Igor R <boost.lists <at> gmail.com> writes:

Hello,

Is there a simple way to pass a modifier by reference/pointer in the following expression:

my_multi_index_container.modify(somePos, modifier);

"modifier" is a functor that has some internal state, so I wouldn't like it to be copied. Is it possible to do this without an explicit creation of a binder that binds operator() and &modifier (or so)?

The following should do: modifier_type modifier(...); ... my_multi_index_container.modify<modifier_type&>(somePos, modifier); HTH, Joaquín M López Muñoz Telefónica, Investigación y Desarrollo