__cxx03/__iterator/data.h

0001 // -*- C++ -*-
0002 //===----------------------------------------------------------------------===//
0003 //
0004 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0005 // See https://llvm.org/LICENSE.txt for license information.
0006 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0007 //
0008 //===----------------------------------------------------------------------===//
0009
0010 #ifndef _LIBCPP___CXX03___ITERATOR_DATA_H
0011 #define _LIBCPP___CXX03___ITERATOR_DATA_H
0012
0013 #include <__cxx03/__config>
0014 #include <__cxx03/cstddef>
0015 #include <__cxx03/initializer_list>
0016
0017 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0018 #  pragma GCC system_header
0019 #endif
0020
0021 _LIBCPP_BEGIN_NAMESPACE_STD
0022
0023 #if _LIBCPP_STD_VER >= 17
0024
0025 template <class _Cont>
0026 constexpr _LIBCPP_HIDE_FROM_ABI auto data(_Cont& __c) noexcept(noexcept(__c.data())) -> decltype(__c.data()) {
0027   return __c.data();
0028 }
0029
0030 template <class _Cont>
0031 constexpr _LIBCPP_HIDE_FROM_ABI auto data(const _Cont& __c) noexcept(noexcept(__c.data())) -> decltype(__c.data()) {
0032   return __c.data();
0033 }
0034
0035 template <class _Tp, size_t _Sz>
0036 _LIBCPP_HIDE_FROM_ABI constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept {
0037   return __array;
0038 }
0039
0040 template <class _Ep>
0041 _LIBCPP_HIDE_FROM_ABI constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept {
0042   return __il.begin();
0043 }
0044
0045 #endif
0046
0047 _LIBCPP_END_NAMESPACE_STD
0048
0049 #endif // _LIBCPP___CXX03___ITERATOR_DATA_H