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A Pretty But Not Greedy Printer (Functional Pearl)

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Duration: 0:14:14 | Added: 12 Dec 2017
Jean-Philippe Bernardy, University of Gothenburg, gives the second presentation in the second panel, Functional Programming Techniques, in the ICFP 2017 conference.

This paper proposes a new specification of pretty printing which is stronger than the state of the art: we require the output to be the shortest possible, and we also offer the ability to align sub-documents at will. We argue that our specification precludes a greedy implementation. Yet, we provide an implementation which behaves linearly in the size of the output. The derivation of the implementation demonstrates functional programming methodology.

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