On Sun, 12 Dec 2004 13:08:30 -0500, Jason Bailey
So in the wiki on AbstractDataType ( http://haskell.org/hawiki/AbstractDataType )
it gives the following example:
data Tree a = Nil | Node { left :: Tree a, value :: a, right :: Tree a }
The part where I am confused is with the use of '{' and '}' my reference book is apparently out of date as it states that Haskell doesn't even use those characters :)
Could someone point me to some documentation on whats being created here and how its used?
It's basically a shorthand for writing accessor functions. You could do something like: data Tree a = Nil | Node (Tree a) a (Tree a) left (Node l _ _) = l value (Node _ v _) = v right (Node _ _ r) = r /S -- Sebastian Sylvan +46(0)736-818655 UIN: 44640862