stl_uninitialized.h
Go to the documentation of this file.
// Raw memory manipulators -*- C++ -*-
// Copyright (C) 2001-2014 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 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// 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.
// 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/>.
/*
*
* Copyright (c) 1994
* Hewlett-Packard Company
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Hewlett-Packard Company makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
*
* Copyright (c) 1996,1997
* Silicon Graphics Computer Systems, Inc.
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Silicon Graphics makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*/
/** @file bits/stl_uninitialized.h
* This is an internal header file, included by other library headers.
* Do not attempt to use it directly. @headername{memory}
*/
#ifndef _STL_UNINITIALIZED_H
#define _STL_UNINITIALIZED_H 1
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
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, ++__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); }
};
/**
* @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)
*
* Like copy(), but does not require an initialized output range.
*/
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 assignment
typedef typename iterator_traits<_InputIterator>::reference _RefType;
const bool __assignable = is_assignable<_ValueType1, _RefType>::value;
#endif
return std::__uninitialized_copy<__is_trivial(_ValueType1)
&& __is_trivial(_ValueType2)
&& __assignable>::
__uninit_copy(__first, __last, __result);
}
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); }
};
/**
* @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.
* @return Nothing.
*
* Like fill(), but does not require an initialized output range.
*/
template<typename _ForwardIterator, typename _Tp>
inline void
uninitialized_fill(_ForwardIterator __first, _ForwardIterator __last,
const _Tp& __x)
{
typedef typename iterator_traits<_ForwardIterator>::value_type
_ValueType;
#if __cplusplus < 201103L
const bool __assignable = true;
#else
// trivial types can have deleted assignment
const bool __assignable = is_copy_assignable<_ValueType>::value;
#endif
std::__uninitialized_fill<__is_trivial(_ValueType) && __assignable>::
__uninit_fill(__first, __last, __x);
}
template<bool _TrivialValueType>
struct __uninitialized_fill_n
{
template<typename _ForwardIterator, typename _Size, typename _Tp>
static void
__uninit_fill_n(_ForwardIterator __first, _Size __n,
const _Tp& __x)
{
_ForwardIterator __cur = __first;
__try
{
for (; __n > 0; --__n, ++__cur)
std::_Construct(std::__addressof(*__cur), __x);
}
__catch(...)
{
std::_Destroy(__first, __cur);
__throw_exception_again;
}
}
};
template<>
struct __uninitialized_fill_n<true>
{
template<typename _ForwardIterator, typename _Size, typename _Tp>
static void
__uninit_fill_n(_ForwardIterator __first, _Size __n,
const _Tp& __x)
{ std::fill_n(__first, __n, __x); }
};
/**
* @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 Nothing.
*
* Like fill_n(), but does not require an initialized output range.
*/
template<typename _ForwardIterator, typename _Size, typename _Tp>
inline void
uninitialized_fill_n(_ForwardIterator __first, _Size __n, const _Tp& __x)
{
typedef typename iterator_traits<_ForwardIterator>::value_type
_ValueType;
#if __cplusplus < 201103L
const bool __assignable = true;
#else
// trivial types can have deleted assignment
const bool __assignable = is_copy_assignable<_ValueType>::value;
#endif
std::__uninitialized_fill_n<__is_trivial(_ValueType) && __assignable>::
__uninit_fill_n(__first, __n, __x);
}
// 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, ++__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>
void
__uninitialized_fill_n_a(_ForwardIterator __first, _Size __n,
const _Tp& __x, _Allocator& __alloc)
{
_ForwardIterator __cur = __first;
__try
{
typedef __gnu_cxx::__alloc_traits<_Allocator> __traits;
for (; __n > 0; --__n, ++__cur)
__traits::construct(__alloc, std::__addressof(*__cur), __x);
}
__catch(...)
{
std::_Destroy(__first, __cur, __alloc);
__throw_exception_again;
}
}
template<typename _ForwardIterator, typename _Size, typename _Tp,
typename _Tp2>
inline void
__uninitialized_fill_n_a(_ForwardIterator __first, _Size __n,
const _Tp& __x, allocator<_Tp2>&)
{ std::uninitialized_fill_n(__first, __n, __x); }
// 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
// move [first2, last2) into
// [result, result + (last1 - first1) + (last2 - first2)).
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)
{
_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_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 _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
{
return std::__uninitialized_move_a(__first, __last, __mid, __alloc);
}
__catch(...)
{
std::_Destroy(__result, __mid, __alloc);
__throw_exception_again;
}
}
// __uninitialized_move_fill
// Moves [first1, last1) into [first2, first2 + (last1 - first1)), and
// fills [first2 + (last1 - first1), last2) with x.
template<typename _InputIterator, typename _ForwardIterator, typename _Tp,
typename _Allocator>
inline void
__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(...)
{
std::_Destroy(__first2, __mid2, __alloc);
__throw_exception_again;
}
}
#if __cplusplus >= 201103L
// 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)
{
typedef typename iterator_traits<_ForwardIterator>::value_type
_ValueType;
std::fill(__first, __last, _ValueType());
}
};
template<bool _TrivialValueType>
struct __uninitialized_default_n_1
{
template<typename _ForwardIterator, typename _Size>
static void
__uninit_default_n(_ForwardIterator __first, _Size __n)
{
_ForwardIterator __cur = __first;
__try
{
for (; __n > 0; --__n, ++__cur)
std::_Construct(std::__addressof(*__cur));
}
__catch(...)
{
std::_Destroy(__first, __cur);
__throw_exception_again;
}
}
};
template<>
struct __uninitialized_default_n_1<true>
{
template<typename _ForwardIterator, typename _Size>
static void
__uninit_default_n(_ForwardIterator __first, _Size __n)
{
typedef typename iterator_traits<_ForwardIterator>::value_type
_ValueType;
std::fill_n(__first, __n, _ValueType());
}
};
// __uninitialized_default
// Fills [first, last) with std::distance(first, last) default
// constructed value_types(s).
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 n default constructed value_type(s).
template<typename _ForwardIterator, typename _Size>
inline void
__uninitialized_default_n(_ForwardIterator __first, _Size __n)
{
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_n_1<__is_trivial(_ValueType)
&& __assignable>::
__uninit_default_n(__first, __n);
}
// __uninitialized_default_a
// Fills [first, last) with std::distance(first, last) default
// constructed value_types(s), constructed with the allocator alloc.
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 n default constructed value_types(s),
// constructed with the allocator alloc.
template<typename _ForwardIterator, typename _Size, typename _Allocator>
void
__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, ++__cur)
__traits::construct(__alloc, std::__addressof(*__cur));
}
__catch(...)
{
std::_Destroy(__first, __cur, __alloc);
__throw_exception_again;
}
}
template<typename _ForwardIterator, typename _Size, typename _Tp>
inline void
__uninitialized_default_n_a(_ForwardIterator __first, _Size __n,
allocator<_Tp>&)
{ std::__uninitialized_default_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, ++__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); }
/**
* @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)); }
#endif
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
#endif /* _STL_UNINITIALIZED_H */
std::uninitialized_copy_n
_ForwardIterator uninitialized_copy_n(_InputIterator __first, _Size __n, _ForwardIterator __result)
Copies the range [first,first+n) into result.
Definition: stl_uninitialized.h:673
__gnu_cxx::__alloc_traits
Uniform interface to C++98 and C++0x allocators.
Definition: ext/alloc_traits.h:95
std::__addressof
_Tp * __addressof(_Tp &__r) noexcept
Same as C++11 std::addressof.
Definition: move.h:47
std::uninitialized_fill
void uninitialized_fill(_ForwardIterator __first, _ForwardIterator __last, const _Tp &__x)
Copies the value x into the range [first,last).
Definition: stl_uninitialized.h:172
std::__iterator_category
iterator_traits< _Iter >::iterator_category __iterator_category(const _Iter &)
Definition: stl_iterator_base_types.h:201
std::_Destroy
void _Destroy(_Tp *__pointer)
Definition: stl_construct.h:92
std::_Construct
void _Construct(_T1 *__p, _Args &&...__args)
Definition: stl_construct.h:74
std::fill_n
_OI fill_n(_OI __first, _Size __n, const _Tp &__value)
Fills the range [first,first+n) with copies of value.
Definition: stl_algobase.h:792
std::uninitialized_fill_n
void uninitialized_fill_n(_ForwardIterator __first, _Size __n, const _Tp &__x)
Copies the value x into the range [first,first+n).
Definition: stl_uninitialized.h:232
std::uninitialized_copy
_ForwardIterator uninitialized_copy(_InputIterator __first, _InputIterator __last, _ForwardIterator __result)
Copies the range [first,last) into result.
Definition: stl_uninitialized.h:107