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 26 TEST_CONSTEXPR bool equalToTwo(int v) { return v == 2; } 27 28 #if TEST_STD_VER > 17 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 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 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
