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 <cstddef>
15#include <initializer_list>
16
17#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
18# pragma GCC system_header
19#endif
20
21_LIBCPP_BEGIN_NAMESPACE_STD
22
23#if _LIBCPP_STD_VER >= 17
24
25template <class _Cont>
26constexpr _LIBCPP_HIDE_FROM_ABI auto data(_Cont& __c) noexcept(noexcept(__c.data())) -> decltype(__c.data()) {
27 return __c.data();
28}
29
30template <class _Cont>
31constexpr _LIBCPP_HIDE_FROM_ABI auto data(const _Cont& __c) noexcept(noexcept(__c.data())) -> decltype(__c.data()) {
32 return __c.data();
33}
34
35template <class _Tp, size_t _Sz>
36_LIBCPP_HIDE_FROM_ABI constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept {
37 return __array;
38}
39
40template <class _Ep>
41_LIBCPP_HIDE_FROM_ABI constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept {
42 return __il.begin();
43}
44
45#endif
46
47_LIBCPP_END_NAMESPACE_STD
48
49#endif // _LIBCPP___ITERATOR_DATA_H
50