Monday, September 12, 2011

DIY auto_ptr -- NittyGrittyC++

P200 [[NittyGrittyC++]] shows that you can create your own wrapper class to ensure a local heap-allocated object always, always gets deallocated when the variable goes out of scope, even if exceptionally.

Once you wrap your local heap variable into this wrapper object, you can effectively forget deallocation. Just make sure you don't deallocate manually.

Then you realize -- This is a partial auto_ptr, but it's actually better to forget about auto_ptr at this point. Auto_ptr has too many other features. Here we are only interested in the RAII dtor.

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