63 lines · cpp
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-exception6//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++1716// 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 > 1726TEST_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#endif35 36template <class Iter>37void38test()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 > 1758 static_assert(test_constexpr());59#endif60 61 return 0;62}63