Extending B with control flow breaks

Authors:
Lilian Burdy;Antoine Requet
Affiliations:
Gemplus Research Lab, La Ciotat Cedex, France;Gemplus Research Lab, La Ciotat Cedex, France
Venue:
ZB'03 Proceedings of the 3rd international conference on Formal specification and development in Z and B
Year:
2003

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Abstract

This paper describes extensions of the B language concerning control flow breaks in implementations and specification of operations with exceptional behaviors. It does not claim to define those extensions in a pure formal and complete way. It is rather a presentation of what could be done and how it could be done. A syntax is proposed and proof obligations are defined using a weakest precondition calculus extended to deal with abrupt termination. Examples emphasizing the advantages of these extensions are also given.