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// <numeric>
14
15// template<class ExecutionPolicy,
16// class ForwardIterator, class T,
17// class BinaryOperation, class UnaryOperation>
18// T transform_reduce(ExecutionPolicy&& exec,
19// ForwardIterator first, ForwardIterator last,
20// T init, BinaryOperation binary_op, UnaryOperation unary_op);
21
22#include <numeric>
23#include <string>
24#include <vector>
25
26#include "MoveOnly.h"
27#include "test_execution_policies.h"
28#include "test_iterators.h"
29#include "test_macros.h"
30
31template <class Iter1, class ValueT>
32struct Test {
33 template <class Policy>
34 void operator()(Policy&& policy) {
35 for (const auto& pair : {std::pair{0, 34}, {1, 35}, {2, 37}, {100, 5084}, {350, 61459}}) {
36 auto [size, expected] = pair;
37 std::vector<int> a(size);
38 for (int i = 0; i != size; ++i)
39 a[i] = i;
40
41 decltype(auto) ret = std::transform_reduce(
42 policy,
43 Iter1(std::data(cont&: a)),
44 Iter1(std::data(cont&: a) + std::size(cont: a)),
45 ValueT(34),
46 [check = std::string("Banane")](ValueT i, ValueT j) {
47 assert(check == "Banane"); // ensure that no double-moves happen
48 return i + j;
49 },
50 [check = std::string("Banane")](ValueT i) {
51 assert(check == "Banane"); // ensure that no double-moves happen
52 return i + 1;
53 });
54 static_assert(std::is_same_v<decltype(ret), ValueT>);
55 assert(ret == expected);
56 }
57 }
58};
59
60int main(int, char**) {
61 types::for_each(types::forward_iterator_list<int*>{}, types::apply_type_identity{[](auto v) {
62 using Iter2 = typename decltype(v)::type;
63 types::for_each(
64 types::type_list<int, MoveOnly>{},
65 TestIteratorWithPolicies<types::partial_instantiation<Test, Iter2>::template apply>{});
66 }});
67
68 return 0;
69}
70

source code of libcxx/test/std/numerics/numeric.ops/transform.reduce/pstl.transform_reduce.unary.pass.cpp