I'm quiet new to boost and especially multi_index. I want to get a non-constant reference to elements I inserted into this container, but when dereferencing the iterator all I get is a const reference. What am I doing wrong? Please have a look at the attached example.

You can update elements by means of member functions: replace(), modify(), modify_key() http://www.boost.org/doc/libs/1_37_0/libs/multi_index/doc/tutorial/basics.ht...