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//===----------------------------------------------------------------------===//
//
// 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 ForwardIterator1, class ForwardIterator2,
// class UnaryOperation>
// ForwardIterator2
// transform(ExecutionPolicy&& exec,
// ForwardIterator1 first1, ForwardIterator1 last1,
// ForwardIterator2 result, UnaryOperation op);
#include <algorithm>
#include <vector>
#include "test_macros.h"
#include "test_execution_policies.h"
#include "test_iterators.h"
// We can't test the constraint on the execution policy, because that would conflict with the binary
// transform algorithm that doesn't take an execution policy, which is not constrained at all.
template <class Iter1, class Iter2>
struct Test {
template <class Policy>
void operator()(Policy&& policy) {
// simple test
for (const int size : {0, 1, 2, 100, 350}) {
std::vector<int> a(size);
for (int i = 0; i != size; ++i)
a[i] = i + 1;
std::vector<int> out(std::size(a));
decltype(auto) ret = std::transform(
policy, Iter1(std::data(a)), Iter1(std::data(a) + std::size(a)), Iter2(std::data(out)), [](int i) {
return i + 3;
});
static_assert(std::is_same_v<decltype(ret), Iter2>);
assert(base(ret) == std::data(out) + std::size(out));
for (int i = 0; i != size; ++i)
assert(out[i] == i + 4);
}
}
};
struct TestIterators {
template <class Iter2>
void operator()() {
types::for_each(types::forward_iterator_list<int*>{},
TestIteratorWithPolicies<types::partial_instantiation<Test, Iter2>::template apply>{});
}
};
int main(int, char**) {
types::for_each(types::forward_iterator_list<int*>{}, TestIterators{});
return 0;
}
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