Adding Fixed Point Data Types to base

[Henning Thielemann]

On Sun, 16 Oct 2016, Andrew Martin wrote:

> Like I said, I don't like doing things like this for the reasons that you would expect. I don't like that it
> breaks the PVP, makes running your test suite more difficult, and makes your haddocks not include information
> that might be available. But to get back to the original proposal, what are your thoughts on providing Free,
> Cofree, and Fix in base? I gather from your previous comment that you would prefer anything to conditional
> instances, but do you find that these recursive data types are commonly used enough to merit inclusion in base?

I haven't used them so far.