Question

Im getting this really annoying error in when I run this Haskell code. For some reason it doesn’t like the fist line delLast :: (Ord a) => [a] -> [a]

delLast :: (Ord a) => [a] -> [a]
delLast [] = []
delLast (x:[]) = []
delLast (x:xs) = [x] ++ delLast xs

Doest anyone know why Im getting this error? Thanks.

This is the error that I get:

parse error on input `='
Failed, modules loaded: none.

Answer 1

Is there an unterminated definition immediately before that line?

x = do

delLast :: (Ord a) => [a] -> [a]
delLast [] = []
delLast (x:[]) = []
delLast (x:xs) = [x] ++ delLast xs

Compiling that gives me:

test.hs:5:12: parse error on input `='