forked from OSchip/llvm-project
95 lines
3.4 KiB
C++
95 lines
3.4 KiB
C++
// -*- C++ -*-
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//===-- remove_copy.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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#include "support/pstl_test_config.h"
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#ifdef PSTL_STANDALONE_TESTS
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#include "pstl/execution"
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#include "pstl/algorithm"
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#else
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#include <execution>
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#include <algorithm>
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#endif // PSTL_STANDALONE_TESTS
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#include "support/utils.h"
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using namespace TestUtils;
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struct run_remove_copy
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{
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template <typename Policy, typename InputIterator, typename OutputIterator, typename OutputIterator2, typename Size,
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typename T>
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void
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operator()(Policy&& exec, InputIterator first, InputIterator last, OutputIterator out_first,
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OutputIterator out_last, OutputIterator2 expected_first, OutputIterator2 expected_last, Size n,
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const T& value, T trash)
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{
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// Cleaning
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std::fill_n(expected_first, n, trash);
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std::fill_n(out_first, n, trash);
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// Run copy_if
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auto i = remove_copy(first, last, expected_first, value);
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auto k = remove_copy(exec, first, last, out_first, value);
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EXPECT_EQ_N(expected_first, out_first, n, "wrong remove_copy effect");
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for (size_t j = 0; j < GuardSize; ++j)
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{
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++k;
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}
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EXPECT_TRUE(out_last == k, "wrong return value from remove_copy");
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}
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};
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template <typename T, typename Convert>
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void
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test(T trash, const T& value, Convert convert, bool check_weakness = true)
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{
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// Try sequences of various lengths.
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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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// count is number of output elements, plus a handful
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// more for sake of detecting buffer overruns.
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size_t count = GuardSize;
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Sequence<T> in(n, [&](size_t k) -> T {
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T x = convert(n ^ k);
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count += !(x == value) ? 1 : 0;
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return x;
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});
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using namespace std;
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Sequence<T> out(count, [=](size_t) { return trash; });
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Sequence<T> expected(count, [=](size_t) { return trash; });
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if (check_weakness)
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{
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auto expected_result = remove_copy(in.cfbegin(), in.cfend(), expected.begin(), value);
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size_t m = expected_result - expected.begin();
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EXPECT_TRUE(n / 4 <= m && m <= 3 * (n + 1) / 4, "weak test for remove_copy");
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}
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invoke_on_all_policies(run_remove_copy(), in.begin(), in.end(), out.begin(), out.end(), expected.begin(),
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expected.end(), count, value, trash);
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invoke_on_all_policies(run_remove_copy(), in.cbegin(), in.cend(), out.begin(), out.end(), expected.begin(),
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expected.end(), count, value, trash);
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}
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}
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int32_t
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main()
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{
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test<float64_t>(-666.0, 8.5, [](size_t j) { return ((j + 1) % 7 & 2) != 0 ? 8.5 : float64_t(j % 32 + j); });
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test<int32_t>(-666, 42, [](size_t j) { return ((j + 1) % 5 & 2) != 0 ? 42 : -1 - int32_t(j); });
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test<Number>(Number(42, OddTag()), Number(2001, OddTag()),
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[](int32_t j) { return ((j + 1) % 3 & 2) != 0 ? Number(2001, OddTag()) : Number(j, OddTag()); });
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std::cout << done() << std::endl;
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return 0;
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}
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