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//   requires HasPlus<T, Iter::reference>
14//         && HasAssign<T, HasPlus<T, Iter::reference>::result_type>
15//   T
16//   accumulate(Iter first, Iter last, T init);
17
18#include <numeric>
19#include <cassert>
20
21#include "test_iterators.h"
22
23template <class Iter, class T>
24void
25test(Iter first, Iter last, T init, T x)
26{
27    assert(std::accumulate(first, last, init) == x);
28}
29
30template <class Iter>
31void
32test()
33{
34    int ia[] = {1, 2, 3, 4, 5, 6};
35    unsigned sa = sizeof(ia) / sizeof(ia[0]);
36    test(Iter(ia), Iter(ia), 0, 0);
37    test(Iter(ia), Iter(ia), 10, 10);
38    test(Iter(ia), Iter(ia+1), 0, 1);
39    test(Iter(ia), Iter(ia+1), 10, 11);
40    test(Iter(ia), Iter(ia+2), 0, 3);
41    test(Iter(ia), Iter(ia+2), 10, 13);
42    test(Iter(ia), Iter(ia+sa), 0, 21);
43    test(Iter(ia), Iter(ia+sa), 10, 31);
44}
45
46int main()
47{
48    test<input_iterator<const int*> >();
49    test<forward_iterator<const int*> >();
50    test<bidirectional_iterator<const int*> >();
51    test<random_access_iterator<const int*> >();
52    test<const int*>();
53}
54