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// <algorithm>
10
11// template<ForwardIterator Iter, class T>
12// requires OutputIterator<Iter, Iter::reference>
13// && OutputIterator<Iter, const T&>
14// && HasEqualTo<Iter::value_type, T>
15// constexpr void // constexpr after C++17
16// replace(Iter first, Iter last, const T& old_value, const T& new_value);
17
18#include <algorithm>
19#include <cassert>
20
21#include "test_macros.h"
22#include "test_iterators.h"
23
24
25#if TEST_STD_VER > 17
26TEST_CONSTEXPR bool test_constexpr() {
27 int ia[] = {0, 1, 2, 3, 4};
28 const int expected[] = {0, 1, 5, 3, 4};
29
30 std::replace(std::begin(ia), std::end(ia), 2, 5);
31 return std::equal(std::begin(ia), std::end(ia), std::begin(expected), std::end(expected))
32 ;
33 }
34#endif
35
36template <class Iter>
37void
38test()
39{
40 int ia[] = {0, 1, 2, 3, 4};
41 const unsigned sa = sizeof(ia)/sizeof(ia[0]);
42 std::replace(Iter(ia), Iter(ia+sa), 2, 5);
43 assert(ia[0] == 0);
44 assert(ia[1] == 1);
45 assert(ia[2] == 5);
46 assert(ia[3] == 3);
47 assert(ia[4] == 4);
48}
49
50int main(int, char**)
51{
52 test<forward_iterator<int*> >();
53 test<bidirectional_iterator<int*> >();
54 test<random_access_iterator<int*> >();
55 test<int*>();
56
57#if TEST_STD_VER > 17
58 static_assert(test_constexpr());
59#endif
60
61 return 0;
62}
63

source code of libcxx/test/std/algorithms/alg.modifying.operations/alg.replace/replace.pass.cpp