Integrating editline with ghc

[Manuel M T Chakravarty]

Christian Maeder:
> Judah Jacobson wrote:
>> - System.Console.Editline.Readline contains the readline APIs  
>> provided
>> by the editline library (mostly a cut/paste of
>> System.Console.Readline).
>
> I would like to see a restructuring of the old readline
> package:
>
> 1. a _new_ readline package that only contains the interface that  
> can be
> implemented using libeditline _or_ libreadline. If this package is  
> call
> "readline" (with a new version number) most libraries i.e. like  
> Shellac
> would not need modifications.

I disagree.  Readline should stay as it is.  (Why force existing  
readline users who use functionality not supported by editline's  
emulation layer to change the package they are using?)

Instead, we should have a new module whose interface coincides with  
editline's readline emulation.  Everybody who wants to use editline  
when available and readline only if editline is not available can then  
use that new module (which I called EditReadline in my previous  
post).  GHC will be one of these programs.

Manuel