ceph/src/boost/libs/multiprecision/test/test_float_conversions.cpp

   1 ///////////////////////////////////////////////////////////////
   2 //  Copyright 2015 John Maddock. Distributed under the Boost
   3 //  Software License, Version 1.0. (See accompanying file
   4 //  LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
   5 //
   6
   7 #ifdef _MSC_VER
   8 #define _SCL_SECURE_NO_WARNINGS
   9 #endif
  10
  11 #include <boost/detail/lightweight_test.hpp>
  12 #include <boost/array.hpp>
  13 #include "test.hpp"
  14
  15 #include <boost/multiprecision/cpp_bin_float.hpp>
  16 #include <boost/math/constants/constants.hpp>
  17
  18 int main()
  19 {
  20    using namespace boost::multiprecision;
  21
  22    static_assert((std::is_convertible<float, cpp_bin_float_single>::value), "Error check");
  23    static_assert(!(std::is_convertible<double, cpp_bin_float_single>::value), "Error check");
  24    static_assert(!(std::is_convertible<long double, cpp_bin_float_single>::value), "Error check");
  25
  26    cpp_bin_float_single s = boost::math::constants::pi<cpp_bin_float_single>();
  27    std::cout << s << std::endl;
  28
  29    typedef number<backends::cpp_bin_float<11, backends::digit_base_2, void, boost::int8_t, -14, 15>, et_off> cpp_bin_float_half;
  30
  31    static_assert(!(std::is_convertible<float, cpp_bin_float_half>::value), "Error check");
  32    static_assert(!(std::is_convertible<double, cpp_bin_float_half>::value), "Error check");
  33    static_assert(!(std::is_convertible<long double, cpp_bin_float_half>::value), "Error check");
  34 #ifdef BOOST_HAS_FLOAT128
  35    static_assert(!(std::is_convertible<__float128, cpp_bin_float_half>::value), "Error check");
  36 #endif
  37
  38    cpp_bin_float_half hs = boost::math::constants::pi<cpp_bin_float_half>();
  39    std::cout << hs << std::endl;
  40
  41    return boost::report_errors();
  42 }