cb950c9dc9
We did not mark std::begin/std::end as noexcept for C-style arrays, we did not have conditional noexcept on cbegin/cend, and we did not mark array cbegin/cend as constexpr in all Standard modes. Since this is a LWG issue, we should implement it as a DR in all Standard modes as usual. This patch fixes these issues and adds test coverage. Fixes #67471.
121 lines
2.5 KiB
C++
121 lines
2.5 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___ITERATOR_ACCESS_H
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#define _LIBCPP___ITERATOR_ACCESS_H
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#include <__config>
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#include <cstddef>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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template <class _Tp, size_t _Np>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _Tp* begin(_Tp (&__array)[_Np]) _NOEXCEPT {
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return __array;
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}
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template <class _Tp, size_t _Np>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _Tp* end(_Tp (&__array)[_Np]) _NOEXCEPT {
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return __array + _Np;
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}
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#if !defined(_LIBCPP_CXX03_LANG)
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template <class _Cp>
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
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auto
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begin(_Cp& __c) -> decltype(__c.begin())
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{
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return __c.begin();
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}
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template <class _Cp>
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
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auto
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begin(const _Cp& __c) -> decltype(__c.begin())
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{
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return __c.begin();
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}
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template <class _Cp>
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
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auto
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end(_Cp& __c) -> decltype(__c.end())
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{
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return __c.end();
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}
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template <class _Cp>
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
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auto
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end(const _Cp& __c) -> decltype(__c.end())
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{
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return __c.end();
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}
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#if _LIBCPP_STD_VER >= 14
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template <class _Cp>
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_LIBCPP_HIDE_FROM_ABI constexpr auto cbegin(const _Cp& __c) noexcept(noexcept(std::begin(__c)))
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-> decltype(std::begin(__c)) {
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return std::begin(__c);
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}
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template <class _Cp>
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_LIBCPP_HIDE_FROM_ABI constexpr auto cend(const _Cp& __c) noexcept(noexcept(std::end(__c))) -> decltype(std::end(__c)) {
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return std::end(__c);
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}
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#endif
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#else // defined(_LIBCPP_CXX03_LANG)
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template <class _Cp>
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_LIBCPP_INLINE_VISIBILITY
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typename _Cp::iterator
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begin(_Cp& __c)
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{
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return __c.begin();
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}
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template <class _Cp>
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_LIBCPP_INLINE_VISIBILITY
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typename _Cp::const_iterator
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begin(const _Cp& __c)
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{
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return __c.begin();
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}
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template <class _Cp>
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_LIBCPP_INLINE_VISIBILITY
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typename _Cp::iterator
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end(_Cp& __c)
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{
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return __c.end();
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}
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template <class _Cp>
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_LIBCPP_INLINE_VISIBILITY
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typename _Cp::const_iterator
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end(const _Cp& __c)
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{
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return __c.end();
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}
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#endif // !defined(_LIBCPP_CXX03_LANG)
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___ITERATOR_ACCESS_H
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