This module defines ports of the Range type family to work with BitPtrs. Rust’s own ranges have unstable internal details that make them awkward to use within the standard library, and essentially impossible outside it, with anything other than the numeric fundamentals.
In particular, bitvec uses a half-open range of BitPtrs to represent C++-style dual-pointer memory regions (such as BitSlice iterators). Rust’s own slice iterators also do this, but because *T does not implement the Step trait, the standard library duplicates some work done by Range types in the slice iterators just to be able to alter the views.
As such, Range<BitPtr<_, _, _>> has the same functionality as Range<*const _>: almost none. As this is undesirable, this module defines equivalent types that implement the full desired behavior of a pointer range. These are primarily used as crate internals, but may also be of interest to users.