# type-digits: Arbitrary-base type-level digits

[ bsd3, library, type-system ] [ Propose Tags ]

This is a workaround until type-level literals (specifically naturals) are more fully supported. The main difference is that these types-level digits and numerals can be inspected/case-discriminated within type family instances. See the type-ord and type-cereal packages for use cases; they ultimately support the yoko package. Arbitrary type-level digits, for when the radix itself doesn't actually matter. It's currently base-128, because that seemed to best expedite the compilation of the modules with which I using this package. Please let me know what you find if you experiment with this. Type.Digits.radix is the (arbitrary) radix. Type.Digits.digit computes the NameG of a digit from its value (assuming its less than the radix). Combinators are provided to compute a full type-level numeral from values (potentially) larger than the radix. The digits themselves all take less significant numeral as an argument. I chose this over minimal digits in promoted lists because I wanted to keep the actual encoding of type-level numeral smaller; they get quite large with some of my uses and the type family computation becomes quite slow.

Versions 0.1, 0.1.0.1, 0.1.0.2, 0.2, 0.3 base (==4.*), template-haskell, type-spine (>=0.2) [details] BSD-3-Clause Nicolas Frisby Nicolas Frisby Type System by NicolasFrisby at Wed Sep 12 14:54:55 UTC 2012 NixOS:0.3 1688 total (16 in the last 30 days) (no votes yet) [estimated by rule of succession] λ λ λ Docs uploaded by userBuild status unknown Hackage Matrix CI

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