usr/src/cmd/pi/yyseman.c

/* Copyright (c) 1979 Regents of the University of California */

static  char sccsid[] = "@(#)yyseman.c 1.1 8/27/80";

#include "whoami.h"
#include "0.h"
#include "yy.h"

/*
 * Assign semantics to a generated token
 *
 * Most terminals have a semantic value the current
 * input line.  If they are generated they are flagged
 * by having this number negated.
 *
 * The terminals which have true semantics such
 * as identifiers and strings are instead given
 * semantic value NIL here - we do not attempt
 * to do repair, e.g. by giving generated integers
 * the value 1, etc.
 */
nullsem(ch)
        int ch;
{

        switch (ch) {
                case YID:
                case YINT:
                case YNUMB:
                case YBINT:
                case YSTRING:
                        return (NIL);
                default:
                        return (-yyeline);
        }
}