code:
/* Copyright 2003-2015 Joaquin M Lopez Munoz.
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE_1_0.txt or copy at
 * http://www.boost.org/LICENSE_1_0.txt)
 *
 * See http://www.boost.org/libs/multi_index for library home page.
 */

#ifndef BOOST_MULTI_INDEX_SEQUENCED_INDEX_HPP
#define BOOST_MULTI_INDEX_SEQUENCED_INDEX_HPP

#if defined(_MSC_VER)
#pragma once
#endif

#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
#include <boost/bind.hpp>
#include <boost/call_traits.hpp>
#include <boost/detail/allocator_utilities.hpp>
#include <boost/detail/no_exceptions_support.hpp>
#include <boost/detail/workaround.hpp>
#include <boost/foreach_fwd.hpp>
#include <boost/iterator/reverse_iterator.hpp>
#include <boost/move/core.hpp>
#include <boost/move/utility.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/mpl/not.hpp>
#include <boost/mpl/push_front.hpp>
#include <boost/multi_index/detail/access_specifier.hpp>
#include <boost/multi_index/detail/bidir_node_iterator.hpp>
#include <boost/multi_index/detail/do_not_copy_elements_tag.hpp>
#include <boost/multi_index/detail/index_node_base.hpp>
#include <boost/multi_index/detail/safe_mode.hpp>
#include <boost/multi_index/detail/scope_guard.hpp>
#include <boost/multi_index/detail/seq_index_node.hpp>
#include <boost/multi_index/detail/seq_index_ops.hpp>
#include <boost/multi_index/detail/vartempl_support.hpp>
#include <boost/multi_index/sequenced_index_fwd.hpp>
#include <boost/tuple/tuple.hpp>
#include <boost/type_traits/is_integral.hpp>
#include <cstddef>
#include <functional>
#include <utility>

#if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST)
#include<initializer_list>
#endif

#if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION)
#include <boost/bind.hpp>
#endif

#if defined(BOOST_MULTI_INDEX_ENABLE_INVARIANT_CHECKING)
#define BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT_OF(x)                    \
  detail::scope_guard BOOST_JOIN(check_invariant_,__LINE__)=                 \
    detail::make_obj_guard(x,&sequenced_index::check_invariant_);            \
  BOOST_JOIN(check_invariant_,__LINE__).touch();
#define BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT                          \
  BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT_OF(*this)
#else
#define BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT_OF(x)
#define BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT
#endif

namespace boost{

namespace multi_index{

namespace detail{

/* sequenced_index adds a layer of sequenced indexing to a given Super */

template<typename SuperMeta,typename TagList>
class sequenced_index:
  BOOST_MULTI_INDEX_PROTECTED_IF_MEMBER_TEMPLATE_FRIENDS SuperMeta::type

#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
  ,public safe_mode::safe_container<
    sequenced_index<SuperMeta,TagList> >
#endif

{
#if defined(BOOST_MULTI_INDEX_ENABLE_INVARIANT_CHECKING)&&\
    BOOST_WORKAROUND(__MWERKS__,<=0x3003)
/* The "ISO C++ Template Parser" option in CW8.3 has a problem with the
 * lifetime of const references bound to temporaries --precisely what
 * scopeguards are.
 */

#pragma parse_mfunc_templ off
#endif

  typedef typename SuperMeta::type                    super;

protected:
  typedef sequenced_index_node<
    typename super::node_type>                        node_type;

private:
  typedef typename node_type::impl_type               node_impl_type;

public:
  /* types */

  typedef typename node_type::value_type              value_type;
  typedef tuples::null_type                           ctor_args;
  typedef typename super::final_allocator_type        allocator_type;
  typedef typename allocator_type::reference          reference;
  typedef typename allocator_type::const_reference    const_reference;

#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
  typedef safe_mode::safe_iterator<
    bidir_node_iterator<node_type>,
    sequenced_index>                                  iterator;
#else
  typedef bidir_node_iterator<node_type>              iterator;
#endif

  typedef iterator                                    const_iterator;

  typedef std::size_t                                 size_type;
  typedef std::ptrdiff_t                              difference_type;
  typedef typename allocator_type::pointer            pointer;
  typedef typename allocator_type::const_pointer      const_pointer;
  typedef typename
    boost::reverse_iterator<iterator>                 reverse_iterator;
  typedef typename
    boost::reverse_iterator<const_iterator>           const_reverse_iterator;
  typedef TagList                                     tag_list;

protected:
  typedef typename super::final_node_type     final_node_type;
  typedef tuples::cons<
    ctor_args,
    typename super::ctor_args_list>           ctor_args_list;
  typedef typename mpl::push_front<
    typename super::index_type_list,
    sequenced_index>::type                    index_type_list;
  typedef typename mpl::push_front<
    typename super::iterator_type_list,
    iterator>::type                           iterator_type_list;
  typedef typename mpl::push_front<
    typename super::const_iterator_type_list,
    const_iterator>::type                     const_iterator_type_list;
  typedef typename super::copy_map_type       copy_map_type;

#if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION)
  typedef typename super::index_saver_type    index_saver_type;
  typedef typename super::index_loader_type   index_loader_type;
#endif

private:
#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
  typedef safe_mode::safe_container<
    sequenced_index>                          safe_super;
#endif

  typedef typename call_traits<value_type>::param_type value_param_type;

  /* Needed to avoid commas in BOOST_MULTI_INDEX_OVERLOADS_TO_VARTEMPL
   * expansion.
   */

  typedef std::pair<iterator,bool>                     emplace_return_type;

public:

  /* construct/copy/destroy
   * Default and copy ctors are in the protected section as indices are
   * not supposed to be created on their own. No range ctor either.
   */

  sequenced_index<SuperMeta,TagList>& operator=(
    const sequenced_index<SuperMeta,TagList>& x)
  {
    this->final()=x.final();
    return *this;
  }

#if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST)
  sequenced_index<SuperMeta,TagList>& operator=(
    std::initializer_list<value_type> list)
  {
    this->final()=list;
    return *this;
  }
#endif

  template <class InputIterator>
  void assign(InputIterator first,InputIterator last)
  {
    assign_iter(first,last,mpl::not_<is_integral<InputIterator> >());
  }

#if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST)
  void assign(std::initializer_list<value_type> list)
  {
    assign(list.begin(),list.end());
  }
#endif

  void assign(size_type n,value_param_type value)
  {
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    clear();
    for(size_type i=0;i<n;++i)push_back(value);
  }

  allocator_type get_allocator()const BOOST_NOEXCEPT
  {
    return this->final().get_allocator();
  }

  /* iterators */

  iterator  begin()BOOST_NOEXCEPT
    {return make_iterator(node_type::from_impl(header()->next()));}
  const_iterator begin()const BOOST_NOEXCEPT
    {return make_iterator(node_type::from_impl(header()->next()));}
  iterator
    end()BOOST_NOEXCEPT{return make_iterator(header());}
  const_iterator
    end()const BOOST_NOEXCEPT{return make_iterator(header());}
  reverse_iterator
    rbegin()BOOST_NOEXCEPT{return boost::make_reverse_iterator(end());}
  const_reverse_iterator
    rbegin()const BOOST_NOEXCEPT{return boost::make_reverse_iterator(end());}
  reverse_iterator
    rend()BOOST_NOEXCEPT{return boost::make_reverse_iterator(begin());}
  const_reverse_iterator
    rend()const BOOST_NOEXCEPT{return boost::make_reverse_iterator(begin());}
  const_iterator
    cbegin()const BOOST_NOEXCEPT{return begin();}
  const_iterator
    cend()const BOOST_NOEXCEPT{return end();}
  const_reverse_iterator
    crbegin()const BOOST_NOEXCEPT{return rbegin();}
  const_reverse_iterator
    crend()const BOOST_NOEXCEPT{return rend();}

  iterator iterator_to(const value_type& x)
  {
    return make_iterator(node_from_value<node_type>(&x));
  }

  const_iterator iterator_to(const value_type& x)const
  {
    return make_iterator(node_from_value<node_type>(&x));
  }

  /* capacity */

  bool      empty()const BOOST_NOEXCEPT{return this->final_empty_();}
  size_type size()const BOOST_NOEXCEPT{return this->final_size_();}
  size_type max_size()const BOOST_NOEXCEPT{return this->final_max_size_();}

  void resize(size_type n)
  {
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    if(n>size()){
      for(size_type m=n-size();m--;)
        this->final_emplace_(BOOST_MULTI_INDEX_NULL_PARAM_PACK);
    }
    else if(n<size()){for(size_type m=size()-n;m--;)pop_back();}
  }

  void resize(size_type n,value_param_type x)
  {
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    if(n>size())insert(end(),n-size(),x);
    else if(n<size())for(size_type m=size()-n;m--;)pop_back();
  }

  /* access: no non-const versions provided as sequenced_index
   * handles const elements.
   */

  const_reference front()const{return *begin();}
  const_reference back()const{return *--end();}

  /* modifiers */

  BOOST_MULTI_INDEX_OVERLOADS_TO_VARTEMPL(
    emplace_return_type,emplace_front,emplace_front_impl)

  std::pair<iterator,bool> push_front(const value_type& x)
                             {return insert(begin(),x);}
  std::pair<iterator,bool> push_front(BOOST_RV_REF(value_type) x)
                             {return insert(begin(),boost::move(x));}
  void                     pop_front(){erase(begin());}

  BOOST_MULTI_INDEX_OVERLOADS_TO_VARTEMPL(
    emplace_return_type,emplace_back,emplace_back_impl)

  std::pair<iterator,bool> push_back(const value_type& x)
                             {return insert(end(),x);}
  std::pair<iterator,bool> push_back(BOOST_RV_REF(value_type) x)
                             {return insert(end(),boost::move(x));}
  void                     pop_back(){erase(--end());}

  BOOST_MULTI_INDEX_OVERLOADS_TO_VARTEMPL_EXTRA_ARG(
    emplace_return_type,emplace,emplace_impl,iterator,position)

  std::pair<iterator,bool> insert(iterator position,const value_type& x)
  {
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this);
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    std::pair<final_node_type*,bool> p=this->final_insert_(x);
    if(p.second&&position.get_node()!=header()){
      relink(position.get_node(),p.first);
    }
    return std::pair<iterator,bool>(make_iterator(p.first),p.second);
  }

  std::pair<iterator,bool> insert(iterator position,BOOST_RV_REF(value_type) x)
  {
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this);
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    std::pair<final_node_type*,bool> p=this->final_insert_rv_(x);
    if(p.second&&position.get_node()!=header()){
      relink(position.get_node(),p.first);
    }
    return std::pair<iterator,bool>(make_iterator(p.first),p.second);
  }

  void insert(iterator position,size_type n,value_param_type x)
  {
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this);
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    for(size_type i=0;i<n;++i)insert(position,x);
  }

  template<typename InputIterator>
  void insert(iterator position,InputIterator first,InputIterator last)
  {
    insert_iter(position,first,last,mpl::not_<is_integral<InputIterator> >());
  }

#if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST)
  void insert(iterator position,std::initializer_list<value_type> list)
  {
    insert(position,list.begin(),list.end());
  }
#endif

  iterator erase(iterator position)
  {
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_DEREFERENCEABLE_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this);
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    this->final_erase_(static_cast<final_node_type*>(position++.get_node()));
    return position;
  }

  iterator erase(iterator first,iterator last)
  {
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(first);
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(last);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(first,*this);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(last,*this);
    BOOST_MULTI_INDEX_CHECK_VALID_RANGE(first,last);
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    while(first!=last){
      first=erase(first);
    }
    return first;
  }

  bool replace(iterator position,const value_type& x)
  {
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_DEREFERENCEABLE_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this);
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    return this->final_replace_(
      x,static_cast<final_node_type*>(position.get_node()));
  }

  bool replace(iterator position,BOOST_RV_REF(value_type) x)
  {
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_DEREFERENCEABLE_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this);
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    return this->final_replace_rv_(
      x,static_cast<final_node_type*>(position.get_node()));
  }

  template<typename Modifier>
  bool modify(iterator position,Modifier mod)
  {
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_DEREFERENCEABLE_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this);
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;

#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
    /* MSVC++ 6.0 optimizer on safe mode code chokes if this
     * this is not added. Left it for all compilers as it does no
     * harm.
     */

    position.detach();
#endif

    return this->final_modify_(
      mod,static_cast<final_node_type*>(position.get_node()));
  }

  template<typename Modifier,typename Rollback>
  bool modify(iterator position,Modifier mod,Rollback back_)
  {
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_DEREFERENCEABLE_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this);
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;

#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
    /* MSVC++ 6.0 optimizer on safe mode code chokes if this
     * this is not added. Left it for all compilers as it does no
     * harm.
     */

    position.detach();
#endif

    return this->final_modify_(
      mod,back_,static_cast<final_node_type*>(position.get_node()));
  }

  void swap(sequenced_index<SuperMeta,TagList>& x)
  {
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT_OF(x);
    this->final_swap_(x.final());
  }

  void clear()BOOST_NOEXCEPT
  {
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    this->final_clear_();
  }

  /* list operations */

  void splice(iterator position,sequenced_index<SuperMeta,TagList>& x)
  {
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this);
    BOOST_MULTI_INDEX_CHECK_DIFFERENT_CONTAINER(*this,x);
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    iterator first=x.begin(),last=x.end();
    while(first!=last){
      if(insert(position,*first).second)first=x.erase(first);
      else ++first;
    }
  }

  void splice(iterator position,sequenced_index<SuperMeta,TagList>& x,iterator i)
  {
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this);
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(i);
    BOOST_MULTI_INDEX_CHECK_DEREFERENCEABLE_ITERATOR(i);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(i,x);
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    if(&x==this){
      if(position!=i)relink(position.get_node(),i.get_node());
    }
    else{
      if(insert(position,*i).second){

#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
    /* MSVC++ 6.0 optimizer has a hard time with safe mode, and the following
     * workaround is needed. Left it for all compilers as it does no
     * harm.
     */
        i.detach();
        x.erase(x.make_iterator(i.get_node()));
#else
        x.erase(i);
#endif

      }
    }
  }

  void splice(
    iterator position,sequenced_index<SuperMeta,TagList>& x,
    iterator first,iterator last)
  {
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this);
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(first);
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(last);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(first,x);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(last,x);
    BOOST_MULTI_INDEX_CHECK_VALID_RANGE(first,last);
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    if(&x==this){
      BOOST_MULTI_INDEX_CHECK_OUTSIDE_RANGE(position,first,last);
      if(position!=last)relink(
        position.get_node(),first.get_node(),last.get_node());
    }
    else{
      while(first!=last){
        if(insert(position,*first).second)first=x.erase(first);
        else ++first;
      }
    }
  }

  void remove(value_param_type value)
  {
    sequenced_index_remove(
      *this,
      ::boost::bind(std::equal_to<value_type>(),::boost::arg<1>(),value));
  }

  template<typename Predicate>
  void remove_if(Predicate pred)
  {
    sequenced_index_remove(*this,pred);
  }

  void unique()
  {
    sequenced_index_unique(*this,std::equal_to<value_type>());
  }

  template <class BinaryPredicate>
  void unique(BinaryPredicate binary_pred)
  {
    sequenced_index_unique(*this,binary_pred);
  }

  void merge(sequenced_index<SuperMeta,TagList>& x)
  {
    sequenced_index_merge(*this,x,std::less<value_type>());
  }

  template <typename Compare>
  void merge(sequenced_index<SuperMeta,TagList>& x,Compare comp)
  {
    sequenced_index_merge(*this,x,comp);
  }

  void sort()
  {
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    sequenced_index_sort(header(),std::less<value_type>());
  }

  template <typename Compare>
  void sort(Compare comp)
  {
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    sequenced_index_sort(header(),comp);
  }

  void reverse()BOOST_NOEXCEPT
  {
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    node_impl_type::reverse(header()->impl());
  }

  /* rearrange operations */

  void relocate(iterator position,iterator i)
  {
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this);
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(i);
    BOOST_MULTI_INDEX_CHECK_DEREFERENCEABLE_ITERATOR(i);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(i,*this);
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    if(position!=i)relink(position.get_node(),i.get_node());
  }

  void relocate(iterator position,iterator first,iterator last)
  {
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this);
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(first);
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(last);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(first,*this);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(last,*this);
    BOOST_MULTI_INDEX_CHECK_VALID_RANGE(first,last);
    BOOST_MULTI_INDEX_CHECK_OUTSIDE_RANGE(position,first,last);
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    if(position!=last)relink(
      position.get_node(),first.get_node(),last.get_node());
  }

  template<typename InputIterator>
  void rearrange(InputIterator first)
  {
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    node_type* pos=header();
    for(size_type s=size();s--;){
      const value_type& v=*first++;
      relink(pos,node_from_value<node_type>(&v));
    }
  }

BOOST_MULTI_INDEX_PROTECTED_IF_MEMBER_TEMPLATE_FRIENDS:
  sequenced_index(const ctor_args_list& args_list,const allocator_type& al):
    super(args_list.get_tail(),al)
  {
    empty_initialize();
  }

  sequenced_index(const sequenced_index<SuperMeta,TagList>& x):
    super(x)

#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
    ,safe_super()
#endif

  {
    /* the actual copying takes place in subsequent call to copy_() */
  }

  sequenced_index(
    const sequenced_index<SuperMeta,TagList>& x,do_not_copy_elements_tag):
    super(x,do_not_copy_elements_tag())

#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
    ,safe_super()
#endif

  {
    empty_initialize();
  }

  ~sequenced_index()
  {
    /* the container is guaranteed to be empty by now */
  }

#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
  iterator       make_iterator(node_type* node){return iterator(node,this);}
  const_iterator make_iterator(node_type* node)const
    {return const_iterator(node,const_cast<sequenced_index*>(this));}
#else
  iterator       make_iterator(node_type* node){return iterator(node);}
  const_iterator make_iterator(node_type* node)const
                   {return const_iterator(node);}
#endif

  void copy_(
    const sequenced_index<SuperMeta,TagList>& x,const copy_map_type& map)
  {
    node_type* org=x.header();
    node_type* cpy=header();
    do{
      node_type* next_org=node_type::from_impl(org->next());
      node_type* next_cpy=map.find(static_cast<final_node_type*>(next_org));
      cpy->next()=next_cpy->impl();
      next_cpy->prior()=cpy->impl();
      org=next_org;
      cpy=next_cpy;
    }while(org!=x.header());

    super::copy_(x,map);
  }

  template<typename Variant>
  final_node_type* insert_(
    value_param_type v,final_node_type*& x,Variant variant)
  {
    final_node_type* res=super::insert_(v,x,variant);
    if(res==x)link(static_cast<node_type*>(x));
    return res;
  }

  template<typename Variant>
  final_node_type* insert_(
    value_param_type v,node_type* position,final_node_type*& x,Variant variant)
  {
    final_node_type* res=super::insert_(v,position,x,variant);
    if(res==x)link(static_cast<node_type*>(x));
    return res;
  }

  void erase_(node_type* x)
  {
    unlink(x);
    super::erase_(x);

#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
    detach_iterators(x);
#endif
  }

  void delete_all_nodes_()
  {
    for(node_type* x=node_type::from_impl(header()->next());x!=header();){
      node_type* y=node_type::from_impl(x->next());
      this->final_delete_node_(static_cast<final_node_type*>(x));
      x=y;
    }
  }

  void clear_()
  {
    super::clear_();
    empty_initialize();

#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
    safe_super::detach_dereferenceable_iterators();
#endif
  }

  void swap_(sequenced_index<SuperMeta,TagList>& x)
  {
#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
    safe_super::swap(x);
#endif

    super::swap_(x);
  }

  void swap_elements_(sequenced_index<SuperMeta,TagList>& x)
  {
#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
    safe_super::swap(x);
#endif

    super::swap_elements_(x);
  }

  template<typename Variant>
  bool replace_(value_param_type v,node_type* x,Variant variant)
  {
    return super::replace_(v,x,variant);
  }

  bool modify_(node_type* x)
  {
    BOOST_TRY{
      if(!super::modify_(x)){
        unlink(x);

#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
        detach_iterators(x);
#endif

        return false;
      }
      else return true;
    }
    BOOST_CATCH(...){
      unlink(x);

#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
      detach_iterators(x);
#endif

      BOOST_RETHROW;
    }
    BOOST_CATCH_END
  }

  bool modify_rollback_(node_type* x)
  {
    return super::modify_rollback_(x);
  }

#if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION)
  /* serialization */

  template<typename Archive>
  void save_(
    Archive& ar,const unsigned int version,const index_saver_type& sm)const
  {
    sm.save(begin(),end(),ar,version);
    super::save_(ar,version,sm);
  }

  template<typename Archive>
  void load_(
    Archive& ar,const unsigned int version,const index_loader_type& lm)
  {
    lm.load(
      ::boost::bind(
        &sequenced_index::rearranger,this,::boost::arg<1>(),::boost::arg<2>()),
      ar,version);
    super::load_(ar,version,lm);
  }
#endif

#if defined(BOOST_MULTI_INDEX_ENABLE_INVARIANT_CHECKING)
  /* invariant stuff */

  bool invariant_()const
  {
    if(size()==0||begin()==end()){
      if(size()!=0||begin()!=end()||
         header()->next()!=header()->impl()||
         header()->prior()!=header()->impl())return false;
    }
    else{
      size_type s=0;
      for(const_iterator it=begin(),it_end=end();it!=it_end;++it,++s){
        if(it.get_node()->next()->prior()!=it.get_node()->impl())return false;
        if(it.get_node()->prior()->next()!=it.get_node()->impl())return false;
      }
      if(s!=size())return false;
    }

    return super::invariant_();
  }

  /* This forwarding function eases things for the boost::mem_fn construct
   * in BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT. Actually,
   * final_check_invariant is already an inherited member function of index.
   */
  void check_invariant_()const{this->final_check_invariant_();}
#endif

private:
  node_type* header()const{return this->final_header();}

  void empty_initialize()
  {
    header()->prior()=header()->next()=header()->impl();
  }

  void link(node_type* x)
  {
    node_impl_type::link(x->impl(),header()->impl());
  };

  static void unlink(node_type* x)
  {
    node_impl_type::unlink(x->impl());
  }

  static void relink(node_type* position,node_type* x)
  {
    node_impl_type::relink(position->impl(),x->impl());
  }

  static void relink(node_type* position,node_type* first,node_type* last)
  {
    node_impl_type::relink(
      position->impl(),first->impl(),last->impl());
  }

#if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION)
  void rearranger(node_type* position,node_type *x)
  {
    if(!position)position=header();
    node_type::increment(position);
    if(position!=x)relink(position,x);
  }
#endif

#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
  void detach_iterators(node_type* x)
  {
    iterator it=make_iterator(x);
    safe_mode::detach_equivalent_iterators(it);
  }
#endif

  template <class InputIterator>
  void assign_iter(InputIterator first,InputIterator last,mpl::true_)
  {
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    clear();
    for(;first!=last;++first)this->final_insert_ref_(*first);
  }

  void assign_iter(size_type n,value_param_type value,mpl::false_)
  {
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    clear();
    for(size_type i=0;i<n;++i)push_back(value);
  }

  template<typename InputIterator>
  void insert_iter(
    iterator position,InputIterator first,InputIterator last,mpl::true_)
  {
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    for(;first!=last;++first){
      std::pair<final_node_type*,bool> p=
        this->final_insert_ref_(*first);
      if(p.second&&position.get_node()!=header()){
        relink(position.get_node(),p.first);
      }
    }
  }

  void insert_iter(
    iterator position,size_type n,value_param_type x,mpl::false_)
  {
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this);
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    for(size_type i=0;i<n;++i)insert(position,x);
  }

  template<BOOST_MULTI_INDEX_TEMPLATE_PARAM_PACK>
  std::pair<iterator,bool> emplace_front_impl(
    BOOST_MULTI_INDEX_FUNCTION_PARAM_PACK)
  {
    return emplace_impl(begin(),BOOST_MULTI_INDEX_FORWARD_PARAM_PACK);
  }

  template<BOOST_MULTI_INDEX_TEMPLATE_PARAM_PACK>
  std::pair<iterator,bool> emplace_back_impl(
    BOOST_MULTI_INDEX_FUNCTION_PARAM_PACK)
  {
    return emplace_impl(end(),BOOST_MULTI_INDEX_FORWARD_PARAM_PACK);
  }

  template<BOOST_MULTI_INDEX_TEMPLATE_PARAM_PACK>
  std::pair<iterator,bool> emplace_impl(
    iterator position,BOOST_MULTI_INDEX_FUNCTION_PARAM_PACK)
  {
    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this);
    BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT;
    std::pair<final_node_type*,bool> p=
      this->final_emplace_(BOOST_MULTI_INDEX_FORWARD_PARAM_PACK);
    if(p.second&&position.get_node()!=header()){
      relink(position.get_node(),p.first);
    }
    return std::pair<iterator,bool>(make_iterator(p.first),p.second);
  }

#if defined(BOOST_MULTI_INDEX_ENABLE_INVARIANT_CHECKING)&&\
    BOOST_WORKAROUND(__MWERKS__,<=0x3003)
#pragma parse_mfunc_templ reset
#endif
};

/* comparison */

template<
  typename SuperMeta1,typename TagList1,
  typename SuperMeta2,typename TagList2
>
bool operator==(
  const sequenced_index<SuperMeta1,TagList1>& x,
  const sequenced_index<SuperMeta2,TagList2>& y)
{
  return x.size()==y.size()&&std::equal(x.begin(),x.end(),y.begin());
}

template<
  typename SuperMeta1,typename TagList1,
  typename SuperMeta2,typename TagList2
>
bool operator<(
  const sequenced_index<SuperMeta1,TagList1>& x,
  const sequenced_index<SuperMeta2,TagList2>& y)
{
  return std::lexicographical_compare(x.begin(),x.end(),y.begin(),y.end());
}

template<
  typename SuperMeta1,typename TagList1,
  typename SuperMeta2,typename TagList2
>
bool operator!=(
  const sequenced_index<SuperMeta1,TagList1>& x,
  const sequenced_index<SuperMeta2,TagList2>& y)
{
  return !(x==y);
}

template<
  typename SuperMeta1,typename TagList1,
  typename SuperMeta2,typename TagList2
>
bool operator>(
  const sequenced_index<SuperMeta1,TagList1>& x,
  const sequenced_index<SuperMeta2,TagList2>& y)
{
  return y<x;
}

template<
  typename SuperMeta1,typename TagList1,
  typename SuperMeta2,typename TagList2
>
bool operator>=(
  const sequenced_index<SuperMeta1,TagList1>& x,
  const sequenced_index<SuperMeta2,TagList2>& y)
{
  return !(x<y);
}

template<
  typename SuperMeta1,typename TagList1,
  typename SuperMeta2,typename TagList2
>
bool operator<=(
  const sequenced_index<SuperMeta1,TagList1>& x,
  const sequenced_index<SuperMeta2,TagList2>& y)
{
  return !(x>y);
}

/*  specialized algorithms */

template<typename SuperMeta,typename TagList>
void swap(
  sequenced_index<SuperMeta,TagList>& x,
  sequenced_index<SuperMeta,TagList>& y)
{
  x.swap(y);
}

} /* namespace multi_index::detail */

/* sequenced index specifier */

template <typename TagList>
struct sequenced
{
  BOOST_STATIC_ASSERT(detail::is_tag<TagList>::value);

  template<typename Super>
  struct node_class
  {
    typedef detail::sequenced_index_node<Super> type;
  };

  template<typename SuperMeta>
  struct index_class
  {
    typedef detail::sequenced_index<SuperMeta,typename TagList::type> type;
  };
};

} /* namespace multi_index */

} /* namespace boost */

/* Boost.Foreach compatibility */

template<typename SuperMeta,typename TagList>
inline boost::mpl::true_* boost_foreach_is_noncopyable(
  boost::multi_index::detail::sequenced_index<SuperMeta,TagList>*&,
  boost_foreach_argument_dependent_lookup_hack)
{
  return 0;
}

#undef BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT
#undef BOOST_MULTI_INDEX_SEQ_INDEX_CHECK_INVARIANT_OF

#endif


code:
/* Copyright 2003-2013 Joaquin M Lopez Munoz.
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE_1_0.txt or copy at
 * http://www.boost.org/LICENSE_1_0.txt)
 *
 * See http://www.boost.org/libs/multi_index for library home page.
 */

#ifndef BOOST_MULTI_INDEX_SEQUENCED_INDEX_FWD_HPP
#define BOOST_MULTI_INDEX_SEQUENCED_INDEX_FWD_HPP

#if defined(_MSC_VER)
#pragma once
#endif

#include <boost/multi_index/tag.hpp>

namespace boost{

namespace multi_index{

namespace detail{

template<typename SuperMeta,typename TagList>
class sequenced_index;

template<
  typename SuperMeta1,typename TagList1,
  typename SuperMeta2,typename TagList2
>
bool operator==(
  const sequenced_index<SuperMeta1,TagList1>& x,
  const sequenced_index<SuperMeta2,TagList2>& y);

template<
  typename SuperMeta1,typename TagList1,
  typename SuperMeta2,typename TagList2
>
bool operator<(
  const sequenced_index<SuperMeta1,TagList1>& x,
  const sequenced_index<SuperMeta2,TagList2>& y);

template<
  typename SuperMeta1,typename TagList1,
  typename SuperMeta2,typename TagList2
>
bool operator!=(
  const sequenced_index<SuperMeta1,TagList1>& x,
  const sequenced_index<SuperMeta2,TagList2>& y);

template<
  typename SuperMeta1,typename TagList1,
  typename SuperMeta2,typename TagList2
>
bool operator>(
  const sequenced_index<SuperMeta1,TagList1>& x,
  const sequenced_index<SuperMeta2,TagList2>& y);

template<
  typename SuperMeta1,typename TagList1,
  typename SuperMeta2,typename TagList2
>
bool operator>=(
  const sequenced_index<SuperMeta1,TagList1>& x,
  const sequenced_index<SuperMeta2,TagList2>& y);

template<
  typename SuperMeta1,typename TagList1,
  typename SuperMeta2,typename TagList2
>
bool operator<=(
  const sequenced_index<SuperMeta1,TagList1>& x,
  const sequenced_index<SuperMeta2,TagList2>& y);

template<typename SuperMeta,typename TagList>
void swap(
  sequenced_index<SuperMeta,TagList>& x,
  sequenced_index<SuperMeta,TagList>& y);

} /* namespace multi_index::detail */

/* index specifiers */

template <typename TagList=tag<> >
struct sequenced;

} /* namespace multi_index */

} /* namespace boost */

#endif

license: mit


code:
/* Copyright 2003-2013 Joaquin M Lopez Munoz.
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE_1_0.txt or copy at
 * http://www.boost.org/LICENSE_1_0.txt)
 *
 * See http://www.boost.org/libs/multi_index for library home page.
 */

#ifndef BOOST_MULTI_INDEX_TAG_HPP
#define BOOST_MULTI_INDEX_TAG_HPP

#if defined(_MSC_VER)
#pragma once
#endif

#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
#include <boost/multi_index/detail/no_duplicate_tags.hpp>
#include <boost/mpl/identity.hpp>
#include <boost/mpl/transform.hpp>
#include <boost/mpl/vector.hpp>
#include <boost/preprocessor/facilities/intercept.hpp>
#include <boost/preprocessor/repetition/enum_binary_params.hpp>
#include <boost/preprocessor/repetition/enum_params.hpp>
#include <boost/static_assert.hpp>
#include <boost/type_traits/is_base_and_derived.hpp>

/* A wrapper of mpl::vector used to hide MPL from the user.
 * tag contains types used as tag names for indices in get() functions.
 */

/* This user_definable macro limits the number of elements of a tag;
 * useful for shortening resulting symbol names (MSVC++ 6.0, for instance,
 * has problems coping with very long symbol names.)
 */

#if !defined(BOOST_MULTI_INDEX_LIMIT_TAG_SIZE)
#define BOOST_MULTI_INDEX_LIMIT_TAG_SIZE BOOST_MPL_LIMIT_VECTOR_SIZE
#endif

#if BOOST_MULTI_INDEX_LIMIT_TAG_SIZE<BOOST_MPL_LIMIT_VECTOR_SIZE
#define BOOST_MULTI_INDEX_TAG_SIZE BOOST_MULTI_INDEX_LIMIT_TAG_SIZE
#else
#define BOOST_MULTI_INDEX_TAG_SIZE BOOST_MPL_LIMIT_VECTOR_SIZE
#endif

namespace boost{

namespace multi_index{

namespace detail{

struct tag_marker{};

template<typename T>
struct is_tag
{
  BOOST_STATIC_CONSTANT(bool,value=(is_base_and_derived<tag_marker,T>::value));
};

} /* namespace multi_index::detail */

template<
  BOOST_PP_ENUM_BINARY_PARAMS(
    BOOST_MULTI_INDEX_TAG_SIZE,
    typename T,
    =mpl::na BOOST_PP_INTERCEPT)
>
struct tag:private detail::tag_marker
{
  /* The mpl::transform pass produces shorter symbols (without
   * trailing mpl::na's.)
   */

  typedef typename mpl::transform<
    mpl::vector<BOOST_PP_ENUM_PARAMS(BOOST_MULTI_INDEX_TAG_SIZE,T)>,
    mpl::identity<mpl::_1>
  >::type type;

  BOOST_STATIC_ASSERT(detail::no_duplicate_tags<type>::value);
};

} /* namespace multi_index */

} /* namespace boost */

#undef BOOST_MULTI_INDEX_TAG_SIZE

#endif


code:
/* Multiply indexed container.
 *
 * Copyright 2003-2014 Joaquin M Lopez Munoz.
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE_1_0.txt or copy at
 * http://www.boost.org/LICENSE_1_0.txt)
 *
 * See http://www.boost.org/libs/multi_index for library home page.
 */

#ifndef BOOST_MULTI_INDEX_HPP
#define BOOST_MULTI_INDEX_HPP

#if defined(_MSC_VER)
#pragma once
#endif

#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
#include <algorithm>
#include <boost/detail/allocator_utilities.hpp>
#include <boost/detail/no_exceptions_support.hpp>
#include <boost/detail/workaround.hpp>
#include <boost/move/core.hpp>
#include <boost/mpl/at.hpp>
#include <boost/mpl/contains.hpp>
#include <boost/mpl/find_if.hpp>
#include <boost/mpl/identity.hpp>
#include <boost/mpl/int.hpp>
#include <boost/mpl/size.hpp>
#include <boost/mpl/deref.hpp>
#include <boost/multi_index_container_fwd.hpp>
#include <boost/multi_index/detail/access_specifier.hpp>
#include <boost/multi_index/detail/adl_swap.hpp>
#include <boost/multi_index/detail/base_type.hpp>
#include <boost/multi_index/detail/do_not_copy_elements_tag.hpp>
#include <boost/multi_index/detail/converter.hpp>
#include <boost/multi_index/detail/header_holder.hpp>
#include <boost/multi_index/detail/has_tag.hpp>
#include <boost/multi_index/detail/no_duplicate_tags.hpp>
#include <boost/multi_index/detail/safe_mode.hpp>
#include <boost/multi_index/detail/scope_guard.hpp>
#include <boost/multi_index/detail/vartempl_support.hpp>
#include <boost/static_assert.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/utility/base_from_member.hpp>

#if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST)
#include <initializer_list>
#endif

#if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION)
#include <boost/multi_index/detail/archive_constructed.hpp>
#include <boost/multi_index/detail/serialization_version.hpp>
#include <boost/serialization/collection_size_type.hpp>
#include <boost/serialization/nvp.hpp>
#include <boost/serialization/split_member.hpp>
#include <boost/serialization/version.hpp>
#include <boost/throw_exception.hpp>
#endif

#if defined(BOOST_MULTI_INDEX_ENABLE_INVARIANT_CHECKING)
#include <boost/multi_index/detail/invariant_assert.hpp>
#define BOOST_MULTI_INDEX_CHECK_INVARIANT_OF(x)                              \
  detail::scope_guard BOOST_JOIN(check_invariant_,__LINE__)=                 \
    detail::make_obj_guard(x,&multi_index_container::check_invariant_);      \
  BOOST_JOIN(check_invariant_,__LINE__).touch();
#define BOOST_MULTI_INDEX_CHECK_INVARIANT                                    \
  BOOST_MULTI_INDEX_CHECK_INVARIANT_OF(*this)
#else
#define BOOST_MULTI_INDEX_CHECK_INVARIANT_OF(x)
#define BOOST_MULTI_INDEX_CHECK_INVARIANT
#endif

namespace boost{

namespace multi_index{

#if BOOST_WORKAROUND(BOOST_MSVC,BOOST_TESTED_AT(1500))
#pragma warning(push)
#pragma warning(disable:4522) /* spurious warning on multiple operator=()'s */
#endif

template<typename Value,typename IndexSpecifierList,typename Allocator>
class multi_index_container:
  private ::boost::base_from_member<
    typename boost::detail::allocator::rebind_to<
      Allocator,
      typename detail::multi_index_node_type<
        Value,IndexSpecifierList,Allocator>::type
    >::type>,
  BOOST_MULTI_INDEX_PRIVATE_IF_MEMBER_TEMPLATE_FRIENDS detail::header_holder<
    typename boost::detail::allocator::rebind_to<
      Allocator,
      typename detail::multi_index_node_type<
        Value,IndexSpecifierList,Allocator>::type
    >::type::pointer,
    multi_index_container<Value,IndexSpecifierList,Allocator> >,
  public detail::multi_index_base_type<
    Value,IndexSpecifierList,Allocator>::type
{
#if defined(BOOST_MULTI_INDEX_ENABLE_INVARIANT_CHECKING)&&\
    BOOST_WORKAROUND(__MWERKS__,<=0x3003)
/* The "ISO C++ Template Parser" option in CW8.3 has a problem with the
 * lifetime of const references bound to temporaries --precisely what
 * scopeguards are.
 */

#pragma parse_mfunc_templ off
#endif

private:
  BOOST_COPYABLE_AND_MOVABLE(multi_index_container)

#if !defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS)
  template <typename,typename,typename> friend class  detail::index_base;
  template <typename,typename>          friend struct detail::header_holder;
  template <typename,typename>          friend struct detail::converter;
#endif

  typedef typename detail::multi_index_base_type<
      Value,IndexSpecifierList,Allocator>::type   super;
  typedef typename
  boost::detail::allocator::rebind_to<
    Allocator,
    typename super::node_type
  >::type                                         node_allocator;
  typedef ::boost::base_from_member<
    node_allocator>                               bfm_allocator;
  typedef detail::header_holder<
    typename node_allocator::pointer,
    multi_index_container>                        bfm_header;

public:
  /* All types are inherited from super, a few are explicitly
   * brought forward here to save us some typename's.
   */

  typedef typename super::ctor_args_list           ctor_args_list;
  typedef IndexSpecifierList                       index_specifier_type_list;

  typedef typename super::index_type_list          index_type_list;

  typedef typename super::iterator_type_list       iterator_type_list;
  typedef typename super::const_iterator_type_list const_iterator_type_list;
  typedef typename super::value_type               value_type;
  typedef typename super::final_allocator_type     allocator_type;
  typedef typename super::iterator                 iterator;
  typedef typename super::const_iterator           const_iterator;

  BOOST_STATIC_ASSERT(
    detail::no_duplicate_tags_in_index_list<index_type_list>::value);

  /* global project() needs to see this publicly */

  typedef typename super::node_type node_type;

  /* construct/copy/destroy */

  explicit multi_index_container(

#if BOOST_WORKAROUND(__IBMCPP__,<=600)
    /* VisualAge seems to have an ETI issue with the default values
     * for arguments args_list and al.
     */

    const ctor_args_list& args_list=
      typename mpl::identity<multi_index_container>::type::
        ctor_args_list(),
    const allocator_type& al=
      typename mpl::identity<multi_index_container>::type::
        allocator_type()):
#else
    const ctor_args_list& args_list=ctor_args_list(),
    const allocator_type& al=allocator_type()):
#endif

    bfm_allocator(al),
    super(args_list,bfm_allocator::member),
    node_count(0)
  {
    BOOST_MULTI_INDEX_CHECK_INVARIANT;
  }

  explicit multi_index_container(const allocator_type& al):
    bfm_allocator(al),
    super(ctor_args_list(),bfm_allocator::member),
    node_count(0)
  {
    BOOST_MULTI_INDEX_CHECK_INVARIANT;
  }

  template<typename InputIterator>
  multi_index_container(
    InputIterator first,InputIterator last,

#if BOOST_WORKAROUND(__IBMCPP__,<=600)
    /* VisualAge seems to have an ETI issue with the default values
     * for arguments args_list and al.
     */

    const ctor_args_list& args_list=
      typename mpl::identity<multi_index_container>::type::
        ctor_args_list(),
    const allocator_type& al=
      typename mpl::identity<multi_index_container>::type::
        allocator_type()):
#else
    const ctor_args_list& args_list=ctor_args_list(),
    const allocator_type& al=allocator_type()):
#endif

    bfm_allocator(al),
    super(args_list,bfm_allocator::member),
    node_count(0)
  {
    BOOST_MULTI_INDEX_CHECK_INVARIANT;
    BOOST_TRY{
      iterator hint=super::end();
      for(;first!=last;++first){
        hint=super::make_iterator(
          insert_ref_(*first,hint.get_node()).first);
        ++hint;
      }
    }
    BOOST_CATCH(...){
      clear_();
      BOOST_RETHROW;
    }
    BOOST_CATCH_END
  }

#if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST)
  multi_index_container(
    std::initializer_list<Value> list,
    const ctor_args_list& args_list=ctor_args_list(),
    const allocator_type& al=allocator_type()):
    bfm_allocator(al),
    super(args_list,bfm_allocator::member),
    node_count(0)
  {
    BOOST_MULTI_INDEX_CHECK_INVARIANT;
    BOOST_TRY{
      typedef const Value* init_iterator;

      iterator hint=super::end();
      for(init_iterator first=list.begin(),last=list.end();
          first!=last;++first){
        hint=super::make_iterator(insert_(*first,hint.get_node()).first);
        ++hint;
      }
    }
    BOOST_CATCH(...){
      clear_();
      BOOST_RETHROW;
    }
    BOOST_CATCH_END
  }
#endif

  multi_index_container(
    const multi_index_container<Value,IndexSpecifierList,Allocator>& x):
    bfm_allocator(x.bfm_allocator::member),
    bfm_header(),
    super(x),
    node_count(0)
  {
    copy_map_type map(bfm_allocator::member,x.size(),x.header(),header());
    for(const_iterator it=x.begin(),it_end=x.end();it!=it_end;++it){
      map.clone(it.get_node());
    }
    super::copy_(x,map);
    map.release();
    node_count=x.size();

    /* Not until this point are the indices required to be consistent,
     * hence the position of the invariant checker.
     */

    BOOST_MULTI_INDEX_CHECK_INVARIANT;
  }

  multi_index_container(BOOST_RV_REF(multi_index_container) x):
    bfm_allocator(x.bfm_allocator::member),
    bfm_header(),
    super(x,detail::do_not_copy_elements_tag()),
    node_count(0)
  {
    BOOST_MULTI_INDEX_CHECK_INVARIANT;
    BOOST_MULTI_INDEX_CHECK_INVARIANT_OF(x);
    swap_elements_(x);
  }

  ~multi_index_container()
  {
    delete_all_nodes_();
  }

#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
  /* As per http://www.boost.org/doc/html/move/emulation_limitations.html
   * #move.emulation_limitations.assignment_operator
   */

  multi_index_container<Value,IndexSpecifierList,Allocator>& operator=(
    const multi_index_container<Value,IndexSpecifierList,Allocator>& x)
  {
    multi_index_container y(x);
    this->swap(y);
    return *this;
  }
#endif

  multi_index_container<Value,IndexSpecifierList,Allocator>& operator=(
    BOOST_COPY_ASSIGN_REF(multi_index_container) x)
  {
    multi_index_container y(x);
    this->swap(y);
    return *this;
  }

  multi_index_container<Value,IndexSpecifierList,Allocator>& operator=(
    BOOST_RV_REF(multi_index_container) x)
  {
    this->swap(x);
    return *this;
  }

#if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST)
  multi_index_container<Value,IndexSpecifierList,Allocator>& operator=(
    std::initializer_list<Value> list)
  {
    BOOST_MULTI_INDEX_CHECK_INVARIANT;
    typedef const Value* init_iterator;

    multi_index_container x(*this,detail::do_not_copy_elements_tag());
    iterator hint=x.end();
    for(init_iterator first=list.begin(),last=list.end();
        first!=last;++first){
      hint=x.make_iterator(x.insert_(*first,hint.get_node()).first);
      ++hint;
    }
    x.swap_elements_(*this);
    return*this;
  }
#endif

  allocator_type get_allocator()const BOOST_NOEXCEPT
  {
    return allocator_type(bfm_allocator::member);
  }

  /* retrieval of indices by number */

#if !defined(BOOST_NO_MEMBER_TEMPLATES)
  template<int N>
  struct nth_index
  {
    BOOST_STATIC_ASSERT(N>=0&&N<mpl::size<index_type_list>::type::value);
    typedef typename mpl::at_c<index_type_list,N>::type type;
  };

  template<int N>
  typename nth_index<N>::type& get()BOOST_NOEXCEPT
  {
    BOOST_STATIC_ASSERT(N>=0&&N<mpl::size<index_type_list>::type::value);
    return *this;
  }

  template<int N>
  const typename nth_index<N>::type& get()const BOOST_NOEXCEPT
  {
    BOOST_STATIC_ASSERT(N>=0&&N<mpl::size<index_type_list>::type::value);
    return *this;
  }
#endif

  /* retrieval of indices by tag */

#if !defined(BOOST_NO_MEMBER_TEMPLATES)
  template<typename Tag>
  struct index
  {
    typedef typename mpl::find_if<
      index_type_list,
      detail::has_tag<Tag>
    >::type                                    iter;

    BOOST_STATIC_CONSTANT(
      bool,index_found=!(is_same<iter,typename mpl::end<index_type_list>::type >::value));
    BOOST_STATIC_ASSERT(index_found);

    typedef typename mpl::deref<iter>::type    type;
  };

  template<typename Tag>
  typename index<Tag>::type& get()BOOST_NOEXCEPT
  {
    return *this;
  }

  template<typename Tag>
  const typename index<Tag>::type& get()const BOOST_NOEXCEPT
  {
    return *this;
  }
#endif

  /* projection of iterators by number */

#if !defined(BOOST_NO_MEMBER_TEMPLATES)
  template<int N>
  struct nth_index_iterator
  {
    typedef typename nth_index<N>::type::iterator type;
  };

  template<int N>
  struct nth_index_const_iterator
  {
    typedef typename nth_index<N>::type::const_iterator type;
  };

  template<int N,typename IteratorType>
  typename nth_index_iterator<N>::type project(IteratorType it)
  {
    typedef typename nth_index<N>::type index_type;

#if !defined(__SUNPRO_CC)||!(__SUNPRO_CC<0x580) /* fails in Sun C++ 5.7 */
    BOOST_STATIC_ASSERT(
      (mpl::contains<iterator_type_list,IteratorType>::value));
#endif

    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(it);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(
      it,static_cast<typename IteratorType::container_type&>(*this));

    return index_type::make_iterator(static_cast<node_type*>(it.get_node()));
  }

  template<int N,typename IteratorType>
  typename nth_index_const_iterator<N>::type project(IteratorType it)const
  {
    typedef typename nth_index<N>::type index_type;

#if !defined(__SUNPRO_CC)||!(__SUNPRO_CC<0x580) /* fails in Sun C++ 5.7 */
    BOOST_STATIC_ASSERT((
      mpl::contains<iterator_type_list,IteratorType>::value||
      mpl::contains<const_iterator_type_list,IteratorType>::value));
#endif

    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(it);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(
      it,static_cast<const typename IteratorType::container_type&>(*this));
    return index_type::make_iterator(static_cast<node_type*>(it.get_node()));
  }
#endif

  /* projection of iterators by tag */

#if !defined(BOOST_NO_MEMBER_TEMPLATES)
  template<typename Tag>
  struct index_iterator
  {
    typedef typename index<Tag>::type::iterator type;
  };

  template<typename Tag>
  struct index_const_iterator
  {
    typedef typename index<Tag>::type::const_iterator type;
  };

  template<typename Tag,typename IteratorType>
  typename index_iterator<Tag>::type project(IteratorType it)
  {
    typedef typename index<Tag>::type index_type;

#if !defined(__SUNPRO_CC)||!(__SUNPRO_CC<0x580) /* fails in Sun C++ 5.7 */
    BOOST_STATIC_ASSERT(
      (mpl::contains<iterator_type_list,IteratorType>::value));
#endif

    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(it);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(
      it,static_cast<typename IteratorType::container_type&>(*this));
    return index_type::make_iterator(static_cast<node_type*>(it.get_node()));
  }

  template<typename Tag,typename IteratorType>
  typename index_const_iterator<Tag>::type project(IteratorType it)const
  {
    typedef typename index<Tag>::type index_type;

#if !defined(__SUNPRO_CC)||!(__SUNPRO_CC<0x580) /* fails in Sun C++ 5.7 */
    BOOST_STATIC_ASSERT((
      mpl::contains<iterator_type_list,IteratorType>::value||
      mpl::contains<const_iterator_type_list,IteratorType>::value));
#endif

    BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(it);
    BOOST_MULTI_INDEX_CHECK_IS_OWNER(
      it,static_cast<const typename IteratorType::container_type&>(*this));
    return index_type::make_iterator(static_cast<node_type*>(it.get_node()));
  }
#endif

BOOST_MULTI_INDEX_PROTECTED_IF_MEMBER_TEMPLATE_FRIENDS:
  typedef typename super::copy_map_type copy_map_type;

#if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST)
  multi_index_container(
    const multi_index_container<Value,IndexSpecifierList,Allocator>& x,
    detail::do_not_copy_elements_tag):
    bfm_allocator(x.bfm_allocator::member),
    bfm_header(),
    super(x,detail::do_not_copy_elements_tag()),
    node_count(0)
  {
    BOOST_MULTI_INDEX_CHECK_INVARIANT;
  }
#endif

  node_type* header()const
  {
    return &*bfm_header::member;
  }

  node_type* allocate_node()
  {
    return &*bfm_allocator::member.allocate(1);
  }

  void deallocate_node(node_type* x)
  {
    typedef typename node_allocator::pointer node_pointer;
    bfm_allocator::member.deallocate(static_cast<node_pointer>(x),1);
  }

  bool empty_()const
  {
    return node_count==0;
  }

  std::size_t size_()const
  {
    return node_count;
  }

  std::size_t max_size_()const
  {
    return static_cast<std::size_t >(-1);
  }

  template<typename Variant>
  std::pair<node_type*,bool> insert_(const Value& v,Variant variant)
  {
    node_type* x=0;
    node_type* res=super::insert_(v,x,variant);
    if(res==x){
      ++node_count;
      return std::pair<node_type*,bool>(res,true);
    }
    else{
      return std::pair<node_type*,bool>(res,false);
    }
  }

  std::pair<node_type*,bool> insert_(const Value& v)
  {
    return insert_(v,detail::lvalue_tag());
  }

  std::pair<node_type*,bool> insert_rv_(const Value& v)
  {
    return insert_(v,detail::rvalue_tag());
  }

  template<typename T>
  std::pair<node_type*,bool> insert_ref_(T& t)
  {
    node_type* x=allocate_node();
    BOOST_TRY{
      new(&x->value()) value_type(t);
      BOOST_TRY{
        node_type* res=super::insert_(x->value(),x,detail::emplaced_tag());
        if(res==x){
          ++node_count;
          return std::pair<node_type*,bool>(res,true);
        }
        else{
          boost::detail::allocator::destroy(&x->value());
          deallocate_node(x);
          return std::pair<node_type*,bool>(res,false);
        }
      }
      BOOST_CATCH(...){
        boost::detail::allocator::destroy(&x->value());
        BOOST_RETHROW;
      }
      BOOST_CATCH_END
    }
    BOOST_CATCH(...){
      deallocate_node(x);
      BOOST_RETHROW;
    }
    BOOST_CATCH_END
  }

  std::pair<node_type*,bool> insert_ref_(const value_type& x)
  {
    return insert_(x);
  }

  std::pair<node_type*,bool> insert_ref_(value_type& x)
  {
    return insert_(x);
  }

  template<BOOST_MULTI_INDEX_TEMPLATE_PARAM_PACK>
  std::pair<node_type*,bool> emplace_(
    BOOST_MULTI_INDEX_FUNCTION_PARAM_PACK)
  {
    node_type* x=allocate_node();
    BOOST_TRY{
      detail::vartempl_placement_new(
        &x->value(),BOOST_MULTI_INDEX_FORWARD_PARAM_PACK);
      BOOST_TRY{
        node_type* res=super::insert_(x->value(),x,detail::emplaced_tag());
        if(res==x){
          ++node_count;
          return std::pair<node_type*,bool>(res,true);
        }
        else{
          boost::detail::allocator::destroy(&x->value());
          deallocate_node(x);
          return std::pair<node_type*,bool>(res,false);
        }
      }
      BOOST_CATCH(...){
        boost::detail::allocator::destroy(&x->value());
        BOOST_RETHROW;
      }
      BOOST_CATCH_END
    }
    BOOST_CATCH(...){
      deallocate_node(x);
      BOOST_RETHROW;
    }
    BOOST_CATCH_END
  }

  template<typename Variant>
  std::pair<node_type*,bool> insert_(
    const Value& v,node_type* position,Variant variant)
  {
    node_type* x=0;
    node_type* res=super::insert_(v,position,x,variant);
    if(res==x){
      ++node_count;
      return std::pair<node_type*,bool>(res,true);
    }
    else{
      return std::pair<node_type*,bool>(res,false);
    }
  }

  std::pair<node_type*,bool> insert_(const Value& v,node_type* position)
  {
    return insert_(v,position,detail::lvalue_tag());
  }

  std::pair<node_type*,bool> insert_rv_(const Value& v,node_type* position)
  {
    return insert_(v,position,detail::rvalue_tag());
  }

  template<typename T>
  std::pair<node_type*,bool> insert_ref_(
    T& t,node_type* position)
  {
    node_type* x=allocate_node();
    BOOST_TRY{
      new(&x->value()) value_type(t);
      BOOST_TRY{
        node_type* res=super::insert_(
          x->value(),position,x,detail::emplaced_tag());
        if(res==x){
          ++node_count;
          return std::pair<node_type*,bool>(res,true);
        }
        else{
          boost::detail::allocator::destroy(&x->value());
          deallocate_node(x);
          return std::pair<node_type*,bool>(res,false);
        }
      }
      BOOST_CATCH(...){
        boost::detail::allocator::destroy(&x->value());
        BOOST_RETHROW;
      }
      BOOST_CATCH_END
    }
    BOOST_CATCH(...){
      deallocate_node(x);
      BOOST_RETHROW;
    }
    BOOST_CATCH_END
  }

  std::pair<node_type*,bool> insert_ref_(
    const value_type& x,node_type* position)
  {
    return insert_(x,position);
  }

  std::pair<node_type*,bool> insert_ref_(
    value_type& x,node_type* position)
  {
    return insert_(x,position);
  }

  template<BOOST_MULTI_INDEX_TEMPLATE_PARAM_PACK>
  std::pair<node_type*,bool> emplace_hint_(
    node_type* position,
    BOOST_MULTI_INDEX_FUNCTION_PARAM_PACK)
  {
    node_type* x=allocate_node();
    BOOST_TRY{
      detail::vartempl_placement_new(
        &x->value(),BOOST_MULTI_INDEX_FORWARD_PARAM_PACK);
      BOOST_TRY{
        node_type* res=super::insert_(
          x->value(),position,x,detail::emplaced_tag());
        if(res==x){
          ++node_count;
          return std::pair<node_type*,bool>(res,true);
        }
        else{
          boost::detail::allocator::destroy(&x->value());
          deallocate_node(x);
          return std::pair<node_type*,bool>(res,false);
        }
      }
      BOOST_CATCH(...){
        boost::detail::allocator::destroy(&x->value());
        BOOST_RETHROW;
      }
      BOOST_CATCH_END
    }
    BOOST_CATCH(...){
      deallocate_node(x);
      BOOST_RETHROW;
    }
    BOOST_CATCH_END
  }

  void erase_(node_type* x)
  {
    --node_count;
    super::erase_(x);
    deallocate_node(x);
  }

  void delete_node_(node_type* x)
  {
    super::delete_node_(x);
    deallocate_node(x);
  }

  void delete_all_nodes_()
  {
    super::delete_all_nodes_();
  }

  void clear_()
  {
    delete_all_nodes_();
    super::clear_();
    node_count=0;
  }

  void swap_(multi_index_container<Value,IndexSpecifierList,Allocator>& x)
  {
    if(bfm_allocator::member!=x.bfm_allocator::member){
      detail::adl_swap(bfm_allocator::member,x.bfm_allocator::member);
    }
    std::swap(bfm_header::member,x.bfm_header::member);
    super::swap_(x);
    std::swap(node_count,x.node_count);
  }

  void swap_elements_(
    multi_index_container<Value,IndexSpecifierList,Allocator>& x)
  {
    std::swap(bfm_header::member,x.bfm_header::member);
    super::swap_elements_(x);
    std::swap(node_count,x.node_count);
  }

  bool replace_(const Value& k,node_type* x)
  {
    return super::replace_(k,x,detail::lvalue_tag());
  }

  bool replace_rv_(const Value& k,node_type* x)
  {
    return super::replace_(k,x,detail::rvalue_tag());
  }

  template<typename Modifier>
  bool modify_(Modifier& mod,node_type* x)
  {
    mod(const_cast<value_type&>(x->value()));

    BOOST_TRY{
      if(!super::modify_(x)){
        deallocate_node(x);
        --node_count;
        return false;
      }
      else return true;
    }
    BOOST_CATCH(...){
      deallocate_node(x);
      --node_count;
      BOOST_RETHROW;
    }
    BOOST_CATCH_END
  }

  template<typename Modifier,typename Rollback>
  bool modify_(Modifier& mod,Rollback& back_,node_type* x)
  {
    mod(const_cast<value_type&>(x->value()));

    bool b;
    BOOST_TRY{
      b=super::modify_rollback_(x);
    }
    BOOST_CATCH(...){
      BOOST_TRY{
        back_(const_cast<value_type&>(x->value()));
        BOOST_RETHROW;
      }
      BOOST_CATCH(...){
        this->erase_(x);
        BOOST_RETHROW;
      }
      BOOST_CATCH_END
    }
    BOOST_CATCH_END

    BOOST_TRY{
      if(!b){
        back_(const_cast<value_type&>(x->value()));
        return false;
      }
      else return true;
    }
    BOOST_CATCH(...){
      this->erase_(x);
      BOOST_RETHROW;
    }
    BOOST_CATCH_END
  }

#if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION)
  /* serialization */

  friend class boost::serialization::access;

  BOOST_SERIALIZATION_SPLIT_MEMBER()

  typedef typename super::index_saver_type        index_saver_type;
  typedef typename super::index_loader_type       index_loader_type;

  template<class Archive>
  void save(Archive& ar,const unsigned int version)const
  {
    const serialization::collection_size_type       s(size_());
    const detail::serialization_version<value_type> value_version;
    ar<<serialization::make_nvp("count",s);
    ar<<serialization::make_nvp("value_version",value_version);

    index_saver_type sm(bfm_allocator::member,s);

    for(iterator it=super::begin(),it_end=super::end();it!=it_end;++it){
      serialization::save_construct_data_adl(ar,&*it,value_version);
      ar<<serialization::make_nvp("item",*it);
      sm.add(it.get_node(),ar,version);
    }
    sm.add_track(header(),ar,version);

    super::save_(ar,version,sm);
  }

  template<class Archive>
  void load(Archive& ar,const unsigned int version)
  {
    BOOST_MULTI_INDEX_CHECK_INVARIANT;

    clear_();
    serialization::collection_size_type       s;
    detail::serialization_version<value_type> value_version;
    if(version<1){
      std::size_t sz;
      ar>>serialization::make_nvp("count",sz);
      s=static_cast<serialization::collection_size_type>(sz);
    }
    else{
      ar>>serialization::make_nvp("count",s);
    }
    if(version<2){
      value_version=0;
    }
    else{
      ar>>serialization::make_nvp("value_version",value_version);
    }

    index_loader_type lm(bfm_allocator::member,s);

    for(std::size_t n=0;n<s;++n){
      detail::archive_constructed<Value> value("item",ar,value_version);
      std::pair<node_type*,bool> p=insert_(
        value.get(),super::end().get_node());
      if(!p.second)throw_exception(
        archive::archive_exception(
          archive::archive_exception::other_exception));
      ar.reset_object_address(&p.first->value(),&value.get());
      lm.add(p.first,ar,version);
    }
    lm.add_track(header(),ar,version);

    super::load_(ar,version,lm);
  }
#endif

#if defined(BOOST_MULTI_INDEX_ENABLE_INVARIANT_CHECKING)
  /* invariant stuff */

  bool invariant_()const
  {
    return super::invariant_();
  }

  void check_invariant_()const
  {
    BOOST_MULTI_INDEX_INVARIANT_ASSERT(invariant_());
  }
#endif

private:
  std::size_t node_count;

#if defined(BOOST_MULTI_INDEX_ENABLE_INVARIANT_CHECKING)&&\
    BOOST_WORKAROUND(__MWERKS__,<=0x3003)
#pragma parse_mfunc_templ reset
#endif
};

#if BOOST_WORKAROUND(BOOST_MSVC,BOOST_TESTED_AT(1500))
#pragma warning(pop) /* C4522 */
#endif

/* retrieval of indices by number */

template<typename MultiIndexContainer,int N>
struct nth_index
{
  BOOST_STATIC_CONSTANT(
    int,
    M=mpl::size<typename MultiIndexContainer::index_type_list>::type::value);
  BOOST_STATIC_ASSERT(N>=0&&N<M);
  typedef typename mpl::at_c<
    typename MultiIndexContainer::index_type_list,N>::type type;
};

template<int N,typename Value,typename IndexSpecifierList,typename Allocator>
typename nth_index<
  multi_index_container<Value,IndexSpecifierList,Allocator>,N>::type&
get(
  multi_index_container<Value,IndexSpecifierList,Allocator>& m)BOOST_NOEXCEPT
{
  typedef multi_index_container<
    Value,IndexSpecifierList,Allocator>    multi_index_type;
  typedef typename nth_index<
    multi_index_container<
      Value,IndexSpecifierList,Allocator>,
    N
  >::type                                  index_type;

  BOOST_STATIC_ASSERT(N>=0&&
    N<
    mpl::size<
      BOOST_DEDUCED_TYPENAME multi_index_type::index_type_list
    >::type::value);

  return detail::converter<multi_index_type,index_type>::index(m);
}

template<int N,typename Value,typename IndexSpecifierList,typename Allocator>
const typename nth_index<
  multi_index_container<Value,IndexSpecifierList,Allocator>,N>::type&
get(
  const multi_index_container<Value,IndexSpecifierList,Allocator>& m
)BOOST_NOEXCEPT
{
  typedef multi_index_container<
    Value,IndexSpecifierList,Allocator>    multi_index_type;
  typedef typename nth_index<
    multi_index_container<
      Value,IndexSpecifierList,Allocator>,
    N
  >::type                                  index_type;

  BOOST_STATIC_ASSERT(N>=0&&
    N<
    mpl::size<
      BOOST_DEDUCED_TYPENAME multi_index_type::index_type_list
    >::type::value);

  return detail::converter<multi_index_type,index_type>::index(m);
}

/* retrieval of indices by tag */

template<typename MultiIndexContainer,typename Tag>
struct index
{
  typedef typename MultiIndexContainer::index_type_list index_type_list;

  typedef typename mpl::find_if<
    index_type_list,
    detail::has_tag<Tag>
  >::type                                      iter;

  BOOST_STATIC_CONSTANT(
    bool,index_found=!(is_same<iter,typename mpl::end<index_type_list>::type >::value));
  BOOST_STATIC_ASSERT(index_found);

  typedef typename mpl::deref<iter>::type       type;
};

template<
  typename Tag,typename Value,typename IndexSpecifierList,typename Allocator
>
typename ::boost::multi_index::index<
  multi_index_container<Value,IndexSpecifierList,Allocator>,Tag>::type&
get(
  multi_index_container<Value,IndexSpecifierList,Allocator>& m)BOOST_NOEXCEPT
{
  typedef multi_index_container<
    Value,IndexSpecifierList,Allocator>         multi_index_type;
  typedef typename ::boost::multi_index::index<
    multi_index_container<
      Value,IndexSpecifierList,Allocator>,
    Tag
  >::type                                       index_type;

  return detail::converter<multi_index_type,index_type>::index(m);
}

template<
  typename Tag,typename Value,typename IndexSpecifierList,typename Allocator
>
const typename ::boost::multi_index::index<
  multi_index_container<Value,IndexSpecifierList,Allocator>,Tag>::type&
get(
  const multi_index_container<Value,IndexSpecifierList,Allocator>& m
)BOOST_NOEXCEPT
{
  typedef multi_index_container<
    Value,IndexSpecifierList,Allocator>         multi_index_type;
  typedef typename ::boost::multi_index::index<
    multi_index_container<
      Value,IndexSpecifierList,Allocator>,
    Tag
  >::type                                       index_type;

  return detail::converter<multi_index_type,index_type>::index(m);
}

/* projection of iterators by number */

template<typename MultiIndexContainer,int N>
struct nth_index_iterator
{
  typedef typename nth_index<MultiIndexContainer,N>::type::iterator type;
};

template<typename MultiIndexContainer,int N>
struct nth_index_const_iterator
{
  typedef typename nth_index<MultiIndexContainer,N>::type::const_iterator type;
};

template<
  int N,typename IteratorType,
  typename Value,typename IndexSpecifierList,typename Allocator>
typename nth_index_iterator<
  multi_index_container<Value,IndexSpecifierList,Allocator>,N>::type
project(
  multi_index_container<Value,IndexSpecifierList,Allocator>& m,
  IteratorType it)
{
  typedef multi_index_container<
    Value,IndexSpecifierList,Allocator>                multi_index_type;
  typedef typename nth_index<multi_index_type,N>::type index_type;

#if !defined(__SUNPRO_CC)||!(__SUNPRO_CC<0x580) /* Sun C++ 5.7 fails */
  BOOST_STATIC_ASSERT((
    mpl::contains<
      BOOST_DEDUCED_TYPENAME multi_index_type::iterator_type_list,
      IteratorType>::value));
#endif

  BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(it);

#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
  typedef detail::converter<
    multi_index_type,
    BOOST_DEDUCED_TYPENAME IteratorType::container_type> converter;
  BOOST_MULTI_INDEX_CHECK_IS_OWNER(it,converter::index(m));
#endif

  return detail::converter<multi_index_type,index_type>::iterator(
    m,static_cast<typename multi_index_type::node_type*>(it.get_node()));
}

template<
  int N,typename IteratorType,
  typename Value,typename IndexSpecifierList,typename Allocator>
typename nth_index_const_iterator<
  multi_index_container<Value,IndexSpecifierList,Allocator>,N>::type
project(
  const multi_index_container<Value,IndexSpecifierList,Allocator>& m,
  IteratorType it)
{
  typedef multi_index_container<
    Value,IndexSpecifierList,Allocator>                multi_index_type;
  typedef typename nth_index<multi_index_type,N>::type index_type;

#if !defined(__SUNPRO_CC)||!(__SUNPRO_CC<0x580) /* Sun C++ 5.7 fails */
  BOOST_STATIC_ASSERT((
    mpl::contains<
      BOOST_DEDUCED_TYPENAME multi_index_type::iterator_type_list,
      IteratorType>::value||
    mpl::contains<
      BOOST_DEDUCED_TYPENAME multi_index_type::const_iterator_type_list,
      IteratorType>::value));
#endif

  BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(it);

#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
  typedef detail::converter<
    multi_index_type,
    BOOST_DEDUCED_TYPENAME IteratorType::container_type> converter;
  BOOST_MULTI_INDEX_CHECK_IS_OWNER(it,converter::index(m));
#endif

  return detail::converter<multi_index_type,index_type>::const_iterator(
    m,static_cast<typename multi_index_type::node_type*>(it.get_node()));
}

/* projection of iterators by tag */

template<typename MultiIndexContainer,typename Tag>
struct index_iterator
{
  typedef typename ::boost::multi_index::index<
    MultiIndexContainer,Tag>::type::iterator    type;
};

template<typename MultiIndexContainer,typename Tag>
struct index_const_iterator
{
  typedef typename ::boost::multi_index::index<
    MultiIndexContainer,Tag>::type::const_iterator type;
};

template<
  typename Tag,typename IteratorType,
  typename Value,typename IndexSpecifierList,typename Allocator>
typename index_iterator<
  multi_index_container<Value,IndexSpecifierList,Allocator>,Tag>::type
project(
  multi_index_container<Value,IndexSpecifierList,Allocator>& m,
  IteratorType it)
{
  typedef multi_index_container<
    Value,IndexSpecifierList,Allocator>         multi_index_type;
  typedef typename ::boost::multi_index::index<
    multi_index_type,Tag>::type                 index_type;

#if !defined(__SUNPRO_CC)||!(__SUNPRO_CC<0x580) /* Sun C++ 5.7 fails */
  BOOST_STATIC_ASSERT((
    mpl::contains<
      BOOST_DEDUCED_TYPENAME multi_index_type::iterator_type_list,
      IteratorType>::value));
#endif

  BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(it);

#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
  typedef detail::converter<
    multi_index_type,
    BOOST_DEDUCED_TYPENAME IteratorType::container_type> converter;
  BOOST_MULTI_INDEX_CHECK_IS_OWNER(it,converter::index(m));
#endif

  return detail::converter<multi_index_type,index_type>::iterator(
    m,static_cast<typename multi_index_type::node_type*>(it.get_node()));
}

template<
  typename Tag,typename IteratorType,
  typename Value,typename IndexSpecifierList,typename Allocator>
typename index_const_iterator<
  multi_index_container<Value,IndexSpecifierList,Allocator>,Tag>::type
project(
  const multi_index_container<Value,IndexSpecifierList,Allocator>& m,
  IteratorType it)
{
  typedef multi_index_container<
    Value,IndexSpecifierList,Allocator>         multi_index_type;
  typedef typename ::boost::multi_index::index<
    multi_index_type,Tag>::type                 index_type;

#if !defined(__SUNPRO_CC)||!(__SUNPRO_CC<0x580) /* Sun C++ 5.7 fails */
  BOOST_STATIC_ASSERT((
    mpl::contains<
      BOOST_DEDUCED_TYPENAME multi_index_type::iterator_type_list,
      IteratorType>::value||
    mpl::contains<
      BOOST_DEDUCED_TYPENAME multi_index_type::const_iterator_type_list,
      IteratorType>::value));
#endif

  BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(it);

#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
  typedef detail::converter<
    multi_index_type,
    BOOST_DEDUCED_TYPENAME IteratorType::container_type> converter;
  BOOST_MULTI_INDEX_CHECK_IS_OWNER(it,converter::index(m));
#endif

  return detail::converter<multi_index_type,index_type>::const_iterator(
    m,static_cast<typename multi_index_type::node_type*>(it.get_node()));
}

/* Comparison. Simple forward to first index. */

template<
  typename Value1,typename IndexSpecifierList1,typename Allocator1,
  typename Value2,typename IndexSpecifierList2,typename Allocator2
>
bool operator==(
  const multi_index_container<Value1,IndexSpecifierList1,Allocator1>& x,
  const multi_index_container<Value2,IndexSpecifierList2,Allocator2>& y)
{
  return get<0>(x)==get<0>(y);
}

template<
  typename Value1,typename IndexSpecifierList1,typename Allocator1,
  typename Value2,typename IndexSpecifierList2,typename Allocator2
>
bool operator<(
  const multi_index_container<Value1,IndexSpecifierList1,Allocator1>& x,
  const multi_index_container<Value2,IndexSpecifierList2,Allocator2>& y)
{
  return get<0>(x)<get<0>(y);
}

template<
  typename Value1,typename IndexSpecifierList1,typename Allocator1,
  typename Value2,typename IndexSpecifierList2,typename Allocator2
>
bool operator!=(
  const multi_index_container<Value1,IndexSpecifierList1,Allocator1>& x,
  const multi_index_container<Value2,IndexSpecifierList2,Allocator2>& y)
{
  return get<0>(x)!=get<0>(y);
}

template<
  typename Value1,typename IndexSpecifierList1,typename Allocator1,
  typename Value2,typename IndexSpecifierList2,typename Allocator2
>
bool operator>(
  const multi_index_container<Value1,IndexSpecifierList1,Allocator1>& x,
  const multi_index_container<Value2,IndexSpecifierList2,Allocator2>& y)
{
  return get<0>(x)>get<0>(y);
}

template<
  typename Value1,typename IndexSpecifierList1,typename Allocator1,
  typename Value2,typename IndexSpecifierList2,typename Allocator2
>
bool operator>=(
  const multi_index_container<Value1,IndexSpecifierList1,Allocator1>& x,
  const multi_index_container<Value2,IndexSpecifierList2,Allocator2>& y)
{
  return get<0>(x)>=get<0>(y);
}

template<
  typename Value1,typename IndexSpecifierList1,typename Allocator1,
  typename Value2,typename IndexSpecifierList2,typename Allocator2
>
bool operator<=(
  const multi_index_container<Value1,IndexSpecifierList1,Allocator1>& x,
  const multi_index_container<Value2,IndexSpecifierList2,Allocator2>& y)
{
  return get<0>(x)<=get<0>(y);
}

/*  specialized algorithms */

template<typename Value,typename IndexSpecifierList,typename Allocator>
void swap(
  multi_index_container<Value,IndexSpecifierList,Allocator>& x,
  multi_index_container<Value,IndexSpecifierList,Allocator>& y)
{
  x.swap(y);
}

} /* namespace multi_index */

#if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION)
/* class version = 1 : we now serialize the size through
 * boost::serialization::collection_size_type.
 * class version = 2 : proper use of {save|load}_construct_data.
 */

namespace serialization {
template<typename Value,typename IndexSpecifierList,typename Allocator>
struct version<
  boost::multi_index_container<Value,IndexSpecifierList,Allocator>
>
{
  BOOST_STATIC_CONSTANT(int,value=2);
};
} /* namespace serialization */
#endif

/* Associated global functions are promoted to namespace boost, except
 * comparison operators and swap, which are meant to be Koenig looked-up.
 */

using multi_index::get;
using multi_index::project;

} /* namespace boost */

#undef BOOST_MULTI_INDEX_CHECK_INVARIANT
#undef BOOST_MULTI_INDEX_CHECK_INVARIANT_OF

#endif


code:
/* Copyright 2003-2013 Joaquin M Lopez Munoz.
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE_1_0.txt or copy at
 * http://www.boost.org/LICENSE_1_0.txt)
 *
 * See http://www.boost.org/libs/multi_index for library home page.
 */

#ifndef BOOST_MULTI_INDEX_FWD_HPP
#define BOOST_MULTI_INDEX_FWD_HPP

#if defined(_MSC_VER)
#pragma once
#endif

#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
#include <boost/multi_index/identity.hpp>
#include <boost/multi_index/indexed_by.hpp>
#include <boost/multi_index/ordered_index_fwd.hpp>
#include <memory>

namespace boost{

namespace multi_index{

/* Default value for IndexSpecifierList specifies a container
 * equivalent to std::set<Value>.
 */

template<
  typename Value,
  typename IndexSpecifierList=indexed_by<ordered_unique<identity<Value> > >,
  typename Allocator=std::allocator<Value> >
class multi_index_container;

template<typename MultiIndexContainer,int N>
struct nth_index;

template<typename MultiIndexContainer,typename Tag>
struct index;

template<typename MultiIndexContainer,int N>
struct nth_index_iterator;

template<typename MultiIndexContainer,int N>
struct nth_index_const_iterator;

template<typename MultiIndexContainer,typename Tag>
struct index_iterator;

template<typename MultiIndexContainer,typename Tag>
struct index_const_iterator;

/* get and project functions not fwd declared due to problems
 * with dependent typenames
 */

template<
  typename Value1,typename IndexSpecifierList1,typename Allocator1,
  typename Value2,typename IndexSpecifierList2,typename Allocator2
>
bool operator==(
  const multi_index_container<Value1,IndexSpecifierList1,Allocator1>& x,
  const multi_index_container<Value2,IndexSpecifierList2,Allocator2>& y);

template<
  typename Value1,typename IndexSpecifierList1,typename Allocator1,
  typename Value2,typename IndexSpecifierList2,typename Allocator2
>
bool operator<(
  const multi_index_container<Value1,IndexSpecifierList1,Allocator1>& x,
  const multi_index_container<Value2,IndexSpecifierList2,Allocator2>& y);

template<
  typename Value1,typename IndexSpecifierList1,typename Allocator1,
  typename Value2,typename IndexSpecifierList2,typename Allocator2
>
bool operator!=(
  const multi_index_container<Value1,IndexSpecifierList1,Allocator1>& x,
  const multi_index_container<Value2,IndexSpecifierList2,Allocator2>& y);

template<
  typename Value1,typename IndexSpecifierList1,typename Allocator1,
  typename Value2,typename IndexSpecifierList2,typename Allocator2
>
bool operator>(
  const multi_index_container<Value1,IndexSpecifierList1,Allocator1>& x,
  const multi_index_container<Value2,IndexSpecifierList2,Allocator2>& y);

template<
  typename Value1,typename IndexSpecifierList1,typename Allocator1,
  typename Value2,typename IndexSpecifierList2,typename Allocator2
>
bool operator>=(
  const multi_index_container<Value1,IndexSpecifierList1,Allocator1>& x,
  const multi_index_container<Value2,IndexSpecifierList2,Allocator2>& y);

template<
  typename Value1,typename IndexSpecifierList1,typename Allocator1,
  typename Value2,typename IndexSpecifierList2,typename Allocator2
>
bool operator<=(
  const multi_index_container<Value1,IndexSpecifierList1,Allocator1>& x,
  const multi_index_container<Value2,IndexSpecifierList2,Allocator2>& y);

template<typename Value,typename IndexSpecifierList,typename Allocator>
void swap(
  multi_index_container<Value,IndexSpecifierList,Allocator>& x,
  multi_index_container<Value,IndexSpecifierList,Allocator>& y);

} /* namespace multi_index */

/* multi_index_container, being the main type of this library, is promoted to
 * namespace boost.
 */

using multi_index::multi_index_container;

} /* namespace boost */

#endif