Enhancing the Pre- and Postcondition Technique for More Expressive Specifications

Date
1999-02-01
Authors
Leavens, Gary
Baker, Albert
Journal Title
Journal ISSN
Volume Title
Publisher
Altmetrics
Authors
Research Projects
Organizational Units
Computer Science
Organizational Unit
Journal Issue
Series
Abstract

We describe enhancements to the pre- and postcondition technique that help specifications convey information more effectively. Some enhancements allow one to specify redundant information that can be used in ``debugging'' specifications. For instance, adding examples to a specification gives redundant information that may aid some readers, and can also be used to help ensure that the specification says what is intended. Other enhancements allow improvements in frame axioms for object-oriented (OO) procedures, better treatments of exceptions and inheritance, and improved support for incompletely-specified types. Many of these enhancements were invented by other authors, but are not widely known. They have all been integrated into {\LCC}, a Larch-style behavioral interface specification language for C++. However, such enhancements could also be used to make other specification languages more effective tools for communication.

Description

To appear in Jeannette Wing and James Woodcock, editors. FM'99: World Congress on Formal Methods in Development of Computer Systems, Toulouse, France, September 1999. Lecture notes in Computer Science, Copyright © Springer-Verlag, 1999.

Keywords
formal methods, liberal specification, redundancy, debugging, history constraint
Citation
DOI
Source
Collections