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___ITERATOR_DATA_H
11#define _LIBCPP___ITERATOR_DATA_H
12
13#include <__config>
14#include <initializer_list>
15
16#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
17# pragma GCC system_header
18#endif
19
20_LIBCPP_BEGIN_NAMESPACE_STD
21
22#if _LIBCPP_STD_VER >= 17
23
24template <class _Cont>
25constexpr _LIBCPP_HIDE_FROM_ABI auto data(_Cont& __c) noexcept(noexcept(__c.data())) -> decltype(__c.data()) {
26 return __c.data();
27}
28
29template <class _Cont>
30constexpr _LIBCPP_HIDE_FROM_ABI auto data(const _Cont& __c) noexcept(noexcept(__c.data())) -> decltype(__c.data()) {
31 return __c.data();
32}
33
34template <class _Tp, size_t _Sz>
35_LIBCPP_HIDE_FROM_ABI constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept {
36 return __array;
37}
38
39template <class _Ep>
40_LIBCPP_HIDE_FROM_ABI constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept {
41 return __il.begin();
42}
43
44#endif
45
46_LIBCPP_END_NAMESPACE_STD
47
48#endif // _LIBCPP___ITERATOR_DATA_H
49