5 { $class-description "A simple first-in-first-out queue. See " { $link "queues" } "." } ;
8 { $values { "queue" "a new queue" } }
9 { $description "Makes a new queue with no elements." } ;
12 { $values { "queue" "a queue" } { "?" "a boolean" } }
13 { $description "Tests if a queue contains no elements." } ;
16 { $values { "queue" "a queue" } { "elt" "an object" } }
17 { $description "Removes an element from the front of the queue." }
18 { $errors "Throws an " { $link empty-queue } " error if the queue has no entries." } ;
21 { $values { "elt" "an object" } { "queue" "a queue" } }
22 { $description "Adds an element to the back of the queue." } ;
25 { $description "Throws an " { $link empty-queue } " error." }
26 { $error-description "Thrown by " { $link deque } " if the queue has no entries." } ;