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++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
19using namespace TestUtils;
20
21struct test_one_policy
22{
23 //dummy specialization by policy type, in case of broken configuration
24#if defined(_PSTL_ICC_17_VC141_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN) || defined(_PSTL_ICC_16_VC14_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN)
25
26 template <typename Iterator1, typename Predicate>
27 void
28 operator()(pstl::execution::unsequenced_policy, Iterator1 begin1, Iterator1 end1, Predicate pred)
29 {
30 }
31 template <typename Iterator1, typename Predicate>
32 void
33 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
40 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
48template <typename T, typename Predicate>
49void
50test(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
64template <typename T>
65struct LocalWrapper
66{
67 explicit LocalWrapper(std::size_t k) : my_val(k) {}
68
69 private:
70 T my_val;
71};
72
73struct test_non_const
74{
75 template <typename Policy, typename Iterator>
76 void
77 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
87int
88main()
89{
90 test<float64_t>(pred: [](const float64_t x) { return x < 0; });
91 test<int32_t>(pred: [](const int32_t x) { return x > 1000; });
92 test<uint16_t>(pred: [](const uint16_t x) { return x % 5 < 3; });
93#if !defined(_PSTL_ICC_18_TEST_EARLY_EXIT_MONOTONIC_RELEASE_BROKEN) && !defined(_PSTL_ICC_19_TEST_IS_PARTITIONED_RELEASE_BROKEN)
94 test<LocalWrapper<float64_t>>(pred: [](const LocalWrapper<float64_t>&) { return true; });
95#endif
96
97 test_algo_basic_single<int32_t>(f: run_for_rnd_fw<test_non_const>());
98
99 std::cout << done() << std::endl;
100 return 0;
101}
102

source code of pstl/test/std/algorithms/alg.modifying.operations/alg.partitions/is_partitioned.pass.cpp