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cxx/include/__hash_table
Dimitry Andric 8966350d61 Fix warnings about pessimizing return moves for C++11 and higher 
Summary:
Throughout the libc++ headers, there are a few instances where
_VSTD::move() is used to return a local variable.  Howard commented in
r189039 that these were there "for non-obvious reasons such as to help
things limp along in C++03 language mode".

However, when compiling these headers with warnings on, and in C++11 or
higher mode (like we do in FreeBSD), they cause the following complaints
about pessimizing moves:

    In file included from tests.cpp:26:
    In file included from tests.hpp:29:
    /usr/include/c++/v1/map:1368:12: error: moving a local object in a return statement prevents copy elision [-Werror,-Wpessimizing-move]
        return _VSTD::move(__h);  // explicitly moved for C++03
               ^
    /usr/include/c++/v1/__config:368:15: note: expanded from macro '_VSTD'
    #define _VSTD std::_LIBCPP_NAMESPACE
                  ^

Attempt to fix this by adding a _LIBCPP_EXPLICIT_MOVE() macro to
__config, which gets defined to _VSTD::move for pre-C++11, and to
nothing for C++11 and later.

I am not completely satisfied with the macro name (I also considered
_LIBCPP_COMPAT_MOVE and some other variants), so suggestions are
welcome. :)

Reviewers: mclow.lists, howard.hinnant, EricWF

Subscribers: arthur.j.odwyer, cfe-commits

Differential Revision: http://reviews.llvm.org/D11394

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@245421 91177308-0d34-0410-b5e6-96231b3b80d8
2015-08-19 06:43:33 +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 <__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
_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 pointer_traits<_VoidPtr>::template
#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
rebind<__hash_node<_Tp, _VoidPtr> >
#else
rebind<__hash_node<_Tp, _VoidPtr> >::other
#endif
>
{
typedef _Tp value_type;
size_t __hash_;
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));
}
template <class _Tp, class _Hash, class _Equal, class _Alloc> class __hash_table;
template <class _ConstNodePtr> class _LIBCPP_TYPE_VIS_ONLY __hash_const_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 _NodePtr>
class _LIBCPP_TYPE_VIS_ONLY __hash_iterator
{
typedef _NodePtr __node_pointer;
__node_pointer __node_;
public:
typedef forward_iterator_tag iterator_category;
typedef typename pointer_traits<__node_pointer>::element_type::value_type value_type;
typedef typename pointer_traits<__node_pointer>::difference_type difference_type;
typedef value_type& reference;
typedef typename pointer_traits<__node_pointer>::template
#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
rebind<value_type>
#else
rebind<value_type>::other
#endif
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 _ConstNodePtr>
class _LIBCPP_TYPE_VIS_ONLY __hash_const_iterator
{
typedef _ConstNodePtr __node_pointer;
__node_pointer __node_;
typedef typename remove_const<
typename pointer_traits<__node_pointer>::element_type
>::type __node;
public:
typedef forward_iterator_tag iterator_category;
typedef typename __node::value_type value_type;
typedef typename pointer_traits<__node_pointer>::difference_type difference_type;
typedef const value_type& reference;
typedef typename pointer_traits<__node_pointer>::template
#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
rebind<const value_type>
#else
rebind<const value_type>::other
#endif
pointer;
typedef typename pointer_traits<__node_pointer>::template
#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
rebind<__node>
#else
rebind<__node>::other
#endif
__non_const_node_pointer;
typedef __hash_iterator<__non_const_node_pointer> __non_const_iterator;
_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 _ConstNodePtr> class _LIBCPP_TYPE_VIS_ONLY __hash_const_local_iterator;
template <class _NodePtr>
class _LIBCPP_TYPE_VIS_ONLY __hash_local_iterator
{
typedef _NodePtr __node_pointer;
__node_pointer __node_;
size_t __bucket_;
size_t __bucket_count_;
typedef pointer_traits<__node_pointer> __pointer_traits;
public:
typedef forward_iterator_tag iterator_category;
typedef typename __pointer_traits::element_type::value_type value_type;
typedef typename __pointer_traits::difference_type difference_type;
typedef value_type& reference;
typedef typename __pointer_traits::template
#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
rebind<value_type>
#else
rebind<value_type>::other
#endif
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 _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 pointer_traits<__node_pointer>::template
#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
rebind<__non_const_node>
#else
rebind<__non_const_node>::other
#endif
__non_const_node_pointer;
typedef __hash_local_iterator<__non_const_node_pointer>
__non_const_iterator;
public:
typedef forward_iterator_tag iterator_category;
typedef typename remove_const<
typename __pointer_traits::element_type::value_type
>::type value_type;
typedef typename __pointer_traits::difference_type difference_type;
typedef const value_type& reference;
typedef typename __pointer_traits::template
#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
rebind<const value_type>
#else
rebind<const value_type>::other
#endif
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;
typedef typename __alloc_traits::value_type::value_type value_type;
public:
typedef typename __alloc_traits::pointer pointer;
private:
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_, _VSTD::addressof(__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;
public:
typedef value_type& reference;
typedef const value_type& const_reference;
typedef typename __alloc_traits::pointer pointer;
typedef typename __alloc_traits::const_pointer const_pointer;
typedef typename __alloc_traits::size_type size_type;
typedef typename __alloc_traits::difference_type difference_type;
public:
// Create __node
typedef __hash_node<value_type, typename __alloc_traits::void_pointer> __node;
typedef typename __rebind_alloc_helper<__alloc_traits, __node>::type __node_allocator;
typedef allocator_traits<__node_allocator> __node_traits;
typedef typename __node_traits::pointer __node_pointer;
typedef typename __node_traits::pointer __node_const_pointer;
typedef __hash_node_base<__node_pointer> __first_node;
typedef typename pointer_traits<__node_pointer>::template
#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
rebind<__first_node>
#else
rebind<__first_node>::other
#endif
__node_base_pointer;
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;
__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);
__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_HAS_NO_RVALUE_REFERENCES
__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_HAS_NO_RVALUE_REFERENCES
~__hash_table();
__hash_table& operator=(const __hash_table& __u);
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
__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);
#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
template <class... _Args>
pair<iterator, bool> __emplace_unique(_Args&&... __args);
template <class... _Args>
iterator __emplace_multi(_Args&&... __args);
template <class... _Args>
iterator __emplace_hint_multi(const_iterator __p, _Args&&... __args);
#endif // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
template <class _ValueTp>
_LIBCPP_INLINE_VISIBILITY
pair<iterator, bool> __insert_unique_value(_ValueTp&& __x);
#else
_LIBCPP_INLINE_VISIBILITY
pair<iterator, bool> __insert_unique_value(const value_type& __x);
#endif
pair<iterator, bool> __insert_unique(const value_type& __x);
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
pair<iterator, bool> __insert_unique(value_type&& __x);
template <class _Pp>
pair<iterator, bool> __insert_unique(_Pp&& __x);
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
template <class _Pp>
iterator __insert_multi(_Pp&& __x);
template <class _Pp>
iterator __insert_multi(const_iterator __p, _Pp&& __x);
#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
iterator __insert_multi(const value_type& __x);
iterator __insert_multi(const_iterator __p, const value_type& __x);
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
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();
}
iterator begin() _NOEXCEPT;
iterator end() _NOEXCEPT;
const_iterator begin() const _NOEXCEPT;
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>
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_HAS_NO_RVALUE_REFERENCES
#ifndef _LIBCPP_HAS_NO_VARIADICS
template <class ..._Args>
__node_holder __construct_node(_Args&& ...__args);
#endif // _LIBCPP_HAS_NO_VARIADICS
__node_holder __construct_node(value_type&& __v, size_t __hash);
#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
__node_holder __construct_node(const value_type& __v);
#endif
__node_holder __construct_node(const value_type& __v, size_t __hash);
_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) {}
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 {}
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 _LIBCPP_INLINE_VISIBILITY
__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<hasher>::value &&
is_nothrow_default_constructible<key_equal>::value)
: __p2_(0),
__p3_(1.0f)
{
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
inline _LIBCPP_INLINE_VISIBILITY
__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_HAS_NO_RVALUE_REFERENCES
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<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_HAS_NO_RVALUE_REFERENCES
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, _VSTD::addressof(__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_HAS_NO_RVALUE_REFERENCES
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(_VSTD::move(__u.remove(__i++)->__value_));
__node_insert_multi(__h.get());
__h.release();
}
}
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
inline _LIBCPP_INLINE_VISIBILITY
__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_HAS_NO_RVALUE_REFERENCES
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)
{
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)
{
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(*__first);
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
inline _LIBCPP_INLINE_VISIBILITY
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 _LIBCPP_INLINE_VISIBILITY
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 _LIBCPP_INLINE_VISIBILITY
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 _LIBCPP_INLINE_VISIBILITY
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);
}
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>::__insert_unique(const value_type& __x)
{
return __insert_unique_value(__x);
}
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _ValueTp>
_LIBCPP_INLINE_VISIBILITY
pair<typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator, bool>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__insert_unique_value(_ValueTp&& __x)
#else
template <class _Tp, class _Hash, class _Equal, class _Alloc>
_LIBCPP_INLINE_VISIBILITY
pair<typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator, bool>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__insert_unique_value(const value_type& __x)
#endif
{
#if defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
typedef const value_type& _ValueTp;
#endif
size_t __hash = hash_function()(__x);
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_, __x))
goto __done;
}
}
}
{
__node_holder __h = __construct_node(_VSTD::forward<_ValueTp>(__x), __hash);
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>(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_HAS_NO_RVALUE_REFERENCES
#ifndef _LIBCPP_HAS_NO_VARIADICS
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(_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;
}
#endif // _LIBCPP_HAS_NO_VARIADICS
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>::__insert_unique(value_type&& __x)
{
return __insert_unique_value(_VSTD::move(__x));
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Pp>
pair<typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator, bool>
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__insert_unique(_Pp&& __x)
{
__node_holder __h = __construct_node(_VSTD::forward<_Pp>(__x));
pair<iterator, bool> __r = __node_insert_unique(__h.get());
if (__r.second)
__h.release();
return __r;
}
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Pp>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__insert_multi(_Pp&& __x)
{
__node_holder __h = __construct_node(_VSTD::forward<_Pp>(__x));
iterator __r = __node_insert_multi(__h.get());
__h.release();
return __r;
}
template <class _Tp, class _Hash, class _Equal, class _Alloc>
template <class _Pp>
typename __hash_table<_Tp, _Hash, _Equal, _Alloc>::iterator
__hash_table<_Tp, _Hash, _Equal, _Alloc>::__insert_multi(const_iterator __p,
_Pp&& __x)
{
#if _LIBCPP_DEBUG_LEVEL >= 2
_LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
"unordered container::insert(const_iterator, rvalue) called with an iterator not"
" referring to this unordered container");
#endif
__node_holder __h = __construct_node(_VSTD::forward<_Pp>(__x));
iterator __r = __node_insert_multi(__p, __h.get());
__h.release();
return __r;
}
#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
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 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 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_HAS_NO_RVALUE_REFERENCES
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_HAS_NO_RVALUE_REFERENCES
#ifndef _LIBCPP_HAS_NO_VARIADICS
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)
{
__node_allocator& __na = __node_alloc();
__node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
__node_traits::construct(__na, _VSTD::addressof(__h->__value_), _VSTD::forward<_Args>(__args)...);
__h.get_deleter().__value_constructed = true;
__h->__hash_ = hash_function()(__h->__value_);
__h->__next_ = nullptr;
return __h;
}
#endif // _LIBCPP_HAS_NO_VARIADICS
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(value_type&& __v,
size_t __hash)
{
__node_allocator& __na = __node_alloc();
__node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
__node_traits::construct(__na, _VSTD::addressof(__h->__value_), _VSTD::move(__v));
__h.get_deleter().__value_constructed = true;
__h->__hash_ = __hash;
__h->__next_ = nullptr;
return __h;
}
#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
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 value_type& __v)
{
__node_allocator& __na = __node_alloc();
__node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
__node_traits::construct(__na, _VSTD::addressof(__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
}
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
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 value_type& __v,
size_t __hash)
{
__node_allocator& __na = __node_alloc();
__node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
__node_traits::construct(__na, _VSTD::addressof(__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
}
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 _LIBCPP_INLINE_VISIBILITY
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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