Re: [Haskell-cafe] Equality constraints in type families

Am Donnerstag, 27. März 2008 23:12 schrieben Sie:

The reason for the braces in type families is because type indices are treated differently than normal parameters. I don't think this should be adopted for type synonyms either.

Cheers, hugo

In a way, there is also different treatment in the case of type synonyms. If you have the definition type ReaderWriterT m = ReaderT (WriterT m), you cannot leave out the m but you can leave out the result type parameter. I think, it would be good if the syntax of type synonyms and type synonym families was consistent. Best wishes, Wolfgang