new file mode 100644
index 00000000..73dc27f9
--- /dev/null
+++ b/src/boost/libs/hana/example/while.cpp
@@ -0,0 +1,45 @@
+// 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/equal.hpp>
+#include <boost/hana/integral_constant.hpp>
+#include <boost/hana/less.hpp>
+#include <boost/hana/plus.hpp>
+#include <boost/hana/while.hpp>
+
+#include <vector>
+namespace hana = boost::hana;
+using namespace hana::literals;
+
+
+int main() {
+    // while_ with a Constant condition (loop is unrolled at compile-time)
+    {
+        std::vector<int> ints;
+        auto final_state = hana::while_(hana::less.than(10_c), 0_c, [&](auto i) {
+            ints.push_back(i);
+            return i + 1_c;
+        });
+
+        // The state is known at compile-time
+        BOOST_HANA_CONSTANT_CHECK(final_state == 10_c);
+
+        BOOST_HANA_RUNTIME_CHECK(ints == std::vector<int>{0, 1, 2, 3, 4, 5, 6, 7, 8, 9});
+    }
+
+    // while_ with a constexpr or runtime condition (loop is not unrolled)
+    {
+        std::vector<int> ints;
+        int final_state = hana::while_(hana::less.than(10), 0, [&](int i) {
+            ints.push_back(i);
+            return i + 1;
+        });
+
+        // The state is known only at runtime, or at compile-time if constexpr
+        BOOST_HANA_RUNTIME_CHECK(final_state == 10);
+
+        BOOST_HANA_RUNTIME_CHECK(ints == std::vector<int>{0, 1, 2, 3, 4, 5, 6, 7, 8, 9});
+    }
+}
-- 
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