368faacac7
This commit reverts 5aaefa51 (and also partly 7f285f48e77 and b6d75682f9, which were related to the original commit). As landed, 5aaefa51 had unintended consequences on some downstream bots and didn't have proper coverage upstream due to a few subtle things. Implementing this is something we should do in libc++, however we'll first need to address a few issues listed in https://reviews.llvm.org/D106124#3349710. Differential Revision: https://reviews.llvm.org/D120683
352 lines
12 KiB
C++
352 lines
12 KiB
C++
// -*- C++ -*-
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef _LIBCPP___MEMORY_UNINITIALIZED_ALGORITHMS_H
|
|
#define _LIBCPP___MEMORY_UNINITIALIZED_ALGORITHMS_H
|
|
|
|
#include <__config>
|
|
#include <__iterator/iterator_traits.h>
|
|
#include <__memory/addressof.h>
|
|
#include <__memory/construct_at.h>
|
|
#include <__memory/voidify.h>
|
|
#include <__utility/move.h>
|
|
#include <__utility/pair.h>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
// This is a simplified version of C++20 `unreachable_sentinel` that doesn't use concepts and thus can be used in any
|
|
// language mode.
|
|
struct __unreachable_sentinel {
|
|
template <class _Iter>
|
|
_LIBCPP_HIDE_FROM_ABI friend _LIBCPP_CONSTEXPR bool operator!=(const _Iter&, __unreachable_sentinel) _NOEXCEPT {
|
|
return true;
|
|
}
|
|
};
|
|
|
|
// uninitialized_copy
|
|
|
|
template <class _ValueType, class _InputIterator, class _Sentinel1, class _ForwardIterator, class _Sentinel2>
|
|
inline _LIBCPP_HIDE_FROM_ABI pair<_InputIterator, _ForwardIterator>
|
|
__uninitialized_copy(_InputIterator __ifirst, _Sentinel1 __ilast,
|
|
_ForwardIterator __ofirst, _Sentinel2 __olast) {
|
|
_ForwardIterator __idx = __ofirst;
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
try {
|
|
#endif
|
|
for (; __ifirst != __ilast && __idx != __olast; ++__ifirst, (void)++__idx)
|
|
::new (_VSTD::__voidify(*__idx)) _ValueType(*__ifirst);
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
} catch (...) {
|
|
_VSTD::__destroy(__ofirst, __idx);
|
|
throw;
|
|
}
|
|
#endif
|
|
|
|
return pair<_InputIterator, _ForwardIterator>(_VSTD::move(__ifirst), _VSTD::move(__idx));
|
|
}
|
|
|
|
template <class _InputIterator, class _ForwardIterator>
|
|
_ForwardIterator uninitialized_copy(_InputIterator __ifirst, _InputIterator __ilast,
|
|
_ForwardIterator __ofirst) {
|
|
typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType;
|
|
auto __result = _VSTD::__uninitialized_copy<_ValueType>(_VSTD::move(__ifirst), _VSTD::move(__ilast),
|
|
_VSTD::move(__ofirst), __unreachable_sentinel());
|
|
return _VSTD::move(__result.second);
|
|
}
|
|
|
|
// uninitialized_copy_n
|
|
|
|
template <class _ValueType, class _InputIterator, class _Size, class _ForwardIterator, class _Sentinel>
|
|
inline _LIBCPP_HIDE_FROM_ABI pair<_InputIterator, _ForwardIterator>
|
|
__uninitialized_copy_n(_InputIterator __ifirst, _Size __n,
|
|
_ForwardIterator __ofirst, _Sentinel __olast) {
|
|
_ForwardIterator __idx = __ofirst;
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
try {
|
|
#endif
|
|
for (; __n > 0 && __idx != __olast; ++__ifirst, (void)++__idx, (void)--__n)
|
|
::new (_VSTD::__voidify(*__idx)) _ValueType(*__ifirst);
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
} catch (...) {
|
|
_VSTD::__destroy(__ofirst, __idx);
|
|
throw;
|
|
}
|
|
#endif
|
|
|
|
return pair<_InputIterator, _ForwardIterator>(_VSTD::move(__ifirst), _VSTD::move(__idx));
|
|
}
|
|
|
|
template <class _InputIterator, class _Size, class _ForwardIterator>
|
|
inline _LIBCPP_HIDE_FROM_ABI _ForwardIterator uninitialized_copy_n(_InputIterator __ifirst, _Size __n,
|
|
_ForwardIterator __ofirst) {
|
|
typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType;
|
|
auto __result = _VSTD::__uninitialized_copy_n<_ValueType>(_VSTD::move(__ifirst), __n, _VSTD::move(__ofirst),
|
|
__unreachable_sentinel());
|
|
return _VSTD::move(__result.second);
|
|
}
|
|
|
|
// uninitialized_fill
|
|
|
|
template <class _ValueType, class _ForwardIterator, class _Sentinel, class _Tp>
|
|
inline _LIBCPP_HIDE_FROM_ABI
|
|
_ForwardIterator __uninitialized_fill(_ForwardIterator __first, _Sentinel __last, const _Tp& __x)
|
|
{
|
|
_ForwardIterator __idx = __first;
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
try
|
|
{
|
|
#endif
|
|
for (; __idx != __last; ++__idx)
|
|
::new (_VSTD::__voidify(*__idx)) _ValueType(__x);
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
}
|
|
catch (...)
|
|
{
|
|
_VSTD::__destroy(__first, __idx);
|
|
throw;
|
|
}
|
|
#endif
|
|
|
|
return __idx;
|
|
}
|
|
|
|
template <class _ForwardIterator, class _Tp>
|
|
inline _LIBCPP_HIDE_FROM_ABI
|
|
void uninitialized_fill(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __x)
|
|
{
|
|
typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType;
|
|
(void)_VSTD::__uninitialized_fill<_ValueType>(__first, __last, __x);
|
|
}
|
|
|
|
// uninitialized_fill_n
|
|
|
|
template <class _ValueType, class _ForwardIterator, class _Size, class _Tp>
|
|
inline _LIBCPP_HIDE_FROM_ABI
|
|
_ForwardIterator __uninitialized_fill_n(_ForwardIterator __first, _Size __n, const _Tp& __x)
|
|
{
|
|
_ForwardIterator __idx = __first;
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
try
|
|
{
|
|
#endif
|
|
for (; __n > 0; ++__idx, (void) --__n)
|
|
::new (_VSTD::__voidify(*__idx)) _ValueType(__x);
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
}
|
|
catch (...)
|
|
{
|
|
_VSTD::__destroy(__first, __idx);
|
|
throw;
|
|
}
|
|
#endif
|
|
|
|
return __idx;
|
|
}
|
|
|
|
template <class _ForwardIterator, class _Size, class _Tp>
|
|
inline _LIBCPP_HIDE_FROM_ABI
|
|
_ForwardIterator uninitialized_fill_n(_ForwardIterator __first, _Size __n, const _Tp& __x)
|
|
{
|
|
typedef typename iterator_traits<_ForwardIterator>::value_type _ValueType;
|
|
return _VSTD::__uninitialized_fill_n<_ValueType>(__first, __n, __x);
|
|
}
|
|
|
|
#if _LIBCPP_STD_VER > 14
|
|
|
|
// uninitialized_default_construct
|
|
|
|
template <class _ValueType, class _ForwardIterator, class _Sentinel>
|
|
inline _LIBCPP_HIDE_FROM_ABI
|
|
_ForwardIterator __uninitialized_default_construct(_ForwardIterator __first, _Sentinel __last) {
|
|
auto __idx = __first;
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
try {
|
|
#endif
|
|
for (; __idx != __last; ++__idx)
|
|
::new (_VSTD::__voidify(*__idx)) _ValueType;
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
} catch (...) {
|
|
_VSTD::__destroy(__first, __idx);
|
|
throw;
|
|
}
|
|
#endif
|
|
|
|
return __idx;
|
|
}
|
|
|
|
template <class _ForwardIterator>
|
|
inline _LIBCPP_HIDE_FROM_ABI
|
|
void uninitialized_default_construct(_ForwardIterator __first, _ForwardIterator __last) {
|
|
using _ValueType = typename iterator_traits<_ForwardIterator>::value_type;
|
|
(void)_VSTD::__uninitialized_default_construct<_ValueType>(
|
|
_VSTD::move(__first), _VSTD::move(__last));
|
|
}
|
|
|
|
// uninitialized_default_construct_n
|
|
|
|
template <class _ValueType, class _ForwardIterator, class _Size>
|
|
inline _LIBCPP_HIDE_FROM_ABI
|
|
_ForwardIterator __uninitialized_default_construct_n(_ForwardIterator __first, _Size __n) {
|
|
auto __idx = __first;
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
try {
|
|
#endif
|
|
for (; __n > 0; ++__idx, (void) --__n)
|
|
::new (_VSTD::__voidify(*__idx)) _ValueType;
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
} catch (...) {
|
|
_VSTD::__destroy(__first, __idx);
|
|
throw;
|
|
}
|
|
#endif
|
|
|
|
return __idx;
|
|
}
|
|
|
|
template <class _ForwardIterator, class _Size>
|
|
inline _LIBCPP_HIDE_FROM_ABI
|
|
_ForwardIterator uninitialized_default_construct_n(_ForwardIterator __first, _Size __n) {
|
|
using _ValueType = typename iterator_traits<_ForwardIterator>::value_type;
|
|
return _VSTD::__uninitialized_default_construct_n<_ValueType>(_VSTD::move(__first), __n);
|
|
}
|
|
|
|
// uninitialized_value_construct
|
|
|
|
template <class _ValueType, class _ForwardIterator, class _Sentinel>
|
|
inline _LIBCPP_HIDE_FROM_ABI
|
|
_ForwardIterator __uninitialized_value_construct(_ForwardIterator __first, _Sentinel __last) {
|
|
auto __idx = __first;
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
try {
|
|
#endif
|
|
for (; __idx != __last; ++__idx)
|
|
::new (_VSTD::__voidify(*__idx)) _ValueType();
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
} catch (...) {
|
|
_VSTD::__destroy(__first, __idx);
|
|
throw;
|
|
}
|
|
#endif
|
|
|
|
return __idx;
|
|
}
|
|
|
|
template <class _ForwardIterator>
|
|
inline _LIBCPP_HIDE_FROM_ABI
|
|
void uninitialized_value_construct(_ForwardIterator __first, _ForwardIterator __last) {
|
|
using _ValueType = typename iterator_traits<_ForwardIterator>::value_type;
|
|
(void)_VSTD::__uninitialized_value_construct<_ValueType>(
|
|
_VSTD::move(__first), _VSTD::move(__last));
|
|
}
|
|
|
|
// uninitialized_value_construct_n
|
|
|
|
template <class _ValueType, class _ForwardIterator, class _Size>
|
|
inline _LIBCPP_HIDE_FROM_ABI
|
|
_ForwardIterator __uninitialized_value_construct_n(_ForwardIterator __first, _Size __n) {
|
|
auto __idx = __first;
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
try {
|
|
#endif
|
|
for (; __n > 0; ++__idx, (void) --__n)
|
|
::new (_VSTD::__voidify(*__idx)) _ValueType();
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
} catch (...) {
|
|
_VSTD::__destroy(__first, __idx);
|
|
throw;
|
|
}
|
|
#endif
|
|
|
|
return __idx;
|
|
}
|
|
|
|
template <class _ForwardIterator, class _Size>
|
|
inline _LIBCPP_HIDE_FROM_ABI
|
|
_ForwardIterator uninitialized_value_construct_n(_ForwardIterator __first, _Size __n) {
|
|
using _ValueType = typename iterator_traits<_ForwardIterator>::value_type;
|
|
return __uninitialized_value_construct_n<_ValueType>(_VSTD::move(__first), __n);
|
|
}
|
|
|
|
// uninitialized_move
|
|
|
|
template <class _ValueType, class _InputIterator, class _Sentinel1, class _ForwardIterator, class _Sentinel2,
|
|
class _IterMove>
|
|
inline _LIBCPP_HIDE_FROM_ABI pair<_InputIterator, _ForwardIterator>
|
|
__uninitialized_move(_InputIterator __ifirst, _Sentinel1 __ilast,
|
|
_ForwardIterator __ofirst, _Sentinel2 __olast, _IterMove __iter_move) {
|
|
auto __idx = __ofirst;
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
try {
|
|
#endif
|
|
for (; __ifirst != __ilast && __idx != __olast; ++__idx, (void)++__ifirst) {
|
|
::new (_VSTD::__voidify(*__idx)) _ValueType(__iter_move(__ifirst));
|
|
}
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
} catch (...) {
|
|
_VSTD::__destroy(__ofirst, __idx);
|
|
throw;
|
|
}
|
|
#endif
|
|
|
|
return {_VSTD::move(__ifirst), _VSTD::move(__idx)};
|
|
}
|
|
|
|
template <class _InputIterator, class _ForwardIterator>
|
|
inline _LIBCPP_HIDE_FROM_ABI _ForwardIterator uninitialized_move(_InputIterator __ifirst, _InputIterator __ilast,
|
|
_ForwardIterator __ofirst) {
|
|
using _ValueType = typename iterator_traits<_ForwardIterator>::value_type;
|
|
auto __iter_move = [](auto&& __iter) -> decltype(auto) { return _VSTD::move(*__iter); };
|
|
|
|
auto __result = _VSTD::__uninitialized_move<_ValueType>(_VSTD::move(__ifirst), _VSTD::move(__ilast),
|
|
_VSTD::move(__ofirst), __unreachable_sentinel(), __iter_move);
|
|
return _VSTD::move(__result.second);
|
|
}
|
|
|
|
// uninitialized_move_n
|
|
|
|
template <class _ValueType, class _InputIterator, class _Size, class _ForwardIterator, class _Sentinel, class _IterMove>
|
|
inline _LIBCPP_HIDE_FROM_ABI pair<_InputIterator, _ForwardIterator>
|
|
__uninitialized_move_n(_InputIterator __ifirst, _Size __n,
|
|
_ForwardIterator __ofirst, _Sentinel __olast, _IterMove __iter_move) {
|
|
auto __idx = __ofirst;
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
try {
|
|
#endif
|
|
for (; __n > 0 && __idx != __olast; ++__idx, (void)++__ifirst, --__n)
|
|
::new (_VSTD::__voidify(*__idx)) _ValueType(__iter_move(__ifirst));
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
} catch (...) {
|
|
_VSTD::__destroy(__ofirst, __idx);
|
|
throw;
|
|
}
|
|
#endif
|
|
|
|
return {_VSTD::move(__ifirst), _VSTD::move(__idx)};
|
|
}
|
|
|
|
template <class _InputIterator, class _Size, class _ForwardIterator>
|
|
inline _LIBCPP_HIDE_FROM_ABI pair<_InputIterator, _ForwardIterator>
|
|
uninitialized_move_n(_InputIterator __ifirst, _Size __n, _ForwardIterator __ofirst) {
|
|
using _ValueType = typename iterator_traits<_ForwardIterator>::value_type;
|
|
auto __iter_move = [](auto&& __iter) -> decltype(auto) { return _VSTD::move(*__iter); };
|
|
|
|
return _VSTD::__uninitialized_move_n<_ValueType>(_VSTD::move(__ifirst), __n, _VSTD::move(__ofirst),
|
|
__unreachable_sentinel(), __iter_move);
|
|
}
|
|
|
|
#endif // _LIBCPP_STD_VER > 14
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP___MEMORY_UNINITIALIZED_ALGORITHMS_H
|