epoc32/include/stdapis/boost/multi_index/detail/safe_ctr_proxy.hpp
author William Roberts <williamr@symbian.org>
Wed, 31 Mar 2010 12:27:01 +0100
branchSymbian2
changeset 3 e1b950c65cb4
permissions -rw-r--r--
Attempt to represent the S^2->S^3 header reorganisation as a series of "hg rename" operations
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/* Copyright 2003-2006 Joaquín M López Muñoz.
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 * Distributed under the Boost Software License, Version 1.0.
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 * (See accompanying file LICENSE_1_0.txt or copy at
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 * http://www.boost.org/LICENSE_1_0.txt)
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 *
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 * See http://www.boost.org/libs/multi_index for library home page.
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 */
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#ifndef BOOST_MULTI_INDEX_DETAIL_SAFE_CTR_PROXY_HPP
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#define BOOST_MULTI_INDEX_DETAIL_SAFE_CTR_PROXY_HPP
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#if defined(_MSC_VER)&&(_MSC_VER>=1200)
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#pragma once
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#endif
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#if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE)
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#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
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#include <boost/detail/workaround.hpp>
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#if BOOST_WORKAROUND(BOOST_MSVC,<1300)
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#include <boost/multi_index/detail/safe_mode.hpp>
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namespace boost{
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namespace multi_index{
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namespace detail{
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/* A safe iterator is instantiated in the form
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 * safe_iterator<Iterator,Container>: MSVC++ 6.0 has serious troubles with
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 * the resulting symbols names, given that index names (which stand for
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 * Container) are fairly long themselves. safe_ctr_proxy does not statically
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 * depend on Container, and provides the necessary methods (begin and end) to
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 * the safe mode framework via an abstract interface. With safe_ctr_proxy,
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 * instead of deriving from safe_container<Container> the following base class
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 * must be used:
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 *
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 *   safe_ctr_proxy_impl<Iterator,Container>
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 *
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 * where Iterator is the type of the *unsafe* iterator being wrapped.
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 * The corresponding safe iterator instantiation is then
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 * 
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 *   safe_iterator<Iterator,safe_ctr_proxy<Iterator> >,
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 *
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 * which does not include the name of Container.
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 */
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template<typename Iterator>
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class safe_ctr_proxy:
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  public safe_mode::safe_container<safe_ctr_proxy<Iterator> >
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{
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public:
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  typedef safe_mode::safe_iterator<Iterator,safe_ctr_proxy> iterator;
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  typedef iterator                                          const_iterator;
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  iterator       begin(){return begin_impl();}
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  const_iterator begin()const{return begin_impl();}
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  iterator       end(){return end_impl();}
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  const_iterator end()const{return end_impl();}
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protected:
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  virtual iterator       begin_impl()=0;
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  virtual const_iterator begin_impl()const=0;
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  virtual iterator       end_impl()=0;
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  virtual const_iterator end_impl()const=0;
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};
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template<typename Iterator,typename Container>
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class safe_ctr_proxy_impl:public safe_ctr_proxy<Iterator>
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{
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  typedef safe_ctr_proxy<Iterator> super;
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  typedef Container                container_type;
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public:
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  typedef typename super::iterator       iterator;
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  typedef typename super::const_iterator const_iterator;
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  virtual iterator       begin_impl(){return container().begin();}
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  virtual const_iterator begin_impl()const{return container().begin();}
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  virtual iterator       end_impl(){return container().end();}
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  virtual const_iterator end_impl()const{return container().end();}
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private:
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  container_type& container()
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  {
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    return *static_cast<container_type*>(this);
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  }
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  const container_type& container()const
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  {
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    return *static_cast<const container_type*>(this);
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  }
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};
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} /* namespace multi_index::detail */
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} /* namespace multi_index */
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} /* namespace boost */
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#endif /* workaround */
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#endif /* BOOST_MULTI_INDEX_ENABLE_SAFE_MODE */
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#endif