text: //  Copyright (c) 2015 Daniel Bourgeois
  //  Copyright (c) 2020 Hartmut Kaiser
  //
  //  SPDX-License-Identifier: BSL-1.0
  //  Distributed under the Boost Software License, Version 1.0. (See accompanying
  //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  
  #include <hpx/local/init.hpp>
  #include <hpx/modules/testing.hpp>
  #include <hpx/parallel/container_algorithms/transform_reduce.hpp>
  
  #include <cstddef>
  #include <ctime>
  #include <iostream>
  #include <string>
  #include <vector>
  
  #include "test_utils.hpp"
  
  ///////////////////////////////////////////////////////////////////////////////
  template <typename IteratorTag>
  void test_transform_reduce_binary_bad_alloc(IteratorTag)
  {
      typedef std::vector<std::size_t>::iterator base_iterator;
      typedef test::decorated_iterator<base_iterator, IteratorTag>
          decorated_iterator;
  
      std::vector<std::size_t> c = test::random_iota(10007);
      std::vector<std::size_t> d = test::random_iota(10007);
      std::size_t init = std::rand() % 1007;    //-V101
  
      bool caught_exception = false;
      try
      {
          hpx::ranges::transform_reduce(
              decorated_iterator(std::begin(c), []() { throw std::bad_alloc(); }),
              decorated_iterator(std::end(c)), std::begin(d), init);
  
          HPX_TEST(false);
      }
      catch (std::bad_alloc const&)
      {
          caught_exception = true;
      }
      catch (...)
      {
          HPX_TEST(false);
      }
      HPX_TEST(caught_exception);
  }
  
  template <typename ExPolicy, typename IteratorTag>
  void test_transform_reduce_binary_bad_alloc(ExPolicy&& policy, IteratorTag)
  {
      static_assert(hpx::is_execution_policy<ExPolicy>::value,
          "hpx::is_execution_policy<ExPolicy>::value");
  
      typedef std::vector<std::size_t>::iterator base_iterator;
      typedef test::decorated_iterator<base_iterator, IteratorTag>
          decorated_iterator;
  
      std::vector<std::size_t> c = test::random_iota(10007);
      std::vector<std::size_t> d = test::random_iota(10007);
      std::size_t init = std::rand() % 1007;    //-V101
  
      bool caught_exception = false;
      try
      {
          hpx::ranges::transform_reduce(policy,
              decorated_iterator(std::begin(c), []() { throw std::bad_alloc(); }),
              decorated_iterator(std::end(c)), std::begin(d), init);
  
          HPX_TEST(false);
      }
      catch (std::bad_alloc const&)
      {
          caught_exception = true;
      }
      catch (...)
      {
          HPX_TEST(false);
      }
      HPX_TEST(caught_exception);
  }
  
  template <typename ExPolicy, typename IteratorTag>
  void test_transform_reduce_binary_bad_alloc_async(ExPolicy&& p, IteratorTag)
  {
      typedef std::vector<std::size_t>::iterator base_iterator;
      typedef test::decorated_iterator<base_iterator, IteratorTag>
          decorated_iterator;
  
      std::vector<std::size_t> c = test::random_iota(10007);
      std::vector<std::size_t> d = test::random_iota(10007);
      std::size_t init = std::rand() % 1007;    //-V101
  
      bool returned_from_algorithm = false;
      bool caught_exception = false;
  
      try
      {
          hpx::future<std::size_t> f = hpx::ranges::transform_reduce(p,
              decorated_iterator(std::begin(c), []() { throw std::bad_alloc(); }),
              decorated_iterator(std::end(c)), std::begin(d), init);
  
          returned_from_algorithm = true;
  
          f.get();
  
          HPX_TEST(false);
      }
      catch (std::bad_alloc const&)
      {
          caught_exception = true;
      }
      catch (...)
      {
          HPX_TEST(false);
      }
  
      HPX_TEST(caught_exception);
      HPX_TEST(returned_from_algorithm);
  }
  
  template <typename IteratorTag>
  void test_transform_reduce_binary_bad_alloc()
  {
      using namespace hpx::execution;
  
      test_transform_reduce_binary_bad_alloc(IteratorTag());
  
      // If the execution policy object is of type vector_execution_policy,
      // std::terminate shall be called. therefore we do not test exceptions
      // with a vector execution policy
      test_transform_reduce_binary_bad_alloc(seq, IteratorTag());
      test_transform_reduce_binary_bad_alloc(par, IteratorTag());
  
      test_transform_reduce_binary_bad_alloc_async(seq(task), IteratorTag());
      test_transform_reduce_binary_bad_alloc_async(par(task), IteratorTag());
  }
  
  void transform_reduce_binary_bad_alloc_test()
  {
      test_transform_reduce_binary_bad_alloc<std::random_access_iterator_tag>();
      test_transform_reduce_binary_bad_alloc<std::forward_iterator_tag>();
  }
  
  ///////////////////////////////////////////////////////////////////////////////
  int hpx_main(hpx::program_options::variables_map& vm)
  {
      unsigned int seed = (unsigned int) std::time(nullptr);
      if (vm.count("seed"))
          seed = vm["seed"].as<unsigned int>();
  
      std::cout << "using seed: " << seed << std::endl;
      std::srand(seed);
  
      transform_reduce_binary_bad_alloc_test();
  
      return hpx::local::finalize();
  }
  
  int main(int argc, char* argv[])
  {
      // add command line option which controls the random number generator seed
      using namespace hpx::program_options;
      options_description desc_commandline(
          "Usage: " HPX_APPLICATION_STRING " [options]");
  
      desc_commandline.add_options()("seed,s", value<unsigned int>(),
          "the random number generator seed to use for this run");
  
      // By default this test should run on all available cores
      std::vector<std::string> const cfg = {"hpx.os_threads=all"};
  
      // Initialize and run HPX
      hpx::local::init_params init_args;
      init_args.desc_cmdline = desc_commandline;
      init_args.cfg = cfg;
  
      HPX_TEST_EQ_MSG(hpx::local::init(hpx_main, argc, argv, init_args), 0,
          "HPX main exited with non-zero status");
  
      return hpx::util::report_errors();
  }
  