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