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-rw-r--r--3rdparty/asio/src/tests/properties/cpp14/can_require_concept_free.cpp35
1 files changed, 35 insertions, 0 deletions
diff --git a/3rdparty/asio/src/tests/properties/cpp14/can_require_concept_free.cpp b/3rdparty/asio/src/tests/properties/cpp14/can_require_concept_free.cpp
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index 00000000000..ff5163bc02b
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+++ b/3rdparty/asio/src/tests/properties/cpp14/can_require_concept_free.cpp
@@ -0,0 +1,35 @@
+//
+// cpp14/can_require_concept_free.cpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include "asio/require_concept.hpp"
+#include <cassert>
+
+template <int>
+struct prop
+{
+ template <typename> static constexpr bool is_applicable_property_v = true;
+ static constexpr bool is_requirable_concept = true;
+};
+
+template <int>
+struct object
+{
+ template <int N>
+ friend constexpr object<N> require_concept(const object&, prop<N>)
+ {
+ return object<N>();
+ }
+};
+
+int main()
+{
+ static_assert(asio::can_require_concept_v<object<1>, prop<2>>, "");
+ static_assert(asio::can_require_concept_v<const object<1>, prop<2>>, "");
+}