Floating instance for Data.Fixed
I'd like to contribute a Floating instance for Data.Fixed. I'm concerned that it may be undesirable for a reason that is not occurring to me; I'd be pleased to learn of any objections.
In concept it's this, although I will investigate if there is an implementation with better performance:
lift :: (HasResolution a) => (Double -> Double) -> Fixed a -> Fixed a
lift f = realToFrac . f . realToFrac
instance (HasResolution a) => Floating (Fixed a) where
pi = realToFrac pi
sin = lift sin
-- etc, similar lift2 function for (**), logBase
Trac metadata
Trac field | Value |
---|---|
Version | 7.10.1 |
Type | FeatureRequest |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | libraries/base |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | ekmett, hvr |
Operating system | |
Architecture |