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-rw-r--r--3rdparty/asio/src/tests/properties/cpp11/can_require_concept_not_applicable_free.cpp34
1 files changed, 34 insertions, 0 deletions
diff --git a/3rdparty/asio/src/tests/properties/cpp11/can_require_concept_not_applicable_free.cpp b/3rdparty/asio/src/tests/properties/cpp11/can_require_concept_not_applicable_free.cpp
new file mode 100644
index 00000000000..5a5acbbb962
--- /dev/null
+++ b/3rdparty/asio/src/tests/properties/cpp11/can_require_concept_not_applicable_free.cpp
@@ -0,0 +1,34 @@
+//
+// cpp11/can_require_concept_not_applicable_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
+{
+ 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<object<1>, prop<2>>::value, "");
+ static_assert(!asio::can_require_concept<const object<1>, prop<2>>::value, "");
+}