1 // -*- C++ -*-
2 //===-- is_partitioned.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++98, c++03, c++11, c++14
11
12 #include "support/pstl_test_config.h"
13
14 #include <execution>
15 #include <algorithm>
16
17 #include "support/utils.h"
18
19 using namespace TestUtils;
20
21 struct test_one_policy
22 {
23 //dummy specialization by policy type, in case of broken configuration
24 #if _PSTL_ICC_17_VC141_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN || _PSTL_ICC_16_VC14_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN
25
26 template <typename Iterator1, typename Predicate>
27 void
operator ()test_one_policy28 operator()(pstl::execution::unsequenced_policy, Iterator1 begin1, Iterator1 end1, Predicate pred)
29 {
30 }
31 template <typename Iterator1, typename Predicate>
32 void
operator ()test_one_policy33 operator()(pstl::execution::parallel_unsequenced_policy, Iterator1 begin1, Iterator1 end1, Predicate pred)
34 {
35 }
36 #endif
37
38 template <typename ExecutionPolicy, typename Iterator1, typename Predicate>
39 void
operator ()test_one_policy40 operator()(ExecutionPolicy&& exec, Iterator1 begin1, Iterator1 end1, Predicate pred)
41 {
42 const bool expected = std::is_partitioned(begin1, end1, pred);
43 const bool actual = std::is_partitioned(exec, begin1, end1, pred);
44 EXPECT_TRUE(actual == expected, "wrong return result from is_partitioned");
45 }
46 };
47
48 template <typename T, typename Predicate>
49 void
test(Predicate pred)50 test(Predicate pred)
51 {
52
53 const std::size_t max_n = 1000000;
54 Sequence<T> in(max_n, [](std::size_t k) { return T(k); });
55
56 for (std::size_t n1 = 0; n1 <= max_n; n1 = n1 <= 16 ? n1 + 1 : std::size_t(3.1415 * n1))
57 {
58 invoke_on_all_policies(test_one_policy(), in.begin(), in.begin() + n1, pred);
59 std::partition(in.begin(), in.begin() + n1, pred);
60 invoke_on_all_policies(test_one_policy(), in.cbegin(), in.cbegin() + n1, pred);
61 }
62 }
63
64 template <typename T>
65 struct LocalWrapper
66 {
LocalWrapperLocalWrapper67 explicit LocalWrapper(std::size_t k) : my_val(k) {}
68
69 private:
70 T my_val;
71 };
72
73 struct test_non_const
74 {
75 template <typename Policy, typename Iterator>
76 void
operator ()test_non_const77 operator()(Policy&& exec, Iterator iter)
78 {
79 auto is_even = [&](float64_t v) {
80 uint32_t i = (uint32_t)v;
81 return i % 2 == 0;
82 };
83 invoke_if(exec, [&]() { is_partitioned(exec, iter, iter, non_const(is_even)); });
84 }
85 };
86
87 int
main()88 main()
89 {
90 test<float64_t>([](const float64_t x) { return x < 0; });
91 test<int32_t>([](const int32_t x) { return x > 1000; });
92 test<uint16_t>([](const uint16_t x) { return x % 5 < 3; });
93 #if !_PSTL_ICC_18_TEST_EARLY_EXIT_MONOTONIC_RELEASE_BROKEN && !_PSTL_ICC_19_TEST_IS_PARTITIONED_RELEASE_BROKEN
94 test<LocalWrapper<float64_t>>([](const LocalWrapper<float64_t>&) { return true; });
95 #endif
96
97 test_algo_basic_single<int32_t>(run_for_rnd_fw<test_non_const>());
98
99 std::cout << done() << std::endl;
100 return 0;
101 }
102