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_PUSH_MACROS
22 #include <__undef_macros>
23 
24 _LIBCPP_BEGIN_NAMESPACE_STD
25 
26 #if _LIBCPP_STD_VER > 14
27 
28 template <class _Cont> constexpr
29 _LIBCPP_INLINE_VISIBILITY
30 auto data(_Cont& __c)
31 _NOEXCEPT_(noexcept(__c.data()))
32 -> decltype        (__c.data())
33 { return            __c.data(); }
34 
35 template <class _Cont> constexpr
36 _LIBCPP_INLINE_VISIBILITY
37 auto data(const _Cont& __c)
38 _NOEXCEPT_(noexcept(__c.data()))
39 -> decltype        (__c.data())
40 { return            __c.data(); }
41 
42 template <class _Tp, size_t _Sz>
43 _LIBCPP_INLINE_VISIBILITY
44 constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; }
45 
46 template <class _Ep>
47 _LIBCPP_INLINE_VISIBILITY
48 constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); }
49 
50 #endif
51 
52 _LIBCPP_END_NAMESPACE_STD
53 
54 _LIBCPP_POP_MACROS
55 
56 #endif // _LIBCPP___ITERATOR_DATA_H
57