Re: Remove Enum from Float and Double

Johan Tibell writes:

If we truly believe that the instance is dangerous for users (and not merely for people who don't understand floating point arithmetic on computers), then we should add a deprecation pragma to the instance and discourage its use. But what would the deprecation message encourage instead, for users to write an explicit loop that tests against some lower/upper bound? It would have the same problem as enumFromTo. I think the issue here is really that floating point math on computers is hard to think about.

The issue is that these instances encourage problematic code. People who know what they're doing can write whatever they want, but we shouldn't be handing out unstable explosives on street corners :-)