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    BOOST_STATIC_ASSERT((boost::is_convertible<float, cpp_bin_float_single>::value));
  23    BOOST_STATIC_ASSERT(!(boost::is_convertible<double, cpp_bin_float_single>::value));
  24    BOOST_STATIC_ASSERT(!(boost::is_convertible<long double, cpp_bin_float_single>::value));
  25
  26    cpp_bin_float_single s = boost::math::constants::pi<cpp_bin_float_single>();
  27
  28    typedef number<backends::cpp_bin_float<11, backends::digit_base_2, void, boost::int8_t, -14, 15>, et_off> cpp_bin_float_half;
  29
  30    BOOST_STATIC_ASSERT(!(boost::is_convertible<float, cpp_bin_float_half>::value));
  31    BOOST_STATIC_ASSERT(!(boost::is_convertible<double, cpp_bin_float_half>::value));
  32    BOOST_STATIC_ASSERT(!(boost::is_convertible<long double, cpp_bin_float_half>::value));
  33 #ifdef BOOST_HAS_FLOAT128
  34    BOOST_STATIC_ASSERT(!(boost::is_convertible<__float128, cpp_bin_float_half>::value));
  35 #endif
  36
  37    cpp_bin_float_half hs = boost::math::constants::pi<cpp_bin_float_half>();
  38
  39    return boost::report_errors();
  40 }