1// -*- C++ -*-
2//===-- find_first_of.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#if defined(_PSTL_ICC_17_VC141_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN) || \
24 defined(_PSTL_ICC_16_VC14_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN) //dummy specialization by policy type, in case of broken configuration
25 template <typename Iterator1, typename Iterator2, typename Predicate>
26 void
27 operator()(pstl::execution::unsequenced_policy, Iterator1 b, Iterator1 e, Iterator2 bsub, Iterator2 esub,
28 Predicate pred)
29 {
30 }
31 template <typename Iterator1, typename Iterator2, typename Predicate>
32 void
33 operator()(pstl::execution::parallel_unsequenced_policy, Iterator1 b, Iterator1 e, Iterator2 bsub, Iterator2 esub,
34 Predicate pred)
35 {
36 }
37#endif
38
39 template <typename ExecutionPolicy, typename Iterator1, typename Iterator2, typename Predicate>
40 void
41 operator()(ExecutionPolicy&& exec, Iterator1 b, Iterator1 e, Iterator2 bsub, Iterator2 esub, Predicate pred)
42 {
43 using namespace std;
44 Iterator1 expected = find_first_of(b, e, bsub, esub, pred);
45 Iterator1 actual = find_first_of(exec, b, e, bsub, esub, pred);
46 EXPECT_TRUE(actual == expected, "wrong return result from find_first_of with a predicate");
47
48 expected = find_first_of(b, e, bsub, esub);
49 actual = find_first_of(exec, b, e, bsub, esub);
50 EXPECT_TRUE(actual == expected, "wrong return result from find_first_of");
51 }
52};
53
54template <typename T, typename Predicate>
55void
56test(Predicate pred)
57{
58
59 const std::size_t max_n1 = 1000;
60 const std::size_t max_n2 = (max_n1 * 10) / 8;
61 Sequence<T> in1(max_n1, [](std::size_t) { return T(1); });
62 Sequence<T> in2(max_n2, [](std::size_t) { return T(0); });
63 for (std::size_t n1 = 0; n1 <= max_n1; n1 = n1 <= 16 ? n1 + 1 : size_t(3.1415 * n1))
64 {
65 std::size_t sub_n[] = {0, 1, n1 / 3, n1, (n1 * 10) / 8};
66 for (const auto n2 : sub_n)
67 {
68 invoke_on_all_policies(test_one_policy(), in1.begin(), in1.begin() + n1, in2.data(), in2.data() + n2, pred);
69
70 in2[n2 / 2] = T(1);
71 invoke_on_all_policies(test_one_policy(), in1.cbegin(), in1.cbegin() + n1, in2.data(), in2.data() + n2,
72 pred);
73
74 if (n2 >= 3)
75 {
76 in2[2 * n2 / 3] = T(1);
77 invoke_on_all_policies(test_one_policy(), in1.cbegin(), in1.cbegin() + n1, in2.begin(),
78 in2.begin() + n2, pred);
79 in2[2 * n2 / 3] = T(0);
80 }
81 in2[n2 / 2] = T(0);
82 }
83 }
84 invoke_on_all_policies(test_one_policy(), in1.begin(), in1.begin() + max_n1 / 10, in1.data(),
85 in1.data() + max_n1 / 10, pred);
86}
87
88template <typename T>
89struct test_non_const
90{
91 template <typename Policy, typename FirstIterator, typename SecondInterator>
92 void
93 operator()(Policy&& exec, FirstIterator first_iter, SecondInterator second_iter)
94 {
95 invoke_if(exec, [&]() {
96 find_first_of(exec, first_iter, first_iter, second_iter, second_iter, non_const(std::equal_to<T>()));
97 });
98 }
99};
100
101int
102main()
103{
104 test<int32_t>(pred: std::equal_to<int32_t>());
105 test<uint16_t>(pred: std::not_equal_to<uint16_t>());
106 test<float64_t>(pred: [](const float64_t x, const float64_t y) { return x * x == y * y; });
107
108 test_algo_basic_double<int32_t>(f: run_for_rnd_fw<test_non_const<int32_t>>());
109
110 std::cout << done() << std::endl;
111 return 0;
112}
113

source code of pstl/test/std/algorithms/alg.nonmodifying/find_first_of.pass.cpp