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
29template <class Iter1, class Iter2, class T>
30void
31test(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
37template <class Iter1, class Iter2>
38void
39test()
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
54int 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