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- // Copyright (c) 2011-2019 Antony Polukhin
- //
- // 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 "boost/core/lightweight_test.hpp"
- #include "boost/config.hpp"
- #include "boost/variant.hpp"
- #include "boost/functional/hash/hash.hpp"
- #if !defined(BOOST_NO_CXX11_HDR_UNORDERED_SET) && !defined(BOOST_VARIANT_DO_NOT_SPECIALIZE_STD_HASH)
- #include <unordered_set>
- void test_std_hash() {
- std::unordered_set<boost::variant<int, bool> > us;
- us.insert(1);
- us.insert(true);
- BOOST_TEST(us.size() == 2);
- }
- #else
- void test_std_hash() {}
- #endif
- void run() {
- typedef boost::variant<bool, int, unsigned int, char> variant_type;
- boost::hash<variant_type> hasher;
- variant_type bool_variant1 = true;
- variant_type bool_variant2 = false;
- variant_type int_variant = 1;
- variant_type char_variant1 = '\1';
- variant_type char_variant2 = '\2';
- variant_type uint_variant = static_cast<unsigned int>(1);
- BOOST_TEST(hasher(bool_variant1) != hasher(bool_variant2));
- BOOST_TEST(hasher(bool_variant1) == hasher(bool_variant1));
- BOOST_TEST(hasher(int_variant) != hasher(uint_variant));
- BOOST_TEST(hasher(char_variant1) != hasher(uint_variant));
- BOOST_TEST(hasher(char_variant1) != hasher(char_variant2));
- BOOST_TEST(hasher(char_variant1) == hasher(char_variant1));
- BOOST_TEST(hasher(char_variant2) == hasher(char_variant2));
- }
- int main() {
- run();
- test_std_hash();
- return boost::report_errors();
- }
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