1 // -*- C++ -*- 2 //===-- merge.pass.cpp ----------------------------------------------------===// 3 // 4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5 // See https://llvm.org/LICENSE.txt for license information. 6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7 // 8 //===----------------------------------------------------------------------===// 9 10 // UNSUPPORTED: c++98, c++03, c++11, c++14 11 12 #include "support/pstl_test_config.h" 13 14 #include <execution> 15 #include <algorithm> 16 #include <functional> 17 18 #include "support/utils.h" 19 20 using namespace TestUtils; 21 22 struct test_merge 23 { 24 template <typename Policy, typename InputIterator1, typename InputIterator2, typename OutputIterator, 25 typename Compare> 26 void 27 operator()(Policy&& exec, InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, InputIterator2 last2, 28 OutputIterator out_first, OutputIterator out_last, Compare comp) 29 { 30 using namespace std; 31 { 32 const auto res = merge(exec, first1, last1, first2, last2, out_first, comp); 33 EXPECT_TRUE(res == out_last, "wrong return result from merge with predicate"); 34 EXPECT_TRUE(is_sorted(out_first, res, comp), "wrong result from merge with predicate"); 35 EXPECT_TRUE(includes(out_first, res, first1, last1, comp), "first sequence is not a part of result"); 36 EXPECT_TRUE(includes(out_first, res, first2, last2, comp), "second sequence is not a part of result"); 37 } 38 { 39 const auto res = merge(exec, first1, last1, first2, last2, out_first); 40 EXPECT_TRUE(res == out_last, "wrong return result from merge"); 41 EXPECT_TRUE(is_sorted(out_first, res), "wrong result from merge"); 42 } 43 } 44 45 // for reverse iterators 46 template <typename Policy, typename InputIterator1, typename InputIterator2, typename OutputIterator, 47 typename Compare> 48 void 49 operator()(Policy&& exec, std::reverse_iterator<InputIterator1> first1, std::reverse_iterator<InputIterator1> last1, 50 std::reverse_iterator<InputIterator2> first2, std::reverse_iterator<InputIterator2> last2, 51 std::reverse_iterator<OutputIterator> out_first, std::reverse_iterator<OutputIterator> out_last, Compare) 52 { 53 using namespace std; 54 typedef typename std::iterator_traits<std::reverse_iterator<InputIterator1>>::value_type T; 55 const auto res = merge(exec, first1, last1, first2, last2, out_first, std::greater<T>()); 56 57 EXPECT_TRUE(res == out_last, "wrong return result from merge with predicate"); 58 EXPECT_TRUE(is_sorted(out_first, res, std::greater<T>()), "wrong result from merge with predicate"); 59 EXPECT_TRUE(includes(out_first, res, first1, last1, std::greater<T>()), 60 "first sequence is not a part of result"); 61 EXPECT_TRUE(includes(out_first, res, first2, last2, std::greater<T>()), 62 "second sequence is not a part of result"); 63 } 64 }; 65 66 template <typename T, typename Generator1, typename Generator2> 67 void 68 test_merge_by_type(Generator1 generator1, Generator2 generator2) 69 { 70 using namespace std; 71 size_t max_size = 100000; 72 Sequence<T> in1(max_size, generator1); 73 Sequence<T> in2(max_size / 2, generator2); 74 Sequence<T> out(in1.size() + in2.size()); 75 std::sort(in1.begin(), in1.end()); 76 std::sort(in2.begin(), in2.end()); 77 78 for (size_t size = 0; size <= max_size; size = size <= 16 ? size + 1 : size_t(3.1415 * size)) 79 { 80 invoke_on_all_policies(test_merge(), in1.cbegin(), in1.cbegin() + size, in2.data(), in2.data() + size / 2, 81 out.begin(), out.begin() + 1.5 * size, std::less<T>()); 82 invoke_on_all_policies(test_merge(), in1.data(), in1.data() + size, in2.cbegin(), in2.cbegin() + size / 2, 83 out.begin(), out.begin() + 3 * size / 2, std::less<T>()); 84 } 85 } 86 87 template <typename T> 88 struct test_non_const 89 { 90 template <typename Policy, typename InputIterator, typename OutputIterator> 91 void 92 operator()(Policy&& exec, InputIterator input_iter, OutputIterator out_iter) 93 { 94 merge(exec, input_iter, input_iter, input_iter, input_iter, out_iter, non_const(std::less<T>())); 95 } 96 }; 97 98 int 99 main() 100 { 101 test_merge_by_type<int32_t>([](size_t v) { return (v % 2 == 0 ? v : -v) * 3; }, [](size_t v) { return v * 2; }); 102 test_merge_by_type<float64_t>([](size_t v) { return float64_t(v); }, [](size_t v) { return float64_t(v - 100); }); 103 104 #if !_PSTL_ICC_16_17_TEST_64_TIMEOUT 105 test_merge_by_type<Wrapper<int16_t>>([](size_t v) { return Wrapper<int16_t>(v % 100); }, 106 [](size_t v) { return Wrapper<int16_t>(v % 10); }); 107 #endif 108 109 test_algo_basic_double<int32_t>(run_for_rnd_fw<test_non_const<int32_t>>()); 110 111 std::cout << done() << std::endl; 112 return 0; 113 } 114