On 30 January 2018 at 14:48, Li-yao Xia
Hello libraries,
base contains a small combinator library for Read, but there doesn't seem to be a similar thing for Show. Offering a few more convenient helpers to avoid dealing with whitespace and especially precedence levels seems straightforward enough.
Is there an API somewhere that I missed? Has there been a proposal/discussion about this before? I'm ready to make one otherwise.
Have you looked at the ShowS-based methods? They tend to be a bit more combinator-y (though they don't cover whitespace). For example, here's the Show instance for Data.Graph.Inductive.Tree: instance (Show a, Show b) => Show (Gr a b) where showsPrec d g = showParen (d > 10) $ showString "mkGraph " . shows (labNodes g) . showString " " . shows (labEdges g)
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