Now you have 3 different states that all represent an error:
(null, new DivideByZeroException())
(null, null)
(result, new DivideByZeroException())
One of which does not actually use our custom error type, and one of which contains a value for some reason. Our function is simple division! Are there really 3 different ways division can fail?
This isn't a showstopper, it's just more stuff you have to keep in your head.
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Now you have 3 different states that all represent an error:
One of which does not actually use our custom error type, and one of which contains a value for some reason. Our function is simple division! Are there really 3 different ways division can fail?This isn't a showstopper, it's just more stuff you have to keep in your head.