[acc-errors] Accumulate errors for Seq and Vector parsers #600
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phadej
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Oct 29, 2017
Data/Aeson/Types/Internal.hs
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| accumulateTraverseVector :: (a -> Parser b) -> Vector a -> Parser (Vector b) | ||
| accumulateTraverseVector f v = | ||
| if V.null v |
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I wonder, if it makes sense to define
newtype AccParser a = AccParser { runAccParser :: Parser a }
instance Applicative AccParser where
AccParser f <*> AccParser x = AccParser (f <*>+ x) -- !!!and use it, and not re-implement traverse for everything.
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I agree, it's a good idea to use Traversable here. Reexporting Parser versions that use AccParser under the hood is nice too.
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I'm not sure when I'll get around to playing more with this, so feel free to steal the commit if anyone wants to keep going before I get the chance. |
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I changed this to use an |
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Naming has room for improvements, maybe we should even have a module for accumulation related functions, or should we do this in some other way like using a newtype so we can have proper traversable instances (not sure if that'll work out)?
Ping @Lysxia