The Pretty class (from Text.PrettyPrint.HughesPJClass) uses Rational.
On Mon, Aug 17, 2020 at 9:12 AM Carter Schonwald
Oh yeah! I feel like everyone’s wondered about that approach. But it definitely would need some experiments to validate. But in some ways it’d be super fascinating.
On Mon, Aug 17, 2020 at 9:40 AM Henning Thielemann < lemming@henning-thielemann.de> wrote:
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.
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