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I’d like the destructor of my class to delete the entire object except for one of the members, which is deleted elsewhere. First of all, is this totally unreasonable? Assuming it’s not, how do I do this? I thought that created an destructor with an empty body would prevent all the members from being deleted (because the destructor wouldn’t do anything), but that doesn’t seem to be the case.
Short answer: You don’t.
Longer answer: If the “member” is actually a pointer to some other allocation, you can arrange to not delete the other allocation.
But usually, if you allocated the other block in the constructor, you want to delete it in the destructor. Anything else will require careful handling of the “ownership” of the block in question. It will be a lot like memory management in plain c. Possible, but fraught with danger.
Good luck.