|Copyright||(c) David Feuer 2016|
This module is considered internal.
The Package Versioning Policy does not apply.
This contents of this module may change in any way whatsoever and without any warning between minor versions of this package.
Authors importing this module are expected to track development closely.
An extremely light-weight, fast, and limited representation of a string of
up to (2*WORDSIZE - 2) bits. In fact, there are two representations,
misleadingly named bit queue builder and bit queue. The builder supports
emptyQB, creating an empty builder, and
snocQB, enqueueing a bit.
The bit queue builder is then turned into a bit queue using
which bits can be removed one by one using
unconsQ. If the size limit is
exceeded, further operations will silently produce nonsense.
Create an empty bit queue builder. This is represented as a single guard bit in the most significant position.
Enqueue a bit. This works by shifting the queue right one bit, then setting the most significant bit as requested.
Convert a bit queue builder to a bit queue. This shifts in a new guard bit on the left, and shifts right until the old guard bit falls off.
Dequeue an element, or discover the queue is empty.