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
test_constexpr()27 TEST_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
37 template <class Iter>
38 void
test()39 test()
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
main()51 int 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