207 lines
5.0 KiB
C++
207 lines
5.0 KiB
C++
// Boost.Bimap
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//
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// Copyright (c) 2006-2007 Matias Capeletto
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//
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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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/// \file set_of.hpp
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/// \brief Include support for set constrains for the bimap container
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#ifndef BOOST_BIMAP_SET_OF_HPP
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#define BOOST_BIMAP_SET_OF_HPP
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#if defined(_MSC_VER)
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#pragma once
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#endif
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#include <boost/config.hpp>
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#include <boost/bimap/detail/user_interface_config.hpp>
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#include <functional>
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#include <boost/mpl/bool.hpp>
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#include <boost/mpl/aux_/na.hpp>
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#include <boost/concept_check.hpp>
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#include <boost/bimap/detail/concept_tags.hpp>
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#include <boost/bimap/detail/generate_index_binder.hpp>
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#include <boost/bimap/detail/generate_view_binder.hpp>
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#include <boost/bimap/detail/generate_relation_binder.hpp>
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#include <boost/bimap/tags/support/value_type_of.hpp>
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#include <boost/multi_index/ordered_index.hpp>
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#include <boost/bimap/views/map_view.hpp>
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#include <boost/bimap/views/set_view.hpp>
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namespace boost {
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namespace bimaps {
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/// \brief Set Type Specification
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/**
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This struct is used to specify a set specification.
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It is not a container, it is just a metaprogramming facility to
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express the type of a set. Generally, this specification will
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be used in other place to create a container.
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It has the same syntax that an std::set instantiation, except
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that the allocator cannot be specified. The rationale behind
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this difference is that the allocator is not part of the set
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type specification, rather it is a container configuration
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parameter.
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The first parameter is the type of the objects in the set, and
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the second one is a Functor that compares them.
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Bimap binding metafunctions can be used with this class in
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the following way:
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\code
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using namespace support;
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BOOST_STATIC_ASSERT( is_set_type_of< set_of<Type> >::value )
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BOOST_STATIC_ASSERT
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(
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is_same
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<
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set_of<Type,KeyCompare>::index_bind
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<
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KeyExtractor,
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Tag
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>::type,
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ordered_unique< tag<Tag>, KeyExtractor, KeyCompare >
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>::value
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)
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typedef bimap
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<
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set_of<Type>, RightKeyType
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> bimap_with_left_type_as_set;
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BOOST_STATIC_ASSERT
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(
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is_same
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<
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set_of<Type>::map_view_bind
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<
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member_at::left,
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bimap_with_left_type_as_set
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>::type,
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map_view< member_at::left, bimap_with_left_type_as_set >
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>::value
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)
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\endcode
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See also set_of_relation.
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**/
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template
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<
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class KeyType,
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class KeyCompare = std::less< BOOST_DEDUCED_TYPENAME
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::boost::bimaps::tags::support::value_type_of<KeyType>::type >
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>
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struct set_of : public ::boost::bimaps::detail::set_type_of_tag
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{
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/// User type, can be tagged
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typedef KeyType user_type;
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/// Type of the object that will be stored in the set
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typedef BOOST_DEDUCED_TYPENAME ::boost::bimaps::tags::support::
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value_type_of<user_type>::type value_type;
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/// Functor that compare two keys
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typedef KeyCompare key_compare;
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struct lazy_concept_checked
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{
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BOOST_CLASS_REQUIRE ( value_type,
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boost, AssignableConcept );
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BOOST_CLASS_REQUIRE4( key_compare, bool, value_type, value_type,
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boost, BinaryFunctionConcept );
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typedef set_of type;
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};
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BOOST_BIMAP_GENERATE_INDEX_BINDER_1CP(
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// binds to
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multi_index::ordered_unique,
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// with
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key_compare
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)
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BOOST_BIMAP_GENERATE_MAP_VIEW_BINDER(
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// binds to
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views::map_view
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)
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BOOST_BIMAP_GENERATE_SET_VIEW_BINDER(
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// binds to
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views::set_view
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)
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typedef mpl::bool_<false> mutable_key;
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};
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/// \brief Set Of Relation Specification
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/**
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This struct is similar to set_of but it is bind logically to a
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relation. It is used in the bimap instantiation to specify the
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desired type of the main view. This struct implements internally
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a metafunction named bind_to that manages the quite complicated
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task of finding the right type of the set for the relation.
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\code
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template<class Relation>
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struct bind_to
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{
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typedef -unspecified- type;
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};
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\endcode
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See also set_of, is_set_type_of_relation.
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**/
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template< class KeyCompare = std::less< _relation > >
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struct set_of_relation : public ::boost::bimaps::detail::set_type_of_relation_tag
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{
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/// Functor that compare two keys
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typedef KeyCompare key_compare;
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BOOST_BIMAP_GENERATE_RELATION_BINDER_1CP(
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// binds to
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set_of,
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// with
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key_compare
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)
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typedef mpl::bool_<false> left_mutable_key;
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typedef mpl::bool_<false> right_mutable_key;
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};
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} // namespace bimaps
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} // namespace boost
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#endif // BOOST_BIMAP_SET_OF_HPP
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