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Reports (Research Report) Year : 1998

Symbolic Composition


The deforestation of a functional program is a transformation which gets rid ofintermediate data structures constructions that appear when two functions are composed. The descriptional composition, initially introduced by Ganzinger and Giegerich, is a deforestation method dedicated to the composition of two attribute grammars. This article presents a new functional deforestation technique, called symbolic composition, based on the descriptional composition mechanism, but extending it. An automatic translation from a functional program into an equivalent attribute grammar allows symbolic composition to be applied, and then the result can be translated back into a functional program. This yields a sourceto source functional program transformation. The resulting deforestation method provides a better deforestation than other existing functional techniques. Symbolic composition, that uses the declarative and descriptional features of attribute grammars is intrinsically more powerful than categorical-flavored transformations, whose recursion schemes are set by functors. These results tend to show that attribute grammars are a simple intermediate representation, particularly well-suited for program transformations.
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inria-00073341 , version 1 (24-05-2006)


  • HAL Id : inria-00073341 , version 1


Loïc Correnson, Étienne Duris, Didier Parigot, Gilles Roussel. Symbolic Composition. [Research Report] RR-3348, INRIA. 1998. ⟨inria-00073341⟩
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