Text.Regex.Applicative.StateQueue

StateQueue is a data structure that can efficiently insert elements (preserving their order) and check whether an element with the given Int key is already in the queue.

The empty state queue

Insert an element in the state queue without a key.

Since insert doesn't take a key, it won't affect any insertUnique.

Insert an element in the state queue, unless there is already an element with the same key

Get the list of all elements