[Boost-users] Boost::multiIndex container problems

From: Phantom (rob_at_[hidden])
Date: 2005-08-29 12:59:10

Hi,

I'm trying to use the boost::multi_index_container to index a struct based 
on a enum and a std::string.
While I can retrive data from the container by search on the string any 
attempts to such on the enum results in a compliation error.
Anyone got any ideas as to what I need todo to get this to work :)

The compiler is MSVC++7.1
Any Help would be appricated :)

Relivaent code and errors follow:
:
namespace mi = boost::multi_index;

struct FilterCreatorDetails
    {
        FilterCreatorDetails(FileTypes id, std::string key, filtercreator 
creator) : id_(id), key_(key), creator_(creator)
        {
        }
        FilterCreatorDetails(FilterCreatorDetails const &lhs) : 
id_(lhs.id_), key_(lhs.key_), creator_(lhs.creator_)
        {
        }
        std::string key_;
        FileTypes id_;
        filtercreator creator_;

        bool operator<(FilterCreatorDetails const &lhs) const
        {
            return id_ < lhs.id_;
        };
    };

    struct key{};
    struct id{};

typedef mi::multi_index_container<
            FilterCreatorDetails,
            mi::indexed_by<
            mi::ordered_unique< mi::tag<id> , 
mi::identity<FilterCreatorDetails> >,   // orders by operator <
                mi::ordered_non_unique <mi::tag<key> , 
mi::member<FilterCreatorDetails,std::string, &FilterCreatorDetails::key_> >
            >
        > texmap_t;

// code below doesnt work, causes errors on compile when i try to use the 
'find' function
    filtercreator FilterRegister::getCreator(FileTypes val)
    {
        typedef texmap_t::index<id>::type tex_by_id;
        tex_by_id::iterator it = texturefilters->get<id>().find(val);
        return (*it).creator_;
        return filtercreator();
    }

// this function works however...

filtercreator FilterRegister::getCreator(std::string const &val)
    {
        typedef texmap_t::index<key>::type tex_by_name;

        tex_by_name::iterator it = texturefilters->get<key>().find(val);

        /*texmap_t::const_iterator val = texturefilters->find(key);*/
        return (*it).creator_;
    }

// The short errors :
g:\Boost\include\boost-1_33\boost\multi_index\detail\ord_index_ops.hpp(72): 
error C2664: 'bool std::less<_Ty>::operator ()(const _Ty &,const _Ty &) 
const' : cannot convert parameter 1 from 'const 
GameTextureLoader::FileTypes' to 'const 
boost::multi_index::detail::non_const_identity_base<Type>::result_type &'
        with
        [
            _Ty=boost::multi_index::detail::non_const_identity_base<GameTextureLoader::FilterCreatorDetails>::result_type
        ]
        and
        [
            Type=GameTextureLoader::FilterCreatorDetails
        ]
g:\Boost\include\boost-1_33\boost\multi_index\detail\ord_index_ops.hpp(65): 
error C2664: 'bool std::less<_Ty>::operator ()(const _Ty &,const _Ty &) 
const' : cannot convert parameter 2 from 'const 
GameTextureLoader::FileTypes' to 'const 
boost::multi_index::detail::non_const_identity_base<Type>::result_type &'
        with
        [
            _Ty=boost::multi_index::detail::non_const_identity_base<GameTextureLoader::FilterCreatorDetails>::result_type
        ]
        and
        [
            Type=GameTextureLoader::FilterCreatorDetails
        ]

// the long rambling build log errors
------ Build started: Project: Game Texture Loader, Configuration: Debug 
Win32 ------

Compiling...
GTL_internal.cpp
g:\Boost\include\boost-1_33\boost\multi_index\detail\ord_index_ops.hpp(65) : 
error C2664: 'bool std::less<_Ty>::operator ()(const _Ty &,const _Ty &) 
const' : cannot convert parameter 2 from 'const 
GameTextureLoader::FileTypes' to 'const 
boost::multi_index::detail::non_const_identity_base<Type>::result_type &'
        with
        [
            _Ty=boost::multi_index::detail::non_const_identity_base<GameTextureLoader::FilterCreatorDetails>::result_type
        ]
        and
        [
            Type=GameTextureLoader::FilterCreatorDetails
        ]
        Reason: cannot convert from 'const GameTextureLoader::FileTypes' to 
'const 
boost::multi_index::detail::non_const_identity_base<Type>::result_type'
        with
        [
            Type=GameTextureLoader::FilterCreatorDetails
        ]
        No constructor could take the source type, or constructor overload 
resolution was ambiguous
        g:\Boost\include\boost-1_33\boost\multi_index\ordered_index.hpp(383) 
: see reference to function template instantiation 'Node 
*boost::multi_index::detail::ordered_index_find<boost::multi_index::detail::ordered_index<KeyFromValue,Compare,SuperMeta,TagList,Category>::node_type,boost::multi_index::detail::ordered_index<KeyFromValue,Compare,SuperMeta,TagList,Category>::key_from_value,CompatibleKey,boost::multi_index::detail::ordered_index<KeyFromValue,Compare,SuperMeta,TagList,Category>::key_compare>(Node 
*,const KeyFromValue &,const CompatibleKey &,const CompatibleCompare &)' 
being compiled
        with
        [
            Node=boost::multi_index::detail::ordered_index<boost::multi_index::ordered_unique<boost::multi_index::tag<GameTextureLoader::id>,boost::multi_index::identity<GameTextureLoader::FilterCreatorDetails>>::key_from_value_type,boost::multi_index::ordered_unique<boost::multi_index::tag<GameTextureLoader::id>,boost::multi_index::identity<GameTextureLoader::FilterCreatorDetails>>::compare_type,boost::multi_index::detail::nth_layer<1,GameTextureLoader::FilterCreatorDetails,boost::multi_index::indexed_by<boost::multi_index::ordered_unique<boost::multi_index::tag<GameTextureLoader::id>,boost::multi_index::identity<GameTextureLoader::FilterCreatorDetails>>,boost::multi_index::ordered_non_unique<boost::multi_index::tag<GameTextureLoader::key>,boost::multi_index::member<GameTextureLoader::FilterCreatorDetails,std::string,pointer-to-member(0x0)>>>,std::allocator<GameTextureLoader::FilterCreatorDetails>>,boost::multi_index::ordered_unique<boost::multi_index::tag<GameTextureLoader::id>,boost::multi_index::identity
<GameTextureLoader::FilterCreatorDetails>>::tag_list_type,boost::multi_index::detail::ordered_unique_tag>::node_type,
            KeyFromValue=boost::multi_index::ordered_unique<boost::multi_index::tag<GameTextureLoader::id>,boost::multi_index::identity<GameTextureLoader::FilterCreatorDetails>>::key_from_value_type,
            Compare=boost::multi_index::ordered_unique<boost::multi_index::tag<Ga
meTextureLoader::id>,boost::multi_index::identity<GameTextureLoader::FilterCreatorDetails>>::compare_type,
            SuperMeta=boost::multi_index::detail::nth_layer<1,GameTextureLoader::FilterCreatorDetails,boost::multi_index::indexed_by<boost::multi_index::ordered_unique<boost::multi_index::tag<GameTextureLoader::id>,boost::multi_index::identity<GameTextureLoader::FilterCreatorDetails>>,boost::multi_index::ordered_non_unique<boost::multi_index::tag<GameTextureLoader::key>,boost::multi_index::member<GameTextureLoader::FilterCreatorDetails,std::string,pointer-to-member(0x0)>>>,std::allocator<GameTextureLoader::FilterCreatorDetails>>,
            TagList=boost::multi_index::ordered_unique<boost::multi_index::tag<GameTextureLoader::id>,boost::multi_index::identity<GameTextureLoader::FilterCreatorDetails>>::tag_list_type,
            Category=boost::multi_index::detail::ordered_unique_tag,
            CompatibleKey=GameTextureLoader::FileTypes,
            CompatibleCompare=boost::multi_index::detail::ordered_index<boost::multi_index::ordered_unique<boost::multi_index::tag<GameTextureLoader::id>,boost::multi_index::identity<GameTextureLoader::FilterCreatorDetails>>::key_from_value_type,boost::multi_index::ordered_unique<boost::multi_index::tag<GameTextureLoader::id>,boost::multi_index::identity<GameTextureLoader::FilterCreatorDetails>>::compare_type,boost::multi_index::detail::nth_layer<1,GameTextureLoader::FilterCreatorDetails,boost::multi_index::indexed_by<boost::multi_index::ordered_unique<boost::multi_index::tag<GameTextureLoader::id>,boost::multi_index::identity<GameTextureLoader::FilterCreatorDetails>>,boost::multi_index::ordered_non_unique<boost::multi_index::tag<GameTextureLoader::key>,boost::multi_index::member<GameTextureLoader::FilterCreatorDetails,std::string,pointer-to-member(0x0)>>>,std::allocator<GameTextureLoader::FilterCreatorDetails>>,boost::multi_index::ordered_unique<boost::multi_index::tag<GameTextureLoader::id>,boost::multi_in
dex::identity<GameTextureLoader::FilterCreatorDetails>>::tag_list_ty
pe,boost::multi_index::detail::ordered_unique_tag>::key_compare
        ]
        d:\My Documents\Visual Studio Projects\Game Texture 
Loader\GTL_internal.cpp(46) : see reference to function template 
instantiation 
'boost::multi_index::detail::ordered_index<KeyFromValue,Compare,SuperMeta,TagList,Category>::iterator 
boost::multi_index::detail::ordered_index<KeyFromValue,Compare,SuperMeta,TagList,Category>::find<GameTextureLoader::FileTypes>(const 
CompatibleKey &) const' being compiled
        with
        [
            KeyFromValue=boost::multi_index::ordered_unique<boost::multi_index::tag<GameTextureLoader::id>,boost::multi_index::identity<GameTextureLoader::FilterCreatorDetails>>::key_from_value_type,
            Compare=boost::multi_index::ordered_unique<boost::multi_index::tag<GameTextureLoader::id>,boost::multi_index::identity<GameTextureLoader::FilterCreatorDetails>>::compare_type,
            SuperMeta=boost::multi_index::detail::nth_layer<1,GameTextureLoader::FilterCreatorDetails,boost::multi_index::indexed_by<boost::multi_index::ordered_unique<boost::multi_index::tag<GameTextureLoader::id>,boost::multi_index::identity<GameTextureLoader::FilterCreatorDetails>>,boost::multi_index::ordered_non_unique<boost::multi_index::tag<GameTextureLoader::key>,boost::multi_index::member<GameTextureLoader::FilterCreatorDetails,std::string,pointer-to-member(0x0)>>>,std::allocator<GameTextureLoader::FilterCreatorDetails>>,
            TagList=boost::multi_index::ordered_unique<boost::multi_index::tag<GameTextureLoader::id>,boost::multi_index::identity<GameTextureLoader::FilterCreatorDetails>>::tag_list_type,
            Category=boost::multi_index::detail::ordered_unique_tag,
            CompatibleKey=GameTextureLoader::FileTypes
        ]
g:\Boost\include\boost-1_33\boost\multi_index\detail\ord_index_ops.hpp(72) : 
error C2664: 'bool std::less<_Ty>::operator ()(const _Ty &,const _Ty &) 
const' : cannot convert parameter 1 from 'const 
GameTextureLoader::FileTypes' to 'const 
boost::multi_index::detail::non_const_identity_base<Type>::result_type &'
        with
        [
            _Ty=boost::multi_index::detail::non_const_identity_base<GameTextureLoader::FilterCreatorDetails>::result_type
        ]
        and
        [
            Type=GameTextureLoader::FilterCreatorDetails
        ]
        Reason: cannot convert from 'const GameTextureLoader::FileTypes' to 
'const 
boost::multi_index::detail::non_const_identity_base<Type>::result_type'
        with
        [
            Type=GameTextureLoader::FilterCreatorDetails
        ]
        No constructor could take the source type, or constructor overload 
resolution was ambiguous

Build Time 0:07
Build log was saved at "file://d:\My Documents\Visual Studio Projects\Game 
Texture Loader\Debug\BuildLog.htm"
Game Texture Loader - 2 error(s), 0 warning(s)

------ Build started: Project: GTLTester, Configuration: Debug Win32 ------

GTLTester - up-to-date.
Build Time 0:00

---------------------- Done ----------------------

    Build: 1 succeeded, 1 failed, 0 skipped