[Haskell-cafe] Why does Haskell have the if-then-else syntax?

[Doaitse Swierstra]

On Jul 28, 2006, at 4:07 PM, Robert Dockins wrote:

>
> On an almost completely unrelated note, I've sometimes thought that  
> it would be nice to be able to have the compiler auto-magicly  
> generate catamorphisms for datatypes upon request.  No, I haven't  
> thought out the details.

For the time being you may resort to our attribute grammar system,  
which basically generates such catamorphisms 9and matches nicely with  
our parser combinators too):

http://www.cs.uu.nl/wiki/HUT/AttributeGrammarSystem

  Doaitse Swierstra