A Selective CPS Transformation

Lasse R. Nielsen

Abstract


The CPS transformation makes all functions continuation-passing, uniformly. Not all functions, however, need continuations: they only do if their evaluation includes computational effects. In this paper we focus on control operations, in particular ``call with current continuation'' and ``throw''. We characterize this involvement as a control effect and we present a selective CPS transformation that makes functions and expressions continuation-passing if they have a control effect, and that leaves the rest of the program in direct style. We formalize this selective CPS transformation with an operational semantics and a simulation theorem à la Plotkin.

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DOI: http://dx.doi.org/10.7146/brics.v8i30.21690
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ISSN: 0909-0878 

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