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Annotation of 40BSD/cmd/pc0/yyseman.c, revision 1.1.1.1

1.1       root        1: /* Copyright (c) 1979 Regents of the University of California */
                      2: 
                      3: static char sccsid[] = "@(#)yyseman.c 1.1 8/27/80";
                      4: 
                      5: #include "whoami.h"
                      6: #include "0.h"
                      7: #include "yy.h"
                      8: 
                      9: /*
                     10:  * Assign semantics to a generated token
                     11:  *
                     12:  * Most terminals have a semantic value the current
                     13:  * input line.  If they are generated they are flagged
                     14:  * by having this number negated.
                     15:  *
                     16:  * The terminals which have true semantics such
                     17:  * as identifiers and strings are instead given
                     18:  * semantic value NIL here - we do not attempt
                     19:  * to do repair, e.g. by giving generated integers
                     20:  * the value 1, etc.
                     21:  */
                     22: nullsem(ch)
                     23:        int ch;
                     24: {
                     25: 
                     26:        switch (ch) {
                     27:                case YID:
                     28:                case YINT:
                     29:                case YNUMB:
                     30:                case YBINT:
                     31:                case YSTRING:
                     32:                        return (NIL);
                     33:                default:
                     34:                        return (-yyeline);
                     35:        }
                     36: }

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