Hi Joaquin, This is the exact error I am facing, When I insert like "sample.insert(&a);", I get errors like, . . . kytj.cpp ky_op_tj.cpp c:\code\common\lib\boost\boost\multi_index\hashed_index.hpp(1155) : error C2064: term does not evaluate to a function taking 2 arguments class does not define an 'operator()' or a user defined conversion operator to a pointer-to-function or reference-to-function that takes appropriate number of arguments c:\code\common\lib\\boost\boost\multi_index\hashed_index.hpp(1152) : while compiling class template member function 'bool boost::multi_index::detail::hashed_index::link_point(Container *const ,boost::multi_index::detail::hashed_index_base_node_impl<Allocator> *&,boost::multi_index::detail::hashed_unique_tag)' with [ KeyFromValue=boost::multi_index::const_mem_fun, Hash=boost::multi_index::const_mem_fun, Pred=boost::multi_index::const_mem_fun, SuperMeta=boost::multi_index::detail::nth_layer<1,Container *,boost::multi_index::indexed_by,boost::multi_index::const_mem_fun< DBObject,Vs64,DBObject::getKey2>,boost::multi_index::const_mem_fun>>,std::allocator>, TagList=boost::mpl::vector0boost::mpl::na, Category=boost::multi_index::detail::hashed_unique_tag, Allocator=std::allocator<char> ] c:\code\common\lib\boost\boost\multi_index_container.hpp(100) : see reference to class template instantiation 'boost::multi_index::detail:: hashed_index' being compiled with [ KeyFromValue=boost::multi_index::const_mem_fun, Hash=boost::multi_index::const_mem_fun, Pred=boost::multi_index::const_mem_fun, SuperMeta=boost::multi_index::detail::nth_layer<1,Container *,boost::multi_index::indexed_by,boost::multi_index::const_mem_fun< DBObject,Vs64,DBObject::getKey2>,boost::multi_index::const_mem_fun>>,std::allocator>, TagList=boost::mpl::vector0boost::mpl::na, Category=boost::multi_index::detail::hashed_unique_tag ] c:\code\common\src\biz\model\stm-stow_model\stm_container_manager_abc.h(300) : see reference to class template instantiation 'boost::multi_index::multi_ index_container' being compiled with [ Value=Container *, IndexSpecifierList=boost::multi_index::indexed_by,boost::multi_index:: const_mem_fun,boost:: multi_index::const_mem_fun>> ] xtyz.cpp . . . Build log was saved at "file://c:\code\win\Debug\obj\BuildLog.htm" ProjABC - 1 error(s), 0 warning(s) ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== Thanks, Ram On Mon, Sep 19, 2016 at 12:59 PM, Joaquin M López Muñoz < joaquinlopezmunoz@gmail.com> wrote:

El 19/09/2016 a las 7:54, Ram escribió:

Hi All ,

I have created a boost::multi_index container for my use and it compiles successfully. [...] The container I defined is ,

typedef boost::multi_index_ClassX< ClassX*, boost::multi_index::indexed_by< boost::multi_index::hashed_unique< boost::multi_index::const_mem_fun, boost::multi_index::const_mem_fun,

...

MultiIndexedClassX;

I'm afraid this is seriously wrong (leaving aside the translation typos such as "boost::multi_index_ClassX" instead of "boost::multi_index_container" etc.) The structure of a definition of a multi_index_container is

multi_index_container< element_type, indexed_by< index_specifier1<index1 args>, index_specifier2<index2 args>, ... >

...

where each index_specifier is one of "hashed_unique", "hashed_non_unique", "ordered_unique", etc. I assume your intention is to have *two* hashed indices (by key1 and key2, respectively), so rather than

indexed_by< hashed_unique

...

(which is what you've written), the definition has to follow this structure:

indexed_by< hashed_unique, hashed_unique

...

See the difference? Your original definition is just plain wrong, and the fact that it seems to compile is sheer luck (or lack of it): once you start trying to use it, compile-time errors will pop up. (if you're curious, Boost.MultiIndex is trying to use your second const_mem_fun as a hash function of the first const_mem_fun, which, of course, makes no sense, but this is what you instructed the lib to do).

I've written a small test program reproducing your scenario that you can play with at

http://coliru.stacked-crooked.com/a/456f8546e51a29e6

Note that, here, sample.insert(&a) works without problems.

Joaquín M López Muñoz

_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

Oops, I am wrong. I will try the suggestion you just gave, and the right way to write it and will try it out and let you know. Also please let me know how to extract value using specific keys. One more question, "Please don't top post, see http://www.boost.org/community /policy.html#quoting" I am not sure I understood that, please let me know what that means. Will go out for lunch now and come back and try it and let you know. Thanks a lot! -Ram On Mon, Sep 19, 2016 at 1:07 PM, Joaquin M López Muñoz < joaquinlopezmunoz@gmail.com> wrote:

El 19/09/2016 a las 9:32, Ram escribió:

...

Hi Joaquin,

This is the exact error I am facing, [...]

Please don't top post, see http://www.boost.org/community /policy.html#quoting

Please review my previous answer, apply the necessary changes and see if your error on insertion persists (which I hope will not).

Joaquín M López Muñoz _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

Sorry Joaquin, will do that from next time.. Corrected my code to, typedef boost::multi_index_container< ClassX*, //mapped value boost::multi_index::indexed_by //hashed index by unique key1

, boost::multi_index::hashed_unique< boost::multi_index::const_mem_fun //hashed index by unique key1 , boost::multi_index::hashed_unique< boost::multi_index::const_mem_fun //hashed index by unique key3/ID

ClassXMultiKeyIndexed;

ClassXMultiKeyIndexed sample; and tried compiling and I still get this while compiling(there are more errors below, but removed them), . . . kytj.cpp ky_op_tj.cpp c:\code\lib\boost\boost\multi_index\detail\node_type.hpp(43) : error C2825: 'boost::multi_index::detail::index_node_applier::apply< IndexSpecifierIterator,Super>::index_specifier': must be a class or namespace when followed by '::' with [ IndexSpecifierIterator=boost::mpl::v_iter>,boost:: multi_index::hashed_unique>,boost::multi_index:: hashed_unique>>,0>, Super=boost::multi_index::detail::hashed_index_node< boost::multi_index::detail::hashed_index_node>,boost::multi_index::detail::hashed_unique_tag>, boost::multi_index::detail::hashed_unique_tag>,boost:: multi_index::detail::hashed_unique_tag> ] c:\code\lib\boost\boost\mpl\aux_\preprocessed\plain\apply_wrap.hpp(49) : see reference to class template instantiation 'boost::multi_index::detail::index_node_applier::apply' being compiled with [ IndexSpecifierIterator=boost::mpl::v_iter>,boost:: multi_index::hashed_unique>,boost::multi_index:: hashed_unique>>,0>, Super=boost::multi_index::detail::hashed_index_node< boost::multi_index::detail::hashed_index_node>,boost::multi_index::detail::hashed_unique_tag>, boost::multi_index::detail::hashed_unique_tag>,boost:: multi_index::detail::hashed_unique_tag> ] c:\code\lib\boost\boost\mpl\aux_\preprocessed\plain\bind.hpp(207) : see reference to class template instantiation 'boost::mpl::apply_wrap2' being compiled with [ F=boost::multi_index::detail::index_node_applier, T1=boost::mpl::v_iter>,boost:: multi_index::hashed_unique>,boost::multi_index:: hashed_unique>>,0>, T2=boost::multi_index::detail::hashed_index_node>,boost::multi_index:: detail::hashed_unique_tag>,boost::multi_index::detail:: hashed_unique_tag>,boost::multi_index::detail::hashed_unique_tag> ] c:\code\lib\boost\boost\mpl\aux_\preprocessed\plain\apply_wrap.hpp(49) : see reference to class template instantiation 'boost::mpl::bind2::apply' being compiled with [ F=boost::multi_index::detail::index_node_applier, T1=boost::mpl::_2, T2=boost::mpl::_1, U1=boost::multi_index::detail::hashed_index_node>,boost::multi_index:: detail::hashed_unique_tag>,boost::multi_index::detail:: hashed_unique_tag>,boost::multi_index::detail::hashed_unique_tag>, U2=boost::mpl::v_iter>,boost:: multi_index::hashed_unique>,boost::multi_index:: hashed_unique>>,0> ] c:\code\lib\boost\boost\mpl\aux_\preprocessed\plain\apply.hpp(63) : see reference to class template instantiation 'boost::mpl::apply_wrap2' being compiled with [ F=boost::mpl::bind2, T1=boost::multi_index::detail::hashed_index_node

El 19/09/2016 a las 10:59, Ram escribió:

Sorry Joaquin, will do that from next time..

OK, when you do it I'll be happy to address your questions. In the meantime please understand it is not convenient for me or the community to follow up on an unproperly formatted thread like this. Joaquín M López Muñoz