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// Copyright (c) 2011-2025 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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