When to use custom exceptions vs. existing exceptions vs. generic exceptions

Question

I\'m trying to figure out what the correct form of exceptions to throw would be for a library I am writing. One example of what I need to handle is logging a user in to a st

Answer 1

You can nearly never go wrong by having fine-grained exception classes that extend a common base class. That way, callers who need to specifically catch some and let others through can, and callers who want to treat them all together can do so.