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Circular programming is a powerful technique to express multiple traversal algorithms as a single traversal function in a lazy setting. Such a (virtual) circular program may contain circular definitions, that is, arguments of function calls that are also results of that same call. Although circular definitions always induce non-termination under a strict evaluation mechanism, they can sometimes be immediately evaluated using a lazy evaluation strategy. The lazy engine is able to compute the right evaluation order, if that order exists. Indeed, using this style of circular programming, the…mehr

Produktbeschreibung
Circular programming is a powerful technique to
express multiple traversal algorithms as a single
traversal function in a lazy setting. Such a
(virtual) circular program may contain circular
definitions, that is, arguments of function calls
that are also results of that same call. Although
circular definitions always induce non-termination
under a strict evaluation mechanism, they can
sometimes be immediately evaluated using a lazy
evaluation strategy. The lazy engine is able to
compute the right evaluation order, if that order
exists. Indeed, using this style of circular
programming, the programmer does not have to concern
him/herself with the definition and the scheduling of
the different traversal functions, since only a
single (traversal) function has to be defined.
Neither does the programmer have to define
intermediate gluing data structures to convey values
computed in one traversal and needed in a following one.

In this book, we present our studies on the design,
implementation and calculation of circular programs.
Autorenporträt
João Fernandes is a Postdoctoral researcher at the Department of
Informatics, University of Minho. He obtained his PhD. title in
2009, following his research on the analysis, transformation and
optimization of circular lazy functional programs, specially
under calculational form.