Smart Pointer Map Lookup

[nuzzle]

This code cause run time error map iterator not deference able.

If it's a runtime error you're probably manipulating the map (restructuring it by making insertions or deletions) while you're iterating it. That's a big no-no.

When it comes to the behaviour of smart pointers (boost::shared_ptr) related to "bald" pointers - they're very close to totally identical in my view. I often amaze at this. Any difference is caught at compile time in my experience.