1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// UNSUPPORTED: c++03, c++11, c++14
10
11// UNSUPPORTED: libcpp-has-no-incomplete-pstl
12
13// <algorithm>
14
15// template<class ExecutionPolicy, class ForwardIterator1, class ForwardIterator2,
16// class ForwardIterator, class BinaryOperation>
17// ForwardIterator
18// transform(ExecutionPolicy&& exec,
19// ForwardIterator1 first1, ForwardIterator1 last1,
20// ForwardIterator2 first2, ForwardIterator result,
21// BinaryOperation binary_op);
22
23#include <algorithm>
24#include <vector>
25
26#include "test_macros.h"
27#include "test_execution_policies.h"
28#include "test_iterators.h"
29
30EXECUTION_POLICY_SFINAE_TEST(transform);
31
32static_assert(sfinae_test_transform<int, int*, int*, int*, int*, bool (*)(int)>);
33static_assert(!sfinae_test_transform<std::execution::parallel_policy, int*, int*, int*, int*, int (*)(int, int)>);
34
35template <class Iter1, class Iter2, class Iter3>
36struct Test {
37 template <class Policy>
38 void operator()(Policy&& policy) {
39 // simple test
40 for (const int size : {0, 1, 2, 100, 350}) {
41 std::vector<int> a(size);
42 std::vector<int> b(size);
43 for (int i = 0; i != size; ++i) {
44 a[i] = i + 1;
45 b[i] = i - 3;
46 }
47
48 std::vector<int> out(std::size(cont: a));
49 decltype(auto) ret = std::transform(
50 policy,
51 Iter1(std::data(cont&: a)),
52 Iter1(std::data(cont&: a) + std::size(cont: a)),
53 Iter2(std::data(cont&: b)),
54 Iter3(std::data(cont&: out)),
55 [](int i, int j) { return i + j + 3; });
56 static_assert(std::is_same_v<decltype(ret), Iter3>);
57 assert(base(ret) == std::data(cont&: out) + std::size(cont: out));
58 for (int i = 0; i != size; ++i) {
59 assert(out[i] == i * 2 + 1);
60 }
61 }
62 }
63};
64
65int main(int, char**) {
66 types::for_each(
67 types::forward_iterator_list<int*>{}, types::apply_type_identity{[](auto v) {
68 using Iter3 = typename decltype(v)::type;
69 types::for_each(
70 types::forward_iterator_list<int*>{}, types::apply_type_identity{[](auto v2) {
71 using Iter2 = typename decltype(v2)::type;
72 types::for_each(
73 types::forward_iterator_list<int*>{},
74 TestIteratorWithPolicies<types::partial_instantiation<Test, Iter2, Iter3>::template apply>{});
75 }});
76 }});
77
78 return 0;
79}
80

source code of libcxx/test/std/algorithms/alg.modifying.operations/alg.transform/pstl.transform.binary.pass.cpp