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 25 template <class _Cont> 26 constexpr _LIBCPP_HIDE_FROM_ABI auto data(_Cont& __c) noexcept(noexcept(__c.data())) -> decltype(__c.data()) { 27 return __c.data(); 28 } 29 30 template <class _Cont> 31 constexpr _LIBCPP_HIDE_FROM_ABI auto data(const _Cont& __c) noexcept(noexcept(__c.data())) -> decltype(__c.data()) { 32 return __c.data(); 33 } 34 35 template <class _Tp, size_t _Sz> 36 _LIBCPP_HIDE_FROM_ABI constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { 37 return __array; 38 } 39 40 template <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