[Haskell] implicit responses/values

[S. Alexander Jacobson]

I am now using implicit parameters quite happily.  But I also feel the 
need for the reverse.  There are occasions where I want to pass a 
value back through the set of calling functions e.g. produce HTTP 
cache header info through functions that are not really about that.

I am not sure how this would work, but it strikes me as useful.
Anything like that in the offing?

-Alex-

______________________________________________________________
S. Alexander Jacobson tel:917-770-6565 http://alexjacobson.com