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798ec8436de05f4422d20b7c5d24f797136cc470
android_external_libcxx/include/__hash_table
Duncan P. N. Exon Smith 798ec8436d unord: Extract key to avoid preemptive mallocs in insert/emplace 
unordered_set::emplace and unordered_map::emplace construct a node, then
try to insert it.  If insertion fails, the node gets deleted.

To avoid this unnecessary malloc traffic, check to see if the argument
to emplace has the appropriate key_type.  If so, we can use that key
directly and delay the malloc until we're sure we're inserting something
new.

Test updates by Eric Fiselier, who rewrote the old allocation tests to
include the new cases.

There are two orthogonal future directions:

1. Apply the same optimization to set and map.

2. Extend the optimization to when the argument is not key_type, but can
   be converted to it without side effects.  Ideally, we could do this
   whenever key_type is trivially destructible and the argument is
   trivially convertible to key_type, but in practise the relevant type
   traits "blow up sometimes".  At least, we should catch a few simple
   cases (such as when both are primitive types).

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@263746 91177308-0d34-0410-b5e6-96231b3b80d8
2016-03-17 20:45:20 +00:00

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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP__HASH_TABLE
#define _LIBCPP__HASH_TABLE
#include <__config>
#include <initializer_list>
#include <memory>
#include <iterator>
#include <algorithm>
#include <cmath>
#include <utility>
#include <__undef_min_max>
#include <__undef___deallocate>
#include <__debug>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
#ifndef _LIBCPP_CXX03_LANG
template <class _Key, class _Tp>
union __hash_value_type;
#else
template <class _Key, class _Tp>
struct __hash_value_type;
#endif
#ifndef _LIBCPP_CXX03_LANG
template <class _Tp>
struct __is_hash_value_type_imp : false_type {};
template <class _Key, class _Value>
struct __is_hash_value_type_imp<__hash_value_type<_Key, _Value>> : true_type {};
template <class ..._Args>
struct __is_hash_value_type : false_type {};
template <class _One>
struct __is_hash_value_type<_One> : __is_hash_value_type_imp<typename __uncvref<_One>::type> {};
#endif
_LIBCPP_FUNC_VIS
size_t __next_prime(size_t __n);
template <class _NodePtr>
struct __hash_node_base
{
typedef __hash_node_base __first_node;
_NodePtr __next_;
_LIBCPP_INLINE_VISIBILITY __hash_node_base() _NOEXCEPT : __next_(nullptr) {}
};
template <class _Tp, class _VoidPtr>
struct __hash_node
: public __hash_node_base
<
typename __rebind_pointer<_VoidPtr, __hash_node<_Tp, _VoidPtr> >::type
>
{
typedef _Tp __node_value_type;
size_t __hash_;
__node_value_type __value_;
};
inline _LIBCPP_INLINE_VISIBILITY
bool
__is_hash_power2(size_t __bc)
{
return __bc > 2 && !(__bc & (__bc - 1));
}
inline _LIBCPP_INLINE_VISIBILITY
size_t
__constrain_hash(size_t __h, size_t __bc)
{
return !(__bc & (__bc - 1)) ? __h & (__bc - 1) : __h % __bc;
}
inline _LIBCPP_INLINE_VISIBILITY
size_t
__next_hash_pow2(size_t __n)
{
return size_t(1) << (std::numeric_limits<size_t>::digits - __clz(__n-1));
}
#ifndef _LIBCPP_CXX03_LANG
struct __extract_key_fail_tag {};
struct __extract_key_self_tag {};
struct __extract_key_first_tag {};
template <class _ValTy, class _Key,
class _RawValTy = typename __unconstref<_ValTy>::type>
struct __can_extract_key
: conditional<is_same<_RawValTy, _Key>::value, __extract_key_self_tag,
__extract_key_fail_tag>::type {};
template <class _Pair, class _Key, class _First, class _Second>
struct __can_extract_key<_Pair, _Key, pair<_First, _Second>>
: conditional<is_same<typename remove_const<_First>::type, _Key>::value,
__extract_key_first_tag, __extract_key_fail_tag>::type {};
#endif
template <class _Tp, class _Hash, class _Equal, class _Alloc> class __hash_table;
template <class _NodePtr> class _LIBCPP_TYPE_VIS_ONLY __hash_iterator;
template <class _ConstNodePtr> class _LIBCPP_TYPE_VIS_ONLY __hash_const_iterator;
template <class _NodePtr> class _LIBCPP_TYPE_VIS_ONLY __hash_local_iterator;
template <class _ConstNodePtr> class _LIBCPP_TYPE_VIS_ONLY __hash_const_local_iterator;
template <class _HashIterator> class _LIBCPP_TYPE_VIS_ONLY __hash_map_iterator;
template <class _HashIterator> class _LIBCPP_TYPE_VIS_ONLY __hash_map_const_iterator;
template <class _Tp>
struct __hash_key_value_types {
static_assert(!is_reference<_Tp>::value && !is_const<_Tp>::value, "");
typedef _Tp key_type;
typedef _Tp __node_value_type;
typedef _Tp __container_value_type;
static const bool __is_map = false;
_LIBCPP_INLINE_VISIBILITY
static key_type const& __get_key(_Tp const& __v) {
return __v;
}
_LIBCPP_INLINE_VISIBILITY
static __container_value_type const& __get_value(__node_value_type const& __v) {
return __v;
}
_LIBCPP_INLINE_VISIBILITY
static __container_value_type* __get_ptr(__node_value_type& __n) {
return _VSTD::addressof(__n);
}
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_INLINE_VISIBILITY
static __container_value_type&& __move(__node_value_type& __v) {
return _VSTD::move(__v);
}
#endif
};
template <class _Key, class _Tp>
struct __hash_key_value_types<__hash_value_type<_Key, _Tp> > {
typedef _Key key_type;
typedef _Tp mapped_type;
typedef __hash_value_type<_Key, _Tp> __node_value_type;
typedef pair<const _Key, _Tp> __container_value_type;
typedef pair<_Key, _Tp> __nc_value_type;
typedef __container_value_type __map_value_type;
static const bool __is_map = true;
_LIBCPP_INLINE_VISIBILITY
static key_type const& __get_key(__container_value_type const& __v) {
return __v.first;
}
template <class _Up>
_LIBCPP_INLINE_VISIBILITY
static typename enable_if<__is_same_uncvref<_Up, __node_value_type>::value,
__container_value_type const&>::type
__get_value(_Up& __t) {
return __t.__cc;
}
template <class _Up>
_LIBCPP_INLINE_VISIBILITY
static typename enable_if<__is_same_uncvref<_Up, __container_value_type>::value,
__container_value_type const&>::type
__get_value(_Up& __t) {
return __t;
}
_LIBCPP_INLINE_VISIBILITY
static __container_value_type* __get_ptr(__node_value_type& __n) {
return _VSTD::addressof(__n.__cc);
}
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_INLINE_VISIBILITY
static __nc_value_type&& __move(__node_value_type& __v) {
return _VSTD::move(__v.__nc);
}
#endif
};
template <class _Tp, class _AllocPtr, class _KVTypes = __hash_key_value_types<_Tp>,
bool = _KVTypes::__is_map>
struct __hash_map_pointer_types {};
template <class _Tp, class _AllocPtr, class _KVTypes>
struct __hash_map_pointer_types<_Tp, _AllocPtr, _KVTypes, true> {
typedef typename _KVTypes::__map_value_type _Mv;
typedef typename __rebind_pointer<_AllocPtr, _Mv>::type
__map_value_type_pointer;
typedef typename __rebind_pointer<_AllocPtr, const _Mv>::type
__const_map_value_type_pointer;
};
template <class _NodePtr, class _NodeT = typename pointer_traits<_NodePtr>::element_type>
struct __hash_node_types;
template <class _NodePtr, class _Tp, class _VoidPtr>
struct __hash_node_types<_NodePtr, __hash_node<_Tp, _VoidPtr> >
: public __hash_key_value_types<_Tp>, __hash_map_pointer_types<_Tp, _VoidPtr>
{
typedef __hash_key_value_types<_Tp> __base;
public:
typedef ptrdiff_t difference_type;
typedef size_t size_type;
typedef typename __rebind_pointer<_NodePtr, void>::type __void_pointer;
typedef typename pointer_traits<_NodePtr>::element_type __node_type;
typedef _NodePtr __node_pointer;
typedef __hash_node_base<__node_pointer> __node_base_type;
typedef typename __rebind_pointer<_NodePtr, __node_base_type>::type
__node_base_pointer;
typedef _Tp __node_value_type;
typedef typename __rebind_pointer<_VoidPtr, __node_value_type>::type
__node_value_type_pointer;
typedef typename __rebind_pointer<_VoidPtr, const __node_value_type>::type
__const_node_value_type_pointer;
private:
static_assert(!is_const<__node_type>::value,
"_NodePtr should never be a pointer to const");
static_assert((is_same<typename pointer_traits<_VoidPtr>::element_type, void>::value),
"_VoidPtr does not point to unqualified void type");
static_assert((is_same<typename __rebind_pointer<_VoidPtr, __node_type>::type,
_NodePtr>::value), "_VoidPtr does not rebind to _NodePtr.");
};
template <class _HashIterator>
struct __hash_node_types_from_iterator;
template <class _NodePtr>
struct __hash_node_types_from_iterator<__hash_iterator<_NodePtr> > : __hash_node_types<_NodePtr> {};
template <class _NodePtr>
struct __hash_node_types_from_iterator<__hash_const_iterator<_NodePtr> > : __hash_node_types<_NodePtr> {};
template <class _NodePtr>
struct __hash_node_types_from_iterator<__hash_local_iterator<_NodePtr> > : __hash_node_types<_NodePtr> {};
template <class _NodePtr>
struct __hash_node_types_from_iterator<__hash_const_local_iterator<_NodePtr> > : __hash_node_types<_NodePtr> {};
template <class _NodeValueTp, class _VoidPtr>
struct __make_hash_node_types {
typedef __hash_node<_NodeValueTp, _VoidPtr> _NodeTp;
typedef typename __rebind_pointer<_VoidPtr, _NodeTp>::type _NodePtr;
typedef __hash_node_types<_NodePtr> type;
};
template <class _NodePtr>
class _LIBCPP_TYPE_VIS_ONLY __hash_iterator
{
typedef __hash_node_types<_NodePtr> _NodeTypes;
typedef _NodePtr __node_pointer;
__node_pointer __node_;
public:
typedef forward_iterator_tag iterator_category;
typedef typename _NodeTypes::__node_value_type value_type;
typedef typename _NodeTypes::difference_type difference_type;
typedef value_type& reference;
typedef typename _NodeTypes::__node_value_type_pointer pointer;
_LIBCPP_INLINE_VISIBILITY __hash_iterator() _NOEXCEPT
#if _LIBCPP_STD_VER > 11
: __node_(nullptr)
#endif
{
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->__insert_i(this);
#endif
}
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
__hash_iterator(const __hash_iterator& __i)
: __node_(__i.__node_)
{
__get_db()->__iterator_copy(this, &__i);
}
_LIBCPP_INLINE_VISIBILITY
~__hash_iterator()
{
__get_db()->__erase_i(this);
}
_LIBCPP_INLINE_VISIBILITY
__hash_iterator& operator=(const __hash_iterator& __i)
{
if (this != &__i)
{
__get_db()->__iterator_copy(this, &__i);
__node_ = __i.__node_;
}
return *this;
}
#endif // _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
reference operator*() const
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to dereference a non-dereferenceable unordered container iterator");
#endif
return __node_->__value_;
}
_LIBCPP_INLINE_VISIBILITY
pointer operator->() const
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to dereference a non-dereferenceable unordered container iterator");
#endif
return pointer_traits<pointer>::pointer_to(__node_->__value_);
}
_LIBCPP_INLINE_VISIBILITY
__hash_iterator& operator++()
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to increment non-incrementable unordered container iterator");
#endif
__node_ = __node_->__next_;
return *this;
}
_LIBCPP_INLINE_VISIBILITY
__hash_iterator operator++(int)
{
__hash_iterator __t(*this);
++(*this);
return __t;
}
friend _LIBCPP_INLINE_VISIBILITY
bool operator==(const __hash_iterator& __x, const __hash_iterator& __y)
{
return __x.__node_ == __y.__node_;
}
friend _LIBCPP_INLINE_VISIBILITY
bool operator!=(const __hash_iterator& __x, const __hash_iterator& __y)
{return !(__x == __y);}
private:
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
__hash_iterator(__node_pointer __node, const void* __c) _NOEXCEPT
: __node_(__node)
{
__get_db()->__insert_ic(this, __c);
}
#else
_LIBCPP_INLINE_VISIBILITY
__hash_iterator(__node_pointer __node) _NOEXCEPT
: __node_(__node)
{}
#endif
template <class, class, class, class> friend class __hash_table;
template <class> friend class _LIBCPP_TYPE_VIS_ONLY __hash_const_iterator;
template <class> friend class _LIBCPP_TYPE_VIS_ONLY __hash_map_iterator;
template <class, class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY unordered_map;
template <class, class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY unordered_multimap;
};
template <class _NodePtr>
class _LIBCPP_TYPE_VIS_ONLY __hash_const_iterator
{
static_assert(!is_const<typename pointer_traits<_NodePtr>::element_type>::value, "");
typedef __hash_node_types<_NodePtr> _NodeTypes;
typedef _NodePtr __node_pointer;
__node_pointer __node_;
public:
typedef __hash_iterator<_NodePtr> __non_const_iterator;
typedef forward_iterator_tag iterator_category;
typedef typename _NodeTypes::__node_value_type value_type;
typedef typename _NodeTypes::difference_type difference_type;
typedef const value_type& reference;
typedef typename _NodeTypes::__const_node_value_type_pointer pointer;
_LIBCPP_INLINE_VISIBILITY __hash_const_iterator() _NOEXCEPT
#if _LIBCPP_STD_VER > 11
: __node_(nullptr)
#endif
{
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->__insert_i(this);
#endif
}
_LIBCPP_INLINE_VISIBILITY
__hash_const_iterator(const __non_const_iterator& __x) _NOEXCEPT
: __node_(__x.__node_)
{
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->__iterator_copy(this, &__x);
#endif
}
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
__hash_const_iterator(const __hash_const_iterator& __i)
: __node_(__i.__node_)
{
__get_db()->__iterator_copy(this, &__i);
}
_LIBCPP_INLINE_VISIBILITY
~__hash_const_iterator()
{
__get_db()->__erase_i(this);
}
_LIBCPP_INLINE_VISIBILITY
__hash_const_iterator& operator=(const __hash_const_iterator& __i)
{
if (this != &__i)
{
__get_db()->__iterator_copy(this, &__i);
__node_ = __i.__node_;
}
return *this;
}
#endif // _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
reference operator*() const
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to dereference a non-dereferenceable unordered container const_iterator");
#endif
return __node_->__value_;
}
_LIBCPP_INLINE_VISIBILITY
pointer operator->() const
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to dereference a non-dereferenceable unordered container const_iterator");
#endif
return pointer_traits<pointer>::pointer_to(__node_->__value_);
}
_LIBCPP_INLINE_VISIBILITY
__hash_const_iterator& operator++()
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to increment non-incrementable unordered container const_iterator");
#endif
__node_ = __node_->__next_;
return *this;
}
_LIBCPP_INLINE_VISIBILITY
__hash_const_iterator operator++(int)
{
__hash_const_iterator __t(*this);
++(*this);
return __t;
}
friend _LIBCPP_INLINE_VISIBILITY
bool operator==(const __hash_const_iterator& __x, const __hash_const_iterator& __y)
{
return __x.__node_ == __y.__node_;
}
friend _LIBCPP_INLINE_VISIBILITY
bool operator!=(const __hash_const_iterator& __x, const __hash_const_iterator& __y)
{return !(__x == __y);}
private:
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
__hash_const_iterator(__node_pointer __node, const void* __c) _NOEXCEPT
: __node_(__node)
{
__get_db()->__insert_ic(this, __c);
}
#else
_LIBCPP_INLINE_VISIBILITY
__hash_const_iterator(__node_pointer __node) _NOEXCEPT
: __node_(__node)
{}
#endif
template <class, class, class, class> friend class __hash_table;
template <class> friend class _LIBCPP_TYPE_VIS_ONLY __hash_map_const_iterator;
template <class, class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY unordered_map;
template <class, class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY unordered_multimap;
};
template <class _NodePtr>
class _LIBCPP_TYPE_VIS_ONLY __hash_local_iterator
{
typedef __hash_node_types<_NodePtr> _NodeTypes;
typedef _NodePtr __node_pointer;
__node_pointer __node_;
size_t __bucket_;
size_t __bucket_count_;
public:
typedef forward_iterator_tag iterator_category;
typedef typename _NodeTypes::__node_value_type value_type;
typedef typename _NodeTypes::difference_type difference_type;
typedef value_type& reference;
typedef typename _NodeTypes::__node_value_type_pointer pointer;
_LIBCPP_INLINE_VISIBILITY __hash_local_iterator() _NOEXCEPT
{
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->__insert_i(this);
#endif
}
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
__hash_local_iterator(const __hash_local_iterator& __i)
: __node_(__i.__node_),
__bucket_(__i.__bucket_),
__bucket_count_(__i.__bucket_count_)
{
__get_db()->__iterator_copy(this, &__i);
}
_LIBCPP_INLINE_VISIBILITY
~__hash_local_iterator()
{
__get_db()->__erase_i(this);
}
_LIBCPP_INLINE_VISIBILITY
__hash_local_iterator& operator=(const __hash_local_iterator& __i)
{
if (this != &__i)
{
__get_db()->__iterator_copy(this, &__i);
__node_ = __i.__node_;
__bucket_ = __i.__bucket_;
__bucket_count_ = __i.__bucket_count_;
}
return *this;
}
#endif // _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
reference operator*() const
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to dereference a non-dereferenceable unordered container local_iterator");
#endif
return __node_->__value_;
}
_LIBCPP_INLINE_VISIBILITY
pointer operator->() const
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to dereference a non-dereferenceable unordered container local_iterator");
#endif
return pointer_traits<pointer>::pointer_to(__node_->__value_);
}
_LIBCPP_INLINE_VISIBILITY
__hash_local_iterator& operator++()
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to increment non-incrementable unordered container local_iterator");
#endif
__node_ = __node_->__next_;
if (__node_ != nullptr && __constrain_hash(__node_->__hash_, __bucket_count_) != __bucket_)
__node_ = nullptr;
return *this;
}
_LIBCPP_INLINE_VISIBILITY
__hash_local_iterator operator++(int)
{
__hash_local_iterator __t(*this);
++(*this);
return __t;
}
friend _LIBCPP_INLINE_VISIBILITY
bool operator==(const __hash_local_iterator& __x, const __hash_local_iterator& __y)
{
return __x.__node_ == __y.__node_;
}
friend _LIBCPP_INLINE_VISIBILITY
bool operator!=(const __hash_local_iterator& __x, const __hash_local_iterator& __y)
{return !(__x == __y);}
private:
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
__hash_local_iterator(__node_pointer __node, size_t __bucket,
size_t __bucket_count, const void* __c) _NOEXCEPT
: __node_(__node),
__bucket_(__bucket),
__bucket_count_(__bucket_count)
{
__get_db()->__insert_ic(this, __c);
if (__node_ != nullptr)
__node_ = __node_->__next_;
}
#else
_LIBCPP_INLINE_VISIBILITY
__hash_local_iterator(__node_pointer __node, size_t __bucket,
size_t __bucket_count) _NOEXCEPT
: __node_(__node),
__bucket_(__bucket),
__bucket_count_(__bucket_count)
{
if (__node_ != nullptr)
__node_ = __node_->__next_;
}
#endif
template <class, class, class, class> friend class __hash_table;
template <class> friend class _LIBCPP_TYPE_VIS_ONLY __hash_const_local_iterator;
template <class> friend class _LIBCPP_TYPE_VIS_ONLY __hash_map_iterator;
};
template <class _ConstNodePtr>
class _LIBCPP_TYPE_VIS_ONLY __hash_const_local_iterator
{
typedef __hash_node_types<_ConstNodePtr> _NodeTypes;
typedef _ConstNodePtr __node_pointer;
__node_pointer __node_;
size_t __bucket_;
size_t __bucket_count_;
typedef pointer_traits<__node_pointer> __pointer_traits;
typedef typename __pointer_traits::element_type __node;
typedef typename remove_const<__node>::type __non_const_node;
typedef typename __rebind_pointer<__node_pointer, __non_const_node>::type
__non_const_node_pointer;
public:
typedef __hash_local_iterator<__non_const_node_pointer>
__non_const_iterator;
typedef forward_iterator_tag iterator_category;
typedef typename _NodeTypes::__node_value_type value_type;
typedef typename _NodeTypes::difference_type difference_type;
typedef const value_type& reference;
typedef typename _NodeTypes::__const_node_value_type_pointer pointer;
_LIBCPP_INLINE_VISIBILITY __hash_const_local_iterator() _NOEXCEPT
{
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->__insert_i(this);
#endif
}
_LIBCPP_INLINE_VISIBILITY
__hash_const_local_iterator(const __non_const_iterator& __x) _NOEXCEPT
: __node_(__x.__node_),
__bucket_(__x.__bucket_),
__bucket_count_(__x.__bucket_count_)
{
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->__iterator_copy(this, &__x);
#endif
}
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
__hash_const_local_iterator(const __hash_const_local_iterator& __i)
: __node_(__i.__node_),
__bucket_(__i.__bucket_),
__bucket_count_(__i.__bucket_count_)
{
__get_db()->__iterator_copy(this, &__i);
}
_LIBCPP_INLINE_VISIBILITY
~__hash_const_local_iterator()
{
__get_db()->__erase_i(this);
}
_LIBCPP_INLINE_VISIBILITY
__hash_const_local_iterator& operator=(const __hash_const_local_iterator& __i)
{
if (this != &__i)
{
__get_db()->__iterator_copy(this, &__i);
__node_ = __i.__node_;
__bucket_ = __i.__bucket_;
__bucket_count_ = __i.__bucket_count_;
}
return *this;
}
#endif // _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
reference operator*() const
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to dereference a non-dereferenceable unordered container const_local_iterator");
#endif
return __node_->__value_;
}
_LIBCPP_INLINE_VISIBILITY
pointer operator->() const
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to dereference a non-dereferenceable unordered container const_local_iterator");
#endif
return pointer_traits<pointer>::pointer_to(__node_->__value_);
}
_LIBCPP_INLINE_VISIBILITY
__hash_const_local_iterator& operator++()
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
"Attempted to increment non-incrementable unordered container const_local_iterator");
#endif
__node_ = __node_->__next_;
if (__node_ != nullptr && __constrain_hash(__node_->__hash_, __bucket_count_) != __bucket_)
__node_ = nullptr;
return *this;
}
_LIBCPP_INLINE_VISIBILITY
__hash_const_local_iterator operator++(int)
{
__hash_const_local_iterator __t(*this);
++(*this);
return __t;
}
friend _LIBCPP_INLINE_VISIBILITY
bool operator==(const __hash_const_local_iterator& __x, const __hash_const_local_iterator& __y)
{
return __x.__node_ == __y.__node_;
}
friend _LIBCPP_INLINE_VISIBILITY
bool operator!=(const __hash_const_local_iterator& __x, const __hash_const_local_iterator& __y)
{return !(__x == __y);}
private:
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_INLINE_VISIBILITY
__hash_const_local_iterator(__node_pointer __node, size_t __bucket,
size_t __bucket_count, const void* __c) _NOEXCEPT
: __node_(__node),
__bucket_(__bucket),
__bucket_count_(__bucket_count)
{
__get_db()->__insert_ic(this, __c);
if (__node_ != nullptr)
__node_ = __node_->__next_;
}
#else
_LIBCPP_INLINE_VISIBILITY
__hash_const_local_iterator(__node_pointer __node, size_t __bucket,
size_t __bucket_count) _NOEXCEPT
: __node_(__node),
__bucket_(__bucket),
__bucket_count_(__bucket_count)
{
if (__node_ != nullptr)
__node_ = __node_->__next_;
}
#endif
template <class, class, class, class> friend class __hash_table;
template <class> friend class _LIBCPP_TYPE_VIS_ONLY __hash_map_const_iterator;
};
template <class _Alloc>
class __bucket_list_deallocator
{
typedef _Alloc allocator_type;
typedef allocator_traits<allocator_type> __alloc_traits;
typedef typename __alloc_traits::size_type size_type;
__compressed_pair<size_type, allocator_type> __data_;
public:
typedef typename __alloc_traits::pointer pointer;
_LIBCPP_INLINE_VISIBILITY
__bucket_list_deallocator()
_NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value)
: __data_(0) {}
_LIBCPP_INLINE_VISIBILITY
__bucket_list_deallocator(const allocator_type& __a, size_type __size)
_NOEXCEPT_(is_nothrow_copy_constructible<allocator_type>::value)
: __data_(__size, __a) {}
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
_LIBCPP_INLINE_VISIBILITY
__bucket_list_deallocator(__bucket_list_deallocator&& __x)
_NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value)
: __data_(_VSTD::move(__x.__data_))
{
__x.size() = 0;
}
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
_LIBCPP_INLINE_VISIBILITY
size_type& size() _NOEXCEPT {return __data_.first();}
_LIBCPP_INLINE_VISIBILITY
size_type size() const _NOEXCEPT {return __data_.first();}
_LIBCPP_INLINE_VISIBILITY
allocator_type& __alloc() _NOEXCEPT {return __data_.second();}
_LIBCPP_INLINE_VISIBILITY
const allocator_type& __alloc() const _NOEXCEPT {return __data_.second();}
_LIBCPP_INLINE_VISIBILITY
void operator()(pointer __p) _NOEXCEPT
{
__alloc_traits::deallocate(__alloc(), __p, size());
}
};
template <class _Alloc> class __hash_map_node_destructor;
template <class _Alloc>
class __hash_node_destructor
{
typedef _Alloc allocator_type;
typedef allocator_traits<allocator_type> __alloc_traits;
public:
typedef typename __alloc_traits::pointer pointer;
private:
typedef __hash_node_types<pointer> _NodeTypes;
allocator_type& __na_;
__hash_node_destructor& operator=(const __hash_node_destructor&);
public:
bool __value_constructed;
_LIBCPP_INLINE_VISIBILITY
explicit __hash_node_destructor(allocator_type& __na,
bool __constructed = false) _NOEXCEPT
: __na_(__na),
__value_constructed(__constructed)
{}
_LIBCPP_INLINE_VISIBILITY
void operator()(pointer __p) _NOEXCEPT
{
if (__value_constructed)
__alloc_traits::destroy(__na_, _NodeTypes::__get_ptr(__p->__value_));
if (__p)
__alloc_traits::deallocate(__na_, __p, 1);
}
template <class> friend class __hash_map_node_destructor;
};
template <class _Tp, class _Hash, class _Equal, class _Alloc>
class __hash_table
{
public:
typedef _Tp value_type;
typedef _Hash hasher;
typedef _Equal key_equal;
typedef _Alloc allocator_type;
private:
typedef allocator_traits<allocator_type> __alloc_traits;
typedef typename
__make_hash_node_types<value_type, typename __alloc_traits::void_pointer>::type
_NodeTypes;
public:
typedef typename _NodeTypes::__node_value_type __node_value_type;
typedef typename _NodeTypes::__container_value_type __container_value_type;
typedef typename _NodeTypes::key_type key_type;
typedef value_type& reference;
typedef const value_type& const_reference;
typedef typename __alloc_traits::pointer pointer;
typedef typename __alloc_traits::const_pointer const_pointer;
#ifndef _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE
typedef typename __alloc_traits::size_type size_type;
#else
typedef typename _NodeTypes::size_type size_type;
#endif
typedef typename _NodeTypes::difference_type difference_type;
public:
// Create __node
typedef typename _NodeTypes::__node_type __node;
typedef typename __rebind_alloc_helper<__alloc_traits, __node>::type __node_allocator;
typedef allocator_traits<__node_allocator> __node_traits;
typedef typename _NodeTypes::__void_pointer __void_pointer;
typedef typename _NodeTypes::__node_pointer __node_pointer;
typedef typename _NodeTypes::__node_pointer __node_const_pointer;
typedef typename _NodeTypes::__node_base_type __first_node;
typedef typename _NodeTypes::__node_base_pointer __node_base_pointer;
private:
// check for sane allocator pointer rebinding semantics. Rebinding the
// allocator for a new pointer type should be exactly the same as rebinding
// the pointer using 'pointer_traits'.
static_assert((is_same<__node_pointer, typename __node_traits::pointer>::value),
"Allocator does not rebind pointers in a sane manner.");
typedef typename __rebind_alloc_helper<__node_traits, __first_node>::type
__node_base_allocator;
typedef allocator_traits<__node_base_allocator> __node_base_traits;
static_assert((is_same<__node_base_pointer, typename __node_base_traits::pointer>::value),
"Allocator does not rebind pointers in a sane manner.");
private:
typedef typename __rebind_alloc_helper<__node_traits, __node_pointer>::type __pointer_allocator;
typedef __bucket_list_deallocator<__pointer_allocator> __bucket_list_deleter;
typedef unique_ptr<__node_pointer[], __bucket_list_deleter> __bucket_list;
typedef allocator_traits<__pointer_allocator> __pointer_alloc_traits;
typedef typename __bucket_list_deleter::pointer __node_pointer_pointer;
// --- Member data begin ---
__bucket_list __bucket_list_;
__compressed_pair<__first_node, __node_allocator> __p1_;
__compressed_pair<size_type, hasher> __p2_;
__compressed_pair<float, key_equal> __p3_;
// --- Member data end ---
_LIBCPP_INLINE_VISIBILITY
size_type& size() _NOEXCEPT {return __p2_.first();}
public:
_LIBCPP_INLINE_VISIBILITY
size_type size() const _NOEXCEPT {return __p2_.first();}
_LIBCPP_INLINE_VISIBILITY
hasher& hash_function() _NOEXCEPT {return __p2_.second();}
_LIBCPP_INLINE_VISIBILITY
const hasher& hash_function() const _NOEXCEPT {return __p2_.second();}
_LIBCPP_INLINE_VISIBILITY
float& max_load_factor() _NOEXCEPT {return __p3_.first();}
_LIBCPP_INLINE_VISIBILITY
float max_load_factor() const _NOEXCEPT {return __p3_.first();}
_LIBCPP_INLINE_VISIBILITY
key_equal& key_eq() _NOEXCEPT {return __p3_.second();}
_LIBCPP_INLINE_VISIBILITY
const key_equal& key_eq() const _NOEXCEPT {return __p3_.second();}
_LIBCPP_INLINE_VISIBILITY
__node_allocator& __node_alloc() _NOEXCEPT {return __p1_.second();}
_LIBCPP_INLINE_VISIBILITY
const __node_allocator& __node_alloc() const _NOEXCEPT
{return __p1_.second();}
public:
typedef __hash_iterator<__node_pointer> iterator;
typedef __hash_const_iterator<__node_pointer> const_iterator;
typedef __hash_local_iterator<__node_pointer> local_iterator;
typedef __hash_const_local_iterator<__node_pointer> const_local_iterator;
_LIBCPP_INLINE_VISIBILITY
__hash_table()
_NOEXCEPT_(
is_nothrow_default_constructible<__bucket_list>::value &&
is_nothrow_default_constructible<__first_node>::value &&
is_nothrow_default_constructible<__node_allocator>::value &&
is_nothrow_default_constructible<hasher>::value &&
is_nothrow_default_constructible<key_equal>::value);
_LIBCPP_INLINE_VISIBILITY
__hash_table(const hasher& __hf, const key_equal& __eql);
__hash_table(const hasher& __hf, const key_equal& __eql,
const allocator_type& __a);
explicit __hash_table(const allocator_type& __a);
__hash_table(const __hash_table& __u);
__hash_table(const __hash_table& __u, const allocator_type& __a);
#ifndef _LIBCPP_CXX03_LANG
__hash_table(__hash_table&& __u)
_NOEXCEPT_(
is_nothrow_move_constructible<__bucket_list>::value &&
is_nothrow_move_constructible<__first_node>::value &&
is_nothrow_move_constructible<__node_allocator>::value &&
is_nothrow_move_constructible<hasher>::value &&
is_nothrow_move_constructible<key_equal>::value);
__hash_table(__hash_table&& __u, const allocator_type& __a);
#endif // _LIBCPP_CXX03_LANG
~__hash_table();
__hash_table& operator=(const __hash_table& __u);
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_INLINE_VISIBILITY
__hash_table& operator=(__hash_table&& __u)
_NOEXCEPT_(
__node_traits::propagate_on_container_move_assignment::value &&
is_nothrow_move_assignable<__node_allocator>::value &&
is_nothrow_move_assignable<hasher>::value &&
is_nothrow_move_assignable<key_equal>::value);
#endif
template <class _InputIterator>
void __assign_unique(_InputIterator __first, _InputIterator __last);
template <class _InputIterator>
void __assign_multi(_InputIterator __first, _InputIterator __last);
_LIBCPP_INLINE_VISIBILITY
size_type max_size() const _NOEXCEPT
{
return allocator_traits<__pointer_allocator>::max_size(
__bucket_list_.get_deleter().__alloc());
}
pair<iterator, bool> __node_insert_unique(__node_pointer __nd);
iterator __node_insert_multi(__node_pointer __nd);
iterator __node_insert_multi(const_iterator __p,
__node_pointer __nd);
#ifndef _LIBCPP_CXX03_LANG
template <class _Key, class ..._Args>
_LIBCPP_INLINE_VISIBILITY
pair<iterator, bool> __emplace_unique_key_args(_Key const& __k, _Args&&... __args);
template <class... _Args>
_LIBCPP_INLINE_VISIBILITY
pair<iterator, bool> __emplace_unique_impl(_Args&&... __args);
template <class _Pp>
_LIBCPP_INLINE_VISIBILITY
pair<iterator, bool> __emplace_unique(_Pp&& __x) {
return __emplace_unique_extract_key(_VSTD::forward<_Pp>(__x),
__can_extract_key<_Pp, key_type>());
}
template <class... _Args>
_LIBCPP_INLINE_VISIBILITY
pair<iterator, bool> __emplace_unique(_Args&&... __args) {
return __emplace_unique_impl(_VSTD::forward<_Args>(__args)...);
}
template <class _Pp>
_LIBCPP_INLINE_VISIBILITY
pair<iterator, bool>
__emplace_unique_extract_key(_Pp&& __x, __extract_key_fail_tag) {
return __emplace_unique_impl(_VSTD::forward<_Pp>(__x));
}
template <class _Pp>
_LIBCPP_INLINE_VISIBILITY
pair<iterator, bool>
__emplace_unique_extract_key(_Pp&& __x, __extract_key_self_tag) {
return __emplace_unique_key_args(__x, _VSTD::forward<_Pp>(__x));
}
template <class _Pp>
_LIBCPP_INLINE_VISIBILITY
pair<iterator, bool>
__emplace_unique_extract_key(_Pp&& __x, __extract_key_first_tag) {
return __emplace_unique_key_args(__x.first, _VSTD::forward<_Pp>(__x));
}
template <class... _Args>
_LIBCPP_INLINE_VISIBILITY
iterator __emplace_multi(_Args&&... __args);
template <class... _Args>
_LIBCPP_INLINE_VISIBILITY
iterator __emplace_hint_multi(const_iterator __p, _Args&&... __args);
_LIBCPP_INLINE_VISIBILITY
pair<iterator, bool>
__insert_unique(__container_value_type&& __x) {
return __emplace_unique_key_args(_NodeTypes::__get_key(__x), _VSTD::move(__x));
}
template <class _Pp, class = typename enable_if<
!__is_same_uncvref<_Pp, __container_value_type>::value
>::type>
_LIBCPP_INLINE_VISIBILITY
pair<iterator, bool> __insert_unique(_Pp&& __x) {
return __emplace_unique(_VSTD::forward<_Pp>(__x));
}
template <class _Pp>
_LIBCPP_INLINE_VISIBILITY
iterator __insert_multi(_Pp&& __x) {
return __emplace_multi(_VSTD::forward<_Pp>(__x));
}
template <class _Pp>
_LIBCPP_INLINE_VISIBILITY
iterator __insert_multi(const_iterator __p, _Pp&& __x) {
return __emplace_hint_multi(__p, _VSTD::forward<_Pp>(__x));
}
#else // !defined(_LIBCPP_CXX03_LANG)
template <class _Key, class _Args>
pair<iterator, bool> __emplace_unique_key_args(_Key const&, _Args& __args);
iterator __insert_multi(const __container_value_type& __x);
iterator __insert_multi(const_iterator __p, const __container_value_type& __x);
#endif
_LIBCPP_INLINE_VISIBILITY
pair<iterator, bool> __insert_unique(const __container_value_type& __x) {
return __emplace_unique_key_args(_NodeTypes::__get_key(__x), __x);
}
void clear() _NOEXCEPT;
void rehash(size_type __n);
_LIBCPP_INLINE_VISIBILITY void reserve(size_type __n)
{rehash(static_cast<size_type>(ceil(__n / max_load_factor())));}
_LIBCPP_INLINE_VISIBILITY
size_type bucket_count() const _NOEXCEPT
{
return __bucket_list_.get_deleter().size();
}
_LIBCPP_INLINE_VISIBILITY
iterator begin() _NOEXCEPT;
_LIBCPP_INLINE_VISIBILITY
iterator end() _NOEXCEPT;
_LIBCPP_INLINE_VISIBILITY
const_iterator begin() const _NOEXCEPT;
_LIBCPP_INLINE_VISIBILITY
const_iterator end() const _NOEXCEPT;
template <class _Key>
_LIBCPP_INLINE_VISIBILITY
size_type bucket(const _Key& __k) const
{
_LIBCPP_ASSERT(bucket_count() > 0,
"unordered container::bucket(key) called when bucket_count() == 0");
return __constrain_hash(hash_function()(__k), bucket_count());
}
template <class _Key>
iterator find(const _Key& __x);
template <class _Key>
const_iterator find(const _Key& __x) const;
typedef __hash_node_destructor<__node_allocator> _Dp;
typedef unique_ptr<__node, _Dp> __node_holder;
iterator erase(const_iterator __p);
iterator erase(const_iterator __first, const_iterator __last);
template <class _Key>
size_type __erase_unique(const _Key& __k);
template <class _Key>
size_type __erase_multi(const _Key& __k);
__node_holder remove(const_iterator __p) _NOEXCEPT;
template <class _Key>
_LIBCPP_INLINE_VISIBILITY
size_type __count_unique(const _Key& __k) const;
template <class _Key>
size_type __count_multi(const _Key& __k) const;
template <class _Key>
pair<iterator, iterator>
__equal_range_unique(const _Key& __k);
template <class _Key>
pair<const_iterator, const_iterator>
__equal_range_unique(const _Key& __k) const;
template <class _Key>
pair<iterator, iterator>
__equal_range_multi(const _Key& __k);
template <class _Key>
pair<const_iterator, const_iterator>
__equal_range_multi(const _Key& __k) const;
void swap(__hash_table& __u)
#if _LIBCPP_STD_VER <= 11
_NOEXCEPT_(
__is_nothrow_swappable<hasher>::value && __is_nothrow_swappable<key_equal>::value
&& (!allocator_traits<__pointer_allocator>::propagate_on_container_swap::value
|| __is_nothrow_swappable<__pointer_allocator>::value)
&& (!__node_traits::propagate_on_container_swap::value
|| __is_nothrow_swappable<__node_allocator>::value)
);
#else
_NOEXCEPT_(__is_nothrow_swappable<hasher>::value && __is_nothrow_swappable<key_equal>::value);
#endif
_LIBCPP_INLINE_VISIBILITY
size_type max_bucket_count() const _NOEXCEPT
{return __pointer_alloc_traits::max_size(__bucket_list_.get_deleter().__alloc());}
size_type bucket_size(size_type __n) const;
_LIBCPP_INLINE_VISIBILITY float load_factor() const _NOEXCEPT
{
size_type __bc = bucket_count();
return __bc != 0 ? (float)size() / __bc : 0.f;
}
_LIBCPP_INLINE_VISIBILITY void max_load_factor(float __mlf) _NOEXCEPT
{
_LIBCPP_ASSERT(__mlf > 0,
"unordered container::max_load_factor(lf) called with lf <= 0");
max_load_factor() = _VSTD::max(__mlf, load_factor());
}
_LIBCPP_INLINE_VISIBILITY
local_iterator
begin(size_type __n)
{
_LIBCPP_ASSERT(__n < bucket_count(),
"unordered container::begin(n) called with n >= bucket_count()");
#if _LIBCPP_DEBUG_LEVEL >= 2
return local_iterator(__bucket_list_[__n], __n, bucket_count(), this);
#else
return local_iterator(__bucket_list_[__n], __n, bucket_count());
#endif
}
_LIBCPP_INLINE_VISIBILITY
local_iterator
end(size_type __n)
{
_LIBCPP_ASSERT(__n < bucket_count(),
"unordered container::end(n) called with n >= bucket_count()");
#if _LIBCPP_DEBUG_LEVEL >= 2
return local_iterator(nullptr, __n, bucket_count(), this);
#else
return local_iterator(nullptr, __n, bucket_count());
#endif
}
_LIBCPP_INLINE_VISIBILITY
const_local_iterator
cbegin(size_type __n) const
{
_LIBCPP_ASSERT(__n < bucket_count(),
"unordered container::cbegin(n) called with n >= bucket_count()");
#if _LIBCPP_DEBUG_LEVEL >= 2
return const_local_iterator(__bucket_list_[__n], __n, bucket_count(), this);
#else
return const_local_iterator(__bucket_list_[__n], __n, bucket_count());
#endif
}
_LIBCPP_INLINE_VISIBILITY
const_local_iterator
cend(size_type __n) const
{
_LIBCPP_ASSERT(__n < bucket_count(),
"unordered container::cend(n) called with n >= bucket_count()");
#if _LIBCPP_DEBUG_LEVEL >= 2
return const_local_iterator(nullptr, __n, bucket_count(), this);
#else
return const_local_iterator(nullptr, __n, bucket_count());
#endif
}
#if _LIBCPP_DEBUG_LEVEL >= 2
bool __dereferenceable(const const_iterator* __i) const;
bool __decrementable(const const_iterator* __i) const;
bool __addable(const const_iterator* __i, ptrdiff_t __n) const;
bool __subscriptable(const const_iterator* __i, ptrdiff_t __n) const;
#endif // _LIBCPP_DEBUG_LEVEL >= 2
private:
void __rehash(size_type __n);
#ifndef _LIBCPP_CXX03_LANG
template <class ..._Args>
__node_holder __construct_node(_Args&& ...__args);
template <class _First, class ..._Rest>
__node_holder __construct_node_hash(size_t __hash, _First&& __f, _Rest&&... __rest);
#else // _LIBCPP_CXX03_LANG
__node_holder __construct_node(const __container_value_type& __v);
__node_holder __construct_node_hash(size_t __hash, const __container_value_type& __v);
#endif
_LIBCPP_INLINE_VISIBILITY
void __copy_assign_alloc(const __hash_table& __u)
{__copy_assign_alloc(__u, integral_constant<bool,
__node_traits::propagate_on_container_copy_assignment::value>());}
void __copy_assign_alloc(const __hash_table& __u, true_type);
_LIBCPP_INLINE_VISIBILITY
void __copy_assign_alloc(const __hash_table&, false_type) {}
#ifndef _LIBCPP_CXX03_LANG
void __move_assign(__hash_table& __u, false_type);
void __move_assign(__hash_table& __u, true_type)
_NOEXCEPT_(
is_nothrow_move_assignable<__node_allocator>::value &&
is_nothrow_move_assignable<hasher>::value &&
is_nothrow_move_assignable<key_equal>::value);
_LIBCPP_INLINE_VISIBILITY
void __move_assign_alloc(__hash_table& __u)
_NOEXCEPT_(
!__node_traits::propagate_on_container_move_assignment::value ||
(is_nothrow_move_assignable<__pointer_allocator>::value &&
is_nothrow_move_assignable<__node_allocator>::value))
{__move_assign_alloc(__u, integral_constant<bool,
__node_traits::propagate_on_container_move_assignment::value>());}
_LIBCPP_INLINE_VISIBILITY
void __move_assign_alloc(__hash_table& __u, true_type)
_NOEXCEPT_(
is_nothrow_move_assignable<__pointer_allocator>::value &&
is_nothrow_move_assignable<__node_allocator>::value)
{
__bucket_list_.get_deleter().__alloc() =
_VSTD::move(__u.__bucket_list_.get_deleter().__alloc());
__node_alloc() = _VSTD::move(__u.__node_alloc());
}
_LIBCPP_INLINE_VISIBILITY
void __move_assign_alloc(__hash_table&, false_type) _NOEXCEPT {}
#endif // _LIBCPP_CXX03_LANG
void __deallocate(__node_pointer __np) _NOEXCEPT;
__node_pointer __detach() _NOEXCEPT;
template <class, class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY unordered_map;
template <class, class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY unordered_multimap;
};
template <class _Tp, class _Hash, class _Equal, class _Alloc>
inline
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__hash_table()
_NOEXCEPT_(
is_nothrow_default_constructible<__bucket_list>::value &&
is_nothrow_default_constructible<__first_node>::value &&
is_nothrow_default_constructible<__node_allocator>::value &&
is_nothrow_default_constructible<hasher>::value &&
is_nothrow_default_constructible<key_equal>::value)
: __p2_(0),
__p3_(1.0f)
{
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
inline
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__hash_table(const hasher& __hf,
const key_equal& __eql)
: __bucket_list_(nullptr, __bucket_list_deleter()),
__p1_(),
__p2_(0, __hf),
__p3_(1.0f, __eql)
{
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__hash_table(const hasher& __hf,
const key_equal& __eql,
const allocator_type& __a)
: __bucket_list_(nullptr, __bucket_list_deleter(__pointer_allocator(__a), 0)),
__p1_(__node_allocator(__a)),
__p2_(0, __hf),
__p3_(1.0f, __eql)
{
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__hash_table(const allocator_type& __a)
: __bucket_list_(nullptr, __bucket_list_deleter(__pointer_allocator(__a), 0)),
__p1_(__node_allocator(__a)),
__p2_(0),
__p3_(1.0f)
{
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__hash_table(const __hash_table& __u)
: __bucket_list_(nullptr,
__bucket_list_deleter(allocator_traits<__pointer_allocator>::
select_on_container_copy_construction(
__u.__bucket_list_.get_deleter().__alloc()), 0)),
__p1_(allocator_traits<__node_allocator>::
select_on_container_copy_construction(__u.__node_alloc())),
__p2_(0, __u.hash_function()),
__p3_(__u.__p3_)
{
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__hash_table(const __hash_table& __u,
const allocator_type& __a)
: __bucket_list_(nullptr, __bucket_list_deleter(__pointer_allocator(__a), 0)),
__p1_(__node_allocator(__a)),
__p2_(0, __u.hash_function()),
__p3_(__u.__p3_)
{
}
#ifndef _LIBCPP_CXX03_LANG
template <class _Tp, class _Hash, class _Equal, class _Alloc>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__hash_table(__hash_table&& __u)
_NOEXCEPT_(
is_nothrow_move_constructible<__bucket_list>::value &&
is_nothrow_move_constructible<__first_node>::value &&
is_nothrow_move_constructible<__node_allocator>::value &&
is_nothrow_move_constructible<hasher>::value &&
is_nothrow_move_constructible<key_equal>::value)
: __bucket_list_(_VSTD::move(__u.__bucket_list_)),
__p1_(_VSTD::move(__u.__p1_)),
__p2_(_VSTD::move(__u.__p2_)),
__p3_(_VSTD::move(__u.__p3_))
{
if (size() > 0)
{
__bucket_list_[__constrain_hash(__p1_.first().__next_->__hash_, bucket_count())] =
static_cast<__node_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__p1_.first()));
__u.__p1_.first().__next_ = nullptr;
__u.size() = 0;
}
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__hash_table(__hash_table&& __u,
const allocator_type& __a)
: __bucket_list_(nullptr, __bucket_list_deleter(__pointer_allocator(__a), 0)),
__p1_(__node_allocator(__a)),
__p2_(0, _VSTD::move(__u.hash_function())),
__p3_(_VSTD::move(__u.__p3_))
{
if (__a == allocator_type(__u.__node_alloc()))
{
__bucket_list_.reset(__u.__bucket_list_.release());
__bucket_list_.get_deleter().size() = __u.__bucket_list_.get_deleter().size();
__u.__bucket_list_.get_deleter().size() = 0;
if (__u.size() > 0)
{
__p1_.first().__next_ = __u.__p1_.first().__next_;
__u.__p1_.first().__next_ = nullptr;
__bucket_list_[__constrain_hash(__p1_.first().__next_->__hash_, bucket_count())] =
static_cast<__node_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__p1_.first()));
size() = __u.size();
__u.size() = 0;
}
}
}
#endif // _LIBCPP_CXX03_LANG
template <class _Tp, class _Hash, class _Equal, class _Alloc>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::~__hash_table()
{
__deallocate(__p1_.first().__next_);
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->__erase_c(this);
#endif
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
void
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__copy_assign_alloc(
const __hash_table& __u, true_type)
{
if (__node_alloc() != __u.__node_alloc())
{
clear();
__bucket_list_.reset();
__bucket_list_.get_deleter().size() = 0;
}
__bucket_list_.get_deleter().__alloc() = __u.__bucket_list_.get_deleter().__alloc();
__node_alloc() = __u.__node_alloc();
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
__hash_table<_Tp, _Hash, _Equal, _Alloc>&
__hash_table<_Tp, _Hash, _Equal, _Alloc>::operator=(const __hash_table& __u)
{
if (this != &__u)
{
__copy_assign_alloc(__u);
hash_function() = __u.hash_function();
key_eq() = __u.key_eq();
max_load_factor() = __u.max_load_factor();
__assign_multi(__u.begin(), __u.end());
}
return *this;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
void
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__deallocate(__node_pointer __np)
_NOEXCEPT
{
__node_allocator& __na = __node_alloc();
while (__np != nullptr)
{
__node_pointer __next = __np->__next_;
#if _LIBCPP_DEBUG_LEVEL >= 2
__c_node* __c = __get_db()->__find_c_and_lock(this);
for (__i_node** __p = __c->end_; __p != __c->beg_; )
{
--__p;
iterator* __i = static_cast<iterator*>((*__p)->__i_);
if (__i->__node_ == __np)
{
(*__p)->__c_ = nullptr;
if (--__c->end_ != __p)
memmove(__p, __p+1, (__c->end_ - __p)*sizeof(__i_node*));
}
}
__get_db()->unlock();
#endif
__node_traits::destroy(__na, _NodeTypes::__get_ptr(__np->__value_));
__node_traits::deallocate(__na, __np, 1);
__np = __next;
}
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::__node_pointer
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__detach() _NOEXCEPT
{
size_type __bc = bucket_count();
for (size_type __i = 0; __i < __bc; ++__i)
__bucket_list_[__i] = nullptr;
size() = 0;
__node_pointer __cache = __p1_.first().__next_;
__p1_.first().__next_ = nullptr;
return __cache;
}
#ifndef _LIBCPP_CXX03_LANG
template <class _Tp, class _Hash, class _Equal, class _Alloc>
void
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__move_assign(
__hash_table& __u, true_type)
_NOEXCEPT_(
is_nothrow_move_assignable<__node_allocator>::value &&
is_nothrow_move_assignable<hasher>::value &&
is_nothrow_move_assignable<key_equal>::value)
{
clear();
__bucket_list_.reset(__u.__bucket_list_.release());
__bucket_list_.get_deleter().size() = __u.__bucket_list_.get_deleter().size();
__u.__bucket_list_.get_deleter().size() = 0;
__move_assign_alloc(__u);
size() = __u.size();
hash_function() = _VSTD::move(__u.hash_function());
max_load_factor() = __u.max_load_factor();
key_eq() = _VSTD::move(__u.key_eq());
__p1_.first().__next_ = __u.__p1_.first().__next_;
if (size() > 0)
{
__bucket_list_[__constrain_hash(__p1_.first().__next_->__hash_, bucket_count())] =
static_cast<__node_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__p1_.first()));
__u.__p1_.first().__next_ = nullptr;
__u.size() = 0;
}
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->swap(this, &__u);
#endif
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
void
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__move_assign(
__hash_table& __u, false_type)
{
if (__node_alloc() == __u.__node_alloc())
__move_assign(__u, true_type());
else
{
hash_function() = _VSTD::move(__u.hash_function());
key_eq() = _VSTD::move(__u.key_eq());
max_load_factor() = __u.max_load_factor();
if (bucket_count() != 0)
{
__node_pointer __cache = __detach();
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
const_iterator __i = __u.begin();
while (__cache != nullptr && __u.size() != 0)
{
__cache->__value_ = _VSTD::move(__u.remove(__i++)->__value_);
__node_pointer __next = __cache->__next_;
__node_insert_multi(__cache);
__cache = __next;
}
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__deallocate(__cache);
throw;
}
#endif // _LIBCPP_NO_EXCEPTIONS
__deallocate(__cache);
}
const_iterator __i = __u.begin();
while (__u.size() != 0)
{
__node_holder __h = __construct_node(_NodeTypes::__move(__u.remove(__i++)->__value_));
__node_insert_multi(__h.get());
__h.release();
}
}
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
inline
__hash_table<_Tp, _Hash, _Equal, _Alloc>&
__hash_table<_Tp, _Hash, _Equal, _Alloc>::operator=(__hash_table&& __u)
_NOEXCEPT_(
__node_traits::propagate_on_container_move_assignment::value &&
is_nothrow_move_assignable<__node_allocator>::value &&
is_nothrow_move_assignable<hasher>::value &&
is_nothrow_move_assignable<key_equal>::value)
{
__move_assign(__u, integral_constant<bool,
__node_traits::propagate_on_container_move_assignment::value>());
return *this;
}
#endif // _LIBCPP_CXX03_LANG
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _InputIterator>
void
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__assign_unique(_InputIterator __first,
_InputIterator __last)
{
typedef iterator_traits<_InputIterator> _ITraits;
typedef typename _ITraits::value_type _ItValueType;
static_assert((is_same<_ItValueType, __container_value_type>::value),
"__assign_unique may only be called with the containers value type");
if (bucket_count() != 0)
{
__node_pointer __cache = __detach();
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
for (; __cache != nullptr && __first != __last; ++__first)
{
__cache->__value_ = *__first;
__node_pointer __next = __cache->__next_;
__node_insert_unique(__cache);
__cache = __next;
}
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__deallocate(__cache);
throw;
}
#endif // _LIBCPP_NO_EXCEPTIONS
__deallocate(__cache);
}
for (; __first != __last; ++__first)
__insert_unique(*__first);
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _InputIterator>
void
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__assign_multi(_InputIterator __first,
_InputIterator __last)
{
typedef iterator_traits<_InputIterator> _ITraits;
typedef typename _ITraits::value_type _ItValueType;
static_assert((is_same<_ItValueType, __container_value_type>::value ||
is_same<_ItValueType, __node_value_type>::value),
"__assign_multi may only be called with the containers value type"
" or the nodes value type");
if (bucket_count() != 0)
{
__node_pointer __cache = __detach();
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
for (; __cache != nullptr && __first != __last; ++__first)
{
__cache->__value_ = *__first;
__node_pointer __next = __cache->__next_;
__node_insert_multi(__cache);
__cache = __next;
}
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
__deallocate(__cache);
throw;
}
#endif // _LIBCPP_NO_EXCEPTIONS
__deallocate(__cache);
}
for (; __first != __last; ++__first)
__insert_multi(_NodeTypes::__get_value(*__first));
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
inline
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::begin() _NOEXCEPT
{
#if _LIBCPP_DEBUG_LEVEL >= 2
return iterator(__p1_.first().__next_, this);
#else
return iterator(__p1_.first().__next_);
#endif
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
inline
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::end() _NOEXCEPT
{
#if _LIBCPP_DEBUG_LEVEL >= 2
return iterator(nullptr, this);
#else
return iterator(nullptr);
#endif
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
inline
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::const_iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::begin() const _NOEXCEPT
{
#if _LIBCPP_DEBUG_LEVEL >= 2
return const_iterator(__p1_.first().__next_, this);
#else
return const_iterator(__p1_.first().__next_);
#endif
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
inline
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::const_iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::end() const _NOEXCEPT
{
#if _LIBCPP_DEBUG_LEVEL >= 2
return const_iterator(nullptr, this);
#else
return const_iterator(nullptr);
#endif
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
void
__hash_table<_Tp, _Hash, _Equal, _Alloc>::clear() _NOEXCEPT
{
if (size() > 0)
{
__deallocate(__p1_.first().__next_);
__p1_.first().__next_ = nullptr;
size_type __bc = bucket_count();
for (size_type __i = 0; __i < __bc; ++__i)
__bucket_list_[__i] = nullptr;
size() = 0;
}
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
pair<typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator, bool>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__node_insert_unique(__node_pointer __nd)
{
__nd->__hash_ = hash_function()(__nd->__value_);
size_type __bc = bucket_count();
bool __inserted = false;
__node_pointer __ndptr;
size_t __chash;
if (__bc != 0)
{
__chash = __constrain_hash(__nd->__hash_, __bc);
__ndptr = __bucket_list_[__chash];
if (__ndptr != nullptr)
{
for (__ndptr = __ndptr->__next_; __ndptr != nullptr &&
__constrain_hash(__ndptr->__hash_, __bc) == __chash;
__ndptr = __ndptr->__next_)
{
if (key_eq()(__ndptr->__value_, __nd->__value_))
goto __done;
}
}
}
{
if (size()+1 > __bc * max_load_factor() || __bc == 0)
{
rehash(_VSTD::max<size_type>(2 * __bc + !__is_hash_power2(__bc),
size_type(ceil(float(size() + 1) / max_load_factor()))));
__bc = bucket_count();
__chash = __constrain_hash(__nd->__hash_, __bc);
}
// insert_after __bucket_list_[__chash], or __first_node if bucket is null
__node_pointer __pn = __bucket_list_[__chash];
if (__pn == nullptr)
{
__pn = static_cast<__node_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__p1_.first()));
__nd->__next_ = __pn->__next_;
__pn->__next_ = __nd;
// fix up __bucket_list_
__bucket_list_[__chash] = __pn;
if (__nd->__next_ != nullptr)
__bucket_list_[__constrain_hash(__nd->__next_->__hash_, __bc)] = __nd;
}
else
{
__nd->__next_ = __pn->__next_;
__pn->__next_ = __nd;
}
__ndptr = __nd;
// increment size
++size();
__inserted = true;
}
__done:
#if _LIBCPP_DEBUG_LEVEL >= 2
return pair<iterator, bool>(iterator(__ndptr, this), __inserted);
#else
return pair<iterator, bool>(iterator(__ndptr), __inserted);
#endif
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__node_insert_multi(__node_pointer __cp)
{
__cp->__hash_ = hash_function()(__cp->__value_);
size_type __bc = bucket_count();
if (size()+1 > __bc * max_load_factor() || __bc == 0)
{
rehash(_VSTD::max<size_type>(2 * __bc + !__is_hash_power2(__bc),
size_type(ceil(float(size() + 1) / max_load_factor()))));
__bc = bucket_count();
}
size_t __chash = __constrain_hash(__cp->__hash_, __bc);
__node_pointer __pn = __bucket_list_[__chash];
if (__pn == nullptr)
{
__pn = static_cast<__node_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__p1_.first()));
__cp->__next_ = __pn->__next_;
__pn->__next_ = __cp;
// fix up __bucket_list_
__bucket_list_[__chash] = __pn;
if (__cp->__next_ != nullptr)
__bucket_list_[__constrain_hash(__cp->__next_->__hash_, __bc)] = __cp;
}
else
{
for (bool __found = false; __pn->__next_ != nullptr &&
__constrain_hash(__pn->__next_->__hash_, __bc) == __chash;
__pn = __pn->__next_)
{
// __found key_eq() action
// false false loop
// true true loop
// false true set __found to true
// true false break
if (__found != (__pn->__next_->__hash_ == __cp->__hash_ &&
key_eq()(__pn->__next_->__value_, __cp->__value_)))
{
if (!__found)
__found = true;
else
break;
}
}
__cp->__next_ = __pn->__next_;
__pn->__next_ = __cp;
if (__cp->__next_ != nullptr)
{
size_t __nhash = __constrain_hash(__cp->__next_->__hash_, __bc);
if (__nhash != __chash)
__bucket_list_[__nhash] = __cp;
}
}
++size();
#if _LIBCPP_DEBUG_LEVEL >= 2
return iterator(__cp, this);
#else
return iterator(__cp);
#endif
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__node_insert_multi(
const_iterator __p, __node_pointer __cp)
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
"unordered container::emplace_hint(const_iterator, args...) called with an iterator not"
" referring to this unordered container");
#endif
if (__p != end() && key_eq()(*__p, __cp->__value_))
{
__node_pointer __np = __p.__node_;
__cp->__hash_ = __np->__hash_;
size_type __bc = bucket_count();
if (size()+1 > __bc * max_load_factor() || __bc == 0)
{
rehash(_VSTD::max<size_type>(2 * __bc + !__is_hash_power2(__bc),
size_type(ceil(float(size() + 1) / max_load_factor()))));
__bc = bucket_count();
}
size_t __chash = __constrain_hash(__cp->__hash_, __bc);
__node_pointer __pp = __bucket_list_[__chash];
while (__pp->__next_ != __np)
__pp = __pp->__next_;
__cp->__next_ = __np;
__pp->__next_ = __cp;
++size();
#if _LIBCPP_DEBUG_LEVEL >= 2
return iterator(__cp, this);
#else
return iterator(__cp);
#endif
}
return __node_insert_multi(__cp);
}
#ifndef _LIBCPP_CXX03_LANG
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key, class ..._Args>
_LIBCPP_INLINE_VISIBILITY
pair<typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator, bool>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__emplace_unique_key_args(_Key const& __k, _Args&&... __args)
#else
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key, class _Args>
_LIBCPP_INLINE_VISIBILITY
pair<typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator, bool>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__emplace_unique_key_args(_Key const& __k, _Args& __args)
#endif
{
size_t __hash = hash_function()(__k);
size_type __bc = bucket_count();
bool __inserted = false;
__node_pointer __nd;
size_t __chash;
if (__bc != 0)
{
__chash = __constrain_hash(__hash, __bc);
__nd = __bucket_list_[__chash];
if (__nd != nullptr)
{
for (__nd = __nd->__next_; __nd != nullptr &&
__constrain_hash(__nd->__hash_, __bc) == __chash;
__nd = __nd->__next_)
{
if (key_eq()(__nd->__value_, __k))
goto __done;
}
}
}
{
#ifndef _LIBCPP_CXX03_LANG
__node_holder __h = __construct_node_hash(__hash, _VSTD::forward<_Args>(__args)...);
#else
__node_holder __h = __construct_node_hash(__hash, __args);
#endif
if (size()+1 > __bc * max_load_factor() || __bc == 0)
{
rehash(_VSTD::max<size_type>(2 * __bc + !__is_hash_power2(__bc),
size_type(ceil(float(size() + 1) / max_load_factor()))));
__bc = bucket_count();
__chash = __constrain_hash(__hash, __bc);
}
// insert_after __bucket_list_[__chash], or __first_node if bucket is null
__node_pointer __pn = __bucket_list_[__chash];
if (__pn == nullptr)
{
__pn = static_cast<__node_pointer>(static_cast<__void_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__p1_.first())));
__h->__next_ = __pn->__next_;
__pn->__next_ = __h.get();
// fix up __bucket_list_
__bucket_list_[__chash] = __pn;
if (__h->__next_ != nullptr)
__bucket_list_[__constrain_hash(__h->__next_->__hash_, __bc)] = __h.get();
}
else
{
__h->__next_ = __pn->__next_;
__pn->__next_ = __h.get();
}
__nd = __h.release();
// increment size
++size();
__inserted = true;
}
__done:
#if _LIBCPP_DEBUG_LEVEL >= 2
return pair<iterator, bool>(iterator(__nd, this), __inserted);
#else
return pair<iterator, bool>(iterator(__nd), __inserted);
#endif
}
#ifndef _LIBCPP_CXX03_LANG
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class... _Args>
pair<typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator, bool>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__emplace_unique_impl(_Args&&... __args)
{
__node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
pair<iterator, bool> __r = __node_insert_unique(__h.get());
if (__r.second)
__h.release();
return __r;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class... _Args>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__emplace_multi(_Args&&... __args)
{
__node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
iterator __r = __node_insert_multi(__h.get());
__h.release();
return __r;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class... _Args>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__emplace_hint_multi(
const_iterator __p, _Args&&... __args)
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
"unordered container::emplace_hint(const_iterator, args...) called with an iterator not"
" referring to this unordered container");
#endif
__node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
iterator __r = __node_insert_multi(__p, __h.get());
__h.release();
return __r;
}
#else // _LIBCPP_CXX03_LANG
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__insert_multi(const __container_value_type& __x)
{
__node_holder __h = __construct_node(__x);
iterator __r = __node_insert_multi(__h.get());
__h.release();
return __r;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__insert_multi(const_iterator __p,
const __container_value_type& __x)
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
"unordered container::insert(const_iterator, lvalue) called with an iterator not"
" referring to this unordered container");
#endif
__node_holder __h = __construct_node(__x);
iterator __r = __node_insert_multi(__p, __h.get());
__h.release();
return __r;
}
#endif // _LIBCPP_CXX03_LANG
template <class _Tp, class _Hash, class _Equal, class _Alloc>
void
__hash_table<_Tp, _Hash, _Equal, _Alloc>::rehash(size_type __n)
{
if (__n == 1)
__n = 2;
else if (__n & (__n - 1))
__n = __next_prime(__n);
size_type __bc = bucket_count();
if (__n > __bc)
__rehash(__n);
else if (__n < __bc)
{
__n = _VSTD::max<size_type>
(
__n,
__is_hash_power2(__bc) ? __next_hash_pow2(size_t(ceil(float(size()) / max_load_factor()))) :
__next_prime(size_t(ceil(float(size()) / max_load_factor())))
);
if (__n < __bc)
__rehash(__n);
}
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
void
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__rehash(size_type __nbc)
{
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->__invalidate_all(this);
#endif // _LIBCPP_DEBUG_LEVEL >= 2
__pointer_allocator& __npa = __bucket_list_.get_deleter().__alloc();
__bucket_list_.reset(__nbc > 0 ?
__pointer_alloc_traits::allocate(__npa, __nbc) : nullptr);
__bucket_list_.get_deleter().size() = __nbc;
if (__nbc > 0)
{
for (size_type __i = 0; __i < __nbc; ++__i)
__bucket_list_[__i] = nullptr;
__node_pointer __pp(static_cast<__node_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__p1_.first())));
__node_pointer __cp = __pp->__next_;
if (__cp != nullptr)
{
size_type __chash = __constrain_hash(__cp->__hash_, __nbc);
__bucket_list_[__chash] = __pp;
size_type __phash = __chash;
for (__pp = __cp, __cp = __cp->__next_; __cp != nullptr;
__cp = __pp->__next_)
{
__chash = __constrain_hash(__cp->__hash_, __nbc);
if (__chash == __phash)
__pp = __cp;
else
{
if (__bucket_list_[__chash] == nullptr)
{
__bucket_list_[__chash] = __pp;
__pp = __cp;
__phash = __chash;
}
else
{
__node_pointer __np = __cp;
for (; __np->__next_ != nullptr &&
key_eq()(__cp->__value_, __np->__next_->__value_);
__np = __np->__next_)
;
__pp->__next_ = __np->__next_;
__np->__next_ = __bucket_list_[__chash]->__next_;
__bucket_list_[__chash]->__next_ = __cp;
}
}
}
}
}
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::find(const _Key& __k)
{
size_t __hash = hash_function()(__k);
size_type __bc = bucket_count();
if (__bc != 0)
{
size_t __chash = __constrain_hash(__hash, __bc);
__node_pointer __nd = __bucket_list_[__chash];
if (__nd != nullptr)
{
for (__nd = __nd->__next_; __nd != nullptr &&
__constrain_hash(__nd->__hash_, __bc) == __chash;
__nd = __nd->__next_)
{
if (key_eq()(__nd->__value_, __k))
#if _LIBCPP_DEBUG_LEVEL >= 2
return iterator(__nd, this);
#else
return iterator(__nd);
#endif
}
}
}
return end();
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::const_iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::find(const _Key& __k) const
{
size_t __hash = hash_function()(__k);
size_type __bc = bucket_count();
if (__bc != 0)
{
size_t __chash = __constrain_hash(__hash, __bc);
__node_const_pointer __nd = __bucket_list_[__chash];
if (__nd != nullptr)
{
for (__nd = __nd->__next_; __nd != nullptr &&
__constrain_hash(__nd->__hash_, __bc) == __chash;
__nd = __nd->__next_)
{
if (key_eq()(__nd->__value_, __k))
#if _LIBCPP_DEBUG_LEVEL >= 2
return const_iterator(__nd, this);
#else
return const_iterator(__nd);
#endif
}
}
}
return end();
}
#ifndef _LIBCPP_CXX03_LANG
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class ..._Args>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::__node_holder
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__construct_node(_Args&& ...__args)
{
static_assert(!__is_hash_value_type<_Args...>::value,
"Construct cannot be called with a hash value type");
__node_allocator& __na = __node_alloc();
__node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
__node_traits::construct(__na, _NodeTypes::__get_ptr(__h->__value_), _VSTD::forward<_Args>(__args)...);
__h.get_deleter().__value_constructed = true;
__h->__hash_ = hash_function()(__h->__value_);
__h->__next_ = nullptr;
return __h;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _First, class ..._Rest>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::__node_holder
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__construct_node_hash(
size_t __hash, _First&& __f, _Rest&& ...__rest)
{
static_assert(!__is_hash_value_type<_First, _Rest...>::value,
"Construct cannot be called with a hash value type");
__node_allocator& __na = __node_alloc();
__node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
__node_traits::construct(__na, _NodeTypes::__get_ptr(__h->__value_),
_VSTD::forward<_First>(__f),
_VSTD::forward<_Rest>(__rest)...);
__h.get_deleter().__value_constructed = true;
__h->__hash_ = __hash;
__h->__next_ = nullptr;
return __h;
}
#else // _LIBCPP_CXX03_LANG
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::__node_holder
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__construct_node(const __container_value_type& __v)
{
__node_allocator& __na = __node_alloc();
__node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
__node_traits::construct(__na, _NodeTypes::__get_ptr(__h->__value_), __v);
__h.get_deleter().__value_constructed = true;
__h->__hash_ = hash_function()(__h->__value_);
__h->__next_ = nullptr;
return _LIBCPP_EXPLICIT_MOVE(__h); // explicitly moved for C++03
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::__node_holder
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__construct_node_hash(size_t __hash,
const __container_value_type& __v)
{
__node_allocator& __na = __node_alloc();
__node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
__node_traits::construct(__na, _NodeTypes::__get_ptr(__h->__value_), __v);
__h.get_deleter().__value_constructed = true;
__h->__hash_ = __hash;
__h->__next_ = nullptr;
return _LIBCPP_EXPLICIT_MOVE(__h); // explicitly moved for C++03
}
#endif // _LIBCPP_CXX03_LANG
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::erase(const_iterator __p)
{
__node_pointer __np = __p.__node_;
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
"unordered container erase(iterator) called with an iterator not"
" referring to this container");
_LIBCPP_ASSERT(__p != end(),
"unordered container erase(iterator) called with a non-dereferenceable iterator");
iterator __r(__np, this);
#else
iterator __r(__np);
#endif
++__r;
remove(__p);
return __r;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::erase(const_iterator __first,
const_iterator __last)
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__first) == this,
"unodered container::erase(iterator, iterator) called with an iterator not"
" referring to this unodered container");
_LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__last) == this,
"unodered container::erase(iterator, iterator) called with an iterator not"
" referring to this unodered container");
#endif
for (const_iterator __p = __first; __first != __last; __p = __first)
{
++__first;
erase(__p);
}
__node_pointer __np = __last.__node_;
#if _LIBCPP_DEBUG_LEVEL >= 2
return iterator (__np, this);
#else
return iterator (__np);
#endif
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::size_type
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__erase_unique(const _Key& __k)
{
iterator __i = find(__k);
if (__i == end())
return 0;
erase(__i);
return 1;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::size_type
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__erase_multi(const _Key& __k)
{
size_type __r = 0;
iterator __i = find(__k);
if (__i != end())
{
iterator __e = end();
do
{
erase(__i++);
++__r;
} while (__i != __e && key_eq()(*__i, __k));
}
return __r;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::__node_holder
__hash_table<_Tp, _Hash, _Equal, _Alloc>::remove(const_iterator __p) _NOEXCEPT
{
// current node
__node_pointer __cn = __p.__node_;
size_type __bc = bucket_count();
size_t __chash = __constrain_hash(__cn->__hash_, __bc);
// find previous node
__node_pointer __pn = __bucket_list_[__chash];
for (; __pn->__next_ != __cn; __pn = __pn->__next_)
;
// Fix up __bucket_list_
// if __pn is not in same bucket (before begin is not in same bucket) &&
// if __cn->__next_ is not in same bucket (nullptr is not in same bucket)
if (__pn == static_cast<__node_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__p1_.first()))
|| __constrain_hash(__pn->__hash_, __bc) != __chash)
{
if (__cn->__next_ == nullptr || __constrain_hash(__cn->__next_->__hash_, __bc) != __chash)
__bucket_list_[__chash] = nullptr;
}
// if __cn->__next_ is not in same bucket (nullptr is in same bucket)
if (__cn->__next_ != nullptr)
{
size_t __nhash = __constrain_hash(__cn->__next_->__hash_, __bc);
if (__nhash != __chash)
__bucket_list_[__nhash] = __pn;
}
// remove __cn
__pn->__next_ = __cn->__next_;
__cn->__next_ = nullptr;
--size();
#if _LIBCPP_DEBUG_LEVEL >= 2
__c_node* __c = __get_db()->__find_c_and_lock(this);
for (__i_node** __p = __c->end_; __p != __c->beg_; )
{
--__p;
iterator* __i = static_cast<iterator*>((*__p)->__i_);
if (__i->__node_ == __cn)
{
(*__p)->__c_ = nullptr;
if (--__c->end_ != __p)
memmove(__p, __p+1, (__c->end_ - __p)*sizeof(__i_node*));
}
}
__get_db()->unlock();
#endif
return __node_holder(__cn, _Dp(__node_alloc(), true));
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
inline
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::size_type
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__count_unique(const _Key& __k) const
{
return static_cast<size_type>(find(__k) != end());
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::size_type
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__count_multi(const _Key& __k) const
{
size_type __r = 0;
const_iterator __i = find(__k);
if (__i != end())
{
const_iterator __e = end();
do
{
++__i;
++__r;
} while (__i != __e && key_eq()(*__i, __k));
}
return __r;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
pair<typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator,
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__equal_range_unique(
const _Key& __k)
{
iterator __i = find(__k);
iterator __j = __i;
if (__i != end())
++__j;
return pair<iterator, iterator>(__i, __j);
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
pair<typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::const_iterator,
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::const_iterator>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__equal_range_unique(
const _Key& __k) const
{
const_iterator __i = find(__k);
const_iterator __j = __i;
if (__i != end())
++__j;
return pair<const_iterator, const_iterator>(__i, __j);
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
pair<typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator,
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__equal_range_multi(
const _Key& __k)
{
iterator __i = find(__k);
iterator __j = __i;
if (__i != end())
{
iterator __e = end();
do
{
++__j;
} while (__j != __e && key_eq()(*__j, __k));
}
return pair<iterator, iterator>(__i, __j);
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Key>
pair<typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::const_iterator,
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::const_iterator>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__equal_range_multi(
const _Key& __k) const
{
const_iterator __i = find(__k);
const_iterator __j = __i;
if (__i != end())
{
const_iterator __e = end();
do
{
++__j;
} while (__j != __e && key_eq()(*__j, __k));
}
return pair<const_iterator, const_iterator>(__i, __j);
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
void
__hash_table<_Tp, _Hash, _Equal, _Alloc>::swap(__hash_table& __u)
#if _LIBCPP_STD_VER <= 11
_NOEXCEPT_(
__is_nothrow_swappable<hasher>::value && __is_nothrow_swappable<key_equal>::value
&& (!allocator_traits<__pointer_allocator>::propagate_on_container_swap::value
|| __is_nothrow_swappable<__pointer_allocator>::value)
&& (!__node_traits::propagate_on_container_swap::value
|| __is_nothrow_swappable<__node_allocator>::value)
)
#else
_NOEXCEPT_(__is_nothrow_swappable<hasher>::value && __is_nothrow_swappable<key_equal>::value)
#endif
{
{
__node_pointer_pointer __npp = __bucket_list_.release();
__bucket_list_.reset(__u.__bucket_list_.release());
__u.__bucket_list_.reset(__npp);
}
_VSTD::swap(__bucket_list_.get_deleter().size(), __u.__bucket_list_.get_deleter().size());
__swap_allocator(__bucket_list_.get_deleter().__alloc(),
__u.__bucket_list_.get_deleter().__alloc());
__swap_allocator(__node_alloc(), __u.__node_alloc());
_VSTD::swap(__p1_.first().__next_, __u.__p1_.first().__next_);
__p2_.swap(__u.__p2_);
__p3_.swap(__u.__p3_);
if (size() > 0)
__bucket_list_[__constrain_hash(__p1_.first().__next_->__hash_, bucket_count())] =
static_cast<__node_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__p1_.first()));
if (__u.size() > 0)
__u.__bucket_list_[__constrain_hash(__u.__p1_.first().__next_->__hash_, __u.bucket_count())] =
static_cast<__node_pointer>(pointer_traits<__node_base_pointer>::pointer_to(__u.__p1_.first()));
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->swap(this, &__u);
#endif
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::size_type
__hash_table<_Tp, _Hash, _Equal, _Alloc>::bucket_size(size_type __n) const
{
_LIBCPP_ASSERT(__n < bucket_count(),
"unordered container::bucket_size(n) called with n >= bucket_count()");
__node_const_pointer __np = __bucket_list_[__n];
size_type __bc = bucket_count();
size_type __r = 0;
if (__np != nullptr)
{
for (__np = __np->__next_; __np != nullptr &&
__constrain_hash(__np->__hash_, __bc) == __n;
__np = __np->__next_, ++__r)
;
}
return __r;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
inline _LIBCPP_INLINE_VISIBILITY
void
swap(__hash_table<_Tp, _Hash, _Equal, _Alloc>& __x,
__hash_table<_Tp, _Hash, _Equal, _Alloc>& __y)
_NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))
{
__x.swap(__y);
}
#if _LIBCPP_DEBUG_LEVEL >= 2
template <class _Tp, class _Hash, class _Equal, class _Alloc>
bool
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__dereferenceable(const const_iterator* __i) const
{
return __i->__node_ != nullptr;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
bool
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__decrementable(const const_iterator*) const
{
return false;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
bool
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__addable(const const_iterator*, ptrdiff_t) const
{
return false;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
bool
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__subscriptable(const const_iterator*, ptrdiff_t) const
{
return false;
}
#endif // _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP__HASH_TABLE
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