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 * 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.

#ifndef MULTISET_H
#define MULTISET_H

#ifndef Allocator
#define Allocator allocator
#include <defalloc.h>

#include <tree.h>

template <class Key, class Compare>
class multiset {
// typedefs:

    typedef Key key_type;
    typedef Key value_type;
    typedef Compare key_compare;
    typedef Compare value_compare;
    typedef rb_tree<key_type, value_type, 
                    ident<value_type, key_type>, key_compare> rep_type;
    rep_type t;  // red-black tree representing multiset
    typedef rep_type::const_reference reference;
    typedef rep_type::const_reference const_reference;
    typedef rep_type::const_iterator iterator;
    typedef rep_type::const_iterator const_iterator;
    typedef rep_type::const_reverse_iterator reverse_iterator;
    typedef rep_type::const_reverse_iterator const_reverse_iterator;
    typedef rep_type::size_type size_type;
    typedef rep_type::difference_type difference_type;

// allocation/deallocation

    multiset(const Compare& comp = Compare()) : t(comp, true) {}
    multiset(const value_type* first, const value_type* last, 
        const Compare& comp = Compare()) : t(comp, true) {
        for (const value_type* i = first; i != last; ++i)
    multiset(const multiset<Key, Compare>& x) : t(x.t, true) {}
    multiset<Key, Compare>& operator=(const multiset<Key, Compare>& x) { 
        t = x.t; 
        return *this;

// accessors:

    key_compare key_comp() const { return t.key_comp(); }
    value_compare value_comp() const { return t.key_comp(); }
    iterator begin() const { return t.begin(); }
    iterator end() const { return t.end(); }
    reverse_iterator rbegin() const { return t.rbegin(); } 
    reverse_iterator rend() const { return t.rend(); }
    bool empty() const { return t.empty(); }
    size_type size() const { return t.size(); }
    size_type max_size() const { return t.max_size(); }
    void swap(multiset<Key, Compare>& x) { t.swap(x.t); }

// insert/erase
    iterator insert(const value_type& x) { 
        return t.insert(x).first;
    iterator insert(iterator position, const value_type& x) {
        return t.insert((rep_type::iterator&)position, x);
    void insert(const value_type* first, const value_type* last) {
        for (const value_type* i = first; i != last; ++i)
    void erase(iterator position) { 
    size_type erase(const key_type& x) { 
        return t.erase(x); 
    void erase(iterator first, iterator last) { 

// multiset operations:

    iterator find(const key_type& x) const { return t.find(x); }
    size_type count(const key_type& x) const { return t.count(x); }
    iterator lower_bound(const key_type& x) const {
        return t.lower_bound(x);
    iterator upper_bound(const key_type& x) const {
        return t.upper_bound(x); 
    typedef  pair<iterator, iterator> pair_iterator_iterator; 
    // typedef done to get around compiler bug
    pair_iterator_iterator equal_range(const key_type& x) const {
        return t.equal_range(x);

template <class Key, class Compare>
inline bool operator==(const multiset<Key, Compare>& x, 
                       const multiset<Key, Compare>& y) {
    return x.size() == y.size() && equal(x.begin(), x.end(), y.begin());

template <class Key, class Compare>
inline bool operator<(const multiset<Key, Compare>& x, 
                      const multiset<Key, Compare>& y) {
    return lexicographical_compare(x.begin(), x.end(), y.begin(), y.end());

#undef Allocator


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