example for recursive import

[Serge D. Mechveliani]

Concering adding an argument to a function intstead of using
recursive import, Christian Maeder wrote on  Jun 07, 2006 

> >I do not know. Will the source look natural?
> 
> That depends on g and h, a generalization can look natural or artifical.
> 
> >Can you explain this more precisely: what to change in  f, g, and h
> >?
> >Let it be  f, g, h  :: Int -> Int.
> 
> new situtation:
> 
> module F where
> import G
> import H
> 
> f :: Int -> Int
> 
> f x = ... g f (... x ...) ... h f (... x ...)
> 
> module G where
> 
> g :: (Int -> Int) -> Int -> Int
> 
> g f x = ...
> 
> module H ...
> 

Thank you for pointing at such possibility.
Still I think, such a program looks more natural when it uses 
recursive modules rather than adding extra arguments to functions.

Also this is not only for functions.
Instances often use each other in a recursive way:  
  module A where ... instance Foo1 Data1 where ...
  module B where ... instance Foo2 Data2 where ...
  module C where ... instance Foo3 Data3 where ...

-----------------
Serge Mechveliani
mechvel at botik.ru