HasCasl: Integrated higher-order specification and program development

  • Authors:
  • Lutz Schröder;Till Mossakowski

  • Affiliations:
  • DFKI-Lab Bremen and Department of Comput. Sci., Universität Bremen, Germany;DFKI-Lab Bremen and Department of Comput. Sci., Universität Bremen, Germany

  • Venue:
  • Theoretical Computer Science
  • Year:
  • 2009

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Abstract

We lay out the design of HasCasl, a higher order extension of the algebraic specification language Casl that serves both as a wide-spectrum language for the rigorous specification and development of software, in particular but not exclusively in modern functional programming languages, and as an expressive standard language for higher-order logic. Distinctive features of HasCasl include partial higher order functions, higher order subtyping, shallow polymorphism, and an extensive type-class mechanism. Moreover, HasCasl provides dedicated specification support for monad-based functional-imperative programming with generic side effects, including a monad-based generic Hoare logic.