Re: [Boost-users] [tuples, multi-index] tuples::get as key extractor

Igor R escribió:

Hello,

Consider the following types:

typedef tuple Item; typedef multi_index_container< Item, indexed_by< ordered_non_unique > >

...

...

Items;

The above types don't compile (MSVC10) because of &tuples::get<1>: C2440: 'specialization' : cannot convert from 'overloaded-function' to 'int (__cdecl *)(boost::tuples::tuple &)' It seems there're several overloaded function templates "tuples::get"...

So, what's the correct type of the appropriate function? Or -- is there a more "robust" way to extract the key (without defining explicit function-object)?

There can be a number of problems in trying to reference Boost.Tuple extractors directly. Have a look at http://lists.boost.org/boost-users/2005/12/16088.php for a discussion and a proposed solution (search for tuple_member_extractor at the bottom of the post). Joaquín M López Muñoz Telefónica, Investigación y Desarrollo