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
test(Iter1 first1,Iter1 last1,Iter2 first2,T init,T x)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
test()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
main()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