Re[2]: [Haskell-cafe] Why do I have to specify (Monad m) here again?

Hello Marc, Sunday, February 18, 2007, 8:05:24 PM, you wrote:

Is there a difference at all wehter specifying (Monad m) in the class declaration or not? I have to add it to the instance declaration anyway.. And if you don't want to change the meaning of instance declaration you would be able to add this constraint to indicate this.

I don't see why it simplifies error messages.

i mean that it makes error message more obvious - you don't need to remember that this context is implied due to class declaration -- Best regards, Bulat mailto:Bulat.Ziganshin@gmail.com