ceph/src/boost/libs/math/test/ztest_max_digits10.cpp

   1
   2  // Copyright 2010 Paul A. Bristow
   3 //
   4 // Distributed under the Boost Software License, Version 1.0. (See
   5 // accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt)
   7
   8 /* Temporary test program to discover which platforms support
   9
  10 numeric_limits
  11
  12 digits10 and
  13
  14 new max_digits10.
  15
  16 This is needed to produce or select a macro to avoid compilation failure in Boost.Test
  17 for platforms that do not include either or both of these.
  18
  19 BOOST_NO_CXX11_NUMERIC_LIMITS is suitable.
  20
  21
  22 [Boost C++ Libraries]
  23
  24 #5758: Boost.Test Floating-point comparison diagnostic output does not support radix 10.
  25
  26 */
  27
  28 #include <boost/config.hpp>
  29 #include <boost/version.hpp>
  30
  31 #include <iostream>
  32 #include <limits>
  33
  34 int main()
  35 {
  36    std::cout  << "Platform: " << BOOST_PLATFORM            << '\n'
  37         << "Compiler: " << BOOST_COMPILER            << '\n'
  38         << "STL     : " << BOOST_STDLIB              << '\n'
  39         << "Boost   : " << BOOST_VERSION/100000      << "."
  40                         << BOOST_VERSION/100 % 1000  << "."
  41                         << BOOST_VERSION % 100       << std::endl;
  42
  43    int digits10 = std::numeric_limits<double>::digits10;
  44    int max_digits10 = std::numeric_limits<double>::max_digits10;
  45
  46    std::cout << "std::numeric_limits<double>::digits10 = " << digits10 << std::endl;
  47
  48    std::cout << "std::numeric_limits<double>::max_digits10 = " << max_digits10 << std::endl;
  49
  50
  51 } // int main()
  52
  53 /*
  54
  55 Output:
  56
  57   Description: Autorun "J:\Cpp\MathToolkit\test\Math_test\Debug\ztest_max_digits10.exe"
  58   Platform: Win32
  59   Compiler: Microsoft Visual C++ version 10.0
  60   STL     : Dinkumware standard library version 520
  61   Boost   : 1.50.0
  62   std::numeric_limits<double>::digits10 = 15
  63   std::numeric_limits<double>::max_digits10 = 17
  64
  65
  66
  67 */