961 lines
36 KiB
C++
961 lines
36 KiB
C++
// Multimap implementation -*- C++ -*-
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// Copyright (C) 2001-2014 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/*
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*
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* Copyright (c) 1994
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* Hewlett-Packard Company
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Hewlett-Packard Company makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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*
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* Copyright (c) 1996,1997
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* Silicon Graphics Computer Systems, Inc.
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Silicon Graphics makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*/
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/** @file bits/stl_multimap.h
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* This is an internal header file, included by other library headers.
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* Do not attempt to use it directly. @headername{map}
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*/
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#ifndef _STL_MULTIMAP_H
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#define _STL_MULTIMAP_H 1
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#include <bits/concept_check.h>
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#if __cplusplus >= 201103L
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#include <initializer_list>
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#endif
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_CONTAINER
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/**
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* @brief A standard container made up of (key,value) pairs, which can be
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* retrieved based on a key, in logarithmic time.
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*
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* @ingroup associative_containers
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*
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* @tparam _Key Type of key objects.
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* @tparam _Tp Type of mapped objects.
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* @tparam _Compare Comparison function object type, defaults to less<_Key>.
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* @tparam _Alloc Allocator type, defaults to
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* allocator<pair<const _Key, _Tp>.
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*
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* Meets the requirements of a <a href="tables.html#65">container</a>, a
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* <a href="tables.html#66">reversible container</a>, and an
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* <a href="tables.html#69">associative container</a> (using equivalent
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* keys). For a @c multimap<Key,T> the key_type is Key, the mapped_type
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* is T, and the value_type is std::pair<const Key,T>.
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*
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* Multimaps support bidirectional iterators.
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*
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* The private tree data is declared exactly the same way for map and
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* multimap; the distinction is made entirely in how the tree functions are
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* called (*_unique versus *_equal, same as the standard).
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*/
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template <typename _Key, typename _Tp,
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typename _Compare = std::less<_Key>,
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typename _Alloc = std::allocator<std::pair<const _Key, _Tp> > >
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class multimap
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{
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public:
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typedef _Key key_type;
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typedef _Tp mapped_type;
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typedef std::pair<const _Key, _Tp> value_type;
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typedef _Compare key_compare;
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typedef _Alloc allocator_type;
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private:
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// concept requirements
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typedef typename _Alloc::value_type _Alloc_value_type;
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__glibcxx_class_requires(_Tp, _SGIAssignableConcept)
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__glibcxx_class_requires4(_Compare, bool, _Key, _Key,
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_BinaryFunctionConcept)
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__glibcxx_class_requires2(value_type, _Alloc_value_type, _SameTypeConcept)
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public:
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class value_compare
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: public std::binary_function<value_type, value_type, bool>
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{
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friend class multimap<_Key, _Tp, _Compare, _Alloc>;
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protected:
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_Compare comp;
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value_compare(_Compare __c)
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: comp(__c) { }
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public:
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bool operator()(const value_type& __x, const value_type& __y) const
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{ return comp(__x.first, __y.first); }
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};
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private:
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/// This turns a red-black tree into a [multi]map.
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typedef typename __gnu_cxx::__alloc_traits<_Alloc>::template
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rebind<value_type>::other _Pair_alloc_type;
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typedef _Rb_tree<key_type, value_type, _Select1st<value_type>,
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key_compare, _Pair_alloc_type> _Rep_type;
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/// The actual tree structure.
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_Rep_type _M_t;
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typedef __gnu_cxx::__alloc_traits<_Pair_alloc_type> _Alloc_traits;
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public:
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// many of these are specified differently in ISO, but the following are
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// "functionally equivalent"
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typedef typename _Alloc_traits::pointer pointer;
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typedef typename _Alloc_traits::const_pointer const_pointer;
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typedef typename _Alloc_traits::reference reference;
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typedef typename _Alloc_traits::const_reference const_reference;
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typedef typename _Rep_type::iterator iterator;
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typedef typename _Rep_type::const_iterator const_iterator;
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typedef typename _Rep_type::size_type size_type;
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typedef typename _Rep_type::difference_type difference_type;
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typedef typename _Rep_type::reverse_iterator reverse_iterator;
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typedef typename _Rep_type::const_reverse_iterator const_reverse_iterator;
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// [23.3.2] construct/copy/destroy
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// (get_allocator() is also listed in this section)
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/**
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* @brief Default constructor creates no elements.
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*/
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multimap()
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: _M_t() { }
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/**
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* @brief Creates a %multimap with no elements.
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* @param __comp A comparison object.
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* @param __a An allocator object.
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*/
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explicit
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multimap(const _Compare& __comp,
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const allocator_type& __a = allocator_type())
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: _M_t(__comp, _Pair_alloc_type(__a)) { }
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/**
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* @brief %Multimap copy constructor.
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* @param __x A %multimap of identical element and allocator types.
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*
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* The newly-created %multimap uses a copy of the allocation object
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* used by @a __x.
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*/
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multimap(const multimap& __x)
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: _M_t(__x._M_t) { }
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#if __cplusplus >= 201103L
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/**
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* @brief %Multimap move constructor.
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* @param __x A %multimap of identical element and allocator types.
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*
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* The newly-created %multimap contains the exact contents of @a __x.
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* The contents of @a __x are a valid, but unspecified %multimap.
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*/
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multimap(multimap&& __x)
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noexcept(is_nothrow_copy_constructible<_Compare>::value)
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: _M_t(std::move(__x._M_t)) { }
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/**
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* @brief Builds a %multimap from an initializer_list.
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* @param __l An initializer_list.
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* @param __comp A comparison functor.
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* @param __a An allocator object.
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*
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* Create a %multimap consisting of copies of the elements from
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* the initializer_list. This is linear in N if the list is already
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* sorted, and NlogN otherwise (where N is @a __l.size()).
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*/
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multimap(initializer_list<value_type> __l,
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const _Compare& __comp = _Compare(),
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const allocator_type& __a = allocator_type())
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: _M_t(__comp, _Pair_alloc_type(__a))
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{ _M_t._M_insert_equal(__l.begin(), __l.end()); }
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/// Allocator-extended default constructor.
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explicit
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multimap(const allocator_type& __a)
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: _M_t(_Compare(), _Pair_alloc_type(__a)) { }
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/// Allocator-extended copy constructor.
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multimap(const multimap& __m, const allocator_type& __a)
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: _M_t(__m._M_t, _Pair_alloc_type(__a)) { }
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/// Allocator-extended move constructor.
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multimap(multimap&& __m, const allocator_type& __a)
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noexcept(is_nothrow_copy_constructible<_Compare>::value
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&& _Alloc_traits::_S_always_equal())
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: _M_t(std::move(__m._M_t), _Pair_alloc_type(__a)) { }
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/// Allocator-extended initialier-list constructor.
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multimap(initializer_list<value_type> __l, const allocator_type& __a)
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: _M_t(_Compare(), _Pair_alloc_type(__a))
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{ _M_t._M_insert_equal(__l.begin(), __l.end()); }
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/// Allocator-extended range constructor.
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template<typename _InputIterator>
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multimap(_InputIterator __first, _InputIterator __last,
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const allocator_type& __a)
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: _M_t(_Compare(), _Pair_alloc_type(__a))
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{ _M_t._M_insert_equal(__first, __last); }
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#endif
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/**
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* @brief Builds a %multimap from a range.
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* @param __first An input iterator.
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* @param __last An input iterator.
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*
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* Create a %multimap consisting of copies of the elements from
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* [__first,__last). This is linear in N if the range is already sorted,
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* and NlogN otherwise (where N is distance(__first,__last)).
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*/
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template<typename _InputIterator>
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multimap(_InputIterator __first, _InputIterator __last)
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: _M_t()
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{ _M_t._M_insert_equal(__first, __last); }
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/**
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* @brief Builds a %multimap from a range.
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* @param __first An input iterator.
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* @param __last An input iterator.
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* @param __comp A comparison functor.
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* @param __a An allocator object.
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*
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* Create a %multimap consisting of copies of the elements from
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* [__first,__last). This is linear in N if the range is already sorted,
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* and NlogN otherwise (where N is distance(__first,__last)).
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*/
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template<typename _InputIterator>
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multimap(_InputIterator __first, _InputIterator __last,
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const _Compare& __comp,
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const allocator_type& __a = allocator_type())
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: _M_t(__comp, _Pair_alloc_type(__a))
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{ _M_t._M_insert_equal(__first, __last); }
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// FIXME There is no dtor declared, but we should have something generated
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// by Doxygen. I don't know what tags to add to this paragraph to make
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// that happen:
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/**
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* The dtor only erases the elements, and note that if the elements
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* themselves are pointers, the pointed-to memory is not touched in any
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* way. Managing the pointer is the user's responsibility.
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*/
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/**
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* @brief %Multimap assignment operator.
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* @param __x A %multimap of identical element and allocator types.
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*
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* All the elements of @a __x are copied, but unlike the copy
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* constructor, the allocator object is not copied.
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*/
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multimap&
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operator=(const multimap& __x)
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{
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_M_t = __x._M_t;
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return *this;
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}
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#if __cplusplus >= 201103L
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/**
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* @brief %Multimap move assignment operator.
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* @param __x A %multimap of identical element and allocator types.
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*
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* The contents of @a __x are moved into this multimap (without copying).
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* @a __x is a valid, but unspecified multimap.
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*/
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multimap&
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operator=(multimap&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
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{
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if (!_M_t._M_move_assign(__x._M_t))
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{
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// The rvalue's allocator cannot be moved and is not equal,
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// so we need to individually move each element.
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clear();
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insert(std::__make_move_if_noexcept_iterator(__x.begin()),
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std::__make_move_if_noexcept_iterator(__x.end()));
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__x.clear();
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}
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return *this;
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}
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/**
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* @brief %Multimap list assignment operator.
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* @param __l An initializer_list.
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*
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* This function fills a %multimap with copies of the elements
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* in the initializer list @a __l.
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*
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* Note that the assignment completely changes the %multimap and
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* that the resulting %multimap's size is the same as the number
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* of elements assigned. Old data may be lost.
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*/
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multimap&
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operator=(initializer_list<value_type> __l)
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{
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this->clear();
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this->insert(__l.begin(), __l.end());
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return *this;
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}
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#endif
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/// Get a copy of the memory allocation object.
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allocator_type
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get_allocator() const _GLIBCXX_NOEXCEPT
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{ return allocator_type(_M_t.get_allocator()); }
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// iterators
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/**
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* Returns a read/write iterator that points to the first pair in the
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* %multimap. Iteration is done in ascending order according to the
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* keys.
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*/
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iterator
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begin() _GLIBCXX_NOEXCEPT
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{ return _M_t.begin(); }
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/**
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* Returns a read-only (constant) iterator that points to the first pair
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* in the %multimap. Iteration is done in ascending order according to
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* the keys.
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*/
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const_iterator
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begin() const _GLIBCXX_NOEXCEPT
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{ return _M_t.begin(); }
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/**
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* Returns a read/write iterator that points one past the last pair in
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* the %multimap. Iteration is done in ascending order according to the
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* keys.
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*/
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iterator
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end() _GLIBCXX_NOEXCEPT
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{ return _M_t.end(); }
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/**
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* Returns a read-only (constant) iterator that points one past the last
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* pair in the %multimap. Iteration is done in ascending order according
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* to the keys.
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*/
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const_iterator
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end() const _GLIBCXX_NOEXCEPT
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{ return _M_t.end(); }
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/**
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* Returns a read/write reverse iterator that points to the last pair in
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* the %multimap. Iteration is done in descending order according to the
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* keys.
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*/
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reverse_iterator
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rbegin() _GLIBCXX_NOEXCEPT
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{ return _M_t.rbegin(); }
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/**
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* Returns a read-only (constant) reverse iterator that points to the
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* last pair in the %multimap. Iteration is done in descending order
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* according to the keys.
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*/
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const_reverse_iterator
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rbegin() const _GLIBCXX_NOEXCEPT
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{ return _M_t.rbegin(); }
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/**
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* Returns a read/write reverse iterator that points to one before the
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* first pair in the %multimap. Iteration is done in descending order
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* according to the keys.
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*/
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reverse_iterator
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rend() _GLIBCXX_NOEXCEPT
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{ return _M_t.rend(); }
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/**
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* Returns a read-only (constant) reverse iterator that points to one
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* before the first pair in the %multimap. Iteration is done in
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* descending order according to the keys.
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*/
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const_reverse_iterator
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rend() const _GLIBCXX_NOEXCEPT
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{ return _M_t.rend(); }
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#if __cplusplus >= 201103L
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/**
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* Returns a read-only (constant) iterator that points to the first pair
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* in the %multimap. Iteration is done in ascending order according to
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* the keys.
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*/
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const_iterator
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cbegin() const noexcept
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{ return _M_t.begin(); }
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/**
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* Returns a read-only (constant) iterator that points one past the last
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* pair in the %multimap. Iteration is done in ascending order according
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* to the keys.
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*/
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const_iterator
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cend() const noexcept
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{ return _M_t.end(); }
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/**
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* Returns a read-only (constant) reverse iterator that points to the
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* last pair in the %multimap. Iteration is done in descending order
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* according to the keys.
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*/
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const_reverse_iterator
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crbegin() const noexcept
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{ return _M_t.rbegin(); }
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/**
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* Returns a read-only (constant) reverse iterator that points to one
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* before the first pair in the %multimap. Iteration is done in
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* descending order according to the keys.
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*/
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const_reverse_iterator
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crend() const noexcept
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{ return _M_t.rend(); }
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#endif
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// capacity
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/** Returns true if the %multimap is empty. */
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bool
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empty() const _GLIBCXX_NOEXCEPT
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{ return _M_t.empty(); }
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/** Returns the size of the %multimap. */
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size_type
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size() const _GLIBCXX_NOEXCEPT
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{ return _M_t.size(); }
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/** Returns the maximum size of the %multimap. */
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size_type
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max_size() const _GLIBCXX_NOEXCEPT
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{ return _M_t.max_size(); }
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// modifiers
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#if __cplusplus >= 201103L
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/**
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* @brief Build and insert a std::pair into the %multimap.
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*
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* @param __args Arguments used to generate a new pair instance (see
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* std::piecewise_contruct for passing arguments to each
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* part of the pair constructor).
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*
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* @return An iterator that points to the inserted (key,value) pair.
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*
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* This function builds and inserts a (key, value) %pair into the
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* %multimap.
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* Contrary to a std::map the %multimap does not rely on unique keys and
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* thus multiple pairs with the same key can be inserted.
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*
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* Insertion requires logarithmic time.
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*/
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template<typename... _Args>
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iterator
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emplace(_Args&&... __args)
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{ return _M_t._M_emplace_equal(std::forward<_Args>(__args)...); }
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/**
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* @brief Builds and inserts a std::pair into the %multimap.
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*
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* @param __pos An iterator that serves as a hint as to where the pair
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* should be inserted.
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* @param __args Arguments used to generate a new pair instance (see
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* std::piecewise_contruct for passing arguments to each
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* part of the pair constructor).
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* @return An iterator that points to the inserted (key,value) pair.
|
|
*
|
|
* This function inserts a (key, value) pair into the %multimap.
|
|
* Contrary to a std::map the %multimap does not rely on unique keys and
|
|
* thus multiple pairs with the same key can be inserted.
|
|
* Note that the first parameter is only a hint and can potentially
|
|
* improve the performance of the insertion process. A bad hint would
|
|
* cause no gains in efficiency.
|
|
*
|
|
* For more on @a hinting, see:
|
|
* http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt07ch17.html
|
|
*
|
|
* Insertion requires logarithmic time (if the hint is not taken).
|
|
*/
|
|
template<typename... _Args>
|
|
iterator
|
|
emplace_hint(const_iterator __pos, _Args&&... __args)
|
|
{
|
|
return _M_t._M_emplace_hint_equal(__pos,
|
|
std::forward<_Args>(__args)...);
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* @brief Inserts a std::pair into the %multimap.
|
|
* @param __x Pair to be inserted (see std::make_pair for easy creation
|
|
* of pairs).
|
|
* @return An iterator that points to the inserted (key,value) pair.
|
|
*
|
|
* This function inserts a (key, value) pair into the %multimap.
|
|
* Contrary to a std::map the %multimap does not rely on unique keys and
|
|
* thus multiple pairs with the same key can be inserted.
|
|
*
|
|
* Insertion requires logarithmic time.
|
|
*/
|
|
iterator
|
|
insert(const value_type& __x)
|
|
{ return _M_t._M_insert_equal(__x); }
|
|
|
|
#if __cplusplus >= 201103L
|
|
template<typename _Pair, typename = typename
|
|
std::enable_if<std::is_constructible<value_type,
|
|
_Pair&&>::value>::type>
|
|
iterator
|
|
insert(_Pair&& __x)
|
|
{ return _M_t._M_insert_equal(std::forward<_Pair>(__x)); }
|
|
#endif
|
|
|
|
/**
|
|
* @brief Inserts a std::pair into the %multimap.
|
|
* @param __position An iterator that serves as a hint as to where the
|
|
* pair should be inserted.
|
|
* @param __x Pair to be inserted (see std::make_pair for easy creation
|
|
* of pairs).
|
|
* @return An iterator that points to the inserted (key,value) pair.
|
|
*
|
|
* This function inserts a (key, value) pair into the %multimap.
|
|
* Contrary to a std::map the %multimap does not rely on unique keys and
|
|
* thus multiple pairs with the same key can be inserted.
|
|
* Note that the first parameter is only a hint and can potentially
|
|
* improve the performance of the insertion process. A bad hint would
|
|
* cause no gains in efficiency.
|
|
*
|
|
* For more on @a hinting, see:
|
|
* http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt07ch17.html
|
|
*
|
|
* Insertion requires logarithmic time (if the hint is not taken).
|
|
*/
|
|
iterator
|
|
#if __cplusplus >= 201103L
|
|
insert(const_iterator __position, const value_type& __x)
|
|
#else
|
|
insert(iterator __position, const value_type& __x)
|
|
#endif
|
|
{ return _M_t._M_insert_equal_(__position, __x); }
|
|
|
|
#if __cplusplus >= 201103L
|
|
template<typename _Pair, typename = typename
|
|
std::enable_if<std::is_constructible<value_type,
|
|
_Pair&&>::value>::type>
|
|
iterator
|
|
insert(const_iterator __position, _Pair&& __x)
|
|
{ return _M_t._M_insert_equal_(__position,
|
|
std::forward<_Pair>(__x)); }
|
|
#endif
|
|
|
|
/**
|
|
* @brief A template function that attempts to insert a range
|
|
* of elements.
|
|
* @param __first Iterator pointing to the start of the range to be
|
|
* inserted.
|
|
* @param __last Iterator pointing to the end of the range.
|
|
*
|
|
* Complexity similar to that of the range constructor.
|
|
*/
|
|
template<typename _InputIterator>
|
|
void
|
|
insert(_InputIterator __first, _InputIterator __last)
|
|
{ _M_t._M_insert_equal(__first, __last); }
|
|
|
|
#if __cplusplus >= 201103L
|
|
/**
|
|
* @brief Attempts to insert a list of std::pairs into the %multimap.
|
|
* @param __l A std::initializer_list<value_type> of pairs to be
|
|
* inserted.
|
|
*
|
|
* Complexity similar to that of the range constructor.
|
|
*/
|
|
void
|
|
insert(initializer_list<value_type> __l)
|
|
{ this->insert(__l.begin(), __l.end()); }
|
|
#endif
|
|
|
|
#if __cplusplus >= 201103L
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// DR 130. Associative erase should return an iterator.
|
|
/**
|
|
* @brief Erases an element from a %multimap.
|
|
* @param __position An iterator pointing to the element to be erased.
|
|
* @return An iterator pointing to the element immediately following
|
|
* @a position prior to the element being erased. If no such
|
|
* element exists, end() is returned.
|
|
*
|
|
* This function erases an element, pointed to by the given iterator,
|
|
* from a %multimap. Note that this function only erases the element,
|
|
* and that if the element is itself a pointer, the pointed-to memory is
|
|
* not touched in any way. Managing the pointer is the user's
|
|
* responsibility.
|
|
*/
|
|
iterator
|
|
erase(const_iterator __position)
|
|
{ return _M_t.erase(__position); }
|
|
|
|
// LWG 2059.
|
|
_GLIBCXX_ABI_TAG_CXX11
|
|
iterator
|
|
erase(iterator __position)
|
|
{ return _M_t.erase(__position); }
|
|
#else
|
|
/**
|
|
* @brief Erases an element from a %multimap.
|
|
* @param __position An iterator pointing to the element to be erased.
|
|
*
|
|
* This function erases an element, pointed to by the given iterator,
|
|
* from a %multimap. Note that this function only erases the element,
|
|
* and that if the element is itself a pointer, the pointed-to memory is
|
|
* not touched in any way. Managing the pointer is the user's
|
|
* responsibility.
|
|
*/
|
|
void
|
|
erase(iterator __position)
|
|
{ _M_t.erase(__position); }
|
|
#endif
|
|
|
|
/**
|
|
* @brief Erases elements according to the provided key.
|
|
* @param __x Key of element to be erased.
|
|
* @return The number of elements erased.
|
|
*
|
|
* This function erases all elements located by the given key from a
|
|
* %multimap.
|
|
* Note that this function only erases the element, and that if
|
|
* the element is itself a pointer, the pointed-to memory is not touched
|
|
* in any way. Managing the pointer is the user's responsibility.
|
|
*/
|
|
size_type
|
|
erase(const key_type& __x)
|
|
{ return _M_t.erase(__x); }
|
|
|
|
#if __cplusplus >= 201103L
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// DR 130. Associative erase should return an iterator.
|
|
/**
|
|
* @brief Erases a [first,last) range of elements from a %multimap.
|
|
* @param __first Iterator pointing to the start of the range to be
|
|
* erased.
|
|
* @param __last Iterator pointing to the end of the range to be
|
|
* erased .
|
|
* @return The iterator @a __last.
|
|
*
|
|
* This function erases a sequence of elements from a %multimap.
|
|
* Note that this function only erases the elements, and that if
|
|
* the elements themselves are pointers, the pointed-to memory is not
|
|
* touched in any way. Managing the pointer is the user's
|
|
* responsibility.
|
|
*/
|
|
iterator
|
|
erase(const_iterator __first, const_iterator __last)
|
|
{ return _M_t.erase(__first, __last); }
|
|
#else
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// DR 130. Associative erase should return an iterator.
|
|
/**
|
|
* @brief Erases a [first,last) range of elements from a %multimap.
|
|
* @param __first Iterator pointing to the start of the range to be
|
|
* erased.
|
|
* @param __last Iterator pointing to the end of the range to
|
|
* be erased.
|
|
*
|
|
* This function erases a sequence of elements from a %multimap.
|
|
* Note that this function only erases the elements, and that if
|
|
* the elements themselves are pointers, the pointed-to memory is not
|
|
* touched in any way. Managing the pointer is the user's
|
|
* responsibility.
|
|
*/
|
|
void
|
|
erase(iterator __first, iterator __last)
|
|
{ _M_t.erase(__first, __last); }
|
|
#endif
|
|
|
|
/**
|
|
* @brief Swaps data with another %multimap.
|
|
* @param __x A %multimap of the same element and allocator types.
|
|
*
|
|
* This exchanges the elements between two multimaps in constant time.
|
|
* (It is only swapping a pointer, an integer, and an instance of
|
|
* the @c Compare type (which itself is often stateless and empty), so it
|
|
* should be quite fast.)
|
|
* Note that the global std::swap() function is specialized such that
|
|
* std::swap(m1,m2) will feed to this function.
|
|
*/
|
|
void
|
|
swap(multimap& __x)
|
|
#if __cplusplus >= 201103L
|
|
noexcept(_Alloc_traits::_S_nothrow_swap())
|
|
#endif
|
|
{ _M_t.swap(__x._M_t); }
|
|
|
|
/**
|
|
* Erases all elements in a %multimap. Note that this function only
|
|
* erases the elements, and that if the elements themselves are pointers,
|
|
* the pointed-to memory is not touched in any way. Managing the pointer
|
|
* is the user's responsibility.
|
|
*/
|
|
void
|
|
clear() _GLIBCXX_NOEXCEPT
|
|
{ _M_t.clear(); }
|
|
|
|
// observers
|
|
/**
|
|
* Returns the key comparison object out of which the %multimap
|
|
* was constructed.
|
|
*/
|
|
key_compare
|
|
key_comp() const
|
|
{ return _M_t.key_comp(); }
|
|
|
|
/**
|
|
* Returns a value comparison object, built from the key comparison
|
|
* object out of which the %multimap was constructed.
|
|
*/
|
|
value_compare
|
|
value_comp() const
|
|
{ return value_compare(_M_t.key_comp()); }
|
|
|
|
// multimap operations
|
|
/**
|
|
* @brief Tries to locate an element in a %multimap.
|
|
* @param __x Key of (key, value) pair to be located.
|
|
* @return Iterator pointing to sought-after element,
|
|
* or end() if not found.
|
|
*
|
|
* This function takes a key and tries to locate the element with which
|
|
* the key matches. If successful the function returns an iterator
|
|
* pointing to the sought after %pair. If unsuccessful it returns the
|
|
* past-the-end ( @c end() ) iterator.
|
|
*/
|
|
iterator
|
|
find(const key_type& __x)
|
|
{ return _M_t.find(__x); }
|
|
|
|
/**
|
|
* @brief Tries to locate an element in a %multimap.
|
|
* @param __x Key of (key, value) pair to be located.
|
|
* @return Read-only (constant) iterator pointing to sought-after
|
|
* element, or end() if not found.
|
|
*
|
|
* This function takes a key and tries to locate the element with which
|
|
* the key matches. If successful the function returns a constant
|
|
* iterator pointing to the sought after %pair. If unsuccessful it
|
|
* returns the past-the-end ( @c end() ) iterator.
|
|
*/
|
|
const_iterator
|
|
find(const key_type& __x) const
|
|
{ return _M_t.find(__x); }
|
|
|
|
/**
|
|
* @brief Finds the number of elements with given key.
|
|
* @param __x Key of (key, value) pairs to be located.
|
|
* @return Number of elements with specified key.
|
|
*/
|
|
size_type
|
|
count(const key_type& __x) const
|
|
{ return _M_t.count(__x); }
|
|
|
|
/**
|
|
* @brief Finds the beginning of a subsequence matching given key.
|
|
* @param __x Key of (key, value) pair to be located.
|
|
* @return Iterator pointing to first element equal to or greater
|
|
* than key, or end().
|
|
*
|
|
* This function returns the first element of a subsequence of elements
|
|
* that matches the given key. If unsuccessful it returns an iterator
|
|
* pointing to the first element that has a greater value than given key
|
|
* or end() if no such element exists.
|
|
*/
|
|
iterator
|
|
lower_bound(const key_type& __x)
|
|
{ return _M_t.lower_bound(__x); }
|
|
|
|
/**
|
|
* @brief Finds the beginning of a subsequence matching given key.
|
|
* @param __x Key of (key, value) pair to be located.
|
|
* @return Read-only (constant) iterator pointing to first element
|
|
* equal to or greater than key, or end().
|
|
*
|
|
* This function returns the first element of a subsequence of
|
|
* elements that matches the given key. If unsuccessful the
|
|
* iterator will point to the next greatest element or, if no
|
|
* such greater element exists, to end().
|
|
*/
|
|
const_iterator
|
|
lower_bound(const key_type& __x) const
|
|
{ return _M_t.lower_bound(__x); }
|
|
|
|
/**
|
|
* @brief Finds the end of a subsequence matching given key.
|
|
* @param __x Key of (key, value) pair to be located.
|
|
* @return Iterator pointing to the first element
|
|
* greater than key, or end().
|
|
*/
|
|
iterator
|
|
upper_bound(const key_type& __x)
|
|
{ return _M_t.upper_bound(__x); }
|
|
|
|
/**
|
|
* @brief Finds the end of a subsequence matching given key.
|
|
* @param __x Key of (key, value) pair to be located.
|
|
* @return Read-only (constant) iterator pointing to first iterator
|
|
* greater than key, or end().
|
|
*/
|
|
const_iterator
|
|
upper_bound(const key_type& __x) const
|
|
{ return _M_t.upper_bound(__x); }
|
|
|
|
/**
|
|
* @brief Finds a subsequence matching given key.
|
|
* @param __x Key of (key, value) pairs to be located.
|
|
* @return Pair of iterators that possibly points to the subsequence
|
|
* matching given key.
|
|
*
|
|
* This function is equivalent to
|
|
* @code
|
|
* std::make_pair(c.lower_bound(val),
|
|
* c.upper_bound(val))
|
|
* @endcode
|
|
* (but is faster than making the calls separately).
|
|
*/
|
|
std::pair<iterator, iterator>
|
|
equal_range(const key_type& __x)
|
|
{ return _M_t.equal_range(__x); }
|
|
|
|
/**
|
|
* @brief Finds a subsequence matching given key.
|
|
* @param __x Key of (key, value) pairs to be located.
|
|
* @return Pair of read-only (constant) iterators that possibly points
|
|
* to the subsequence matching given key.
|
|
*
|
|
* This function is equivalent to
|
|
* @code
|
|
* std::make_pair(c.lower_bound(val),
|
|
* c.upper_bound(val))
|
|
* @endcode
|
|
* (but is faster than making the calls separately).
|
|
*/
|
|
std::pair<const_iterator, const_iterator>
|
|
equal_range(const key_type& __x) const
|
|
{ return _M_t.equal_range(__x); }
|
|
|
|
template<typename _K1, typename _T1, typename _C1, typename _A1>
|
|
friend bool
|
|
operator==(const multimap<_K1, _T1, _C1, _A1>&,
|
|
const multimap<_K1, _T1, _C1, _A1>&);
|
|
|
|
template<typename _K1, typename _T1, typename _C1, typename _A1>
|
|
friend bool
|
|
operator<(const multimap<_K1, _T1, _C1, _A1>&,
|
|
const multimap<_K1, _T1, _C1, _A1>&);
|
|
};
|
|
|
|
/**
|
|
* @brief Multimap equality comparison.
|
|
* @param __x A %multimap.
|
|
* @param __y A %multimap of the same type as @a __x.
|
|
* @return True iff the size and elements of the maps are equal.
|
|
*
|
|
* This is an equivalence relation. It is linear in the size of the
|
|
* multimaps. Multimaps are considered equivalent if their sizes are equal,
|
|
* and if corresponding elements compare equal.
|
|
*/
|
|
template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
|
|
inline bool
|
|
operator==(const multimap<_Key, _Tp, _Compare, _Alloc>& __x,
|
|
const multimap<_Key, _Tp, _Compare, _Alloc>& __y)
|
|
{ return __x._M_t == __y._M_t; }
|
|
|
|
/**
|
|
* @brief Multimap ordering relation.
|
|
* @param __x A %multimap.
|
|
* @param __y A %multimap of the same type as @a __x.
|
|
* @return True iff @a x is lexicographically less than @a y.
|
|
*
|
|
* This is a total ordering relation. It is linear in the size of the
|
|
* multimaps. The elements must be comparable with @c <.
|
|
*
|
|
* See std::lexicographical_compare() for how the determination is made.
|
|
*/
|
|
template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
|
|
inline bool
|
|
operator<(const multimap<_Key, _Tp, _Compare, _Alloc>& __x,
|
|
const multimap<_Key, _Tp, _Compare, _Alloc>& __y)
|
|
{ return __x._M_t < __y._M_t; }
|
|
|
|
/// Based on operator==
|
|
template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
|
|
inline bool
|
|
operator!=(const multimap<_Key, _Tp, _Compare, _Alloc>& __x,
|
|
const multimap<_Key, _Tp, _Compare, _Alloc>& __y)
|
|
{ return !(__x == __y); }
|
|
|
|
/// Based on operator<
|
|
template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
|
|
inline bool
|
|
operator>(const multimap<_Key, _Tp, _Compare, _Alloc>& __x,
|
|
const multimap<_Key, _Tp, _Compare, _Alloc>& __y)
|
|
{ return __y < __x; }
|
|
|
|
/// Based on operator<
|
|
template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
|
|
inline bool
|
|
operator<=(const multimap<_Key, _Tp, _Compare, _Alloc>& __x,
|
|
const multimap<_Key, _Tp, _Compare, _Alloc>& __y)
|
|
{ return !(__y < __x); }
|
|
|
|
/// Based on operator<
|
|
template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
|
|
inline bool
|
|
operator>=(const multimap<_Key, _Tp, _Compare, _Alloc>& __x,
|
|
const multimap<_Key, _Tp, _Compare, _Alloc>& __y)
|
|
{ return !(__x < __y); }
|
|
|
|
/// See std::multimap::swap().
|
|
template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
|
|
inline void
|
|
swap(multimap<_Key, _Tp, _Compare, _Alloc>& __x,
|
|
multimap<_Key, _Tp, _Compare, _Alloc>& __y)
|
|
{ __x.swap(__y); }
|
|
|
|
_GLIBCXX_END_NAMESPACE_CONTAINER
|
|
} // namespace std
|
|
|
|
#endif /* _STL_MULTIMAP_H */
|