Abstract
A static bounded polymorphic type system is presented in this paper, which ensures the progress property, i.e., the property that once a communication has been established, well-formed programs will never starve at communication points. The introduction of subtyping for session types and the relaxed duality relation increases the flexibility of the type system, and allows the participants in a conversation to follow different protocols that are nevertheless compatible in a sense defined by the subtyping relation. In addition, to keep progress in sessions, the type compliance is defined to associate with the relaxed duality relation, where the environment is balanced. Finally, the soundness and communication safety of the type system are proved, and some related work and possible future work in this area are discussed.
This work has been supported by the Natural Science Foundation of China under grant 60873234 and Top Key Discipline of Computer Software and Theory in Zhejiang Provincial Colleges at Zhejiang Normal University.
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Yang, Z., Zhong, F., Zhang, J. (2012). A Polymorphic Type System with Progress for Binary Sessions. In: Wang, F.L., Lei, J., Gong, Z., Luo, X. (eds) Web Information Systems and Mining. WISM 2012. Lecture Notes in Computer Science, vol 7529. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-33469-6_57
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