Hash: Quick attempt at supporting enums.

Thanks to Filip Konvička. [SVN r80139]
2012-08-22 11:40:27 +00:00
parent 9119b2646b
commit 05f16beaf0
3 changed files with 73 additions and 0 deletions
@@ -0,0 +1,59 @@
+
+// Copyright 2012 Daniel James.
+// 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 "./config.hpp"
+
+#ifdef TEST_STD_INCLUDES
+#  include <functional>
+#else
+#  include <boost/functional/hash.hpp>
+#endif
+
+#include <boost/detail/lightweight_test.hpp>
+
+#include <boost/mpl/assert.hpp>
+#include <boost/type_traits/is_base_and_derived.hpp>
+
+namespace test {
+	enum enum_override { enum_override1, enum_override2 };
+	std::size_t hash_value(enum_override x) { return -896532; }
+
+	enum enum1 { enum1a };
+	enum enum2 { enum2a, enum2b };
+	enum enum3 { enum3a = 574, enum3b };
+	enum enum4 { enum4a = -12574, enum4b };
+}
+
+int main() {
+	boost::hash<test::enum1> hash1;
+	boost::hash<test::enum2> hash2;
+	boost::hash<test::enum3> hash3;
+	boost::hash<test::enum4> hash4;
+	
+	BOOST_TEST(hash1(test::enum1a) == hash1(test::enum1a));
+
+	BOOST_TEST(hash2(test::enum2a) == hash2(test::enum2a));
+	BOOST_TEST(hash2(test::enum2a) != hash2(test::enum2b));
+	BOOST_TEST(hash2(test::enum2b) == hash2(test::enum2b));
+
+	BOOST_TEST(hash3(test::enum3a) == hash3(test::enum3a));
+	BOOST_TEST(hash3(test::enum3a) != hash3(test::enum3b));
+	BOOST_TEST(hash3(test::enum3b) == hash3(test::enum3b));
+
+	BOOST_TEST(hash4(test::enum4a) == hash4(test::enum4a));
+	BOOST_TEST(hash4(test::enum4a) != hash4(test::enum4b));
+	BOOST_TEST(hash4(test::enum4b) == hash4(test::enum4b));
+
+	boost::hash<test::enum_override> hash_override;
+
+	BOOST_TEST(hash_override(test::enum_override1) ==
+		hash_override(test::enum_override1));
+	BOOST_TEST(hash_override(test::enum_override1) ==
+		hash_override(test::enum_override2));
+	BOOST_TEST(hash_override(test::enum_override1) ==
+		hash_override(test::enum_override1));
+
+	return boost::report_errors();
+}