ceph/src/boost/libs/variant/test/hash_variant_test.cpp

   1 // Copyright (c) 2011-2019 Antony Polukhin
   2 //
   3 // Distributed under the Boost Software License, Version 1.0. (See
   4 // accompanying file LICENSE_1_0.txt or copy at
   5 // http://www.boost.org/LICENSE_1_0.txt)
   6
   7 #include "boost/core/lightweight_test.hpp"
   8
   9 #include "boost/config.hpp"
  10 #include "boost/variant.hpp"
  11 #include "boost/functional/hash/hash.hpp"
  12
  13 #if !defined(BOOST_NO_CXX11_HDR_UNORDERED_SET) && !defined(BOOST_VARIANT_DO_NOT_SPECIALIZE_STD_HASH)
  14
  15 #include <unordered_set>
  16
  17 void test_std_hash() {
  18     std::unordered_set<boost::variant<int, bool> > us;
  19     us.insert(1);
  20     us.insert(true);
  21     BOOST_TEST(us.size() == 2);
  22 }
  23
  24 #else
  25 void test_std_hash() {}
  26 #endif
  27
  28
  29 void run() {
  30     typedef boost::variant<bool, int, unsigned int, char> variant_type;
  31     boost::hash<variant_type> hasher;
  32
  33     variant_type bool_variant1 = true;
  34     variant_type bool_variant2 = false;
  35     variant_type int_variant = 1;
  36     variant_type char_variant1 = '\1';
  37     variant_type char_variant2 = '\2';
  38     variant_type uint_variant = static_cast<unsigned int>(1);
  39
  40     BOOST_TEST(hasher(bool_variant1) != hasher(bool_variant2));
  41     BOOST_TEST(hasher(bool_variant1) == hasher(bool_variant1));
  42     BOOST_TEST(hasher(int_variant) != hasher(uint_variant));
  43     BOOST_TEST(hasher(char_variant1) != hasher(uint_variant));
  44     BOOST_TEST(hasher(char_variant1) != hasher(char_variant2));
  45     BOOST_TEST(hasher(char_variant1) == hasher(char_variant1));
  46     BOOST_TEST(hasher(char_variant2) == hasher(char_variant2));
  47 }
  48
  49 int main() {
  50     run();
  51     test_std_hash();
  52     return boost::report_errors();
  53 }
  54