-- Stability : experimental
-- Portability : portable
--
+-- NOTE: This module is DEPRECATED.
+-- The data structure in "Data.Sequence" is a faster queue and also
+-- supports a wider variety of operations.
+--
-- Queues with constant time operations, from
-- /Simple and efficient purely functional queues and deques/,
-- by Chris Okasaki, /JFP/ 5(4):583-592, October 1995.