Modifications to the PL-156 Compiler during 1971,

Abstract

This report gives details of the changes in syntax of PL-516 and the additional constructions added since the publication of Com. Sci. Report No 44 and CCU Report No 9. The principal changes are the use of := for 'becomes'; an explicit 'block' structure around several declarations; 'case' statements and expressions; more elaborate 'for' clauses; simple conditional labels; a 'range' test in conditions; the binary operators 'min' and 'max'; and a few other minor changes. With the exception of the ':= change', programs which compiled successfully with the older system will still work. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1972
Accession Number
ADA101572

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  • Donald A. Bell

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  • National Physical Laboratory

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