Lacking support for generic traversal, functional programming languages suffer from a scalability problem when applied to large-scale program transformation problems. As a solution, we introduce emph{functional strategies: typeful generic functions that not only can be applied to terms of any type, but which also allow generic traversal into subterms. We show how strategies are modelled inside a functional language, and we present a combinator library including generic traversal combinators. We illustrate our technique of programming with functional strategies by an implementation of the emph{extract method refactoring for Java.

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Software Engineering [SEN]
Software Analysis and Transformation

Lämmel, R, & Vonk, J. (2001). Typed combinators for generic traversal. Software Engineering [SEN]. CWI.