IN: queues USING: help ; HELP: "( -- queue )" { $values { "queue" "a new queue" } } { $description "Makes a new queue with no elements." } ; HELP: queue-empty? "( queue -- ? )" { $values { "queue" "a queue" } { "?" "a boolean" } } { $description "Tests if a queue contains no elements." } ; HELP: deque "( queue -- elt )" { $values { "queue" "a queue" } { "elt" "an object" } } { $description "Removes an element from the front of the queue." } ; HELP: enque "( elt queue -- )" { $values { "elt" "an object" } { "queue" "a queue" } } { $description "Adds an element to the back of the queue." } ;