Difference between revisions of "Implicit parameters"
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| − | The GHC manual on implicit parameters: [ |
+ | The GHC manual on implicit parameters: [https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/glasgow_exts.html#implicit-parameters]. |
Working example: |
Working example: |
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Revision as of 14:03, 9 July 2016
The GHC manual on implicit parameters: [1].
Working example:
{-# LANGUAGE ImplicitParams #-}
import Data.List (sortBy)
sort :: (?cmp :: a -> a -> Ordering) => [a] -> [a]
sort = sortBy ?cmp
main = let ?cmp = compare in putStrLn (show (sort [3,1,2]))