Chitil, Olaf
(2005)
Pretty printing with lazy dequeues.
Transactions on Programming Languages and Systems (TOPLAS), 27
(1).
pp. 163-184.
ISSN 0164-0925.
Abstract
There are several purely functional libraries for converting tree structured data into indented text, but they all make use of some backtracking. Over twenty years ago, Oppen published a more efficient imperative implementation of a pretty printer. This article shows that the same efficiency is also obtainable without destructive updates by developing a similar but purely functional Haskell implementation with the same complexity bounds. At its heart lie two lazy double ended queues.
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