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// -*- C++ -*-
//===-- reverse_copy.pass.cpp ---------------------------------------------===//
//
// 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
#include "support/pstl_test_config.h"
#include <iterator>
#include <execution>
#include <algorithm>
#include "support/utils.h"
using namespace TestUtils;
template <typename T>
struct wrapper
{
T t;
wrapper() {}
explicit wrapper(T t_) : t(t_) {}
wrapper&
operator=(const T& t_)
{
t = t_;
return *this;
}
bool
operator==(const wrapper& t_) const
{
return t == t_.t;
}
};
template <typename T1, typename T2>
bool
eq(const wrapper<T1>& a, const wrapper<T2>& b)
{
return a.t == b.t;
}
template <typename T1, typename T2>
bool
eq(const T1& a, const T2& b)
{
return a == b;
}
// we need to save state here, because we need to test with different types of iterators
// due to the caller invoke_on_all_policies does forcing modification passed iterator type to cover additional usage cases.
template <typename Iterator>
struct test_one_policy
{
Iterator data_b;
Iterator data_e;
test_one_policy(Iterator b, Iterator e) : data_b(b), data_e(e) {}
#if defined(_PSTL_ICC_17_VC141_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN) || \
defined(_PSTL_ICC_16_VC14_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN) // dummy specialization by policy type, in case of broken configuration
template <typename Iterator1>
typename std::enable_if<is_same_iterator_category<Iterator1, std::random_access_iterator_tag>::value, void>::type
operator()(pstl::execution::unsequenced_policy, Iterator1 actual_b, Iterator1 actual_e)
{
}
template <typename Iterator1>
typename std::enable_if<is_same_iterator_category<Iterator1, std::random_access_iterator_tag>::value, void>::type
operator()(pstl::execution::parallel_unsequenced_policy, Iterator1 actual_b, Iterator1 actual_e)
{
}
#endif
template <typename ExecutionPolicy, typename Iterator1>
void
operator()(ExecutionPolicy&& exec, Iterator1 actual_b, Iterator1 actual_e)
{
using namespace std;
using T = typename iterator_traits<Iterator1>::value_type;
fill(actual_b, actual_e, T(-123));
Iterator1 actual_return = reverse_copy(exec, data_b, data_e, actual_b);
EXPECT_TRUE(actual_return == actual_e, "wrong result of reverse_copy");
const auto n = std::distance(data_b, data_e);
Sequence<T> res(n);
std::copy(std::reverse_iterator<Iterator>(data_e), std::reverse_iterator<Iterator>(data_b), res.begin());
EXPECT_EQ_N(res.begin(), actual_b, n, "wrong effect of reverse_copy");
}
};
template <typename T1, typename T2>
void
test()
{
typedef typename Sequence<T1>::iterator iterator_type;
typedef typename Sequence<T1>::const_bidirectional_iterator cbi_iterator_type;
const std::size_t max_len = 100000;
Sequence<T2> actual(max_len);
Sequence<T1> data(max_len, [](std::size_t i) { return T1(i); });
for (std::size_t len = 0; len < max_len; len = len <= 16 ? len + 1 : std::size_t(3.1415 * len))
{
invoke_on_all_policies(test_one_policy<iterator_type>(data.begin(), data.begin() + len), actual.begin(),
actual.begin() + len);
invoke_on_all_policies(test_one_policy<cbi_iterator_type>(data.cbibegin(), std::next(data.cbibegin(), len)),
actual.begin(), actual.begin() + len);
}
}
int
main()
{
// clang-3.8 fails to correctly auto vectorize the loop in some cases of different types of container's elements,
// for example: int32_t and int8_t. This issue isn't detected for clang-3.9 and newer versions.
test<int16_t, int8_t>();
test<uint16_t, float32_t>();
test<float64_t, int64_t>();
test<wrapper<float64_t>, wrapper<float64_t>>();
std::cout << done() << std::endl;
return 0;
}
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