Re: [Haskell-beginners] cascade of if statements

31 Oct 2012


      On Wed, Oct 31, 2012 at 06:14:52PM +0100, Daniel Trstenjak wrote:
...
(<&&>) :: Monad m => m Bool -> m Bool -> m Bool
(<&&>) m1 m2 = do
   r1 <- m1
   if r1 then m2 else return False
(<||>) :: Monad m => m Bool -> m Bool -> m Bool
(<||>) m1 m2 = do
   r1 <- m1
   if r1 then return True else m2
That the operators behave like the boolean ones we should have the same fixity declarations:

infixr 3 (<&&>)
infixr 2 (<||>)


Greetings,
Daniel