libstdc++-v3/testsuite/ext/random/normal_mv_distribution/cons/parms.cc

   1 // { dg-do run { target c++11 } }
   2 // { dg-require-cstdint "" }
   3 //
   4 // 2008-11-24  Edward M. Smith-Rowland <3dw4rd@verizon.net>
   5 // 2012-09-04  Ulrich Drepper <drepper@gmail.com>
   6 //
   7 // Copyright (C) 2012-2024 Free Software Foundation, Inc.
   8 //
   9 // This file is part of the GNU ISO C++ Library.  This library is free
  10 // software; you can redistribute it and/or modify it under the
  11 // terms of the GNU General Public License as published by the
  12 // Free Software Foundation; either version 3, or (at your option)
  13 // any later version.
  14 //
  15 // This library is distributed in the hope that it will be useful,
  16 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 // GNU General Public License for more details.
  19 //
  20 // You should have received a copy of the GNU General Public License along
  21 // with this library; see the file COPYING3.  If not see
  22 // <http://www.gnu.org/licenses/>.
  23
  24 #include <ext/random>
  25 #include <testsuite_hooks.h>
  26
  27 void
  28 test01()
  29 {
  30   __gnu_cxx::normal_mv_distribution<2> u({5.0, 4.0}, {4.0, 9.0});
  31   VERIFY( u.mean()[0] == 5.0 );
  32   VERIFY( u.mean()[1] == 4.0 );
  33   VERIFY( u.varcov()[0] == 2.0 );
  34   VERIFY( u.varcov()[1] == 0.0 );
  35   VERIFY( u.varcov()[2] == 3.0 );
  36   typedef __gnu_cxx::normal_mv_distribution<2>::result_type result_type;
  37   VERIFY( u.min()[0] == std::numeric_limits<result_type::value_type>::lowest() );
  38   VERIFY( u.max()[0] == std::numeric_limits<result_type::value_type>::max() );
  39   VERIFY( u.min()[1] == std::numeric_limits<result_type::value_type>::lowest() );
  40   VERIFY( u.max()[1] == std::numeric_limits<result_type::value_type>::max() );
  41 }
  42
  43 void
  44 test02()
  45 {
  46   using param_type = __gnu_cxx::normal_mv_distribution<2>::param_type;
  47   const param_type p({5.0, 4.0}, {4.0, 9.0});
  48   __gnu_cxx::normal_mv_distribution<2> u(p);
  49   VERIFY( u.param() == p );
  50   VERIFY( u.param() != param_type{} );
  51   typedef __gnu_cxx::normal_mv_distribution<2>::result_type result_type;
  52   VERIFY( u.min()[0] == std::numeric_limits<result_type::value_type>::lowest() );
  53   VERIFY( u.max()[0] == std::numeric_limits<result_type::value_type>::max() );
  54   VERIFY( u.min()[1] == std::numeric_limits<result_type::value_type>::lowest() );
  55   VERIFY( u.max()[1] == std::numeric_limits<result_type::value_type>::max() );
  56 }
  57
  58 int main()
  59 {
  60   test01();
  61   test02();
  62 }