forked from OSchip/llvm-project
103 lines
2.5 KiB
C++
103 lines
2.5 KiB
C++
// -*- C++ -*-
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//===-- for_each.pass.cpp -------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03, c++11, c++14
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#include "support/pstl_test_config.h"
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#include <execution>
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#include <algorithm>
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#include "support/utils.h"
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using namespace TestUtils;
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template <typename Type>
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struct Gen
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{
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Type
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operator()(std::size_t k)
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{
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return Type(k % 5 != 1 ? 3 * k - 7 : 0);
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};
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};
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template <typename T>
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struct Flip
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{
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int32_t val;
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Flip(int32_t y) : val(y) {}
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T
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operator()(T& x) const
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{
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return x = val - x;
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}
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};
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struct test_one_policy
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{
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template <typename Policy, typename Iterator, typename Size>
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void
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operator()(Policy&& exec, Iterator first, Iterator last, Iterator expected_first, Iterator expected_last, Size n)
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{
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typedef typename std::iterator_traits<Iterator>::value_type T;
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// Try for_each
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std::for_each(expected_first, expected_last, Flip<T>(1));
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for_each(exec, first, last, Flip<T>(1));
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EXPECT_EQ_N(expected_first, first, n, "wrong effect from for_each");
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// Try for_each_n
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std::for_each_n(std::execution::seq, expected_first, n, Flip<T>(1));
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for_each_n(exec, first, n, Flip<T>(1));
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EXPECT_EQ_N(expected_first, first, n, "wrong effect from for_each_n");
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}
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};
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template <typename T>
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void
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test()
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{
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for (size_t n = 0; n <= 100000; n = n <= 16 ? n + 1 : size_t(3.1415 * n))
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{
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Sequence<T> inout(n, Gen<T>());
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Sequence<T> expected(n, Gen<T>());
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invoke_on_all_policies(test_one_policy(), inout.begin(), inout.end(), expected.begin(), expected.end(),
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inout.size());
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}
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}
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struct test_non_const
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{
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template <typename Policy, typename Iterator>
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void
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operator()(Policy&& exec, Iterator iter)
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{
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invoke_if(exec, [&]() {
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auto f = [](typename std::iterator_traits<Iterator>::reference x) { x = x + 1; };
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for_each(exec, iter, iter, non_const(f));
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for_each_n(exec, iter, 0, non_const(f));
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});
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}
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};
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int
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main()
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{
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test<int32_t>();
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test<uint16_t>();
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test<float64_t>();
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test_algo_basic_single<int32_t>(run_for_rnd_fw<test_non_const>());
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std::cout << done() << std::endl;
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return 0;
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}
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