1/*
2 Copyright (c) Marshall Clow 2013.
3
4 Distributed under the Boost Software License, Version 1.0. (See accompanying
5 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6
7 For more information, see http://www.boost.org
8*/
9
10#include <boost/config.hpp>
11#include <boost/algorithm/cxx17/transform_reduce.hpp>
12
13#include "iterator_test.hpp"
14
15#define BOOST_TEST_MAIN
16#include <boost/test/unit_test.hpp>
17
18namespace ba = boost::algorithm;
19
20template <class _Tp>
21struct identity
22{
23 const _Tp& operator()(const _Tp& __x) const { return __x;}
24};
25
26template <class _Tp>
27struct twice
28{
29 const _Tp operator()(const _Tp& __x) const { return 2 * __x; }
30};
31
32
33template <class Iter1, class T, class BOp, class UOp>
34void
35test_init_bop_uop(Iter1 first1, Iter1 last1, T init, BOp bOp, UOp uOp, T x)
36{
37 BOOST_CHECK(ba::transform_reduce(first1, last1, init, bOp, uOp) == x);
38}
39
40template <class Iter>
41void
42test_init_bop_uop()
43{
44 int ia[] = {1, 2, 3, 4, 5, 6};
45 unsigned sa = sizeof(ia) / sizeof(ia[0]);
46
47 test_init_bop_uop(Iter(ia), Iter(ia), 0, std::plus<int>(), identity<int>(), 0);
48 test_init_bop_uop(Iter(ia), Iter(ia), 1, std::multiplies<int>(), identity<int>(), 1);
49 test_init_bop_uop(Iter(ia), Iter(ia+1), 0, std::multiplies<int>(), identity<int>(), 0);
50 test_init_bop_uop(Iter(ia), Iter(ia+1), 2, std::plus<int>(), identity<int>(), 3);
51 test_init_bop_uop(Iter(ia), Iter(ia+2), 0, std::plus<int>(), identity<int>(), 3);
52 test_init_bop_uop(Iter(ia), Iter(ia+2), 3, std::multiplies<int>(), identity<int>(), 6);
53 test_init_bop_uop(Iter(ia), Iter(ia+sa), 4, std::multiplies<int>(), identity<int>(), 2880);
54 test_init_bop_uop(Iter(ia), Iter(ia+sa), 4, std::plus<int>(), identity<int>(), 25);
55
56 test_init_bop_uop(Iter(ia), Iter(ia), 0, std::plus<int>(), twice<int>(), 0);
57 test_init_bop_uop(Iter(ia), Iter(ia), 1, std::multiplies<int>(), twice<int>(), 1);
58 test_init_bop_uop(Iter(ia), Iter(ia+1), 0, std::multiplies<int>(), twice<int>(), 0);
59 test_init_bop_uop(Iter(ia), Iter(ia+1), 2, std::plus<int>(), twice<int>(), 4);
60 test_init_bop_uop(Iter(ia), Iter(ia+2), 0, std::plus<int>(), twice<int>(), 6);
61 test_init_bop_uop(Iter(ia), Iter(ia+2), 3, std::multiplies<int>(), twice<int>(), 24);
62 test_init_bop_uop(Iter(ia), Iter(ia+sa), 4, std::multiplies<int>(), twice<int>(), 184320); // 64 * 2880
63 test_init_bop_uop(Iter(ia), Iter(ia+sa), 4, std::plus<int>(), twice<int>(), 46);
64}
65
66void test_transform_reduce_init_bop_uop()
67{
68 BOOST_CHECK ( true );
69}
70
71template <class Iter1, class Iter2, class T, class Op1, class Op2>
72void
73test_init_bop_bop(Iter1 first1, Iter1 last1, Iter2 first2, T init, Op1 op1, Op2 op2, T x)
74{
75 BOOST_CHECK(ba::transform_reduce(first1, last1, first2, init, op1, op2) == x);
76}
77
78template <class SIter, class UIter>
79void
80test_init_bop_bop()
81{
82 int ia[] = {1, 2, 3, 4, 5, 6};
83 unsigned int ua[] = {2, 4, 6, 8, 10,12};
84 unsigned sa = sizeof(ia) / sizeof(ia[0]);
85 BOOST_CHECK(sa == sizeof(ua) / sizeof(ua[0])); // just to be sure
86
87 test_init_bop_bop(SIter(ia), SIter(ia), UIter(ua), 0, std::plus<int>(), std::multiplies<int>(), 0);
88 test_init_bop_bop(UIter(ua), UIter(ua), SIter(ia), 1, std::multiplies<int>(), std::plus<int>(), 1);
89 test_init_bop_bop(SIter(ia), SIter(ia+1), UIter(ua), 0, std::multiplies<int>(), std::plus<int>(), 0);
90 test_init_bop_bop(UIter(ua), UIter(ua+1), SIter(ia), 2, std::plus<int>(), std::multiplies<int>(), 4);
91 test_init_bop_bop(SIter(ia), SIter(ia+2), UIter(ua), 0, std::plus<int>(), std::multiplies<int>(), 10);
92 test_init_bop_bop(UIter(ua), UIter(ua+2), SIter(ia), 3, std::multiplies<int>(), std::plus<int>(), 54);
93 test_init_bop_bop(SIter(ia), SIter(ia+sa), UIter(ua), 4, std::multiplies<int>(), std::plus<int>(), 2099520);
94 test_init_bop_bop(UIter(ua), UIter(ua+sa), SIter(ia), 4, std::plus<int>(), std::multiplies<int>(), 186);
95}
96
97void test_transform_reduce_init_bop_bop()
98{
99// All the iterator categories
100 test_init_bop_bop<input_iterator <const int*>, input_iterator <const unsigned int*> >();
101 test_init_bop_bop<input_iterator <const int*>, forward_iterator <const unsigned int*> >();
102 test_init_bop_bop<input_iterator <const int*>, bidirectional_iterator<const unsigned int*> >();
103 test_init_bop_bop<input_iterator <const int*>, random_access_iterator<const unsigned int*> >();
104
105 test_init_bop_bop<forward_iterator <const int*>, input_iterator <const unsigned int*> >();
106 test_init_bop_bop<forward_iterator <const int*>, forward_iterator <const unsigned int*> >();
107 test_init_bop_bop<forward_iterator <const int*>, bidirectional_iterator<const unsigned int*> >();
108 test_init_bop_bop<forward_iterator <const int*>, random_access_iterator<const unsigned int*> >();
109
110 test_init_bop_bop<bidirectional_iterator<const int*>, input_iterator <const unsigned int*> >();
111 test_init_bop_bop<bidirectional_iterator<const int*>, forward_iterator <const unsigned int*> >();
112 test_init_bop_bop<bidirectional_iterator<const int*>, bidirectional_iterator<const unsigned int*> >();
113 test_init_bop_bop<bidirectional_iterator<const int*>, random_access_iterator<const unsigned int*> >();
114
115 test_init_bop_bop<random_access_iterator<const int*>, input_iterator <const unsigned int*> >();
116 test_init_bop_bop<random_access_iterator<const int*>, forward_iterator <const unsigned int*> >();
117 test_init_bop_bop<random_access_iterator<const int*>, bidirectional_iterator<const unsigned int*> >();
118 test_init_bop_bop<random_access_iterator<const int*>, random_access_iterator<const unsigned int*> >();
119
120// just plain pointers (const vs. non-const, too)
121 test_init_bop_bop<const int*, const unsigned int *>();
122 test_init_bop_bop<const int*, unsigned int *>();
123 test_init_bop_bop< int*, const unsigned int *>();
124 test_init_bop_bop< int*, unsigned int *>();
125}
126
127template <class Iter1, class Iter2, class T>
128void
129test_init(Iter1 first1, Iter1 last1, Iter2 first2, T init, T x)
130{
131 BOOST_CHECK(ba::transform_reduce(first1, last1, first2, init) == x);
132}
133
134template <class SIter, class UIter>
135void
136test_init()
137{
138 int ia[] = {1, 2, 3, 4, 5, 6};
139 unsigned int ua[] = {2, 4, 6, 8, 10,12};
140 unsigned sa = sizeof(ia) / sizeof(ia[0]);
141 BOOST_CHECK(sa == sizeof(ua) / sizeof(ua[0])); // just to be sure
142
143 test_init(SIter(ia), SIter(ia), UIter(ua), 0, 0);
144 test_init(UIter(ua), UIter(ua), SIter(ia), 1, 1);
145 test_init(SIter(ia), SIter(ia+1), UIter(ua), 0, 2);
146 test_init(UIter(ua), UIter(ua+1), SIter(ia), 2, 4);
147 test_init(SIter(ia), SIter(ia+2), UIter(ua), 0, 10);
148 test_init(UIter(ua), UIter(ua+2), SIter(ia), 3, 13);
149 test_init(SIter(ia), SIter(ia+sa), UIter(ua), 0, 182);
150 test_init(UIter(ua), UIter(ua+sa), SIter(ia), 4, 186);
151}
152
153void test_transform_reduce_init()
154{
155// All the iterator categories
156 test_init<input_iterator <const int*>, input_iterator <const unsigned int*> >();
157 test_init<input_iterator <const int*>, forward_iterator <const unsigned int*> >();
158 test_init<input_iterator <const int*>, bidirectional_iterator<const unsigned int*> >();
159 test_init<input_iterator <const int*>, random_access_iterator<const unsigned int*> >();
160
161 test_init<forward_iterator <const int*>, input_iterator <const unsigned int*> >();
162 test_init<forward_iterator <const int*>, forward_iterator <const unsigned int*> >();
163 test_init<forward_iterator <const int*>, bidirectional_iterator<const unsigned int*> >();
164 test_init<forward_iterator <const int*>, random_access_iterator<const unsigned int*> >();
165
166 test_init<bidirectional_iterator<const int*>, input_iterator <const unsigned int*> >();
167 test_init<bidirectional_iterator<const int*>, forward_iterator <const unsigned int*> >();
168 test_init<bidirectional_iterator<const int*>, bidirectional_iterator<const unsigned int*> >();
169 test_init<bidirectional_iterator<const int*>, random_access_iterator<const unsigned int*> >();
170
171 test_init<random_access_iterator<const int*>, input_iterator <const unsigned int*> >();
172 test_init<random_access_iterator<const int*>, forward_iterator <const unsigned int*> >();
173 test_init<random_access_iterator<const int*>, bidirectional_iterator<const unsigned int*> >();
174 test_init<random_access_iterator<const int*>, random_access_iterator<const unsigned int*> >();
175
176// just plain pointers (const vs. non-const, too)
177 test_init<const int*, const unsigned int *>();
178 test_init<const int*, unsigned int *>();
179 test_init< int*, const unsigned int *>();
180 test_init< int*, unsigned int *>();
181}
182
183BOOST_AUTO_TEST_CASE( test_main )
184{
185 test_transform_reduce_init();
186 test_transform_reduce_init_bop_uop();
187 test_transform_reduce_init_bop_bop();
188}
189

source code of boost/libs/algorithm/test/transform_reduce_test.cpp