You need some keyword that triggers Haskell's layout syntax. You end the multiline mode with an empty line. In your example you would need the "let" keyword. Prelude> :set +m Prelude> let square :: Num a => a -> a Prelude| square x = x * x Prelude| Prelude> square 3 9 On 16.08.2018 11:22, Fabien R wrote:
I thought I could use the directive ":set +m" to define a function with its signature.
Prelude> :set +m Prelude> square :: Num a=>a->a
<interactive>:3:1: error: Variable not in scope: square :: a1 -> a1
Instead, I have to type:
Prelude> :unset +m Prelude> :{ Prelude| square :: Num a=>a->a Prelude| square = (^2) Prelude| :} Prelude>
Any hint ?
-- Fabien _______________________________________________ Haskell-Cafe mailing list To (un)subscribe, modify options or view archives go to: http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe Only members subscribed via the mailman list are allowed to post.
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