ceph/src/boost/libs/multiprecision/test/git_issue_313.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 //  Copyright 2021 Christopher Kormanyos. Distributed under the Boost
   3 //  Software License, Version 1.0. (See accompanying file
   4 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #include <iomanip>
   7 #include <sstream>
   8
   9 #include <boost/multiprecision/cpp_dec_float.hpp>
  10
  11 #include "test.hpp"
  12
  13 void test()
  14 {
  15    using local_decfloat_type = boost::multiprecision::cpp_dec_float_100;
  16
  17    bool result0_is_ok = false;
  18    bool result1_is_ok = false;
  19
  20    {
  21       const local_decfloat_type test = pow(local_decfloat_type{2}, 30) * pow(local_decfloat_type{10}, -3);
  22
  23       std::stringstream strm;
  24
  25       strm << std::setprecision(std::numeric_limits<local_decfloat_type>::digits10)
  26            << std::fixed
  27            << test;
  28
  29       result0_is_ok =
  30          (strm.str() == "1073741.8240000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
  31    }
  32
  33    {
  34       const local_decfloat_type test(0.625F);
  35
  36       std::stringstream strm;
  37
  38       strm << std::setprecision(std::numeric_limits<local_decfloat_type>::digits10)
  39            << std::fixed
  40            << test;
  41
  42       result1_is_ok =
  43          (strm.str() == "0.6250000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
  44    }
  45
  46    const bool result_is_ok = (result0_is_ok && result1_is_ok);
  47
  48    BOOST_CHECK_EQUAL(result_is_ok, true);
  49 }
  50
  51 int main()
  52 {
  53    test();
  54
  55    return boost::report_errors();
  56 }