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The Computer Journal 1975 18(4):349-354; doi:10.1093/comjnl/18.4.349
© 1975 by British Computer Society
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An algorithm for inverting certain translators of context-free languages

D. T. Goodwin *

Department of Computer Science, University of Keele, Keele, UK

This paper considers translators between related pairs of context-free languages. These translators are defined as grammars for input to a syntax-directed translation system on the lines of Metcalfe (1964) and Reeves (1967). By applying a simple algorithm to each of the production rules of such a grammar it is shown how to derive the inverse translator, under given conditions.

Received February 1972. Revised March 1974.

* Department of Computer Science, University of Keele, Keele, Staffs, ST5 5BG


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