[Haskell-beginners] Help with a data type declaration

[emacstheviking]

a = left b = right

That would at least make the sentiment clearer.



On 29 September 2015 at 15:10, <jamb at hinojosa.com> wrote:

> How can I interpret the following data type declaration? The book where I
> am studying (and other sources I have read as well) only show more simple
> examples. This is what I can say about it:
>
> * "Tree" is the name of the new type.
> * "Branch" and "Leaf" are the type constructors.
> * What is "a" and "b"?
> * It seems to me that this type is kind of "recursively" defined but I do
> not know exactly.
>
>
> data Tree a b = Branch b (Tree a b) (Tree a b)
>               | Leaf a
>
> I will very much appreciate your feedback.
>
> Regards,
> JAMB
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