map_view_base.hpp

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    template< class CompatibleKey >
    const data_type_ & at(const CompatibleKey& k) const
    {
        typedef BOOST_DEDUCED_TYPENAME ::boost::bimaps::support::
                const_iterator_type_by<Tag,BimapType>::type const_iterator;

        const_iterator iter = derived().find(k);
        if( iter == derived().end() )
        {
            ::boost::throw_exception(
                std::out_of_range("bimap<>: invalid key")
            );
        }
        return iter->second;
    }

    template< class CompatibleKey >
    data_type_ & operator[](const CompatibleKey& k)
    {
        typedef BOOST_DEDUCED_TYPENAME ::boost::bimaps::support::
                      iterator_type_by<Tag,BimapType>::type       iterator;

        typedef BOOST_DEDUCED_TYPENAME ::boost::bimaps::support::
                         value_type_by<Tag,BimapType>::type     value_type;

        iterator iter = derived().find(k);
        if( iter == derived().end() )
        {
            iter = derived().insert( value_type(k,data_type_()) ).first;
        }
        return iter->second;
    }

    protected:

    typedef mutable_data_unique_map_view_access
                mutable_data_unique_map_view_access_;

    private:

    // Curiously Recurring Template interface.

    Derived& derived()
    {
        return *static_cast<Derived*>(this);
    }

    Derived const& derived() const
    {
        return *static_cast<Derived const*>(this);
    }
};


template< class Derived, class Tag, class BimapType>
class non_mutable_data_unique_map_view_access
{
    typedef BOOST_DEDUCED_TYPENAME ::boost::bimaps::support::
                          data_type_by<Tag,BimapType>::type      data_type_;

    public:

    template< class CompatibleKey >
    const data_type_ & at(const CompatibleKey& k) const
    {
        typedef BOOST_DEDUCED_TYPENAME ::boost::bimaps::support::
                const_iterator_type_by<Tag,BimapType>::type const_iterator;

        const_iterator iter = derived().find(k);
        if( iter == derived().end() )
        {
            ::boost::throw_exception(
                std::out_of_range("bimap<>: invalid key")
            );
        }
        return iter->second;
    }

    template< class CompatibleKey >
    data_type_ & operator[](const CompatibleKey& k)
    {
        BOOST_BIMAP_STATIC_ERROR( OPERATOR_BRACKET_IS_NOT_SUPPORTED, (Derived));
    }

    protected:

    typedef non_mutable_data_unique_map_view_access
                non_mutable_data_unique_map_view_access_;

    private:

    // Curiously Recurring Template interface.

    Derived& derived()
    {
        return *static_cast<Derived*>(this);
    }

    Derived const& derived() const
    {
        return *static_cast<Derived const*>(this);
    }
};


template< class Derived, class Tag, class BimapType>
struct unique_map_view_access
{
    private:
    typedef BOOST_DEDUCED_TYPENAME ::boost::bimaps::support::
        value_type_by<Tag,BimapType>::type value_type;

    public:
    typedef BOOST_DEDUCED_TYPENAME ::boost::mpl::if_
    <
        typename ::boost::is_const<
            BOOST_DEDUCED_TYPENAME value_type::second_type >::type,

        non_mutable_data_unique_map_view_access<Derived,Tag,BimapType>,
        mutable_data_unique_map_view_access<Derived,Tag,BimapType>

    >::type type;
};

// Map views specialize the following structs to provide to the bimap class
// the extra side typedefs (i.e. left_local_iterator for unordered_maps, 
// right_range_type for maps)

template< class MapView >
struct  left_map_view_extra_typedefs {};

template< class MapView >
struct right_map_view_extra_typedefs {};

} // namespace detail

// This function is already part of Boost.Lambda.
// They may be moved to Boost.Utility.

template <class T> inline const T&  make_const(const T& t) { return t; }

} // namespace bimaps
} // namespace boost


// The following macros avoids code duplication in map views
// Maybe this can be changed in the future using a scheme similar to
// the one used with map_view_base.

/*===========================================================================*/
#define BOOST_BIMAP_MAP_VIEW_RANGE_IMPLEMENTATION(BASE)                       \
                                                                              \
typedef std::pair<                                                            \
    BOOST_DEDUCED_TYPENAME base_::iterator,                                   \
    BOOST_DEDUCED_TYPENAME base_::iterator> range_type;                       \
                                                                              \
typedef std::pair<                                                            \
    BOOST_DEDUCED_TYPENAME base_::const_iterator,                             \
    BOOST_DEDUCED_TYPENAME base_::const_iterator> const_range_type;           \
                                                                              \
                                                                              \
template< class LowerBounder, class UpperBounder>                             \
range_type range(LowerBounder lower,UpperBounder upper)                       \
{                                                                             \
    std::pair<                                                                \
                                                                              \
        BOOST_DEDUCED_TYPENAME BASE::base_type::iterator,                     \
        BOOST_DEDUCED_TYPENAME BASE::base_type::iterator                      \
                                                                              \
    > r( this->base().range(lower,upper) );                                   \
                                                                              \
    return range_type(                                                        \
        this->template functor<                                               \
            BOOST_DEDUCED_TYPENAME BASE::iterator_from_base                   \
        >()                                         ( r.first ),              \
        this->template functor<                                               \
            BOOST_DEDUCED_TYPENAME BASE::iterator_from_base                   \
        >()                                         ( r.second )              \
    );                                                                        \
}                                                                             \
                                                                              \
template< class LowerBounder, class UpperBounder>                             \
const_range_type range(LowerBounder lower,UpperBounder upper) const           \
{                                                                             \
    std::pair<                                                                \
                                                                              \
        BOOST_DEDUCED_TYPENAME BASE::base_type::const_iterator,               \
        BOOST_DEDUCED_TYPENAME BASE::base_type::const_iterator                \
                                                                              \
    > r( this->base().range(lower,upper) );                                   \
                                                                              \
    return const_range_type(                                                  \
        this->template functor<                                               \
            BOOST_DEDUCED_TYPENAME BASE::iterator_from_base                   \
        >()                                         ( r.first ),              \
        this->template functor<                                               \
            BOOST_DEDUCED_TYPENAME BASE::iterator_from_base                   \
        >()                                         ( r.second )              \
    );                                                                        \
}
/*===========================================================================*/


/*===========================================================================*/
#define BOOST_BIMAP_VIEW_ASSIGN_IMPLEMENTATION(BASE)                          \
                                                                              \
template< class InputIterator >                                               \
void assign(InputIterator first,InputIterator last)                           \
{                                                                             \
    this->clear();                                                            \
    this->insert(this->end(),first,last);                                     \
}                                                                             \
                                                                              \
void assign(BOOST_DEDUCED_TYPENAME BASE::size_type n,                         \
            const BOOST_DEDUCED_TYPENAME BASE::value_type& v)                 \
{                                                                             \
    this->clear();                                                            \
    for(BOOST_DEDUCED_TYPENAME BASE::size_type i = 0 ; i < n ; ++n)           \
    {                                                                         \
        this->push_back(v);                                                   \
    }                                                                         \
}
/*===========================================================================*/


/*===========================================================================*/
#define BOOST_BIMAP_VIEW_FRONT_BACK_IMPLEMENTATION(BASE)                      \
                                                                              \
BOOST_DEDUCED_TYPENAME BASE::reference front()                                \
{                                                                             \
    return this->template functor<                                            \
        BOOST_DEDUCED_TYPENAME base_::value_from_base>()                      \
    (                                                                         \
        const_cast                                                            \
        <                                                                     \
            BOOST_DEDUCED_TYPENAME BASE::base_type::value_type &              \
                                                                              \
        > ( this->base().front() )                                            \
    );                                                                        \
}                                                                             \
                                                                              \
BOOST_DEDUCED_TYPENAME BASE::reference back()                                 \
{                                                                             \
    return this->template functor<                                            \
        BOOST_DEDUCED_TYPENAME base_::value_from_base>()                      \
    (                                                                         \
        const_cast                                                            \
        <                                                                     \
            BOOST_DEDUCED_TYPENAME BASE::base_type::value_type &              \
                                                                              \
        >( this->base().back() )                                              \
    );                                                                        \
}                                                                             \
                                                                              \
BOOST_DEDUCED_TYPENAME BASE::const_reference front() const                    \
{                                                                             \
    return this->template functor<                                            \
        BOOST_DEDUCED_TYPENAME BASE::value_from_base>()                       \
    (                                                                         \
        this->base().front()                                                  \
    );                                                                        \
}                                                                             \
                                                                              \
BOOST_DEDUCED_TYPENAME BASE::const_reference back() const                     \
{                                                                             \
    return this->template functor<                                            \
        BOOST_DEDUCED_TYPENAME BASE::value_from_base>()                       \
    (                                                                         \
        this->base().back()                                                   \
    );                                                                        \
}
/*===========================================================================*/


#endif // BOOST_BIMAP_DETAIL_MAP_VIEW_BASE_HPP