request for member `nvval' in something not a structure or union

[Galini]

Hello,

 

I am trying desperatly to compile my parser, however i can't get rid of the :

    request for member `nvval' in something not a structure or union

error messages with all names of union type members available...

 

I believe I know how to use the %union structure but still I got no idea why I keep getting this error on every line I attempt to assign value to a typed  $$ or read from $n ...

 

Some code snippets from my files :

 

typedef struct NUMVAL {
  float val;
  int varType;
}numVal;

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%union    {
        int  ival;
        float  fval;
        numVal  nvval;
          char* sval;
        }

 

%token TYPE_INT TYPE_REAL TYPE_BOOLEAN AND OR SEMI LPAREN RPAREN TRUE FALSE REAL
%type <nvval>  Num_Exp  Bool_Exp  _expression_
%token <sval> ID
%token <nvval> INTEGER

 

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Bool_Exp :
    TRUE {
         numVal* temp = (numVal*)malloc(sizeof(numVal));
         temp->val = 1;
         temp->varType = 0;
         $$ = *temp;}   |
    FALSE {
         numVal* temp = (numVal*)malloc(sizeof(numVal));
         temp->val = 0;
         temp->varType = 0;
         $$ = *temp;}   | 
    LPAREN Bool_Exp RPAREN { $$ = $2; }    ;

 

 

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And from the lexer file :

 

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[a-z]([0-9]|[a-z])*  {yylval.sval = strdup(yytext);
      return ID;}

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Anyone ????????

 

    Thanx in advance .