Refactor ArgsCheckState to use a single list of CheckedArg #7519
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Previously, there were three lists which supposedly were of the same length. Using a single list of `CheckedArg`enforces this constraint and makes the code conceptually simpler.
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Previously, there were three lists which supposedly were of the same length.
Using a single list of
CheckedArgenforces this constraint and makes the code conceptually simpler.Control.Monad.Except.withErrorneeds to be vendored as it is only available frommtl-2.3.1:withErrorlacks a@sinceannotation haskell/mtl#156