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The Computer Journal 1983 26(2):175-183; doi:10.1093/comjnl/26.2.175
© 1983 by British Computer Society
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Programmer-Defined Control Operations

R. E. Griswold * and M. Novak *

Department of Computer Science, The University of Arizona, Tucson, USA

Although most programming languages have facilities that allow programmers to define procedures that augment the repertoire of built-in functions, comparatively few programming languages have facilities for defining control operations. This is not surprising, since the number of different control operations that can be comfortably accommodated in most programming languages is relatively small. Expressions in Icon can generate a sequence of results. This adds a dimension to control operations that is lacking in most programming languages and makes programmer-defined control operations interesting and useful. This paper describes such a facility and gives a number of examples of its use, including the definition of argument evaluation regimes.

Received October 1982.

* Department of Computer Science, The University of Arizona, Tucson, Arizona 85721, USA


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