ceph/src/boost/libs/numeric/interval/test/pi.cpp

   1 /* Boost test/pi.cpp
   2  * test if the pi constant is correctly defined
   3  *
   4  * Copyright 2002-2003 Guillaume Melquiond, Sylvain Pion
   5  *
   6  * Distributed under the Boost Software License, Version 1.0.
   7  * (See accompanying file LICENSE_1_0.txt or
   8  * copy at http://www.boost.org/LICENSE_1_0.txt)
   9  */
  10
  11 #include <boost/numeric/interval.hpp>
  12 #include <boost/limits.hpp>
  13 #include <boost/test/minimal.hpp>
  14 #include "bugs.hpp"
  15
  16 #define PI 3.14159265358979323846
  17
  18 typedef boost::numeric::interval<int>         I_i;
  19 typedef boost::numeric::interval<float>       I_f;
  20 typedef boost::numeric::interval<double>      I_d;
  21 typedef boost::numeric::interval<long double> I_ld;
  22
  23 using boost::numeric::interval_lib::pi;
  24 using boost::numeric::interval_lib::pi_half;
  25 using boost::numeric::interval_lib::pi_twice;
  26
  27 int test_main(int, char *[]) {
  28   I_i  pi_i  = pi<I_i>();
  29   I_f  pi_f  = pi<I_f>();
  30   I_d  pi_d  = pi<I_d>();
  31   I_ld pi_ld = pi<I_ld>();
  32
  33   BOOST_CHECK(in((int)   PI, pi_i));
  34   BOOST_CHECK(in((float) PI, pi_f));
  35   BOOST_CHECK(in((double)PI, pi_d));
  36   BOOST_CHECK(subset(pi_i, widen(I_i((int)   PI), 1)));
  37   BOOST_CHECK(subset(pi_f, widen(I_f((float) PI), (std::numeric_limits<float> ::min)())));
  38   BOOST_CHECK(subset(pi_d, widen(I_d((double)PI), (std::numeric_limits<double>::min)())));
  39
  40   // We can't test the following equalities for interval<int>.
  41   I_f pi_f_half = pi_half<I_f>();
  42   I_f pi_f_twice = pi_twice<I_f>();
  43
  44   I_d pi_d_half = pi_half<I_d>();
  45   I_d pi_d_twice = pi_twice<I_d>();
  46
  47   I_ld pi_ld_half = pi_half<I_ld>();
  48   I_ld pi_ld_twice = pi_twice<I_ld>();
  49
  50   BOOST_CHECK(equal(2.0f * pi_f_half, pi_f));
  51   BOOST_CHECK(equal(2.0  * pi_d_half, pi_d));
  52   BOOST_CHECK(equal(2.0l * pi_ld_half, pi_ld));
  53
  54   BOOST_CHECK(equal(2.0f * pi_f, pi_f_twice));
  55   BOOST_CHECK(equal(2.0  * pi_d, pi_d_twice));
  56   BOOST_CHECK(equal(2.0l * pi_ld, pi_ld_twice));
  57
  58   return 0;
  59 }