| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| // UNSUPPORTED: !c++experimental |
| |
| // constexpr decltype(auto) operator*() const; |
| |
| #include <cassert> |
| #include <ranges> |
| |
| #include "test_macros.h" |
| #include "../types.h" |
| |
| constexpr bool test() { |
| int buffer[4][4] = {{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12}, {13, 14, 15, 16}}; |
| |
| { |
| std::ranges::join_view jv(buffer); |
| auto iter = jv.begin(); |
| for (int i = 1; i < 17; ++i) { |
| assert(*iter++ == i); |
| } |
| } |
| { |
| std::ranges::join_view jv(buffer); |
| auto iter = std::next(jv.begin(), 15); |
| assert(*iter++ == 16); |
| assert(iter == jv.end()); |
| } |
| { |
| ChildView children[4] = {ChildView(buffer[0]), ChildView(buffer[1]), ChildView(buffer[2]), ChildView(buffer[3])}; |
| auto jv = std::ranges::join_view(ParentView(children)); |
| auto iter = jv.begin(); |
| for (int i = 1; i < 17; ++i) { |
| assert(*iter == i); |
| ++iter; |
| } |
| } |
| |
| return true; |
| } |
| |
| int main(int, char**) { |
| test(); |
| static_assert(test()); |
| |
| return 0; |
| } |