| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <numeric> |
| |
| // Became constexpr in C++20 |
| // template <class ForwardIterator, class T> |
| // void iota(ForwardIterator first, ForwardIterator last, T value); |
| |
| #include <numeric> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "test_iterators.h" |
| |
| template <class InIter> |
| TEST_CONSTEXPR_CXX20 void |
| test() |
| { |
| int ia[] = {1, 2, 3, 4, 5}; |
| int ir[] = {5, 6, 7, 8, 9}; |
| const unsigned s = sizeof(ia) / sizeof(ia[0]); |
| std::iota(InIter(ia), InIter(ia+s), 5); |
| for (unsigned i = 0; i < s; ++i) |
| assert(ia[i] == ir[i]); |
| } |
| |
| TEST_CONSTEXPR_CXX20 bool |
| test() |
| { |
| test<forward_iterator<int*> >(); |
| test<bidirectional_iterator<int*> >(); |
| test<random_access_iterator<int*> >(); |
| test<int*>(); |
| |
| return true; |
| } |
| |
| int main(int, char**) |
| { |
| test(); |
| #if TEST_STD_VER > 17 |
| static_assert(test()); |
| #endif |
| return 0; |
| } |