[Boost-users] Boost.Multiindex namespace problem

Hello I m using boost 1.35 and g++ v4.1.3 20070929 (Ubuntu 4.1.2-16ubuntu2) on ubuntu gutsy, I have a problem when using multindex namespaces. This compiles without problem : (this is in a class) using namespace boost::multi_index ; class myClass { public: struct foo { public: int getLocalDataId() ; } ; typedef hashed_unique > myIndex ; }; But the same code without the prefix "boost::multi_index" doesnt compile : typedef hashed_unique > myIndex ; I can obviously add the namespace before mem_fun, I just wonder why this compile error occurs. Thanks in advance.