c++ - How to avoid shared_ptr ambiguity? (stl vs boost)

I've used stl's shared_ptr many places in my code and I have used the following using statement anywhere that I have used shared_ptr:

using namespace std::tr1;

Now I need to use boost::bimap. So I have to include the following header file in my code:

#include 

As soon as I include the bimap header file, the shared_ptr type becomes ambiguous, and I have to change all usages of shared_ptr to std::tr1::shared_ptr. Since this makes my code ugly, I am looking for a way to avoid this ambiguity without needing to declare shared_ptr everywhere with a fully qualified name. I was thinking of using typedef for std::tr1::shared_ptr, but maybe there are better ways too. Any advice would be appreciated!

Answer

simply do not introduce it. avoid the general using namespace ...