hash_set
Go to the documentation of this file.
// Hashing set implementation -*- C++ -*-
// Copyright (C) 2001-2021 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
/*
* Copyright (c) 1996
* Silicon Graphics Computer Systems, Inc.
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Silicon Graphics makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
*
* Copyright (c) 1994
* Hewlett-Packard Company
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Hewlett-Packard Company makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
*/
/** @file backward/hash_set
* This file is a GNU extension to the Standard C++ Library (possibly
* containing extensions from the HP/SGI STL subset).
*/
#ifndef _BACKWARD_HASH_SET
#define _BACKWARD_HASH_SET 1
#ifndef _GLIBCXX_PERMIT_BACKWARD_HASH
#include <backward/backward_warning.h>
#endif
#include <bits/c++config.h>
#include <backward/hashtable.h>
#include <bits/concept_check.h>
namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
using std::equal_to;
using std::allocator;
using std::pair;
using std::_Identity;
/**
* This is an SGI extension.
* @ingroup SGIextensions
* @doctodo
*/
template<class _Value, class _HashFcn = hash<_Value>,
class _EqualKey = equal_to<_Value>,
class _Alloc = allocator<_Value> >
class hash_set
{
// concept requirements
__glibcxx_class_requires(_Value, _SGIAssignableConcept)
__glibcxx_class_requires3(_HashFcn, size_t, _Value, _UnaryFunctionConcept)
__glibcxx_class_requires3(_EqualKey, _Value, _Value, _BinaryPredicateConcept)
typedef __alloc_traits<_Alloc> _Alloc_traits;
private:
typedef hashtable<_Value, _Value, _HashFcn, _Identity<_Value>,
_EqualKey, _Alloc> _Ht;
_Ht _M_ht;
public:
typedef typename _Ht::key_type key_type;
typedef typename _Ht::value_type value_type;
typedef typename _Ht::hasher hasher;
typedef typename _Ht::key_equal key_equal;
typedef typename _Ht::size_type size_type;
typedef typename _Ht::difference_type difference_type;
typedef typename _Alloc_traits::pointer pointer;
typedef typename _Alloc_traits::const_pointer const_pointer;
typedef typename _Alloc_traits::reference reference;
typedef typename _Alloc_traits::const_reference const_reference;
typedef typename _Ht::const_iterator iterator;
typedef typename _Ht::const_iterator const_iterator;
typedef typename _Ht::allocator_type allocator_type;
hasher
hash_funct() const
{ return _M_ht.hash_funct(); }
key_equal
key_eq() const
{ return _M_ht.key_eq(); }
allocator_type
get_allocator() const
{ return _M_ht.get_allocator(); }
hash_set()
: _M_ht(100, hasher(), key_equal(), allocator_type()) {}
explicit
hash_set(size_type __n)
: _M_ht(__n, hasher(), key_equal(), allocator_type()) {}
hash_set(size_type __n, const hasher& __hf)
: _M_ht(__n, __hf, key_equal(), allocator_type()) {}
hash_set(size_type __n, const hasher& __hf, const key_equal& __eql,
const allocator_type& __a = allocator_type())
: _M_ht(__n, __hf, __eql, __a) {}
template<class _InputIterator>
hash_set(_InputIterator __f, _InputIterator __l)
: _M_ht(100, hasher(), key_equal(), allocator_type())
{ _M_ht.insert_unique(__f, __l); }
template<class _InputIterator>
hash_set(_InputIterator __f, _InputIterator __l, size_type __n)
: _M_ht(__n, hasher(), key_equal(), allocator_type())
{ _M_ht.insert_unique(__f, __l); }
template<class _InputIterator>
hash_set(_InputIterator __f, _InputIterator __l, size_type __n,
const hasher& __hf)
: _M_ht(__n, __hf, key_equal(), allocator_type())
{ _M_ht.insert_unique(__f, __l); }
template<class _InputIterator>
hash_set(_InputIterator __f, _InputIterator __l, size_type __n,
const hasher& __hf, const key_equal& __eql,
const allocator_type& __a = allocator_type())
: _M_ht(__n, __hf, __eql, __a)
{ _M_ht.insert_unique(__f, __l); }
size_type
size() const
{ return _M_ht.size(); }
size_type
max_size() const
{ return _M_ht.max_size(); }
_GLIBCXX_NODISCARD bool
empty() const
{ return _M_ht.empty(); }
void
swap(hash_set& __hs)
{ _M_ht.swap(__hs._M_ht); }
template<class _Val, class _HF, class _EqK, class _Al>
friend bool
operator==(const hash_set<_Val, _HF, _EqK, _Al>&,
const hash_set<_Val, _HF, _EqK, _Al>&);
iterator
begin() const
{ return _M_ht.begin(); }
iterator
end() const
{ return _M_ht.end(); }
pair<iterator, bool>
insert(const value_type& __obj)
{
pair<typename _Ht::iterator, bool> __p = _M_ht.insert_unique(__obj);
return pair<iterator,bool>(__p.first, __p.second);
}
template<class _InputIterator>
void
insert(_InputIterator __f, _InputIterator __l)
{ _M_ht.insert_unique(__f, __l); }
pair<iterator, bool>
insert_noresize(const value_type& __obj)
{
pair<typename _Ht::iterator, bool> __p
= _M_ht.insert_unique_noresize(__obj);
return pair<iterator, bool>(__p.first, __p.second);
}
iterator
find(const key_type& __key) const
{ return _M_ht.find(__key); }
size_type
count(const key_type& __key) const
{ return _M_ht.count(__key); }
pair<iterator, iterator>
equal_range(const key_type& __key) const
{ return _M_ht.equal_range(__key); }
size_type
erase(const key_type& __key)
{return _M_ht.erase(__key); }
void
erase(iterator __it)
{ _M_ht.erase(__it); }
void
erase(iterator __f, iterator __l)
{ _M_ht.erase(__f, __l); }
void
clear()
{ _M_ht.clear(); }
void
resize(size_type __hint)
{ _M_ht.resize(__hint); }
size_type
bucket_count() const
{ return _M_ht.bucket_count(); }
size_type
max_bucket_count() const
{ return _M_ht.max_bucket_count(); }
size_type
elems_in_bucket(size_type __n) const
{ return _M_ht.elems_in_bucket(__n); }
};
template<class _Value, class _HashFcn, class _EqualKey, class _Alloc>
inline bool
operator==(const hash_set<_Value, _HashFcn, _EqualKey, _Alloc>& __hs1,
const hash_set<_Value, _HashFcn, _EqualKey, _Alloc>& __hs2)
{ return __hs1._M_ht == __hs2._M_ht; }
template<class _Value, class _HashFcn, class _EqualKey, class _Alloc>
inline bool
operator!=(const hash_set<_Value, _HashFcn, _EqualKey, _Alloc>& __hs1,
const hash_set<_Value, _HashFcn, _EqualKey, _Alloc>& __hs2)
{ return !(__hs1 == __hs2); }
template<class _Val, class _HashFcn, class _EqualKey, class _Alloc>
inline void
swap(hash_set<_Val, _HashFcn, _EqualKey, _Alloc>& __hs1,
hash_set<_Val, _HashFcn, _EqualKey, _Alloc>& __hs2)
{ __hs1.swap(__hs2); }
/**
* This is an SGI extension.
* @ingroup SGIextensions
* @doctodo
*/
template<class _Value,
class _HashFcn = hash<_Value>,
class _EqualKey = equal_to<_Value>,
class _Alloc = allocator<_Value> >
class hash_multiset
{
// concept requirements
__glibcxx_class_requires(_Value, _SGIAssignableConcept)
__glibcxx_class_requires3(_HashFcn, size_t, _Value, _UnaryFunctionConcept)
__glibcxx_class_requires3(_EqualKey, _Value, _Value, _BinaryPredicateConcept)
private:
typedef hashtable<_Value, _Value, _HashFcn, _Identity<_Value>,
_EqualKey, _Alloc> _Ht;
_Ht _M_ht;
public:
typedef typename _Ht::key_type key_type;
typedef typename _Ht::value_type value_type;
typedef typename _Ht::hasher hasher;
typedef typename _Ht::key_equal key_equal;
typedef typename _Ht::size_type size_type;
typedef typename _Ht::difference_type difference_type;
typedef typename _Alloc::pointer pointer;
typedef typename _Alloc::const_pointer const_pointer;
typedef typename _Alloc::reference reference;
typedef typename _Alloc::const_reference const_reference;
typedef typename _Ht::const_iterator iterator;
typedef typename _Ht::const_iterator const_iterator;
typedef typename _Ht::allocator_type allocator_type;
hasher
hash_funct() const
{ return _M_ht.hash_funct(); }
key_equal
key_eq() const
{ return _M_ht.key_eq(); }
allocator_type
get_allocator() const
{ return _M_ht.get_allocator(); }
hash_multiset()
: _M_ht(100, hasher(), key_equal(), allocator_type()) {}
explicit
hash_multiset(size_type __n)
: _M_ht(__n, hasher(), key_equal(), allocator_type()) {}
hash_multiset(size_type __n, const hasher& __hf)
: _M_ht(__n, __hf, key_equal(), allocator_type()) {}
hash_multiset(size_type __n, const hasher& __hf, const key_equal& __eql,
const allocator_type& __a = allocator_type())
: _M_ht(__n, __hf, __eql, __a) {}
template<class _InputIterator>
hash_multiset(_InputIterator __f, _InputIterator __l)
: _M_ht(100, hasher(), key_equal(), allocator_type())
{ _M_ht.insert_equal(__f, __l); }
template<class _InputIterator>
hash_multiset(_InputIterator __f, _InputIterator __l, size_type __n)
: _M_ht(__n, hasher(), key_equal(), allocator_type())
{ _M_ht.insert_equal(__f, __l); }
template<class _InputIterator>
hash_multiset(_InputIterator __f, _InputIterator __l, size_type __n,
const hasher& __hf)
: _M_ht(__n, __hf, key_equal(), allocator_type())
{ _M_ht.insert_equal(__f, __l); }
template<class _InputIterator>
hash_multiset(_InputIterator __f, _InputIterator __l, size_type __n,
const hasher& __hf, const key_equal& __eql,
const allocator_type& __a = allocator_type())
: _M_ht(__n, __hf, __eql, __a)
{ _M_ht.insert_equal(__f, __l); }
size_type
size() const
{ return _M_ht.size(); }
size_type
max_size() const
{ return _M_ht.max_size(); }
_GLIBCXX_NODISCARD bool
empty() const
{ return _M_ht.empty(); }
void
swap(hash_multiset& hs)
{ _M_ht.swap(hs._M_ht); }
template<class _Val, class _HF, class _EqK, class _Al>
friend bool
operator==(const hash_multiset<_Val, _HF, _EqK, _Al>&,
const hash_multiset<_Val, _HF, _EqK, _Al>&);
iterator
begin() const
{ return _M_ht.begin(); }
iterator
end() const
{ return _M_ht.end(); }
iterator
insert(const value_type& __obj)
{ return _M_ht.insert_equal(__obj); }
template<class _InputIterator>
void
insert(_InputIterator __f, _InputIterator __l)
{ _M_ht.insert_equal(__f,__l); }
iterator
insert_noresize(const value_type& __obj)
{ return _M_ht.insert_equal_noresize(__obj); }
iterator
find(const key_type& __key) const
{ return _M_ht.find(__key); }
size_type
count(const key_type& __key) const
{ return _M_ht.count(__key); }
pair<iterator, iterator>
equal_range(const key_type& __key) const
{ return _M_ht.equal_range(__key); }
size_type
erase(const key_type& __key)
{ return _M_ht.erase(__key); }
void
erase(iterator __it)
{ _M_ht.erase(__it); }
void
erase(iterator __f, iterator __l)
{ _M_ht.erase(__f, __l); }
void
clear()
{ _M_ht.clear(); }
void
resize(size_type __hint)
{ _M_ht.resize(__hint); }
size_type
bucket_count() const
{ return _M_ht.bucket_count(); }
size_type
max_bucket_count() const
{ return _M_ht.max_bucket_count(); }
size_type
elems_in_bucket(size_type __n) const
{ return _M_ht.elems_in_bucket(__n); }
};
template<class _Val, class _HashFcn, class _EqualKey, class _Alloc>
inline bool
operator==(const hash_multiset<_Val, _HashFcn, _EqualKey, _Alloc>& __hs1,
const hash_multiset<_Val, _HashFcn, _EqualKey, _Alloc>& __hs2)
{ return __hs1._M_ht == __hs2._M_ht; }
template<class _Val, class _HashFcn, class _EqualKey, class _Alloc>
inline bool
operator!=(const hash_multiset<_Val, _HashFcn, _EqualKey, _Alloc>& __hs1,
const hash_multiset<_Val, _HashFcn, _EqualKey, _Alloc>& __hs2)
{ return !(__hs1 == __hs2); }
template<class _Val, class _HashFcn, class _EqualKey, class _Alloc>
inline void
swap(hash_multiset<_Val, _HashFcn, _EqualKey, _Alloc>& __hs1,
hash_multiset<_Val, _HashFcn, _EqualKey, _Alloc>& __hs2)
{ __hs1.swap(__hs2); }
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
// Specialization of insert_iterator so that it will work for hash_set
// and hash_multiset.
template<class _Value, class _HashFcn, class _EqualKey, class _Alloc>
class insert_iterator<__gnu_cxx::hash_set<_Value, _HashFcn,
_EqualKey, _Alloc> >
{
protected:
typedef __gnu_cxx::hash_set<_Value, _HashFcn, _EqualKey, _Alloc>
_Container;
_Container* container;
public:
typedef _Container container_type;
typedef output_iterator_tag iterator_category;
typedef void value_type;
typedef void difference_type;
typedef void pointer;
typedef void reference;
insert_iterator(_Container& __x)
: container(&__x) {}
insert_iterator(_Container& __x, typename _Container::iterator)
: container(&__x) {}
insert_iterator<_Container>&
operator=(const typename _Container::value_type& __value)
{
container->insert(__value);
return *this;
}
insert_iterator<_Container>&
operator*()
{ return *this; }
insert_iterator<_Container>&
operator++()
{ return *this; }
insert_iterator<_Container>&
operator++(int)
{ return *this; }
};
template<class _Value, class _HashFcn, class _EqualKey, class _Alloc>
class insert_iterator<__gnu_cxx::hash_multiset<_Value, _HashFcn,
_EqualKey, _Alloc> >
{
protected:
typedef __gnu_cxx::hash_multiset<_Value, _HashFcn, _EqualKey, _Alloc>
_Container;
_Container* container;
typename _Container::iterator iter;
public:
typedef _Container container_type;
typedef output_iterator_tag iterator_category;
typedef void value_type;
typedef void difference_type;
typedef void pointer;
typedef void reference;
insert_iterator(_Container& __x)
: container(&__x) {}
insert_iterator(_Container& __x, typename _Container::iterator)
: container(&__x) {}
insert_iterator<_Container>&
operator=(const typename _Container::value_type& __value)
{
container->insert(__value);
return *this;
}
insert_iterator<_Container>&
operator*()
{ return *this; }
insert_iterator<_Container>&
operator++()
{ return *this; }
insert_iterator<_Container>&
operator++(int) { return *this; }
};
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
#endif