So the sort of stuff I've been using this in is encryption/decryption, where there's a whole boatload of things you have to set up, read/create OIDs, configure

So the sort of stuff I've been using this in is encryption/decryption, where there's a whole boatload of things you have to set up, read/create OIDs, configure identities, fetch certificates, match algorithms, etc. etc. All of that has to be ok before you finally get to the bit that does the work, and since I'm using ObjC with its ARC feature, I don't need to deallocate anything, they'll be deallocated as they go out of scope. I tend to release critical RAII stuff in my -dealloc method anyway if there's anything there to be done. So it's really a whole long list of id result = nil; do { if (setup-X-fails) break if (setup-Y-fails) break ... result = call_method(X,Y,Z,A,...F) } while (0); ... which works out pretty well, and is very readable. The setup-xxx stuff can be several pages of code for each method - and useful in their own right, so integrating it into the loop doesn't seem preferable.