What is the meaning of `!` in a `data` declaration

Asked Jul 17 '12 at 19:21

Active Jul 17 '12 at 19:23

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Possible Duplicate:
What does the exclamation mark mean in a Haskell declaration?

What is the difference between

data Tree a = Leaf | Bin a !(Tree a) !(Tree a)

and

data Tree a = Leaf | Bin a (Tree a) (Tree a)

edited May 23 '17 at 12:12

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asked Jul 17 '12 at 19:21

Michael Litchard

5

http://stackoverflow.com/questions/993112/what-does-the-exclamation-mark-mean-in-a-haskell-declaration – John Jul 17 '12 at 19:23

0 Answers0