--- capa/capa51/pProj/capaGrammarDef.y	1999/11/08 22:30:02	1.6
+++ capa/capa51/pProj/capaGrammarDef.y	2000/02/09 22:10:24	1.8
@@ -47,6 +47,7 @@
 int   yylex();
 void  yyerror(char*);
 void  free_calc_expr(Symbol*);
+void assign_pts (Symbol *, Symbol *, Symbol *);
 /******************************************************************************/
 /* GLOBAL VARIABLES                                                           */
 /******************************************************************************/
@@ -287,36 +288,36 @@ statement    :  IDENTIFIER '=' calc_expr
              ;
 
 rqo_def      :  rqo_speca             { rqo_1spec(); }
-             |  rqo_speca "," rqo_def { rqo_2spec(); }
+             |  rqo_speca ',' rqo_def { rqo_2spec(); }
              ;
 
 rqo_speca    : an_integer                 {start_rqo_type(SINGLE);append_rqo($1);}
-             | an_integer "!"             {start_rqo_type(IMMOBILE);append_rqo($1);}
-             | an_integer "-" an_integer  {start_rqo_type(RANGE);append_rqo($1);
+             | an_integer '!'             {start_rqo_type(IMMOBILE);append_rqo($1);}
+             | an_integer '-' an_integer  {start_rqo_type(RANGE);append_rqo($1);
                                            append_rqo($3);
                                           }
-             | an_integer "~" rqo_specb   {prefix_rqo($1);}
-             | an_integer "+" rqo_specc   {prefix_rqo($1);}
+             | an_integer '~' rqo_specb   {prefix_rqo($1);}
+             | an_integer '+' rqo_specc   {prefix_rqo($1);}
              ;
 
 rqo_specb    : an_integer                 {start_rqo_type(ALL_MIX);append_rqo($1);}
-             | an_integer "~" rqo_specb   {prefix_rqo($1);}
-             | an_integer "+" an_integer  {start_rqo_type(LAST_FIXED);append_rqo($1);
+             | an_integer '~' rqo_specb   {prefix_rqo($1);}
+             | an_integer '+' an_integer  {start_rqo_type(LAST_FIXED);append_rqo($1);
                                            append_rqo($3);}
              ;
 
 rqo_specc    : an_integer                 {start_rqo_type(ALL_FIXED);append_rqo($1);}
-             | an_integer "+" rqo_specd   {prefix_rqo($1);}
-             | an_integer "~" rqo_spece   {prefix_rqo($1);}
+             | an_integer '+' rqo_specd   {prefix_rqo($1);}
+             | an_integer '~' rqo_spece   {prefix_rqo($1);}
              ;
 
 rqo_specd    : an_integer                 {start_rqo_type(ALL_FIXED);append_rqo($1);}
-             | an_integer "+" rqo_specd   {prefix_rqo($1);}
+             | an_integer '+' rqo_specd   {prefix_rqo($1);}
              ;
 
 rqo_spece    : an_integer                 {start_rqo_type(FIRST_FIXED);append_rqo($1);}
-             | an_integer "~" rqo_spece   {prefix_rqo($1);}
-             | an_integer "+" an_integer  {start_rqo_type(BOTH_FIXED);append_rqo($1);
+             | an_integer '~' rqo_spece   {prefix_rqo($1);}
+             | an_integer '+' an_integer  {start_rqo_type(BOTH_FIXED);append_rqo($1);
                                            append_rqo($3);}
              ;
 
@@ -927,7 +928,7 @@ Symbol *name,*index;int free_symbols;
   sprintf(key,"%s[%s]",name->s_name,tmp);
   
   a_p = find_arrayid(name->s_name);   /* use the array name to search array tree */
-                                      /* */
+                                      /* did not check for error! */
   s_p = find_array_by_index(a_p,key); /* use the index portion to search along array linked list */
   capa_mfree((char *)tmp); capa_mfree((char *)key);
   
@@ -1088,7 +1089,7 @@ append_warn(type,str) int type;char *str
 /*********** if *b is a constant symbol, destroy (free) b ********************/
 /*********** if *a is a var symbol, create a new symbol **********************/
 /*                 do not free(*a)     */
-/*           */
+/*  If either a or b is invalid it propagates the error up the parse tree    */
 Symbol *
 symbols_op(a, b, op) Symbol *a; Symbol *b; int op;
 {
@@ -1103,12 +1104,11 @@ if( a->s_type == IDENTIFIER || b->s_type
    if(a->s_type == IDENTIFIER) { /* a is IDENTIFIER */
      sprintf(warn_msg,"var \"%s\" not defined before use.\n", a->s_name);
      capa_msg(MESSAGE_ERROR,warn_msg);
-     return (b);
+     return (a);
    } else { /* b is IDENTIFIER */
-     sprintf(warn_msg,
-      "var \"%s\" not defined before use.\n",b->s_name);
+     sprintf(warn_msg,"var \"%s\" not defined before use.\n",b->s_name);
      capa_msg(MESSAGE_ERROR,warn_msg);
-     return (a);
+     return (b);
    }
  } else {  /* a and b are neither identifiers */
   if( (a->s_type == I_VAR) ||
@@ -1799,7 +1799,9 @@ assign_id_list( s ) Symbol *s;
   }
 }
 
-void assign_pts ( Symbol* coord1, Symbol* coord2, Symbol* num) {
+/* void assign_pts ( Symbol* coord1, Symbol* coord2, Symbol* num) { */
+void assign_pts (coord1, coord2, num)Symbol *coord1;Symbol *coord2;Symbol *num;
+{
   PointsList_t *pt;
   if( LastPtsList != NULL ) {
     LastPtsList->pts_next = gen_ptslist( coord1, coord2, num );