Fractional precedences? Re: Operator precedence help

[Henning Thielemann]

On Sun, 16 Aug 2020, Carter Schonwald wrote:

> I do think that the work needed to actually support fractional 
> precedence in ghc is pretty minimal.  Or at least I remember having a 
> conversation about it a few years ago, and the conclusion was that 
>  adding precedence would be super easy to do, but just lacked any good 
> motivating example from real libraries. 

I remember this discussion, too, and I guess that it was started by Simon 
Marlow and it ended with recalling that decades ago something more 
advanced was discussed: Groups of equal precedence and relations between 
the groups. But that one was too complicated to be implemented.