1 /* Copyright (c) 1979 Regents of the University of California */ 2 3 #ifndef lint 4 static char sccsid[] = "@(#)yyseman.c 2.1 02/08/84"; 5 #endif 6 7 #include "whoami.h" 8 #include "0.h" 9 #include "tree_ty.h" /* must be included for yy.h */ 10 #include "yy.h" 11 12 /* 13 * Assign semantics to a generated token 14 * 15 * Most terminals have a semantic value the current 16 * input line. If they are generated they are flagged 17 * by having this number negated. 18 * 19 * The terminals which have true semantics such 20 * as identifiers and strings are instead given 21 * semantic value NIL here - we do not attempt 22 * to do repair, e.g. by giving generated integers 23 * the value 1, etc. 24 */ 25 nullsem(ch) 26 int ch; 27 { 28 29 switch (ch) { 30 case YID: 31 case YINT: 32 case YNUMB: 33 case YBINT: 34 case YSTRING: 35 return (NIL); 36 default: 37 return (-yyeline); 38 } 39 } 40