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66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <algorithm>
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// template<ForwardIterator Iter, Predicate<auto, Iter::value_type> Pred, class T>
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// requires OutputIterator<Iter, Iter::reference>
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// && OutputIterator<Iter, const T&>
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// && CopyConstructible<Pred>
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// constexpr void // constexpr after C++17
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// replace_if(Iter first, Iter last, Pred pred, const T& new_value);
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#include <algorithm>
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#include <functional>
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#include <cassert>
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#include "test_macros.h"
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#include "test_iterators.h"
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TEST_CONSTEXPR bool equalToTwo(int v) { return v == 2; }
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#if TEST_STD_VER > 17
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TEST_CONSTEXPR bool test_constexpr() {
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int ia[] = {0, 1, 2, 3, 4};
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const int expected[] = {0, 1, 5, 3, 4};
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std::replace_if(std::begin(ia), std::end(ia), equalToTwo, 5);
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return std::equal(std::begin(ia), std::end(ia), std::begin(expected), std::end(expected))
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;
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}
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#endif
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template <class Iter>
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void
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test()
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{
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int ia[] = {0, 1, 2, 3, 4};
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const unsigned sa = sizeof(ia)/sizeof(ia[0]);
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std::replace_if(Iter(ia), Iter(ia+sa), equalToTwo, 5);
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assert(ia[0] == 0);
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assert(ia[1] == 1);
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assert(ia[2] == 5);
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assert(ia[3] == 3);
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assert(ia[4] == 4);
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}
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int main(int, char**)
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{
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test<forward_iterator<int*> >();
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test<bidirectional_iterator<int*> >();
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test<random_access_iterator<int*> >();
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test<int*>();
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#if TEST_STD_VER > 17
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static_assert(test_constexpr());
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#endif
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return 0;
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}
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