Abstraction mechanisms in CLU

@article{Liskov1977AbstractionMI,
  title={Abstraction mechanisms in CLU},
  author={Barbara H. Liskov and Alan Snyder and Russell R. Atkinson and Craig Schaffert},
  journal={Communications of The ACM},
  year={1977},
  volume={20},
  pages={564-576}
}
CLU is a new programming language designed to support the use of abstractions in program construction. Work in programming methodology has led to the realization that three kinds of abstractions—procedural, control, and especially data abstractions—are useful in the programming process. Of these, only the procedural abstraction is supported well by conventional languages, through the procedure or subroutine. CLU provides, in addition to procedures, novel linguistic mechanisms that support the… 
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25 References

Programming with abstract data types

An approach which allows the set of built-in abstractions to be augmented when the need for a new data abstraction is discovered and is an outgrowth of work on designing a language for structured programming.

An introduction to the construction and verification of Alphard programs

This paper introduces Alphard by developing and verifying a data structure definition and a program that uses it and shows how each language construct contributes to the development of the abstraction and discusses the way the language design and the verification methodology were tailored to each other.

Abstraction and Verification in Alphard: Introduction to Language and Methodology

This paper attempts to capture the symbiotic influence of these two goals on the design of Alphard by interleaving the language description with the presentation of a proof technique and discussion of programming methodology.

Abstract data types and software validation

The major thrust of the paper is shown how the use of algebraic axiomatizations can simplify the process of proving the correctness of an implementation of an abstract data type.

Specification techniques for data abstractions

The role of formal specifications both in proofs of program correctness and in programming methodologies leading to programs which are correct by construction, is explained and some criteria are established for evaluating the practical potential of specification techniques.

Information Distribution Aspects of Design Methodology

The role of documentation in the design and implementation of complex systems is explored, resulting in suggestions in sharp contrast with current practice, and the thesis that such information "broadcasting is harmful, that it is helpful if most system information is hidden from most programmers, is supported.

The programming language PASCAL

  • J. Wakerly
  • Computer Science
    Microprocess. Microsystems
  • 1979

A program data flow analysis procedure

The global data relationships in a program can be exposed and codified by the static analysis methods described in this paper. A procedure is given which determines all the definitions which can…

Programming-in-the-Large Versus Programming-in-the-Small

The activity of writing large programs is distinguished from that of writing small ones, which means systems consisting of many small programs (modules), usually written by different people.

A note on the for statement

This note discusses methods of defining the for statement in high level languages and suggests a proof rule intended to reflect the proper role of a for statement in computer programming. It…