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 Iter, MoveConstructible T,
13 //           Callable<auto, const T&, Iter::reference> BinaryOperation>
14 //   requires HasAssign<T, BinaryOperation::result_type>
15 //         && CopyConstructible<BinaryOperation>
16 //   T
17 //   accumulate(Iter first, Iter last, T init, BinaryOperation binary_op);
18 
19 #include <numeric>
20 #include <functional>
21 #include <cassert>
22 
23 #include "test_iterators.h"
24 
25 template <class Iter, class T>
26 void
27 test(Iter first, Iter last, T init, T x)
28 {
29     assert(std::accumulate(first, last, init, std::multiplies<T>()) == x);
30 }
31 
32 template <class Iter>
33 void
34 test()
35 {
36     int ia[] = {1, 2, 3, 4, 5, 6};
37     unsigned sa = sizeof(ia) / sizeof(ia[0]);
38     test(Iter(ia), Iter(ia), 1, 1);
39     test(Iter(ia), Iter(ia), 10, 10);
40     test(Iter(ia), Iter(ia+1), 1, 1);
41     test(Iter(ia), Iter(ia+1), 10, 10);
42     test(Iter(ia), Iter(ia+2), 1, 2);
43     test(Iter(ia), Iter(ia+2), 10, 20);
44     test(Iter(ia), Iter(ia+sa), 1, 720);
45     test(Iter(ia), Iter(ia+sa), 10, 7200);
46 }
47 
48 int main()
49 {
50     test<input_iterator<const int*> >();
51     test<forward_iterator<const int*> >();
52     test<bidirectional_iterator<const int*> >();
53     test<random_access_iterator<const int*> >();
54     test<const int*>();
55 }
56