BigFloat?

[Dominikus Dittes Scherkl via Digitalmars-d-learn]

On Tuesday, 17 February 2015 at 09:08:17 UTC, Vlad Levenfeld 
wrote:
> On Tuesday, 17 February 2015 at 08:05:49 UTC, Kagamin wrote:
>> Periodic fractions.
>
> Or transcendental numbers, for that matter, but arbitrary != 
> infinite. A max_expansion template parameter could be useful 
> here.
>
> For my use case I'm less concerned with absolute resolution 
> than with preserving the information in the smaller operand 
> when dealing with large magnitude differences.

We have rational (two bigint, one for the numerator and one for 
the denominator), which I like better than floatingpoint (it's 
more expressive).