[Haskell-beginners] factorial question

[Brandon Allbery]

On Fri, Aug 31, 2012 at 12:23 PM, KMandPJLynch <kmandpjlynch at verizon.net>wrote:

> *factorial'      :: Int -> Int*
> *factorial'  0    = 1*
> *factorial' (n+1) = (n+1)*factorial' n*
>

n+k patterns were removed from Haskell 2010.  You can re-enable them in GHC
with

{-# LANGUAGE NPlusKPatterns #-}

or

{-# LANGUAGE Haskell98 #-}

as the first line of the source file.

-- 
brandon s allbery                                      allbery.b at gmail.com
wandering unix systems administrator (available)     (412) 475-9364 vm/sms
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