@cawhitworth fail is bad form *iff* you can't control what monad it's being called in. It's fine for Maybe and for Either fr.ex.
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@cawhitworth i.e. I dislike that fail always takes a string, even if you might have a better more semantically useful way to report it.
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@cawhitworth Mostly I write such code in the (Either MyErrorKind) monad; 'fail' in that context is simply 'Left'. Not pretty, but works.
Jul 3, 2014 ยท 9:47 AM UTC