101 lines
2.4 KiB
C++
101 lines
2.4 KiB
C++
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// Copyright 2018 Daniel James
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#include "./config.hpp"
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#ifndef BOOST_HASH_TEST_STD_INCLUDES
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# include <boost/container_hash/hash.hpp>
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#endif
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#include <boost/config.hpp>
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#include <boost/core/lightweight_test.hpp>
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#if BOOST_HASH_HAS_VARIANT
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#include <variant>
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#include <string>
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void test_monostate()
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{
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std::monostate x1;
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std::monostate x2;
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boost::hash<std::monostate> hasher;
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BOOST_TEST(hasher(x1) == hasher(x2));
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}
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void test_variant_int()
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{
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std::variant<std::monostate, int> x1a;
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std::variant<std::monostate, int> x1b;
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std::variant<std::monostate, int> x2a(10);
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std::variant<std::monostate, int> x2b(x2a);
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std::variant<std::monostate, int> x3(20);
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boost::hash<std::variant<std::monostate, int> > hasher;
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BOOST_TEST(hasher(x1a) == hasher(x1a));
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BOOST_TEST(hasher(x1a) == hasher(x1b));
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BOOST_TEST(hasher(x1a) != hasher(x2a));
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BOOST_TEST(hasher(x1a) != hasher(x3));
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BOOST_TEST(hasher(x2a) == hasher(x2a));
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BOOST_TEST(hasher(x2b) == hasher(x2b));
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BOOST_TEST(hasher(x2a) != hasher(x3));
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BOOST_TEST(hasher(x3) == hasher(x3));
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}
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struct custom1 {
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int value;
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friend std::size_t hash_value(custom1 v) { return boost::hash_value(v.value); }
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};
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struct custom2 {
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int value;
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friend std::size_t hash_value(custom2 v) { return boost::hash_value(v.value); }
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};
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void test_variant_unique_types()
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{
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custom1 x11 = { 0 };
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custom1 x12 = { 1 };
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custom2 x21 = { 0 };
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custom2 x22 = { 1 };
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boost::hash<custom1> hasher1;
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boost::hash<custom2> hasher2;
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BOOST_TEST(hasher1(x11) == hasher2(x21));
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BOOST_TEST(hasher1(x11) != hasher2(x22));
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BOOST_TEST(hasher1(x12) != hasher2(x21));
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BOOST_TEST(hasher1(x12) == hasher2(x22));
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typedef std::variant<custom1, custom2> variant_type;
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variant_type y11(x11);
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variant_type y12(x12);
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variant_type y21(x21);
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variant_type y22(x22);
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boost::hash<variant_type> hasher;
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BOOST_TEST(hasher(y11) != hasher(y21));
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BOOST_TEST(hasher(y11) != hasher(y22));
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BOOST_TEST(hasher(y12) != hasher(y21));
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BOOST_TEST(hasher(y12) != hasher(y22));
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}
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#endif
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int main()
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{
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#if BOOST_HASH_HAS_VARIANT
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test_variant_int();
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test_variant_unique_types();
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#else
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BOOST_LIGHTWEIGHT_TEST_OSTREAM << "<variant> not available." << std::endl;
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#endif
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return boost::report_errors();
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}
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