From CML to process Algebras
DOI:
https://doi.org/10.7146/dpb.v22i433.6750Abstract
Reppy's language CML extends Standard ML of Milner et al. with primitives for communication. It thus inherits a notion of strong polymorphic typing and may be equipped with a structural operational semantics. We formulate an effect system for statically expressing the communication behaviours of CML programs as these are not otherwise reflected in the types.
We then show how types and behaviours evolve in the course of computation: types may decrease and behaviours may loose alternatives as well as decrease. It will turn out that the syntax of behaviours is rather similar to that of a process algebra; our main results may therefore be viewed as regarding the semantics of a process algebra as an abstraction of the semantics of an underlying programming language. This establishes a new kind of connection between ''realistic'' concurrent programming languages and ''theoretical'' process algebras.
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