1 files changed, 70 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/comparable.cpp b/src/boost/libs/hana/test/comparable.cpp
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+++ b/src/boost/libs/hana/test/comparable.cpp
@@ -0,0 +1,70 @@
+// 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/concept/comparable.hpp>
+#include <boost/hana/equal.hpp>
+#include <boost/hana/not.hpp>
+#include <boost/hana/tuple.hpp>
+
+#include <laws/base.hpp>
+#include <laws/comparable.hpp>
+
+#include <type_traits>
+namespace hana = boost::hana;
+
+
+// Minimal EqualityComparable types
+struct eq1 { int value; };
+struct eq2 {
+    int value;
+    constexpr operator eq1() const { return {value}; }
+};
+
+template <typename T, typename U, typename = std::enable_if_t<
+    (std::is_same<T, eq1>{} || std::is_same<T, eq2>{}) &&
+    (std::is_same<U, eq1>{} || std::is_same<U, eq2>{})
+>>
+constexpr bool operator==(T a, U b)
+{ return a.value == b.value; }
+
+template <typename T, typename U, typename = std::enable_if_t<
+    (std::is_same<T, eq1>{} || std::is_same<T, eq2>{}) &&
+    (std::is_same<U, eq1>{} || std::is_same<U, eq2>{})
+>>
+constexpr bool operator!=(T a, U b)
+{ return !(a == b); }
+
+
+int main() {
+    // equal
+    {
+        // Two objects of different data types are unequal by default,
+        // and no model is provided for two objects of the same data type.
+        struct Random1 { }; struct Random2 { };
+        BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::equal(Random1{}, Random2{})));
+        static_assert(!hana::Comparable<Random1>::value, "");
+        static_assert(!hana::Comparable<Random2>::value, "");
+
+        // Provided model for EqualityComparable types
+        BOOST_HANA_CONSTEXPR_CHECK(hana::equal(eq1{0}, eq1{0}));
+        BOOST_HANA_CONSTEXPR_CHECK(hana::not_(hana::equal(eq1{0}, eq1{1})));
+        BOOST_HANA_CONSTEXPR_CHECK(hana::not_(hana::equal(eq1{1}, eq1{0})));
+
+        BOOST_HANA_CONSTEXPR_CHECK(hana::equal(eq1{0}, eq2{0}));
+        BOOST_HANA_CONSTEXPR_CHECK(hana::not_(hana::equal(eq1{0}, eq2{1})));
+        BOOST_HANA_CONSTEXPR_CHECK(hana::not_(hana::equal(eq1{1}, eq2{0})));
+
+        BOOST_HANA_CONSTEXPR_CHECK(hana::equal(eq2{0}, eq1{0}));
+        BOOST_HANA_CONSTEXPR_CHECK(hana::not_(hana::equal(eq2{0}, eq1{1})));
+        BOOST_HANA_CONSTEXPR_CHECK(hana::not_(hana::equal(eq2{1}, eq1{0})));
+    }
+
+    // laws
+    hana::test::TestComparable<int>{hana::make_tuple(0,1,2,3,4,5)};
+    hana::test::TestComparable<unsigned int>{hana::make_tuple(0u,1u,2u,3u,4u,5u)};
+    hana::test::TestComparable<long>{hana::make_tuple(0l,1l,2l,3l,4l,5l)};
+    hana::test::TestComparable<unsigned long>{hana::make_tuple(0ul,1ul,2ul,3ul,4ul,5ul)};
+    hana::test::TestComparable<eq1>{hana::make_tuple(eq1{0}, eq1{1}, eq1{2}, eq1{3}, eq1{4})};
+}