forth-package key-value name priority-queue key-value version 1.0.0 key-value description priority queue abstract data type key-list tags ANSForth94 key-list tags Forth-94 key-list tags Forth-2012 key-list tags data structure key-value main priority-queue.fs key-value author Ulrich Hoffmann key-value maintainer Ulrich Hoffmann key-value license MIT end-forth-package