what's wrong here? (shift/reduce problem)

[Fiordean Dacian]

Hi all,

 

I don't have a solution yet for my problem, but I've the same comportament in a much simpler grammer, which I'm saying that's the same kind of error.

 

The lexer:

 

/* macros */
BLANK       [ \t\n]
LETTER       [A-Za-z]
DIGIT       [0-9]
NATIONAL      address@hidden|\}\~\^]
ALPHA       {LETTER}|{DIGIT}|{NATIONAL}
WORD       ({ALPHA}|".")*{ALPHA}({ALPHA}|".")*
OTHER       [\?\&]
SPECIAL       [\+\-\%\!\/\>\*\(\)\"\,\=\:]
NQTEXT       {ALPHA}|{OTHER}|{SPECIAL}|[\.\_\ \;]
STRING       [^;]+
NAME       {WORD}("_"{WORD})*

 

%%
{NAME} {
   xxlval.string_type = new char[strlen(xxtext) + 1];
   strcpy(xxlval.string_type, xxtext);
   return TK_NAME;
  }
.  {
   return xxtext[0];
  }

 

The parser:

 

%union
{
 char* string_type;
}

 

%token <string_type> TK_NAME

 

%type <string_type> name
%type <string_type> parameter_list
%type <string_type> with_possible_parameter_list

 

%%

 

name
 : TK_NAME
 ;

 

with_possible_parameter_list
        : '(' parameter_list ')' { $$=$2; }
        | /* empty */       { $$=0;  }

 

parameter_list
    : name 
     {
      $$ = $1;
     }
    | name ',' parameter_list
     {
      char s[1024] = {'\0'};
      strcpy(s, $1);

 

      if (strlen(s))
       strcat(s, ",");
       
      strcat(s, $3);
     
      char *ret = new char[strlen(s) + 1];
      strcpy(ret, s);
      $$ = ret;
      
      delete $1;
      delete $3;
     }    
    ;

 

 

For the input:

 

(1)

 

I get parsing error. Why's that ?????

 

Thanks,

// D.