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) 06/05/85"; 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 } 44