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
23 template <class Iter, class T>
24 void
test(Iter first,Iter last,T init,T x)25 test(Iter first, Iter last, T init, T x)
26 {
27 assert(std::accumulate(first, last, init) == x);
28 }
29
30 template <class Iter>
31 void
test()32 test()
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
main()46 int 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