1 /*- 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)yyseman.c 8.1 (Berkeley) 06/06/93"; 10 #endif /* not lint */ 11 12 #include "whoami.h" 13 #include "0.h" 14 #include "tree_ty.h" /* must be included for yy.h */ 15 #include "yy.h" 16 17 /* 18 * Assign semantics to a generated token 19 * 20 * Most terminals have a semantic value the current 21 * input line. If they are generated they are flagged 22 * by having this number negated. 23 * 24 * The terminals which have true semantics such 25 * as identifiers and strings are instead given 26 * semantic value NIL here - we do not attempt 27 * to do repair, e.g. by giving generated integers 28 * the value 1, etc. 29 */ 30 nullsem(ch) 31 int ch; 32 { 33 34 switch (ch) { 35 case YID: 36 case YINT: 37 case YNUMB: 38 case YBINT: 39 case YSTRING: 40 return (NIL); 41 default: 42 return (-yyeline); 43 } 44 } 45