Abstract:Safety has become a fundamental requirement in all aspects of computer systems. Object-oriented calculi, such as Castagna's λ&-calculus and its variants (Castagna, 1997) ensure type safety in environments based on the distinguished object-oriented paradigm. Although for safety reasons object invariance and operation specifications are getting widely employed in all stages of the engineering process, they are not supported by these calculi. In this paper, a new calculus is presented which supports term (val… Show more
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