a possibility to redefine built-in GHCi commands

[Simon Marlow]

Peter Hercek wrote:
> Hi GHCi users,
> 
> I would like to be able to redefine the built-in GHCi commands. The idea 
> is that when searching for a command the user defined commands would be 
> searched first and only then the built-in commands would be searched. If 
>  user wants to invoke a built-in command regardless of user defined 
> commands he/she would need to start it with two colons (instead of one).
> 
> It is an user interface change which may break some scripts, but it 
> would allow to provide different default behavior.
> For example:
> * when I use GhciExt I want all my ":continue" commands to be actually 
> ":x :continue"
> * it would allow to specify different order of searching for abbreviated 
> commands as the default one
> * it would allow to specify different default switches for builtin commands
> 
> Would such a change be merged upstream if I would provide a patch?

Seems reasonable to me.

Cheers,
	Simon