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 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 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 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
