// Raw memory manipulators -*- C++ -*-
-// Copyright (C) 2001 Free Software Foundation, Inc.
+// Copyright (C) 2001-2021 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
-// Free Software Foundation; either version 2, or (at your option)
+// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
-// You should have received a copy of the GNU General Public License along
-// with this library; see the file COPYING. If not, write to the Free
-// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
-// USA.
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
-// As a special exception, you may use this file as part of a free software
-// library without restriction. Specifically, if other files instantiate
-// templates or use macros or inline functions from this file, or you compile
-// this file and link it with other files to produce an executable, this
-// file does not by itself cause the resulting executable to be covered by
-// the GNU General Public License. This exception does not however
-// invalidate any other reasons why the executable file might be covered by
-// the GNU General Public License.
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
/*
*
* purpose. It is provided "as is" without express or implied warranty.
*/
-/** @file stl_uninitialized.h
+/** @file bits/stl_uninitialized.h
* This is an internal header file, included by other library headers.
- * You should not attempt to use it directly.
+ * Do not attempt to use it directly. @headername{memory}
*/
-#ifndef _CPP_BITS_STL_UNINITIALIZED_H
-#define _CPP_BITS_STL_UNINITIALIZED_H 1
+#ifndef _STL_UNINITIALIZED_H
+#define _STL_UNINITIALIZED_H 1
-#include <cstring>
+#if __cplusplus > 201402L
+#include <bits/stl_pair.h>
+#endif
-namespace std
+#if __cplusplus >= 201103L
+#include <type_traits>
+#endif
+
+#include <ext/alloc_traits.h>
+
+namespace std _GLIBCXX_VISIBILITY(default)
{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
- // uninitialized_copy
-
- template<typename _InputIter, typename _ForwardIter>
- inline _ForwardIter
- __uninitialized_copy_aux(_InputIter __first, _InputIter __last,
- _ForwardIter __result,
- __true_type)
- { return copy(__first, __last, __result); }
-
- template<typename _InputIter, typename _ForwardIter>
- _ForwardIter
- __uninitialized_copy_aux(_InputIter __first, _InputIter __last,
- _ForwardIter __result,
- __false_type)
- {
- _ForwardIter __cur = __result;
- try {
- for ( ; __first != __last; ++__first, ++__cur)
- _Construct(&*__cur, *__first);
- return __cur;
- }
- catch(...)
- {
- _Destroy(__result, __cur);
- __throw_exception_again;
+ /** @addtogroup memory
+ * @{
+ */
+
+ /// @cond undocumented
+
+ template<bool _TrivialValueTypes>
+ struct __uninitialized_copy
+ {
+ template<typename _InputIterator, typename _ForwardIterator>
+ static _ForwardIterator
+ __uninit_copy(_InputIterator __first, _InputIterator __last,
+ _ForwardIterator __result)
+ {
+ _ForwardIterator __cur = __result;
+ __try
+ {
+ for (; __first != __last; ++__first, (void)++__cur)
+ std::_Construct(std::__addressof(*__cur), *__first);
+ return __cur;
+ }
+ __catch(...)
+ {
+ std::_Destroy(__result, __cur);
+ __throw_exception_again;
+ }
}
- }
+ };
+
+ template<>
+ struct __uninitialized_copy<true>
+ {
+ template<typename _InputIterator, typename _ForwardIterator>
+ static _ForwardIterator
+ __uninit_copy(_InputIterator __first, _InputIterator __last,
+ _ForwardIterator __result)
+ { return std::copy(__first, __last, __result); }
+ };
+
+ /// @endcond
/**
* @brief Copies the range [first,last) into result.
- * @param first An input iterator.
- * @param last An input iterator.
- * @param result An output iterator.
- * @return result + (first - last)
+ * @param __first An input iterator.
+ * @param __last An input iterator.
+ * @param __result An output iterator.
+ * @return __result + (__first - __last)
*
* Like copy(), but does not require an initialized output range.
*/
- template<typename _InputIter, typename _ForwardIter>
- inline _ForwardIter
- uninitialized_copy(_InputIter __first, _InputIter __last, _ForwardIter __result)
- {
- typedef typename iterator_traits<_ForwardIter>::value_type _ValueType;
- typedef typename __type_traits<_ValueType>::is_POD_type _Is_POD;
- return __uninitialized_copy_aux(__first, __last, __result, _Is_POD());
- }
-
- inline char*
- uninitialized_copy(const char* __first, const char* __last, char* __result)
- {
- memmove(__result, __first, __last - __first);
- return __result + (__last - __first);
- }
-
- inline wchar_t*
- uninitialized_copy(const wchar_t* __first, const wchar_t* __last,
- wchar_t* __result)
- {
- memmove(__result, __first, sizeof(wchar_t) * (__last - __first));
- return __result + (__last - __first);
- }
-
- // Valid if copy construction is equivalent to assignment, and if the
- // destructor is trivial.
- template<typename _ForwardIter, typename _Tp>
- inline void
- __uninitialized_fill_aux(_ForwardIter __first, _ForwardIter __last,
- const _Tp& __x, __true_type)
- { fill(__first, __last, __x); }
+ template<typename _InputIterator, typename _ForwardIterator>
+ inline _ForwardIterator
+ uninitialized_copy(_InputIterator __first, _InputIterator __last,
+ _ForwardIterator __result)
+ {
+ typedef typename iterator_traits<_InputIterator>::value_type
+ _ValueType1;
+ typedef typename iterator_traits<_ForwardIterator>::value_type
+ _ValueType2;
+#if __cplusplus < 201103L
+ const bool __assignable = true;
+#else
+ // Trivial types can have deleted copy constructor, but the std::copy
+ // optimization that uses memmove would happily "copy" them anyway.
+ static_assert(is_constructible<_ValueType2, decltype(*__first)>::value,
+ "result type must be constructible from value type of input range");
- template<typename _ForwardIter, typename _Tp>
- void
- __uninitialized_fill_aux(_ForwardIter __first, _ForwardIter __last,
- const _Tp& __x, __false_type)
- {
- _ForwardIter __cur = __first;
- try {
- for ( ; __cur != __last; ++__cur)
- _Construct(&*__cur, __x);
- }
- catch(...)
- {
- _Destroy(__first, __cur);
- __throw_exception_again;
- }
+ typedef typename iterator_traits<_InputIterator>::reference _RefType1;
+ typedef typename iterator_traits<_ForwardIterator>::reference _RefType2;
+ // Trivial types can have deleted assignment, so using std::copy
+ // would be ill-formed. Require assignability before using std::copy:
+ const bool __assignable = is_assignable<_RefType2, _RefType1>::value;
+#endif
+
+ return std::__uninitialized_copy<__is_trivial(_ValueType1)
+ && __is_trivial(_ValueType2)
+ && __assignable>::
+ __uninit_copy(__first, __last, __result);
}
+ /// @cond undocumented
+
+ template<bool _TrivialValueType>
+ struct __uninitialized_fill
+ {
+ template<typename _ForwardIterator, typename _Tp>
+ static void
+ __uninit_fill(_ForwardIterator __first, _ForwardIterator __last,
+ const _Tp& __x)
+ {
+ _ForwardIterator __cur = __first;
+ __try
+ {
+ for (; __cur != __last; ++__cur)
+ std::_Construct(std::__addressof(*__cur), __x);
+ }
+ __catch(...)
+ {
+ std::_Destroy(__first, __cur);
+ __throw_exception_again;
+ }
+ }
+ };
+
+ template<>
+ struct __uninitialized_fill<true>
+ {
+ template<typename _ForwardIterator, typename _Tp>
+ static void
+ __uninit_fill(_ForwardIterator __first, _ForwardIterator __last,
+ const _Tp& __x)
+ { std::fill(__first, __last, __x); }
+ };
+
+ /// @endcond
+
/**
* @brief Copies the value x into the range [first,last).
- * @param first An input iterator.
- * @param last An input iterator.
- * @param x The source value.
+ * @param __first An input iterator.
+ * @param __last An input iterator.
+ * @param __x The source value.
* @return Nothing.
*
* Like fill(), but does not require an initialized output range.
*/
- template<typename _ForwardIter, typename _Tp>
+ template<typename _ForwardIterator, typename _Tp>
inline void
- uninitialized_fill(_ForwardIter __first, _ForwardIter __last, const _Tp& __x)
+ uninitialized_fill(_ForwardIterator __first, _ForwardIterator __last,
+ const _Tp& __x)
{
- typedef typename iterator_traits<_ForwardIter>::value_type _ValueType;
- typedef typename __type_traits<_ValueType>::is_POD_type _Is_POD;
- __uninitialized_fill_aux(__first, __last, __x, _Is_POD());
- }
+ typedef typename iterator_traits<_ForwardIterator>::value_type
+ _ValueType;
+#if __cplusplus < 201103L
+ const bool __assignable = true;
+#else
+ // Trivial types can have deleted copy constructor, but the std::fill
+ // optimization that uses memmove would happily "copy" them anyway.
+ static_assert(is_constructible<_ValueType, const _Tp&>::value,
+ "result type must be constructible from input type");
- // Valid if copy construction is equivalent to assignment, and if the
- // destructor is trivial.
- template<typename _ForwardIter, typename _Size, typename _Tp>
- inline _ForwardIter
- __uninitialized_fill_n_aux(_ForwardIter __first, _Size __n,
- const _Tp& __x, __true_type)
- {
- return fill_n(__first, __n, __x);
+ // Trivial types can have deleted assignment, so using std::fill
+ // would be ill-formed. Require assignability before using std::fill:
+ const bool __assignable = is_copy_assignable<_ValueType>::value;
+#endif
+
+ std::__uninitialized_fill<__is_trivial(_ValueType) && __assignable>::
+ __uninit_fill(__first, __last, __x);
}
- template<typename _ForwardIter, typename _Size, typename _Tp>
- _ForwardIter
- __uninitialized_fill_n_aux(_ForwardIter __first, _Size __n,
- const _Tp& __x, __false_type)
+ /// @cond undocumented
+
+ template<bool _TrivialValueType>
+ struct __uninitialized_fill_n
{
- _ForwardIter __cur = __first;
- try {
- for ( ; __n > 0; --__n, ++__cur)
- _Construct(&*__cur, __x);
- return __cur;
- }
- catch(...)
- {
- _Destroy(__first, __cur);
- __throw_exception_again;
+ template<typename _ForwardIterator, typename _Size, typename _Tp>
+ static _ForwardIterator
+ __uninit_fill_n(_ForwardIterator __first, _Size __n,
+ const _Tp& __x)
+ {
+ _ForwardIterator __cur = __first;
+ __try
+ {
+ for (; __n > 0; --__n, (void) ++__cur)
+ std::_Construct(std::__addressof(*__cur), __x);
+ return __cur;
+ }
+ __catch(...)
+ {
+ std::_Destroy(__first, __cur);
+ __throw_exception_again;
+ }
}
- }
+ };
+
+ template<>
+ struct __uninitialized_fill_n<true>
+ {
+ template<typename _ForwardIterator, typename _Size, typename _Tp>
+ static _ForwardIterator
+ __uninit_fill_n(_ForwardIterator __first, _Size __n,
+ const _Tp& __x)
+ { return std::fill_n(__first, __n, __x); }
+ };
+
+ /// @endcond
+ // _GLIBCXX_RESOLVE_LIB_DEFECTS
+ // DR 1339. uninitialized_fill_n should return the end of its range
/**
* @brief Copies the value x into the range [first,first+n).
- * @param first An input iterator.
- * @param n The number of copies to make.
- * @param x The source value.
- * @return first+n
+ * @param __first An input iterator.
+ * @param __n The number of copies to make.
+ * @param __x The source value.
+ * @return Nothing.
*
* Like fill_n(), but does not require an initialized output range.
*/
- template<typename _ForwardIter, typename _Size, typename _Tp>
- inline _ForwardIter
- uninitialized_fill_n(_ForwardIter __first, _Size __n, const _Tp& __x)
+ template<typename _ForwardIterator, typename _Size, typename _Tp>
+ inline _ForwardIterator
+ uninitialized_fill_n(_ForwardIterator __first, _Size __n, const _Tp& __x)
+ {
+ typedef typename iterator_traits<_ForwardIterator>::value_type
+ _ValueType;
+
+ // Trivial types do not need a constructor to begin their lifetime,
+ // so try to use std::fill_n to benefit from its memmove optimization.
+ // For arbitrary class types and floating point types we can't assume
+ // that __n > 0 and std::__size_to_integer(__n) > 0 are equivalent,
+ // so only use std::fill_n when _Size is already an integral type.
+#if __cplusplus < 201103L
+ const bool __can_fill = __is_integer<_Size>::__value;
+#else
+ // Trivial types can have deleted copy constructor, but the std::fill_n
+ // optimization that uses memmove would happily "copy" them anyway.
+ static_assert(is_constructible<_ValueType, const _Tp&>::value,
+ "result type must be constructible from input type");
+
+ // Trivial types can have deleted assignment, so using std::fill_n
+ // would be ill-formed. Require assignability before using std::fill_n:
+ constexpr bool __can_fill
+ = __and_<is_integral<_Size>, is_copy_assignable<_ValueType>>::value;
+#endif
+ return __uninitialized_fill_n<__is_trivial(_ValueType) && __can_fill>::
+ __uninit_fill_n(__first, __n, __x);
+ }
+
+ /// @cond undocumented
+
+ // Extensions: versions of uninitialized_copy, uninitialized_fill,
+ // and uninitialized_fill_n that take an allocator parameter.
+ // We dispatch back to the standard versions when we're given the
+ // default allocator. For nondefault allocators we do not use
+ // any of the POD optimizations.
+
+ template<typename _InputIterator, typename _ForwardIterator,
+ typename _Allocator>
+ _ForwardIterator
+ __uninitialized_copy_a(_InputIterator __first, _InputIterator __last,
+ _ForwardIterator __result, _Allocator& __alloc)
+ {
+ _ForwardIterator __cur = __result;
+ __try
+ {
+ typedef __gnu_cxx::__alloc_traits<_Allocator> __traits;
+ for (; __first != __last; ++__first, (void)++__cur)
+ __traits::construct(__alloc, std::__addressof(*__cur), *__first);
+ return __cur;
+ }
+ __catch(...)
+ {
+ std::_Destroy(__result, __cur, __alloc);
+ __throw_exception_again;
+ }
+ }
+
+ template<typename _InputIterator, typename _ForwardIterator, typename _Tp>
+ inline _ForwardIterator
+ __uninitialized_copy_a(_InputIterator __first, _InputIterator __last,
+ _ForwardIterator __result, allocator<_Tp>&)
+ { return std::uninitialized_copy(__first, __last, __result); }
+
+ template<typename _InputIterator, typename _ForwardIterator,
+ typename _Allocator>
+ inline _ForwardIterator
+ __uninitialized_move_a(_InputIterator __first, _InputIterator __last,
+ _ForwardIterator __result, _Allocator& __alloc)
+ {
+ return std::__uninitialized_copy_a(_GLIBCXX_MAKE_MOVE_ITERATOR(__first),
+ _GLIBCXX_MAKE_MOVE_ITERATOR(__last),
+ __result, __alloc);
+ }
+
+ template<typename _InputIterator, typename _ForwardIterator,
+ typename _Allocator>
+ inline _ForwardIterator
+ __uninitialized_move_if_noexcept_a(_InputIterator __first,
+ _InputIterator __last,
+ _ForwardIterator __result,
+ _Allocator& __alloc)
+ {
+ return std::__uninitialized_copy_a
+ (_GLIBCXX_MAKE_MOVE_IF_NOEXCEPT_ITERATOR(__first),
+ _GLIBCXX_MAKE_MOVE_IF_NOEXCEPT_ITERATOR(__last), __result, __alloc);
+ }
+
+ template<typename _ForwardIterator, typename _Tp, typename _Allocator>
+ void
+ __uninitialized_fill_a(_ForwardIterator __first, _ForwardIterator __last,
+ const _Tp& __x, _Allocator& __alloc)
+ {
+ _ForwardIterator __cur = __first;
+ __try
+ {
+ typedef __gnu_cxx::__alloc_traits<_Allocator> __traits;
+ for (; __cur != __last; ++__cur)
+ __traits::construct(__alloc, std::__addressof(*__cur), __x);
+ }
+ __catch(...)
+ {
+ std::_Destroy(__first, __cur, __alloc);
+ __throw_exception_again;
+ }
+ }
+
+ template<typename _ForwardIterator, typename _Tp, typename _Tp2>
+ inline void
+ __uninitialized_fill_a(_ForwardIterator __first, _ForwardIterator __last,
+ const _Tp& __x, allocator<_Tp2>&)
+ { std::uninitialized_fill(__first, __last, __x); }
+
+ template<typename _ForwardIterator, typename _Size, typename _Tp,
+ typename _Allocator>
+ _ForwardIterator
+ __uninitialized_fill_n_a(_ForwardIterator __first, _Size __n,
+ const _Tp& __x, _Allocator& __alloc)
{
- typedef typename iterator_traits<_ForwardIter>::value_type _ValueType;
- typedef typename __type_traits<_ValueType>::is_POD_type _Is_POD;
- return __uninitialized_fill_n_aux(__first, __n, __x, _Is_POD());
+ _ForwardIterator __cur = __first;
+ __try
+ {
+ typedef __gnu_cxx::__alloc_traits<_Allocator> __traits;
+ for (; __n > 0; --__n, (void) ++__cur)
+ __traits::construct(__alloc, std::__addressof(*__cur), __x);
+ return __cur;
+ }
+ __catch(...)
+ {
+ std::_Destroy(__first, __cur, __alloc);
+ __throw_exception_again;
+ }
}
- // Extensions: __uninitialized_copy_copy, __uninitialized_copy_fill,
- // __uninitialized_fill_copy.
+ template<typename _ForwardIterator, typename _Size, typename _Tp,
+ typename _Tp2>
+ inline _ForwardIterator
+ __uninitialized_fill_n_a(_ForwardIterator __first, _Size __n,
+ const _Tp& __x, allocator<_Tp2>&)
+ { return std::uninitialized_fill_n(__first, __n, __x); }
+
- // __uninitialized_copy_copy
+ // Extensions: __uninitialized_copy_move, __uninitialized_move_copy,
+ // __uninitialized_fill_move, __uninitialized_move_fill.
+ // All of these algorithms take a user-supplied allocator, which is used
+ // for construction and destruction.
+
+ // __uninitialized_copy_move
// Copies [first1, last1) into [result, result + (last1 - first1)), and
- // copies [first2, last2) into
+ // move [first2, last2) into
// [result, result + (last1 - first1) + (last2 - first2)).
-
- template<typename _InputIter1, typename _InputIter2, typename _ForwardIter>
- inline _ForwardIter
- __uninitialized_copy_copy(_InputIter1 __first1, _InputIter1 __last1,
- _InputIter2 __first2, _InputIter2 __last2,
- _ForwardIter __result)
+ template<typename _InputIterator1, typename _InputIterator2,
+ typename _ForwardIterator, typename _Allocator>
+ inline _ForwardIterator
+ __uninitialized_copy_move(_InputIterator1 __first1,
+ _InputIterator1 __last1,
+ _InputIterator2 __first2,
+ _InputIterator2 __last2,
+ _ForwardIterator __result,
+ _Allocator& __alloc)
{
- _ForwardIter __mid = uninitialized_copy(__first1, __last1, __result);
- try {
- return uninitialized_copy(__first2, __last2, __mid);
- }
- catch(...)
- {
- _Destroy(__result, __mid);
- __throw_exception_again;
+ _ForwardIterator __mid = std::__uninitialized_copy_a(__first1, __last1,
+ __result,
+ __alloc);
+ __try
+ {
+ return std::__uninitialized_move_a(__first2, __last2, __mid, __alloc);
+ }
+ __catch(...)
+ {
+ std::_Destroy(__result, __mid, __alloc);
+ __throw_exception_again;
}
}
- // __uninitialized_fill_copy
- // Fills [result, mid) with x, and copies [first, last) into
+ // __uninitialized_move_copy
+ // Moves [first1, last1) into [result, result + (last1 - first1)), and
+ // copies [first2, last2) into
+ // [result, result + (last1 - first1) + (last2 - first2)).
+ template<typename _InputIterator1, typename _InputIterator2,
+ typename _ForwardIterator, typename _Allocator>
+ inline _ForwardIterator
+ __uninitialized_move_copy(_InputIterator1 __first1,
+ _InputIterator1 __last1,
+ _InputIterator2 __first2,
+ _InputIterator2 __last2,
+ _ForwardIterator __result,
+ _Allocator& __alloc)
+ {
+ _ForwardIterator __mid = std::__uninitialized_move_a(__first1, __last1,
+ __result,
+ __alloc);
+ __try
+ {
+ return std::__uninitialized_copy_a(__first2, __last2, __mid, __alloc);
+ }
+ __catch(...)
+ {
+ std::_Destroy(__result, __mid, __alloc);
+ __throw_exception_again;
+ }
+ }
+
+ // __uninitialized_fill_move
+ // Fills [result, mid) with x, and moves [first, last) into
// [mid, mid + (last - first)).
- template<typename _ForwardIter, typename _Tp, typename _InputIter>
- inline _ForwardIter
- __uninitialized_fill_copy(_ForwardIter __result, _ForwardIter __mid,
- const _Tp& __x,
- _InputIter __first, _InputIter __last)
- {
- uninitialized_fill(__result, __mid, __x);
- try {
- return uninitialized_copy(__first, __last, __mid);
- }
- catch(...)
+ template<typename _ForwardIterator, typename _Tp, typename _InputIterator,
+ typename _Allocator>
+ inline _ForwardIterator
+ __uninitialized_fill_move(_ForwardIterator __result, _ForwardIterator __mid,
+ const _Tp& __x, _InputIterator __first,
+ _InputIterator __last, _Allocator& __alloc)
+ {
+ std::__uninitialized_fill_a(__result, __mid, __x, __alloc);
+ __try
{
- _Destroy(__result, __mid);
- __throw_exception_again;
+ return std::__uninitialized_move_a(__first, __last, __mid, __alloc);
+ }
+ __catch(...)
+ {
+ std::_Destroy(__result, __mid, __alloc);
+ __throw_exception_again;
}
}
- // __uninitialized_copy_fill
- // Copies [first1, last1) into [first2, first2 + (last1 - first1)), and
+ // __uninitialized_move_fill
+ // Moves [first1, last1) into [first2, first2 + (last1 - first1)), and
// fills [first2 + (last1 - first1), last2) with x.
- template<typename _InputIter, typename _ForwardIter, typename _Tp>
+ template<typename _InputIterator, typename _ForwardIterator, typename _Tp,
+ typename _Allocator>
inline void
- __uninitialized_copy_fill(_InputIter __first1, _InputIter __last1,
- _ForwardIter __first2, _ForwardIter __last2,
- const _Tp& __x)
- {
- _ForwardIter __mid2 = uninitialized_copy(__first1, __last1, __first2);
- try {
- uninitialized_fill(__mid2, __last2, __x);
- }
- catch(...)
+ __uninitialized_move_fill(_InputIterator __first1, _InputIterator __last1,
+ _ForwardIterator __first2,
+ _ForwardIterator __last2, const _Tp& __x,
+ _Allocator& __alloc)
+ {
+ _ForwardIterator __mid2 = std::__uninitialized_move_a(__first1, __last1,
+ __first2,
+ __alloc);
+ __try
+ {
+ std::__uninitialized_fill_a(__mid2, __last2, __x, __alloc);
+ }
+ __catch(...)
{
- _Destroy(__first2, __mid2);
- __throw_exception_again;
+ std::_Destroy(__first2, __mid2, __alloc);
+ __throw_exception_again;
}
}
-} // namespace std
+ /// @endcond
+
+#if __cplusplus >= 201103L
+ /// @cond undocumented
+
+ // Extensions: __uninitialized_default, __uninitialized_default_n,
+ // __uninitialized_default_a, __uninitialized_default_n_a.
+
+ template<bool _TrivialValueType>
+ struct __uninitialized_default_1
+ {
+ template<typename _ForwardIterator>
+ static void
+ __uninit_default(_ForwardIterator __first, _ForwardIterator __last)
+ {
+ _ForwardIterator __cur = __first;
+ __try
+ {
+ for (; __cur != __last; ++__cur)
+ std::_Construct(std::__addressof(*__cur));
+ }
+ __catch(...)
+ {
+ std::_Destroy(__first, __cur);
+ __throw_exception_again;
+ }
+ }
+ };
+
+ template<>
+ struct __uninitialized_default_1<true>
+ {
+ template<typename _ForwardIterator>
+ static void
+ __uninit_default(_ForwardIterator __first, _ForwardIterator __last)
+ {
+ if (__first == __last)
+ return;
+
+ typename iterator_traits<_ForwardIterator>::value_type* __val
+ = std::__addressof(*__first);
+ std::_Construct(__val);
+ if (++__first != __last)
+ std::fill(__first, __last, *__val);
+ }
+ };
+
+ template<bool _TrivialValueType>
+ struct __uninitialized_default_n_1
+ {
+ template<typename _ForwardIterator, typename _Size>
+ static _ForwardIterator
+ __uninit_default_n(_ForwardIterator __first, _Size __n)
+ {
+ _ForwardIterator __cur = __first;
+ __try
+ {
+ for (; __n > 0; --__n, (void) ++__cur)
+ std::_Construct(std::__addressof(*__cur));
+ return __cur;
+ }
+ __catch(...)
+ {
+ std::_Destroy(__first, __cur);
+ __throw_exception_again;
+ }
+ }
+ };
+
+ template<>
+ struct __uninitialized_default_n_1<true>
+ {
+ template<typename _ForwardIterator, typename _Size>
+ static _ForwardIterator
+ __uninit_default_n(_ForwardIterator __first, _Size __n)
+ {
+ if (__n > 0)
+ {
+ typename iterator_traits<_ForwardIterator>::value_type* __val
+ = std::__addressof(*__first);
+ std::_Construct(__val);
+ ++__first;
+ __first = std::fill_n(__first, __n - 1, *__val);
+ }
+ return __first;
+ }
+ };
+
+ // __uninitialized_default
+ // Fills [first, last) with value-initialized value_types.
+ template<typename _ForwardIterator>
+ inline void
+ __uninitialized_default(_ForwardIterator __first,
+ _ForwardIterator __last)
+ {
+ typedef typename iterator_traits<_ForwardIterator>::value_type
+ _ValueType;
+ // trivial types can have deleted assignment
+ const bool __assignable = is_copy_assignable<_ValueType>::value;
+
+ std::__uninitialized_default_1<__is_trivial(_ValueType)
+ && __assignable>::
+ __uninit_default(__first, __last);
+ }
+
+ // __uninitialized_default_n
+ // Fills [first, first + n) with value-initialized value_types.
+ template<typename _ForwardIterator, typename _Size>
+ inline _ForwardIterator
+ __uninitialized_default_n(_ForwardIterator __first, _Size __n)
+ {
+ typedef typename iterator_traits<_ForwardIterator>::value_type
+ _ValueType;
+ // See uninitialized_fill_n for the conditions for using std::fill_n.
+ constexpr bool __can_fill
+ = __and_<is_integral<_Size>, is_copy_assignable<_ValueType>>::value;
+
+ return __uninitialized_default_n_1<__is_trivial(_ValueType)
+ && __can_fill>::
+ __uninit_default_n(__first, __n);
+ }
+
+
+ // __uninitialized_default_a
+ // Fills [first, last) with value_types constructed by the allocator
+ // alloc, with no arguments passed to the construct call.
+ template<typename _ForwardIterator, typename _Allocator>
+ void
+ __uninitialized_default_a(_ForwardIterator __first,
+ _ForwardIterator __last,
+ _Allocator& __alloc)
+ {
+ _ForwardIterator __cur = __first;
+ __try
+ {
+ typedef __gnu_cxx::__alloc_traits<_Allocator> __traits;
+ for (; __cur != __last; ++__cur)
+ __traits::construct(__alloc, std::__addressof(*__cur));
+ }
+ __catch(...)
+ {
+ std::_Destroy(__first, __cur, __alloc);
+ __throw_exception_again;
+ }
+ }
+
+ template<typename _ForwardIterator, typename _Tp>
+ inline void
+ __uninitialized_default_a(_ForwardIterator __first,
+ _ForwardIterator __last,
+ allocator<_Tp>&)
+ { std::__uninitialized_default(__first, __last); }
+
+
+ // __uninitialized_default_n_a
+ // Fills [first, first + n) with value_types constructed by the allocator
+ // alloc, with no arguments passed to the construct call.
+ template<typename _ForwardIterator, typename _Size, typename _Allocator>
+ _ForwardIterator
+ __uninitialized_default_n_a(_ForwardIterator __first, _Size __n,
+ _Allocator& __alloc)
+ {
+ _ForwardIterator __cur = __first;
+ __try
+ {
+ typedef __gnu_cxx::__alloc_traits<_Allocator> __traits;
+ for (; __n > 0; --__n, (void) ++__cur)
+ __traits::construct(__alloc, std::__addressof(*__cur));
+ return __cur;
+ }
+ __catch(...)
+ {
+ std::_Destroy(__first, __cur, __alloc);
+ __throw_exception_again;
+ }
+ }
+
+ // __uninitialized_default_n_a specialization for std::allocator,
+ // which ignores the allocator and value-initializes the elements.
+ template<typename _ForwardIterator, typename _Size, typename _Tp>
+ inline _ForwardIterator
+ __uninitialized_default_n_a(_ForwardIterator __first, _Size __n,
+ allocator<_Tp>&)
+ { return std::__uninitialized_default_n(__first, __n); }
+
+ template<bool _TrivialValueType>
+ struct __uninitialized_default_novalue_1
+ {
+ template<typename _ForwardIterator>
+ static void
+ __uninit_default_novalue(_ForwardIterator __first,
+ _ForwardIterator __last)
+ {
+ _ForwardIterator __cur = __first;
+ __try
+ {
+ for (; __cur != __last; ++__cur)
+ std::_Construct_novalue(std::__addressof(*__cur));
+ }
+ __catch(...)
+ {
+ std::_Destroy(__first, __cur);
+ __throw_exception_again;
+ }
+ }
+ };
+
+ template<>
+ struct __uninitialized_default_novalue_1<true>
+ {
+ template<typename _ForwardIterator>
+ static void
+ __uninit_default_novalue(_ForwardIterator __first,
+ _ForwardIterator __last)
+ {
+ }
+ };
+
+ template<bool _TrivialValueType>
+ struct __uninitialized_default_novalue_n_1
+ {
+ template<typename _ForwardIterator, typename _Size>
+ static _ForwardIterator
+ __uninit_default_novalue_n(_ForwardIterator __first, _Size __n)
+ {
+ _ForwardIterator __cur = __first;
+ __try
+ {
+ for (; __n > 0; --__n, (void) ++__cur)
+ std::_Construct_novalue(std::__addressof(*__cur));
+ return __cur;
+ }
+ __catch(...)
+ {
+ std::_Destroy(__first, __cur);
+ __throw_exception_again;
+ }
+ }
+ };
+
+ template<>
+ struct __uninitialized_default_novalue_n_1<true>
+ {
+ template<typename _ForwardIterator, typename _Size>
+ static _ForwardIterator
+ __uninit_default_novalue_n(_ForwardIterator __first, _Size __n)
+ { return std::next(__first, __n); }
+ };
+
+ // __uninitialized_default_novalue
+ // Fills [first, last) with default-initialized value_types.
+ template<typename _ForwardIterator>
+ inline void
+ __uninitialized_default_novalue(_ForwardIterator __first,
+ _ForwardIterator __last)
+ {
+ typedef typename iterator_traits<_ForwardIterator>::value_type
+ _ValueType;
+
+ std::__uninitialized_default_novalue_1<
+ is_trivially_default_constructible<_ValueType>::value>::
+ __uninit_default_novalue(__first, __last);
+ }
+
+ // __uninitialized_default_novalue_n
+ // Fills [first, first + n) with default-initialized value_types.
+ template<typename _ForwardIterator, typename _Size>
+ inline _ForwardIterator
+ __uninitialized_default_novalue_n(_ForwardIterator __first, _Size __n)
+ {
+ typedef typename iterator_traits<_ForwardIterator>::value_type
+ _ValueType;
+
+ return __uninitialized_default_novalue_n_1<
+ is_trivially_default_constructible<_ValueType>::value>::
+ __uninit_default_novalue_n(__first, __n);
+ }
+
+ template<typename _InputIterator, typename _Size,
+ typename _ForwardIterator>
+ _ForwardIterator
+ __uninitialized_copy_n(_InputIterator __first, _Size __n,
+ _ForwardIterator __result, input_iterator_tag)
+ {
+ _ForwardIterator __cur = __result;
+ __try
+ {
+ for (; __n > 0; --__n, (void) ++__first, ++__cur)
+ std::_Construct(std::__addressof(*__cur), *__first);
+ return __cur;
+ }
+ __catch(...)
+ {
+ std::_Destroy(__result, __cur);
+ __throw_exception_again;
+ }
+ }
+
+ template<typename _RandomAccessIterator, typename _Size,
+ typename _ForwardIterator>
+ inline _ForwardIterator
+ __uninitialized_copy_n(_RandomAccessIterator __first, _Size __n,
+ _ForwardIterator __result,
+ random_access_iterator_tag)
+ { return std::uninitialized_copy(__first, __first + __n, __result); }
+
+ template<typename _InputIterator, typename _Size,
+ typename _ForwardIterator>
+ pair<_InputIterator, _ForwardIterator>
+ __uninitialized_copy_n_pair(_InputIterator __first, _Size __n,
+ _ForwardIterator __result, input_iterator_tag)
+ {
+ _ForwardIterator __cur = __result;
+ __try
+ {
+ for (; __n > 0; --__n, (void) ++__first, ++__cur)
+ std::_Construct(std::__addressof(*__cur), *__first);
+ return {__first, __cur};
+ }
+ __catch(...)
+ {
+ std::_Destroy(__result, __cur);
+ __throw_exception_again;
+ }
+ }
+
+ template<typename _RandomAccessIterator, typename _Size,
+ typename _ForwardIterator>
+ inline pair<_RandomAccessIterator, _ForwardIterator>
+ __uninitialized_copy_n_pair(_RandomAccessIterator __first, _Size __n,
+ _ForwardIterator __result,
+ random_access_iterator_tag)
+ {
+ auto __second_res = uninitialized_copy(__first, __first + __n, __result);
+ auto __first_res = std::next(__first, __n);
+ return {__first_res, __second_res};
+ }
+
+ /// @endcond
+
+ /**
+ * @brief Copies the range [first,first+n) into result.
+ * @param __first An input iterator.
+ * @param __n The number of elements to copy.
+ * @param __result An output iterator.
+ * @return __result + __n
+ *
+ * Like copy_n(), but does not require an initialized output range.
+ */
+ template<typename _InputIterator, typename _Size, typename _ForwardIterator>
+ inline _ForwardIterator
+ uninitialized_copy_n(_InputIterator __first, _Size __n,
+ _ForwardIterator __result)
+ { return std::__uninitialized_copy_n(__first, __n, __result,
+ std::__iterator_category(__first)); }
+
+ /// @cond undocumented
+ template<typename _InputIterator, typename _Size, typename _ForwardIterator>
+ inline pair<_InputIterator, _ForwardIterator>
+ __uninitialized_copy_n_pair(_InputIterator __first, _Size __n,
+ _ForwardIterator __result)
+ {
+ return
+ std::__uninitialized_copy_n_pair(__first, __n, __result,
+ std::__iterator_category(__first));
+ }
+ /// @endcond
+#endif
+
+#if __cplusplus >= 201703L
+# define __cpp_lib_raw_memory_algorithms 201606L
+
+ /**
+ * @brief Default-initializes objects in the range [first,last).
+ * @param __first A forward iterator.
+ * @param __last A forward iterator.
+ */
+ template <typename _ForwardIterator>
+ inline void
+ uninitialized_default_construct(_ForwardIterator __first,
+ _ForwardIterator __last)
+ {
+ __uninitialized_default_novalue(__first, __last);
+ }
+
+ /**
+ * @brief Default-initializes objects in the range [first,first+count).
+ * @param __first A forward iterator.
+ * @param __count The number of objects to construct.
+ * @return __first + __count
+ */
+ template <typename _ForwardIterator, typename _Size>
+ inline _ForwardIterator
+ uninitialized_default_construct_n(_ForwardIterator __first, _Size __count)
+ {
+ return __uninitialized_default_novalue_n(__first, __count);
+ }
+
+ /**
+ * @brief Value-initializes objects in the range [first,last).
+ * @param __first A forward iterator.
+ * @param __last A forward iterator.
+ */
+ template <typename _ForwardIterator>
+ inline void
+ uninitialized_value_construct(_ForwardIterator __first,
+ _ForwardIterator __last)
+ {
+ return __uninitialized_default(__first, __last);
+ }
+
+ /**
+ * @brief Value-initializes objects in the range [first,first+count).
+ * @param __first A forward iterator.
+ * @param __count The number of objects to construct.
+ * @return __result + __count
+ */
+ template <typename _ForwardIterator, typename _Size>
+ inline _ForwardIterator
+ uninitialized_value_construct_n(_ForwardIterator __first, _Size __count)
+ {
+ return __uninitialized_default_n(__first, __count);
+ }
+
+ /**
+ * @brief Move-construct from the range [first,last) into result.
+ * @param __first An input iterator.
+ * @param __last An input iterator.
+ * @param __result An output iterator.
+ * @return __result + (__first - __last)
+ */
+ template <typename _InputIterator, typename _ForwardIterator>
+ inline _ForwardIterator
+ uninitialized_move(_InputIterator __first, _InputIterator __last,
+ _ForwardIterator __result)
+ {
+ return std::uninitialized_copy
+ (_GLIBCXX_MAKE_MOVE_ITERATOR(__first),
+ _GLIBCXX_MAKE_MOVE_ITERATOR(__last), __result);
+ }
+
+ /**
+ * @brief Move-construct from the range [first,first+count) into result.
+ * @param __first An input iterator.
+ * @param __count The number of objects to initialize.
+ * @param __result An output iterator.
+ * @return __result + __count
+ */
+ template <typename _InputIterator, typename _Size, typename _ForwardIterator>
+ inline pair<_InputIterator, _ForwardIterator>
+ uninitialized_move_n(_InputIterator __first, _Size __count,
+ _ForwardIterator __result)
+ {
+ auto __res = std::__uninitialized_copy_n_pair
+ (_GLIBCXX_MAKE_MOVE_ITERATOR(__first),
+ __count, __result);
+ return {__res.first.base(), __res.second};
+ }
+#endif // C++17
+
+#if __cplusplus >= 201103L
+ /// @cond undocumented
+
+ template<typename _Tp, typename _Up, typename _Allocator>
+ inline void
+ __relocate_object_a(_Tp* __restrict __dest, _Up* __restrict __orig,
+ _Allocator& __alloc)
+ noexcept(noexcept(std::allocator_traits<_Allocator>::construct(__alloc,
+ __dest, std::move(*__orig)))
+ && noexcept(std::allocator_traits<_Allocator>::destroy(
+ __alloc, std::__addressof(*__orig))))
+ {
+ typedef std::allocator_traits<_Allocator> __traits;
+ __traits::construct(__alloc, __dest, std::move(*__orig));
+ __traits::destroy(__alloc, std::__addressof(*__orig));
+ }
+
+ // This class may be specialized for specific types.
+ // Also known as is_trivially_relocatable.
+ template<typename _Tp, typename = void>
+ struct __is_bitwise_relocatable
+ : is_trivial<_Tp> { };
+
+ template <typename _Tp, typename _Up>
+ inline __enable_if_t<std::__is_bitwise_relocatable<_Tp>::value, _Tp*>
+ __relocate_a_1(_Tp* __first, _Tp* __last,
+ _Tp* __result, allocator<_Up>&) noexcept
+ {
+ ptrdiff_t __count = __last - __first;
+ if (__count > 0)
+ __builtin_memmove(__result, __first, __count * sizeof(_Tp));
+ return __result + __count;
+ }
+
+ template <typename _InputIterator, typename _ForwardIterator,
+ typename _Allocator>
+ inline _ForwardIterator
+ __relocate_a_1(_InputIterator __first, _InputIterator __last,
+ _ForwardIterator __result, _Allocator& __alloc)
+ noexcept(noexcept(std::__relocate_object_a(std::addressof(*__result),
+ std::addressof(*__first),
+ __alloc)))
+ {
+ typedef typename iterator_traits<_InputIterator>::value_type
+ _ValueType;
+ typedef typename iterator_traits<_ForwardIterator>::value_type
+ _ValueType2;
+ static_assert(std::is_same<_ValueType, _ValueType2>::value,
+ "relocation is only possible for values of the same type");
+ _ForwardIterator __cur = __result;
+ for (; __first != __last; ++__first, (void)++__cur)
+ std::__relocate_object_a(std::__addressof(*__cur),
+ std::__addressof(*__first), __alloc);
+ return __cur;
+ }
+
+ template <typename _InputIterator, typename _ForwardIterator,
+ typename _Allocator>
+ inline _ForwardIterator
+ __relocate_a(_InputIterator __first, _InputIterator __last,
+ _ForwardIterator __result, _Allocator& __alloc)
+ noexcept(noexcept(__relocate_a_1(std::__niter_base(__first),
+ std::__niter_base(__last),
+ std::__niter_base(__result), __alloc)))
+ {
+ return __relocate_a_1(std::__niter_base(__first),
+ std::__niter_base(__last),
+ std::__niter_base(__result), __alloc);
+ }
+
+ /// @endcond
+#endif
+
+ // @} group memory
-#endif /* _CPP_BITS_STL_UNINITIALIZED_H */
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
-// Local Variables:
-// mode:C++
-// End:
+#endif /* _STL_UNINITIALIZED_H */
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