| //===---------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===---------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___FWD_SUBRANGE_H |
| #define _LIBCPP___FWD_SUBRANGE_H |
| |
| #include <__config> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| #if _LIBCPP_STD_VER >= 20 |
| |
| #include <__iterator/concepts.h> |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| namespace ranges { |
| |
| enum class subrange_kind : bool { unsized, sized }; |
| |
| template <input_or_output_iterator _Iter, sentinel_for<_Iter> _Sent, subrange_kind _Kind> |
| requires(_Kind == subrange_kind::sized || !sized_sentinel_for<_Sent, _Iter>) |
| class _LIBCPP_TEMPLATE_VIS subrange; |
| |
| } // namespace ranges |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP_STD_VER >= 20 |
| |
| #endif // _LIBCPP___FWD_SUBRANGE_H |
