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