I assumed you meant any sort of named binding. I agree mutability makes code harder to reason about, but I feel like that’s one of the less likely reasons for this mistake.
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I’m confused. Nothing about that seems to prevent you from logging an immutable bound variable without thinking about what it might contain.
It logs zipper operations to a writer monad. You can make it IO bound if you really want (you don't though).
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I think you usually want logs to be eventually stored somewhere...
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You don't actually, but that's beside the point.
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