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Need to implement Semigroup apart from Monoid for base >= 4.9 as in the example below:
#if MIN_VERSION_base(4,9,0) instance Semigroup ByteString where (<>) = append #endif
The text was updated successfully, but these errors were encountered:
See migration guide for GHC 8.0:
https://ghc.haskell.org/trac/ghc/wiki/Migration/8.0
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Need to implement Semigroup apart from Monoid for base >= 4.9 as in the example below:
The text was updated successfully, but these errors were encountered: