+// Multiset implementation -*- C++ -*-
+
+// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
+// 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 2, 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.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING. If not, write to the Free
+// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction. Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License. This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
/*
*
* Copyright (c) 1994
* purpose. It is provided "as is" without express or implied warranty.
*/
-/* NOTE: This is an internal header file, included by other STL headers.
- * You should not attempt to use it directly.
+/** @file stl_multiset.h
+ * This is an internal header file, included by other library headers.
+ * You should not attempt to use it directly.
*/
-#ifndef __SGI_STL_INTERNAL_MULTISET_H
-#define __SGI_STL_INTERNAL_MULTISET_H
+#ifndef _STL_MULTISET_H
+#define _STL_MULTISET_H 1
#include <bits/concept_check.h>
+#include <initializer_list>
+
+_GLIBCXX_BEGIN_NESTED_NAMESPACE(std, _GLIBCXX_STD_D)
+
+ /**
+ * @brief A standard container made up of elements, which can be retrieved
+ * in logarithmic time.
+ *
+ * @ingroup containers
+ * @ingroup associative_containers
+ *
+ * Meets the requirements of a <a href="tables.html#65">container</a>, a
+ * <a href="tables.html#66">reversible container</a>, and an
+ * <a href="tables.html#69">associative container</a> (using equivalent
+ * keys). For a @c multiset<Key> the key_type and value_type are Key.
+ *
+ * Multisets support bidirectional iterators.
+ *
+ * The private tree data is declared exactly the same way for set and
+ * multiset; the distinction is made entirely in how the tree functions are
+ * called (*_unique versus *_equal, same as the standard).
+ */
+ template <typename _Key, typename _Compare = std::less<_Key>,
+ typename _Alloc = std::allocator<_Key> >
+ class multiset
+ {
+ // concept requirements
+ typedef typename _Alloc::value_type _Alloc_value_type;
+ __glibcxx_class_requires(_Key, _SGIAssignableConcept)
+ __glibcxx_class_requires4(_Compare, bool, _Key, _Key,
+ _BinaryFunctionConcept)
+ __glibcxx_class_requires2(_Key, _Alloc_value_type, _SameTypeConcept)
+
+ public:
+ // typedefs:
+ typedef _Key key_type;
+ typedef _Key value_type;
+ typedef _Compare key_compare;
+ typedef _Compare value_compare;
+ typedef _Alloc allocator_type;
+
+ private:
+ /// This turns a red-black tree into a [multi]set.
+ typedef typename _Alloc::template rebind<_Key>::other _Key_alloc_type;
+
+ typedef _Rb_tree<key_type, value_type, _Identity<value_type>,
+ key_compare, _Key_alloc_type> _Rep_type;
+ /// The actual tree structure.
+ _Rep_type _M_t;
+
+ public:
+ typedef typename _Key_alloc_type::pointer pointer;
+ typedef typename _Key_alloc_type::const_pointer const_pointer;
+ typedef typename _Key_alloc_type::reference reference;
+ typedef typename _Key_alloc_type::const_reference const_reference;
+ // _GLIBCXX_RESOLVE_LIB_DEFECTS
+ // DR 103. set::iterator is required to be modifiable,
+ // but this allows modification of keys.
+ typedef typename _Rep_type::const_iterator iterator;
+ typedef typename _Rep_type::const_iterator const_iterator;
+ typedef typename _Rep_type::const_reverse_iterator reverse_iterator;
+ typedef typename _Rep_type::const_reverse_iterator const_reverse_iterator;
+ typedef typename _Rep_type::size_type size_type;
+ typedef typename _Rep_type::difference_type difference_type;
+
+ // allocation/deallocation
+ /**
+ * @brief Default constructor creates no elements.
+ */
+ multiset()
+ : _M_t() { }
+
+ /**
+ * @brief Creates a %multiset with no elements.
+ * @param comp Comparator to use.
+ * @param a An allocator object.
+ */
+ explicit
+ multiset(const _Compare& __comp,
+ const allocator_type& __a = allocator_type())
+ : _M_t(__comp, __a) { }
+
+ /**
+ * @brief Builds a %multiset from a range.
+ * @param first An input iterator.
+ * @param last An input iterator.
+ *
+ * Create a %multiset consisting of copies of the elements from
+ * [first,last). This is linear in N if the range is already sorted,
+ * and NlogN otherwise (where N is distance(first,last)).
+ */
+ template<typename _InputIterator>
+ multiset(_InputIterator __first, _InputIterator __last)
+ : _M_t()
+ { _M_t._M_insert_equal(__first, __last); }
+
+ /**
+ * @brief Builds a %multiset from a range.
+ * @param first An input iterator.
+ * @param last An input iterator.
+ * @param comp A comparison functor.
+ * @param a An allocator object.
+ *
+ * Create a %multiset consisting of copies of the elements from
+ * [first,last). This is linear in N if the range is already sorted,
+ * and NlogN otherwise (where N is distance(first,last)).
+ */
+ template<typename _InputIterator>
+ multiset(_InputIterator __first, _InputIterator __last,
+ const _Compare& __comp,
+ const allocator_type& __a = allocator_type())
+ : _M_t(__comp, __a)
+ { _M_t._M_insert_equal(__first, __last); }
+
+ /**
+ * @brief %Multiset copy constructor.
+ * @param x A %multiset of identical element and allocator types.
+ *
+ * The newly-created %multiset uses a copy of the allocation object used
+ * by @a x.
+ */
+ multiset(const multiset& __x)
+ : _M_t(__x._M_t) { }
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ /**
+ * @brief %Multiset move constructor.
+ * @param x A %multiset of identical element and allocator types.
+ *
+ * The newly-created %multiset contains the exact contents of @a x.
+ * The contents of @a x are a valid, but unspecified %multiset.
+ */
+ multiset(multiset&& __x)
+ : _M_t(std::forward<_Rep_type>(__x._M_t)) { }
+
+ /**
+ * @brief Builds a %multiset from an initializer_list.
+ * @param l An initializer_list.
+ * @param comp A comparison functor.
+ * @param a An allocator object.
+ *
+ * Create a %multiset consisting of copies of the elements from
+ * the list. This is linear in N if the list is already sorted,
+ * and NlogN otherwise (where N is @a l.size()).
+ */
+ multiset(initializer_list<value_type> __l,
+ const _Compare& __comp = _Compare(),
+ const allocator_type& __a = allocator_type())
+ : _M_t(__comp, __a)
+ { _M_t._M_insert_equal(__l.begin(), __l.end()); }
+#endif
+
+ /**
+ * @brief %Multiset assignment operator.
+ * @param x A %multiset of identical element and allocator types.
+ *
+ * All the elements of @a x are copied, but unlike the copy constructor,
+ * the allocator object is not copied.
+ */
+ multiset&
+ operator=(const multiset& __x)
+ {
+ _M_t = __x._M_t;
+ return *this;
+ }
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ /**
+ * @brief %Multiset move assignment operator.
+ * @param x A %multiset of identical element and allocator types.
+ *
+ * The contents of @a x are moved into this %multiset (without copying).
+ * @a x is a valid, but unspecified %multiset.
+ */
+ multiset&
+ operator=(multiset&& __x)
+ {
+ // NB: DR 675.
+ this->clear();
+ this->swap(__x);
+ return *this;
+ }
+
+ /**
+ * @brief %Multiset list assignment operator.
+ * @param l An initializer_list.
+ *
+ * This function fills a %multiset with copies of the elements in the
+ * initializer list @a l.
+ *
+ * Note that the assignment completely changes the %multiset and
+ * that the resulting %multiset's size is the same as the number
+ * of elements assigned. Old data may be lost.
+ */
+ multiset&
+ operator=(initializer_list<value_type> __l)
+ {
+ this->clear();
+ this->insert(__l.begin(), __l.end());
+ return *this;
+ }
+#endif
+
+ // accessors:
+
+ /// Returns the comparison object.
+ key_compare
+ key_comp() const
+ { return _M_t.key_comp(); }
+ /// Returns the comparison object.
+ value_compare
+ value_comp() const
+ { return _M_t.key_comp(); }
+ /// Returns the memory allocation object.
+ allocator_type
+ get_allocator() const
+ { return _M_t.get_allocator(); }
+
+ /**
+ * Returns a read-only (constant) iterator that points to the first
+ * element in the %multiset. Iteration is done in ascending order
+ * according to the keys.
+ */
+ iterator
+ begin() const
+ { return _M_t.begin(); }
+
+ /**
+ * Returns a read-only (constant) iterator that points one past the last
+ * element in the %multiset. Iteration is done in ascending order
+ * according to the keys.
+ */
+ iterator
+ end() const
+ { return _M_t.end(); }
+
+ /**
+ * Returns a read-only (constant) reverse iterator that points to the
+ * last element in the %multiset. Iteration is done in descending order
+ * according to the keys.
+ */
+ reverse_iterator
+ rbegin() const
+ { return _M_t.rbegin(); }
+
+ /**
+ * Returns a read-only (constant) reverse iterator that points to the
+ * last element in the %multiset. Iteration is done in descending order
+ * according to the keys.
+ */
+ reverse_iterator
+ rend() const
+ { return _M_t.rend(); }
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ /**
+ * Returns a read-only (constant) iterator that points to the first
+ * element in the %multiset. Iteration is done in ascending order
+ * according to the keys.
+ */
+ iterator
+ cbegin() const
+ { return _M_t.begin(); }
+
+ /**
+ * Returns a read-only (constant) iterator that points one past the last
+ * element in the %multiset. Iteration is done in ascending order
+ * according to the keys.
+ */
+ iterator
+ cend() const
+ { return _M_t.end(); }
+
+ /**
+ * Returns a read-only (constant) reverse iterator that points to the
+ * last element in the %multiset. Iteration is done in descending order
+ * according to the keys.
+ */
+ reverse_iterator
+ crbegin() const
+ { return _M_t.rbegin(); }
+
+ /**
+ * Returns a read-only (constant) reverse iterator that points to the
+ * last element in the %multiset. Iteration is done in descending order
+ * according to the keys.
+ */
+ reverse_iterator
+ crend() const
+ { return _M_t.rend(); }
+#endif
-namespace std
-{
-
-// Forward declaration of operators < and ==, needed for friend declaration.
-
-template <class _Key, class _Compare = less<_Key>,
- class _Alloc = allocator<_Key> >
-class multiset;
-
-template <class _Key, class _Compare, class _Alloc>
-inline bool operator==(const multiset<_Key,_Compare,_Alloc>& __x,
- const multiset<_Key,_Compare,_Alloc>& __y);
-
-template <class _Key, class _Compare, class _Alloc>
-inline bool operator<(const multiset<_Key,_Compare,_Alloc>& __x,
- const multiset<_Key,_Compare,_Alloc>& __y);
-
-template <class _Key, class _Compare, class _Alloc>
-class multiset
-{
- // concept requirements
- __glibcpp_class_requires(_Key, _SGIAssignableConcept);
- __glibcpp_class_requires4(_Compare, bool, _Key, _Key, _BinaryFunctionConcept);
-
-public:
-
- // typedefs:
-
- typedef _Key key_type;
- typedef _Key value_type;
- typedef _Compare key_compare;
- typedef _Compare value_compare;
-private:
- typedef _Rb_tree<key_type, value_type,
- _Identity<value_type>, key_compare, _Alloc> _Rep_type;
- _Rep_type _M_t; // red-black tree representing multiset
-public:
- typedef typename _Rep_type::const_pointer pointer;
- typedef typename _Rep_type::const_pointer const_pointer;
- typedef typename _Rep_type::const_reference reference;
- typedef typename _Rep_type::const_reference const_reference;
- typedef typename _Rep_type::const_iterator iterator;
- typedef typename _Rep_type::const_iterator const_iterator;
- typedef typename _Rep_type::const_reverse_iterator reverse_iterator;
- typedef typename _Rep_type::const_reverse_iterator const_reverse_iterator;
- typedef typename _Rep_type::size_type size_type;
- typedef typename _Rep_type::difference_type difference_type;
- typedef typename _Rep_type::allocator_type allocator_type;
-
- // allocation/deallocation
-
- multiset() : _M_t(_Compare(), allocator_type()) {}
- explicit multiset(const _Compare& __comp,
- const allocator_type& __a = allocator_type())
- : _M_t(__comp, __a) {}
-
- template <class _InputIterator>
- multiset(_InputIterator __first, _InputIterator __last)
- : _M_t(_Compare(), allocator_type())
- { _M_t.insert_equal(__first, __last); }
-
- template <class _InputIterator>
- multiset(_InputIterator __first, _InputIterator __last,
- const _Compare& __comp,
- const allocator_type& __a = allocator_type())
- : _M_t(__comp, __a) { _M_t.insert_equal(__first, __last); }
-
- multiset(const multiset<_Key,_Compare,_Alloc>& __x) : _M_t(__x._M_t) {}
-
- multiset<_Key,_Compare,_Alloc>&
- operator=(const multiset<_Key,_Compare,_Alloc>& __x) {
- _M_t = __x._M_t;
- return *this;
- }
-
- // accessors:
-
- key_compare key_comp() const { return _M_t.key_comp(); }
- value_compare value_comp() const { return _M_t.key_comp(); }
- allocator_type get_allocator() const { return _M_t.get_allocator(); }
-
- iterator begin() const { return _M_t.begin(); }
- iterator end() const { return _M_t.end(); }
- reverse_iterator rbegin() const { return _M_t.rbegin(); }
- reverse_iterator rend() const { return _M_t.rend(); }
- bool empty() const { return _M_t.empty(); }
- size_type size() const { return _M_t.size(); }
- size_type max_size() const { return _M_t.max_size(); }
- void swap(multiset<_Key,_Compare,_Alloc>& __x) { _M_t.swap(__x._M_t); }
-
- // insert/erase
- iterator insert(const value_type& __x) {
- return _M_t.insert_equal(__x);
- }
- iterator insert(iterator __position, const value_type& __x) {
- typedef typename _Rep_type::iterator _Rep_iterator;
- return _M_t.insert_equal((_Rep_iterator&)__position, __x);
- }
-
- template <class _InputIterator>
- void insert(_InputIterator __first, _InputIterator __last) {
- _M_t.insert_equal(__first, __last);
- }
- void erase(iterator __position) {
- typedef typename _Rep_type::iterator _Rep_iterator;
- _M_t.erase((_Rep_iterator&)__position);
- }
- size_type erase(const key_type& __x) {
- return _M_t.erase(__x);
- }
- void erase(iterator __first, iterator __last) {
- typedef typename _Rep_type::iterator _Rep_iterator;
- _M_t.erase((_Rep_iterator&)__first, (_Rep_iterator&)__last);
- }
- void clear() { _M_t.clear(); }
-
- // multiset operations:
-
- size_type count(const key_type& __x) const { return _M_t.count(__x); }
-
-#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
-//214. set::find() missing const overload
- iterator find(const key_type& __x) { return _M_t.find(__x); }
- const_iterator find(const key_type& __x) const { return _M_t.find(__x); }
- iterator lower_bound(const key_type& __x) {
- return _M_t.lower_bound(__x);
- }
- const_iterator lower_bound(const key_type& __x) const {
- return _M_t.lower_bound(__x);
- }
- iterator upper_bound(const key_type& __x) {
- return _M_t.upper_bound(__x);
- }
- const_iterator upper_bound(const key_type& __x) const {
- return _M_t.upper_bound(__x);
- }
- pair<iterator,iterator> equal_range(const key_type& __x) {
- return _M_t.equal_range(__x);
- }
- pair<const_iterator,const_iterator> equal_range(const key_type& __x) const {
- return _M_t.equal_range(__x);
- }
+ /// Returns true if the %set is empty.
+ bool
+ empty() const
+ { return _M_t.empty(); }
+
+ /// Returns the size of the %set.
+ size_type
+ size() const
+ { return _M_t.size(); }
+
+ /// Returns the maximum size of the %set.
+ size_type
+ max_size() const
+ { return _M_t.max_size(); }
+
+ /**
+ * @brief Swaps data with another %multiset.
+ * @param x A %multiset of the same element and allocator types.
+ *
+ * This exchanges the elements between two multisets 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(s1,s2) will feed to this function.
+ */
+ void
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ swap(multiset&& __x)
#else
- iterator find(const key_type& __x) const { return _M_t.find(__x); }
- iterator lower_bound(const key_type& __x) const {
- return _M_t.lower_bound(__x);
- }
- iterator upper_bound(const key_type& __x) const {
- return _M_t.upper_bound(__x);
- }
- pair<iterator,iterator> equal_range(const key_type& __x) const {
- return _M_t.equal_range(__x);
- }
+ swap(multiset& __x)
+#endif
+ { _M_t.swap(__x._M_t); }
+
+ // insert/erase
+ /**
+ * @brief Inserts an element into the %multiset.
+ * @param x Element to be inserted.
+ * @return An iterator that points to the inserted element.
+ *
+ * This function inserts an element into the %multiset. Contrary
+ * to a std::set the %multiset does not rely on unique keys and thus
+ * multiple copies of the same element can be inserted.
+ *
+ * Insertion requires logarithmic time.
+ */
+ iterator
+ insert(const value_type& __x)
+ { return _M_t._M_insert_equal(__x); }
+
+ /**
+ * @brief Inserts an element into the %multiset.
+ * @param position An iterator that serves as a hint as to where the
+ * element should be inserted.
+ * @param x Element to be inserted.
+ * @return An iterator that points to the inserted element.
+ *
+ * This function inserts an element into the %multiset. Contrary
+ * to a std::set the %multiset does not rely on unique keys and thus
+ * multiple copies of the same element 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.
+ *
+ * See http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt07ch17.html
+ * for more on "hinting".
+ *
+ * Insertion requires logarithmic time (if the hint is not taken).
+ */
+ iterator
+ insert(iterator __position, const value_type& __x)
+ { return _M_t._M_insert_equal_(__position, __x); }
+
+ /**
+ * @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); }
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ /**
+ * @brief Attempts to insert a list of elements into the %multiset.
+ * @param list A std::initializer_list<value_type> of elements
+ * 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
- template <class _K1, class _C1, class _A1>
- friend bool operator== (const multiset<_K1,_C1,_A1>&,
- const multiset<_K1,_C1,_A1>&);
- template <class _K1, class _C1, class _A1>
- friend bool operator< (const multiset<_K1,_C1,_A1>&,
- const multiset<_K1,_C1,_A1>&);
-};
-
-template <class _Key, class _Compare, class _Alloc>
-inline bool operator==(const multiset<_Key,_Compare,_Alloc>& __x,
- const multiset<_Key,_Compare,_Alloc>& __y) {
- return __x._M_t == __y._M_t;
-}
-
-template <class _Key, class _Compare, class _Alloc>
-inline bool operator<(const multiset<_Key,_Compare,_Alloc>& __x,
- const multiset<_Key,_Compare,_Alloc>& __y) {
- return __x._M_t < __y._M_t;
-}
-
-template <class _Key, class _Compare, class _Alloc>
-inline bool operator!=(const multiset<_Key,_Compare,_Alloc>& __x,
- const multiset<_Key,_Compare,_Alloc>& __y) {
- return !(__x == __y);
-}
-
-template <class _Key, class _Compare, class _Alloc>
-inline bool operator>(const multiset<_Key,_Compare,_Alloc>& __x,
- const multiset<_Key,_Compare,_Alloc>& __y) {
- return __y < __x;
-}
-
-template <class _Key, class _Compare, class _Alloc>
-inline bool operator<=(const multiset<_Key,_Compare,_Alloc>& __x,
- const multiset<_Key,_Compare,_Alloc>& __y) {
- return !(__y < __x);
-}
-
-template <class _Key, class _Compare, class _Alloc>
-inline bool operator>=(const multiset<_Key,_Compare,_Alloc>& __x,
- const multiset<_Key,_Compare,_Alloc>& __y) {
- return !(__x < __y);
-}
-
-template <class _Key, class _Compare, class _Alloc>
-inline void swap(multiset<_Key,_Compare,_Alloc>& __x,
- multiset<_Key,_Compare,_Alloc>& __y) {
- __x.swap(__y);
-}
-
-} // namespace std
-
-#endif /* __SGI_STL_INTERNAL_MULTISET_H */
-
-// Local Variables:
-// mode:C++
-// End:
+ /**
+ * @brief Erases an element from a %multiset.
+ * @param position An iterator pointing to the element to be erased.
+ *
+ * This function erases an element, pointed to by the given iterator,
+ * from a %multiset. 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); }
+
+ /**
+ * @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
+ * %multiset.
+ * 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); }
+
+ /**
+ * @brief Erases a [first,last) range of elements from a %multiset.
+ * @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 %multiset.
+ * 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); }
+
+ /**
+ * Erases all elements in a %multiset. 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()
+ { _M_t.clear(); }
+
+ // multiset operations:
+
+ /**
+ * @brief Finds the number of elements with given key.
+ * @param x Key of elements to be located.
+ * @return Number of elements with specified key.
+ */
+ size_type
+ count(const key_type& __x) const
+ { return _M_t.count(__x); }
+
+ // _GLIBCXX_RESOLVE_LIB_DEFECTS
+ // 214. set::find() missing const overload
+ //@{
+ /**
+ * @brief Tries to locate an element in a %set.
+ * @param x Element 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 element. If unsuccessful it returns the
+ * past-the-end ( @c end() ) iterator.
+ */
+ iterator
+ find(const key_type& __x)
+ { return _M_t.find(__x); }
+
+ const_iterator
+ find(const key_type& __x) const
+ { return _M_t.find(__x); }
+ //@}
+
+ //@{
+ /**
+ * @brief Finds the beginning of a subsequence matching given key.
+ * @param x Key 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); }
+
+ 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 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); }
+
+ 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 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).
+ *
+ * This function probably only makes sense for multisets.
+ */
+ std::pair<iterator, iterator>
+ equal_range(const key_type& __x)
+ { return _M_t.equal_range(__x); }
+
+ std::pair<const_iterator, const_iterator>
+ equal_range(const key_type& __x) const
+ { return _M_t.equal_range(__x); }
+
+ template<typename _K1, typename _C1, typename _A1>
+ friend bool
+ operator==(const multiset<_K1, _C1, _A1>&,
+ const multiset<_K1, _C1, _A1>&);
+
+ template<typename _K1, typename _C1, typename _A1>
+ friend bool
+ operator< (const multiset<_K1, _C1, _A1>&,
+ const multiset<_K1, _C1, _A1>&);
+ };
+
+ /**
+ * @brief Multiset equality comparison.
+ * @param x A %multiset.
+ * @param y A %multiset of the same type as @a x.
+ * @return True iff the size and elements of the multisets are equal.
+ *
+ * This is an equivalence relation. It is linear in the size of the
+ * multisets.
+ * Multisets are considered equivalent if their sizes are equal, and if
+ * corresponding elements compare equal.
+ */
+ template<typename _Key, typename _Compare, typename _Alloc>
+ inline bool
+ operator==(const multiset<_Key, _Compare, _Alloc>& __x,
+ const multiset<_Key, _Compare, _Alloc>& __y)
+ { return __x._M_t == __y._M_t; }
+
+ /**
+ * @brief Multiset ordering relation.
+ * @param x A %multiset.
+ * @param y A %multiset 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
+ * maps. The elements must be comparable with @c <.
+ *
+ * See std::lexicographical_compare() for how the determination is made.
+ */
+ template<typename _Key, typename _Compare, typename _Alloc>
+ inline bool
+ operator<(const multiset<_Key, _Compare, _Alloc>& __x,
+ const multiset<_Key, _Compare, _Alloc>& __y)
+ { return __x._M_t < __y._M_t; }
+
+ /// Returns !(x == y).
+ template<typename _Key, typename _Compare, typename _Alloc>
+ inline bool
+ operator!=(const multiset<_Key, _Compare, _Alloc>& __x,
+ const multiset<_Key, _Compare, _Alloc>& __y)
+ { return !(__x == __y); }
+
+ /// Returns y < x.
+ template<typename _Key, typename _Compare, typename _Alloc>
+ inline bool
+ operator>(const multiset<_Key,_Compare,_Alloc>& __x,
+ const multiset<_Key,_Compare,_Alloc>& __y)
+ { return __y < __x; }
+
+ /// Returns !(y < x)
+ template<typename _Key, typename _Compare, typename _Alloc>
+ inline bool
+ operator<=(const multiset<_Key, _Compare, _Alloc>& __x,
+ const multiset<_Key, _Compare, _Alloc>& __y)
+ { return !(__y < __x); }
+
+ /// Returns !(x < y)
+ template<typename _Key, typename _Compare, typename _Alloc>
+ inline bool
+ operator>=(const multiset<_Key, _Compare, _Alloc>& __x,
+ const multiset<_Key, _Compare, _Alloc>& __y)
+ { return !(__x < __y); }
+
+ /// See std::multiset::swap().
+ template<typename _Key, typename _Compare, typename _Alloc>
+ inline void
+ swap(multiset<_Key, _Compare, _Alloc>& __x,
+ multiset<_Key, _Compare, _Alloc>& __y)
+ { __x.swap(__y); }
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ template<typename _Key, typename _Compare, typename _Alloc>
+ inline void
+ swap(multiset<_Key, _Compare, _Alloc>&& __x,
+ multiset<_Key, _Compare, _Alloc>& __y)
+ { __x.swap(__y); }
+
+ template<typename _Key, typename _Compare, typename _Alloc>
+ inline void
+ swap(multiset<_Key, _Compare, _Alloc>& __x,
+ multiset<_Key, _Compare, _Alloc>&& __y)
+ { __x.swap(__y); }
+#endif
+
+_GLIBCXX_END_NESTED_NAMESPACE
+
+#endif /* _STL_MULTISET_H */
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