using Pkg


This PR as a standalone. The constructor from Unsigned exhibits type piracy, so beware.

Preface: there are two distinct concepts here -- a constructor for BitVector from unsigned integers, and l/r-shift[!] methods which match the corresponding shifts on bit indices. These methods may be useful if you find the motivation (or need) to work with raw bits, then later wish to use these raw bits as indices, in which case the most natural abstraction is a BitVector.

Admittedly a niche application (from the perspective of those fortunate souls not forced into bit-twiddling by pure efficiency concerns), but why roll your own abstraction over raw bits when Base provides such a rich interface with well-tested methods? Or, perhaps someone seeking to store the contents of a BitVector in a text format.