Re: [Haskell-cafe] instance Enum Double considered not entirely great?

On Tue, Sep 20, 2011 at 10:59 AM, Chris Smith wrote:

I certainly hope not.  Instead, perhaps the issue should be brought up with the fixed-point number library you're using, and they could fix their Enum instance to be more helpful.

I'm the author of the library in question. I intentionally chose the semantics for Enum as it is, although I'm not sure I'm prepared to say that Enum "should" have this behavior in general. Regardless, enumerating all values makes more sense to me, and we still have enumFromThen and enumFromThenTo, so no power is lost anyway. Float and Double are the only types I know of that don't enumerate all values by default in enumFrom and enumFromTo. - Jake