dependingOn in 6.6

[John Meacham]

I was wondering if we could be sure to get

dependingOn :: a -> b -> a
dependingOn = ....

in ghc 6.6? this has been discussed before, it is implemented in jhc and
I have found all sorts of use for it as it can be used to control let
floating and inlining in a nice general way and is trivial to implement.
(one for ghc was posted before based on primitives it already
implements)

we just need to decide on a module to export it. 

the meaning is that 

x = ... `dependingOn` y

returns x with an artificial dependency on y. so things using x cannot
be floated out above where y is defined.


        John


-- 
John Meacham - ⑆repetae.net⑆john⑈