libstdc++-v3/testsuite/26_numerics/random/poisson_distribution/operators/values.cc

   1 // { dg-options "-DSIMULATOR_TEST" { target simulator } }
   2 // { dg-do run { target c++11 } }
   3 // { dg-require-cstdint "" }
   4 // { dg-require-cmath "" }
   5 //
   6 // Copyright (C) 2011-2022 Free Software Foundation, Inc.
   7 //
   8 // This file is part of the GNU ISO C++ Library.  This library is free
   9 // software; you can redistribute it and/or modify it under the
  10 // terms of the GNU General Public License as published by the
  11 // Free Software Foundation; either version 3, or (at your option)
  12 // any later version.
  13 //
  14 // This library is distributed in the hope that it will be useful,
  15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 // GNU General Public License for more details.
  18 //
  19 // You should have received a copy of the GNU General Public License along
  20 // with this library; see the file COPYING3.  If not see
  21 // <http://www.gnu.org/licenses/>.
  22
  23 // 26.5.8.4.1 Class template poisson_distribution [rand.dist.pois.poisson]
  24
  25 #include <random>
  26 #include <functional>
  27 #include <testsuite_random.h>
  28
  29 void test01()
  30 {
  31   using namespace __gnu_test;
  32
  33   std::mt19937 eng;
  34
  35   std::poisson_distribution<> pd1(3.0);
  36   auto bpd1 = std::bind(pd1, eng);
  37   testDiscreteDist(bpd1, [](int n) { return poisson_pdf(n, 3.0); } );
  38
  39   std::poisson_distribution<> pd2(15.0);
  40   auto bpd2 = std::bind(pd2, eng);
  41   testDiscreteDist(bpd2, [](int n) { return poisson_pdf(n, 15.0); } );
  42
  43   std::poisson_distribution<> pd3(30.0);
  44   auto bpd3 = std::bind(pd3, eng);
  45   testDiscreteDist(bpd3, [](int n) { return poisson_pdf(n, 30.0); } );
  46
  47   // This can take extremely long on simulators, timing out the test.
  48 #ifndef SIMULATOR_TEST
  49   // libstdc++/83237
  50   std::poisson_distribution<> pd4(37.17);
  51   auto bpd4 = std::bind(pd4, eng);
  52   testDiscreteDist<100, 2000000>(bpd4, [](int n)
  53                                  { return poisson_pdf(n, 37.17); } );
  54 #endif
  55 }
  56
  57 int main()
  58 {
  59   test01();
  60   return 0;
  61 }