1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14
// UNSUPPORTED: libcpp-has-no-incomplete-pstl
// <algorithm>
// template<class ExecutionPolicy, class ForwardIterator, class Predicate>
// ForwardIterator find_if(ExecutionPolicy&& exec, ForwardIterator first, ForwardIterator last,
// Predicate pred);
#include <algorithm>
#include <cassert>
#include <vector>
#include "test_macros.h"
#include "test_execution_policies.h"
#include "test_iterators.h"
EXECUTION_POLICY_SFINAE_TEST(find_if);
static_assert(sfinae_test_find_if<int, int*, int*, bool (*)(int)>);
static_assert(!sfinae_test_find_if<std::execution::parallel_policy, int*, int*, int>);
template <class Iter>
struct Test {
template <class Policy>
void operator()(Policy&& policy) {
int a[] = {1, 2, 3, 4, 5, 6, 7, 8};
// simple test
assert(base(std::find_if(policy, Iter(std::begin(a)), Iter(std::end(a)), [](int i) { return i == 3; })) == a + 2);
// check that last is returned if no element matches
assert(base(std::find_if(policy, Iter(std::begin(a)), Iter(std::end(a)), [](int i) { return i == 0; })) ==
std::end(a));
// check that the first element is returned
assert(base(std::find_if(policy, Iter(std::begin(a)), Iter(std::end(a)), [](int i) { return i == 1; })) ==
std::begin(a));
// check that an empty range works
assert(base(std::find_if(policy, Iter(std::begin(a)), Iter(std::begin(a)), [](int i) { return i == 1; })) ==
std::begin(a));
// check that a one-element range works
assert(base(std::find_if(policy, Iter(std::begin(a)), Iter(std::begin(a) + 1), [](int i) { return i == 1; })) ==
std::begin(a));
// check that a two-element range works
assert(base(std::find_if(policy, Iter(std::begin(a)), Iter(std::begin(a) + 2), [](int i) { return i == 2; })) ==
std::begin(a) + 1);
// check that a large number of elements works
std::vector<int> vec(200, 4);
vec[176] = 5;
assert(base(std::find_if(policy, Iter(std::data(vec)), Iter(std::data(vec) + std::size(vec)), [](int i) {
return i == 5;
})) == std::data(vec) + 176);
}
};
int main(int, char**) {
types::for_each(types::forward_iterator_list<int*>{}, TestIteratorWithPolicies<Test>{});
#ifndef TEST_HAS_NO_EXCEPTIONS
std::set_terminate(terminate_successful);
int a[] = {1, 2};
try {
(void)std::find_if(std::execution::par, std::begin(a), std::end(a), [](int) -> bool { throw int{}; });
} catch (int) {
assert(false);
}
#endif
return 0;
}
|
