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, Predicate<auto, Iter::value_type> Pred, class T>
13 // requires OutputIterator<Iter, Iter::reference>
14 // && OutputIterator<Iter, const T&>
15 // && CopyConstructible<Pred>
16 // constexpr void // constexpr after C++17
17 // replace_if(Iter first, Iter last, Pred pred, const T& new_value);
18
19 #include <algorithm>
20 #include <functional>
21 #include <cassert>
22
23 #include "test_macros.h"
24 #include "test_iterators.h"
25
equalToTwo(int v)26 TEST_CONSTEXPR bool equalToTwo(int v) { return v == 2; }
27
28 #if TEST_STD_VER > 17
test_constexpr()29 TEST_CONSTEXPR bool test_constexpr() {
30 int ia[] = {0, 1, 2, 3, 4};
31 const int expected[] = {0, 1, 5, 3, 4};
32
33 std::replace_if(std::begin(ia), std::end(ia), equalToTwo, 5);
34 return std::equal(std::begin(ia), std::end(ia), std::begin(expected), std::end(expected))
35 ;
36 }
37 #endif
38
39
40 template <class Iter>
41 void
test()42 test()
43 {
44 int ia[] = {0, 1, 2, 3, 4};
45 const unsigned sa = sizeof(ia)/sizeof(ia[0]);
46 std::replace_if(Iter(ia), Iter(ia+sa), equalToTwo, 5);
47 assert(ia[0] == 0);
48 assert(ia[1] == 1);
49 assert(ia[2] == 5);
50 assert(ia[3] == 3);
51 assert(ia[4] == 4);
52 }
53
main()54 int main()
55 {
56 test<forward_iterator<int*> >();
57 test<bidirectional_iterator<int*> >();
58 test<random_access_iterator<int*> >();
59 test<int*>();
60
61 #if TEST_STD_VER > 17
62 static_assert(test_constexpr());
63 #endif
64 }
65