1// -*- C++ -*-
2//===---------------------------------------------------------------------===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===---------------------------------------------------------------------===//
9
10#ifndef _LIBCPP___FWD_SPAN_H
11#define _LIBCPP___FWD_SPAN_H
12
13#include <__config>
14#include <__cstddef/size_t.h>
15#include <limits>
16
17#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
18# pragma GCC system_header
19#endif
20
21_LIBCPP_PUSH_MACROS
22#include <__undef_macros>
23
24_LIBCPP_BEGIN_NAMESPACE_STD
25
26#if _LIBCPP_STD_VER >= 20
27
28inline constexpr size_t dynamic_extent = numeric_limits<size_t>::max();
29template <typename _Tp, size_t _Extent = dynamic_extent>
30class span;
31
32#endif
33
34_LIBCPP_END_NAMESPACE_STD
35
36_LIBCPP_POP_MACROS
37
38#endif // _LIBCPP___FWD_SPAN_H
39