| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <algorithm> |
| |
| // template<ForwardIterator Iter, Callable Generator> |
| // requires OutputIterator<Iter, Generator::result_type> |
| // && CopyConstructible<Generator> |
| // constexpr void // constexpr after c++17 |
| // generate(Iter first, Iter last, Generator gen); |
| |
| #include <algorithm> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "test_iterators.h" |
| |
| struct gen_test |
| { |
| TEST_CONSTEXPR int operator()() const {return 1;} |
| }; |
| |
| |
| #if TEST_STD_VER > 17 |
| TEST_CONSTEXPR bool test_constexpr() { |
| int ia[] = {0, 1, 2, 3, 4}; |
| |
| std::generate(std::begin(ia), std::end(ia), gen_test()); |
| |
| return std::all_of(std::begin(ia), std::end(ia), [](int x) { return x == 1; }) |
| ; |
| } |
| #endif |
| |
| |
| template <class Iter> |
| void |
| test() |
| { |
| const unsigned n = 4; |
| int ia[n] = {0}; |
| std::generate(Iter(ia), Iter(ia+n), gen_test()); |
| assert(ia[0] == 1); |
| assert(ia[1] == 1); |
| assert(ia[2] == 1); |
| assert(ia[3] == 1); |
| } |
| |
| int main(int, char**) |
| { |
| test<forward_iterator<int*> >(); |
| test<bidirectional_iterator<int*> >(); |
| test<random_access_iterator<int*> >(); |
| test<int*>(); |
| |
| #if TEST_STD_VER > 17 |
| static_assert(test_constexpr()); |
| #endif |
| |
| return 0; |
| } |