test_lowest_bit.cpp 937 B

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  1. //
  2. // Copyright (C) 2018 James E. King III
  3. //
  4. // Permission to copy, use, modify, sell and distribute this software
  5. // is granted provided this copyright notice appears in all copies.
  6. // This software is provided "as is" without express or implied
  7. // warranty, and with no claim as to its suitability for any purpose.
  8. //
  9. // Distributed under the Boost Software License, Version 1.0. (See
  10. // accompanying file LICENSE_1_0.txt or copy at
  11. // http://www.boost.org/LICENSE_1_0.txt)
  12. //
  13. #include <boost/cstdint.hpp>
  14. #include <boost/dynamic_bitset/detail/lowest_bit.hpp>
  15. #include <boost/core/lightweight_test.hpp>
  16. int main(int, char*[])
  17. {
  18. for (boost::int32_t i = 1; i < 32; ++i) {
  19. BOOST_TEST_EQ(i, boost::detail::lowest_bit(1u << i));
  20. }
  21. BOOST_TEST_EQ(2, boost::detail::lowest_bit(123456788));
  22. BOOST_TEST_EQ(30, boost::detail::lowest_bit(static_cast<boost::int64_t>(1507208177123328)));
  23. return boost::report_errors();
  24. }