Saying "I prefer purity to fighting with the borrow checker" doesn't make sense. Pure code is guaranteed to pass the borrow check!
@pcwalton Actually, I had the same thought yesterday: It's easier to avoid mutable state even when it would be otherwise better/cleaner.
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@pcwalton But, today I found that I just needed to s/&'a mut Reader/&mut Reader<'a>/ and all my trouble was fixed. But it cost me hours.Thanks. Twitter will use this to make your timeline better. UndoUndo
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