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

   1 // { dg-do run { target c++11 } }
   2 // { dg-require-cstdint "" }
   3 //
   4 // Copyright (C) 2011-2020 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11 //
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // 26.5.8.6.1 Class template discrete_distribution [rand.dist.samp.discrete]
  22
  23 #include <random>
  24 #include <functional>
  25 #include <testsuite_random.h>
  26
  27 void test01()
  28 {
  29   using namespace __gnu_test;
  30
  31   std::mt19937 eng;
  32
  33   std::discrete_distribution<> dd1({ });
  34   auto bdd1 = std::bind(dd1, eng);
  35   testDiscreteDist(bdd1, [](int n) { return discrete_pdf(n, { }); } );
  36
  37   std::discrete_distribution<> dd2({ 1.0, 3.0, 2.0});
  38   auto bdd2 = std::bind(dd2, eng);
  39   testDiscreteDist(bdd2, [](int n)
  40                    { return discrete_pdf(n, { 1.0, 3.0, 2.0}); } );
  41
  42   std::discrete_distribution<> dd3({ 2.0, 2.0, 1.0, 0.0, 4.0});
  43   auto bdd3 = std::bind(dd3, eng);
  44   testDiscreteDist(bdd3, [](int n)
  45                    { return discrete_pdf(n, { 2.0, 2.0, 1.0, 0.0, 4.0}); } );
  46 }
  47
  48 int main()
  49 {
  50   test01();
  51   return 0;
  52 }