An interface has the form:
INTERFACE id; Imports; Decls END id.where id is an identifier that names the interface, Imports is a sequence of import statements, and Decls is a sequence of declarations that contains no procedure bodies or non-constant variable initializations. The names declared in Decls and the visible imported names must be distinct. It is a static error for two or more interfaces to form an import cycle.
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Last modified on Wed Apr 3 09:39:04 PST 1996 by heydon modified on Mon Apr 18 14:04:10 PDT 1994 by kalsow