1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <numeric>
11 
12 // template <InputIterator Iter1, InputIterator Iter2, MoveConstructible T,
13 //           class BinaryOperation1,
14 //           Callable<auto, Iter1::reference, Iter2::reference> BinaryOperation2>
15 //   requires Callable<BinaryOperation1, const T&, BinaryOperation2::result_type>
16 //         && HasAssign<T, BinaryOperation1::result_type>
17 //         && CopyConstructible<BinaryOperation1>
18 //         && CopyConstructible<BinaryOperation2>
19 //   T
20 //   inner_product(Iter1 first1, Iter1 last1, Iter2 first2,
21 //                 T init, BinaryOperation1 binary_op1, BinaryOperation2 binary_op2);
22 
23 #include <numeric>
24 #include <functional>
25 #include <cassert>
26 
27 #include "test_iterators.h"
28 
29 template <class Iter1, class Iter2, class T>
30 void
31 test(Iter1 first1, Iter1 last1, Iter2 first2, T init, T x)
32 {
33     assert(std::inner_product(first1, last1, first2, init,
34            std::multiplies<int>(), std::plus<int>()) == x);
35 }
36 
37 template <class Iter1, class Iter2>
38 void
39 test()
40 {
41     int a[] = {1, 2, 3, 4, 5, 6};
42     int b[] = {6, 5, 4, 3, 2, 1};
43     unsigned sa = sizeof(a) / sizeof(a[0]);
44     test(Iter1(a), Iter1(a), Iter2(b), 1, 1);
45     test(Iter1(a), Iter1(a), Iter2(b), 10, 10);
46     test(Iter1(a), Iter1(a+1), Iter2(b), 1, 7);
47     test(Iter1(a), Iter1(a+1), Iter2(b), 10, 70);
48     test(Iter1(a), Iter1(a+2), Iter2(b), 1, 49);
49     test(Iter1(a), Iter1(a+2), Iter2(b), 10, 490);
50     test(Iter1(a), Iter1(a+sa), Iter2(b), 1, 117649);
51     test(Iter1(a), Iter1(a+sa), Iter2(b), 10, 1176490);
52 }
53 
54 int main()
55 {
56     test<input_iterator<const int*>, input_iterator<const int*> >();
57     test<input_iterator<const int*>, forward_iterator<const int*> >();
58     test<input_iterator<const int*>, bidirectional_iterator<const int*> >();
59     test<input_iterator<const int*>, random_access_iterator<const int*> >();
60     test<input_iterator<const int*>, const int*>();
61 
62     test<forward_iterator<const int*>, input_iterator<const int*> >();
63     test<forward_iterator<const int*>, forward_iterator<const int*> >();
64     test<forward_iterator<const int*>, bidirectional_iterator<const int*> >();
65     test<forward_iterator<const int*>, random_access_iterator<const int*> >();
66     test<forward_iterator<const int*>, const int*>();
67 
68     test<bidirectional_iterator<const int*>, input_iterator<const int*> >();
69     test<bidirectional_iterator<const int*>, forward_iterator<const int*> >();
70     test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*> >();
71     test<bidirectional_iterator<const int*>, random_access_iterator<const int*> >();
72     test<bidirectional_iterator<const int*>, const int*>();
73 
74     test<random_access_iterator<const int*>, input_iterator<const int*> >();
75     test<random_access_iterator<const int*>, forward_iterator<const int*> >();
76     test<random_access_iterator<const int*>, bidirectional_iterator<const int*> >();
77     test<random_access_iterator<const int*>, random_access_iterator<const int*> >();
78     test<random_access_iterator<const int*>, const int*>();
79 
80     test<const int*, input_iterator<const int*> >();
81     test<const int*, forward_iterator<const int*> >();
82     test<const int*, bidirectional_iterator<const int*> >();
83     test<const int*, random_access_iterator<const int*> >();
84     test<const int*, const int*>();
85 }
86