pstl/test/std/algorithms/alg.modifying.operations/replace_copy.pass.cpp

   1 // -*- C++ -*-
   2 //===-- replace_copy.pass.cpp ---------------------------------------------===//
   3 //
   4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 // See https://llvm.org/LICENSE.txt for license information.
   6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 // UNSUPPORTED: c++03, c++11, c++14
  11
  12 // Tests for replace_copy and replace_copy_if
  13
  14 #include "support/pstl_test_config.h"
  15
  16 #include <execution>
  17 #include <algorithm>
  18
  19 #include "support/utils.h"
  20
  21 using namespace TestUtils;
  22
  23 struct test_replace_copy
  24 {
  25     template <typename Policy, typename InputIterator, typename OutputIterator, typename OutputIterator2, typename Size,
  26               typename Predicate, typename T>
  27     void
  28     operator()(Policy&& exec, InputIterator first, InputIterator last, OutputIterator out_first,
  29                OutputIterator out_last, OutputIterator2 expected_first, OutputIterator2, Size n, Predicate pred,
  30                const T& old_value, const T& new_value, T trash)
  31     {
  32         // Cleaning
  33         std::fill_n(expected_first, n, trash);
  34         std::fill_n(out_first, n, trash);
  35         // Run replace_copy
  36         auto i = std::replace_copy(first, last, expected_first, old_value, new_value);
  37         auto k = std::replace_copy(exec, first, last, out_first, old_value, new_value);
  38         EXPECT_EQ_N(expected_first, out_first, n, "wrong replace_copy effect");
  39         EXPECT_TRUE(out_last == k, "wrong return value from replace_copy");
  40
  41         // Cleaning
  42         std::fill_n(expected_first, n, trash);
  43         std::fill_n(out_first, n, trash);
  44         // Run replace_copy_if
  45         i = replace_copy_if(first, last, expected_first, pred, new_value);
  46         k = replace_copy_if(exec, first, last, out_first, pred, new_value);
  47         EXPECT_EQ_N(expected_first, out_first, n, "wrong replace_copy_if effect");
  48         EXPECT_TRUE(out_last == k, "wrong return value from replace_copy_if");
  49     }
  50 };
  51
  52 template <typename T, typename Convert, typename Predicate>
  53 void
  54 test(T trash, const T& old_value, const T& new_value, Predicate pred, Convert convert)
  55 {
  56     // Try sequences of various lengths.
  57     for (size_t n = 0; n <= 100000; n = n <= 16 ? n + 1 : size_t(3.1415 * n))
  58     {
  59         Sequence<T> in(n, [&](size_t k) -> T { return convert(n ^ k); });
  60         Sequence<T> out(n, [=](size_t) { return trash; });
  61         Sequence<T> expected(n, [=](size_t) { return trash; });
  62
  63         invoke_on_all_policies(test_replace_copy(), in.begin(), in.end(), out.begin(), out.end(), expected.begin(),
  64                                expected.end(), out.size(), pred, old_value, new_value, trash);
  65         invoke_on_all_policies(test_replace_copy(), in.cbegin(), in.cend(), out.begin(), out.end(), expected.begin(),
  66                                expected.end(), out.size(), pred, old_value, new_value, trash);
  67     }
  68 }
  69
  70 template <typename T>
  71 struct test_non_const
  72 {
  73     template <typename Policy, typename InputIterator, typename OutputInterator>
  74     void
  75     operator()(Policy&& exec, InputIterator input_iter, OutputInterator out_iter)
  76     {
  77         auto is_even = [&](float64_t v) {
  78             uint32_t i = (uint32_t)v;
  79             return i % 2 == 0;
  80         };
  81
  82         invoke_if(exec, [&]() { replace_copy_if(exec, input_iter, input_iter, out_iter, non_const(is_even), T(0)); });
  83     }
  84 };
  85
  86 int
  87 main()
  88 {
  89
  90     test<float64_t>(-666.0, 8.5, 0.33, [](const float64_t& x) { return x * x <= 1024; },
  91                     [](size_t j) { return ((j + 1) % 7 & 2) != 0 ? 8.5 : float64_t(j % 32 + j); });
  92
  93     test<int32_t>(-666, 42, 99, [](const int32_t& x) { return x != 42; },
  94                   [](size_t j) { return ((j + 1) % 5 & 2) != 0 ? 42 : -1 - int32_t(j); });
  95
  96 #if !defined(_PSTL_ICC_17_TEST_MAC_RELEASE_32_BROKEN)
  97     test<Number>(Number(42, OddTag()), Number(2001, OddTag()), Number(2017, OddTag()), IsMultiple(3, OddTag()),
  98                  [](int32_t j) { return ((j + 1) % 3 & 2) != 0 ? Number(2001, OddTag()) : Number(j, OddTag()); });
  99 #endif
 100
 101     test_algo_basic_double<int32_t>(run_for_rnd_fw<test_non_const<int32_t>>());
 102
 103     std::cout << done() << std::endl;
 104     return 0;
 105 }