Add is_described_class<T>

test/is_described_class_test2.cpp

@@ -0,0 +1,35 @@
+// Copyright 2022 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/type_traits/integral_constant.hpp>
+#include <boost/describe/class.hpp>
+
+struct X
+{
+};
+
+BOOST_DESCRIBE_STRUCT( X, (), () )
+
+namespace boost
+{
+namespace container_hash
+{
+
+template<class T> struct is_described_class;
+template<> struct is_described_class<X>: boost::false_type {};
+
+} // namespace container_hash
+} // namespace boost
+
+#include <boost/container_hash/is_described_class.hpp>
+#include <boost/core/lightweight_test_trait.hpp>
+
+int main()
+{
+    using boost::container_hash::is_described_class;
+
+    BOOST_TEST_TRAIT_FALSE((is_described_class<X>));
+
+    return boost::report_errors();
+}