Dependency injection in C++

Question

This is also a question that I asked in a comment in one of Miško Hevery\'s google talks that was dealing with dependency injection but it got buried in the comments.

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Answer 1

Use RAII.

Handing a raw pointer to someone is the same as handing them ownership. If that's not what you want to do, you should give them some kind of facade that also knows how to clean up the object in question.

shared_ptr<> can do this; the second argument of its constructor can be a function object that knows how to delete the object.