1// -*- C++ -*-
2//===-- reverse.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 <iterator>
15#include <execution>
16#include <algorithm>
17
18#include "support/utils.h"
19
20using namespace TestUtils;
21
22struct test_one_policy
23{
24#if defined(_PSTL_ICC_18_VC141_TEST_SIMD_LAMBDA_RELEASE_BROKEN) || defined(_PSTL_ICC_17_VC141_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN) || \
25 defined(_PSTL_ICC_16_VC14_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN) // dummy specialization by policy type, in case of broken configuration
26 template <typename Iterator1, typename Iterator2>
27 typename std::enable_if<is_same_iterator_category<Iterator1, std::random_access_iterator_tag>::value, void>::type
28 operator()(pstl::execution::unsequenced_policy, Iterator1 data_b, Iterator1 data_e, Iterator2 actual_b,
29 Iterator2 actual_e)
30 {
31 }
32 template <typename Iterator1, typename Iterator2>
33 typename std::enable_if<is_same_iterator_category<Iterator1, std::random_access_iterator_tag>::value, void>::type
34 operator()(pstl::execution::parallel_unsequenced_policy, Iterator1 data_b, Iterator1 data_e, Iterator2 actual_b,
35 Iterator2 actual_e)
36 {
37 }
38#endif
39
40 template <typename ExecutionPolicy, typename Iterator1, typename Iterator2>
41 typename std::enable_if<!is_same_iterator_category<Iterator1, std::forward_iterator_tag>::value>::type
42 operator()(ExecutionPolicy&& exec, Iterator1 data_b, Iterator1 data_e, Iterator2 actual_b, Iterator2 actual_e)
43 {
44 using namespace std;
45
46 copy(data_b, data_e, actual_b);
47
48 reverse(exec, actual_b, actual_e);
49
50 bool check = equal(data_b, data_e, reverse_iterator<Iterator2>(actual_e));
51
52 EXPECT_TRUE(check, "wrong result of reverse");
53 }
54
55 template <typename ExecutionPolicy, typename Iterator1, typename Iterator2>
56 typename std::enable_if<is_same_iterator_category<Iterator1, std::forward_iterator_tag>::value>::type
57 operator()(ExecutionPolicy&&, Iterator1, Iterator1, Iterator2, Iterator2)
58 {
59 }
60};
61
62template <typename T>
63void
64test()
65{
66 const std::size_t max_len = 100000;
67
68 Sequence<T> actual(max_len);
69
70 Sequence<T> data(max_len, [](std::size_t i) { return T(i); });
71
72 for (std::size_t len = 0; len < max_len; len = len <= 16 ? len + 1 : std::size_t(3.1415 * len))
73 {
74 invoke_on_all_policies(test_one_policy(), data.begin(), data.begin() + len, actual.begin(),
75 actual.begin() + len);
76 }
77}
78
79template <typename T>
80struct wrapper
81{
82 T t;
83 wrapper() {}
84 explicit wrapper(T t_) : t(t_) {}
85 bool
86 operator==(const wrapper<T>& a) const
87 {
88 return t == a.t;
89 }
90};
91
92int
93main()
94{
95 test<int32_t>();
96 test<uint16_t>();
97 test<float64_t>();
98#if !defined(_PSTL_ICC_17_TEST_MAC_RELEASE_32_BROKEN)
99 test<wrapper<float64_t>>();
100#endif
101
102 std::cout << done() << std::endl;
103 return 0;
104}
105

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