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recursive do: fix justOnes type and GHC link (#141)

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Chris Martin 2016-11-06 15:05:31 -08:00 committed by Stephen Diehl
parent 50389a702a
commit 6f68cbbe80
1 changed files with 2 additions and 2 deletions
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tutorial.md
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@ -2776,13 +2776,13 @@ of a monadic context that need to hold a reference to themselves.
```haskell
{-# LANGUAGE RecursiveDo #-}
justOnes :: [Int]
justOnes :: Maybe [Int]
justOnes = do
rec xs <- Just (1:xs)
return (map negate xs)
```
See: [Recursive Do Notation](https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/syntax-extns.html#recursive-do-notation)
See: [Recursive Do Notation](https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/glasgow_exts.html#the-recursive-do-notation)
Applicative Do
--------------