afrac feature & Unicode Vulgar Fractions

[Alice196498]

One thing I’ve found to be generally uſeful, eſpecially when dealing with meaſurements, are fractions. In higher quality printing, as well as traditional printing, ſtacked fractions (alſo called “ nut fractions ”) are uſed. I ſhould like to propoſe that theſe be added to the typeface with the afrac OpenType feature. One free and uſeful way of doing this can be found in Nutſo by TiroTypeworks, from which I ſhould recommend uſing the Nutſo2 implementation, as it allows arbitrary ſtacked fractions up to 10 digits in either the numerator or denominator. It would be poſſible to expand this number of digits from 10 to ſomething elſe, ſuch as 30, but that may be a bit overkill.

I’d alſo like to ſee the Unicode vulgar fractions be completed and the frac feature expanded ſimilarly to allow for arbitrary lengths or a reaſonable cutoff equal to the afrac ſuggeſtion above, but perhaps that would be more fitting in a ſeparate iſſue ? Currently, Elſtob has only ½, ¼, and ¾, and the frac feature only creates theſe.