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Annotation of 43BSDReno/pgrm/pascal/src/yyseman.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1980 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  */
                      6: 
                      7: #ifndef lint
                      8: static char sccsid[] = "@(#)yyseman.c  5.1 (Berkeley) 6/5/85";
                      9: #endif not lint
                     10: 
                     11: #include "whoami.h"
                     12: #include "0.h"
                     13: #include "tree_ty.h"   /* must be included for yy.h */
                     14: #include "yy.h"
                     15: 
                     16: /*
                     17:  * Assign semantics to a generated token
                     18:  *
                     19:  * Most terminals have a semantic value the current
                     20:  * input line.  If they are generated they are flagged
                     21:  * by having this number negated.
                     22:  *
                     23:  * The terminals which have true semantics such
                     24:  * as identifiers and strings are instead given
                     25:  * semantic value NIL here - we do not attempt
                     26:  * to do repair, e.g. by giving generated integers
                     27:  * the value 1, etc.
                     28:  */
                     29: nullsem(ch)
                     30:        int ch;
                     31: {
                     32: 
                     33:        switch (ch) {
                     34:                case YID:
                     35:                case YINT:
                     36:                case YNUMB:
                     37:                case YBINT:
                     38:                case YSTRING:
                     39:                        return (NIL);
                     40:                default:
                     41:                        return (-yyeline);
                     42:        }
                     43: }

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