1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // <numeric>
10 
11 // template <InputIterator Iter, MoveConstructible T>
12 //   requires HasPlus<T, Iter::reference>
13 //         && HasAssign<T, HasPlus<T, Iter::reference>::result_type>
14 //   T
15 //   accumulate(Iter first, Iter last, T init);
16 
17 #include <numeric>
18 #include <cassert>
19 
20 #include "test_iterators.h"
21 
22 template <class Iter, class T>
23 void
24 test(Iter first, Iter last, T init, T x)
25 {
26     assert(std::accumulate(first, last, init) == x);
27 }
28 
29 template <class Iter>
30 void
31 test()
32 {
33     int ia[] = {1, 2, 3, 4, 5, 6};
34     unsigned sa = sizeof(ia) / sizeof(ia[0]);
35     test(Iter(ia), Iter(ia), 0, 0);
36     test(Iter(ia), Iter(ia), 10, 10);
37     test(Iter(ia), Iter(ia+1), 0, 1);
38     test(Iter(ia), Iter(ia+1), 10, 11);
39     test(Iter(ia), Iter(ia+2), 0, 3);
40     test(Iter(ia), Iter(ia+2), 10, 13);
41     test(Iter(ia), Iter(ia+sa), 0, 21);
42     test(Iter(ia), Iter(ia+sa), 10, 31);
43 }
44 
45 int main(int, char**)
46 {
47     test<input_iterator<const int*> >();
48     test<forward_iterator<const int*> >();
49     test<bidirectional_iterator<const int*> >();
50     test<random_access_iterator<const int*> >();
51     test<const int*>();
52 
53   return 0;
54 }
55