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// <algorithm>
11
12// template<ForwardIterator Iter, class T>
13//   requires OutputIterator<Iter, Iter::reference>
14//         && OutputIterator<Iter, const T&>
15//         && HasEqualTo<Iter::value_type, T>
16//   constexpr void      // constexpr after C++17
17//   replace(Iter first, Iter last, const T& old_value, const T& new_value);
18
19#include <algorithm>
20#include <cassert>
21
22#include "test_macros.h"
23#include "test_iterators.h"
24
25
26#if TEST_STD_VER > 17
27TEST_CONSTEXPR bool test_constexpr() {
28          int ia[]       = {0, 1, 2, 3, 4};
29    const int expected[] = {0, 1, 5, 3, 4};
30
31    std::replace(std::begin(ia), std::end(ia), 2, 5);
32    return std::equal(std::begin(ia), std::end(ia), std::begin(expected), std::end(expected))
33        ;
34    }
35#endif
36
37template <class Iter>
38void
39test()
40{
41    int ia[] = {0, 1, 2, 3, 4};
42    const unsigned sa = sizeof(ia)/sizeof(ia[0]);
43    std::replace(Iter(ia), Iter(ia+sa), 2, 5);
44    assert(ia[0] == 0);
45    assert(ia[1] == 1);
46    assert(ia[2] == 5);
47    assert(ia[3] == 3);
48    assert(ia[4] == 4);
49}
50
51int main()
52{
53    test<forward_iterator<int*> >();
54    test<bidirectional_iterator<int*> >();
55    test<random_access_iterator<int*> >();
56    test<int*>();
57
58#if TEST_STD_VER > 17
59    static_assert(test_constexpr());
60#endif
61}
62