1 files changed, 34 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/_include/support/equivalence_class.hpp b/src/boost/libs/hana/test/_include/support/equivalence_class.hpp
new file mode 100644
index 000000000..c5e8d72e6
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+++ b/src/boost/libs/hana/test/_include/support/equivalence_class.hpp
@@ -0,0 +1,34 @@
+// 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)
+
+#ifndef TEST_SUPPORT_EQUIVALENCE_CLASS_HPP
+#define TEST_SUPPORT_EQUIVALENCE_CLASS_HPP
+
+#include <boost/hana/fwd/equal.hpp>
+
+
+struct EquivalenceClass { };
+
+template <typename Token, typename T>
+struct equivalence_class_impl {
+    Token equivalence_class;
+    T unwrap;
+    using hana_tag = EquivalenceClass;
+};
+
+template <typename Token, typename X>
+constexpr equivalence_class_impl<Token, X> equivalence_class(Token token, X x) {
+    return {token, x};
+}
+
+namespace boost { namespace hana {
+    template <>
+    struct equal_impl<EquivalenceClass, EquivalenceClass> {
+        template <typename X, typename Y>
+        static constexpr auto apply(X x, Y y)
+        { return hana::equal(x.equivalence_class, y.equivalence_class); }
+    };
+}} // end namespace boost::hana
+
+#endif // !TEST_SUPPORT_EQUIVALENCE_CLASS_HPP