%{
#include <stdio.h>
#include <string.h>
#include "xmldata.h"

extern int yylineno;
%}

%union{
  char *str;
  AttrList alist;
  TextNodePtr tnode;
  ElemNodePtr enode;
  NodePtr     node;
}
%token ID ATTRVAL TEXT BELEMENT EELEMENT BPI EPI
%start DocXml
%type <str> ID ATTRVAL TEXT EELEMENT
%type <alist> Attr AttrList
%type <node> NodeList Node BElement EmptyElement

%%
DocXml : Declaration DocumentAbstractTree { printf("Reconheci um Documento XML!!!\n"); };

Declaration : BPI ID AttrList EPI { printf("PI%s\n",$2); showAttrList($3); };

AttrList : AttrList Attr { $$ = add2AttrList($1,$2); }
         | { $$ = NULL; }
         ;

Attr : ID '=' ATTRVAL { $$ = consAttrList($1,$3,NULL); };

BElement : ID AttrList { $$ = consNodefromElem(consElemNode($1,$2,NULL,NULL)); };

DocumentAbstractTree : BElement NodeList EELEMENT { $1->val.e->child = $2;
                                                    showNodeESIS($1); }; 

NodeList : NodeList Node { $$ = add2NodeList($1,$2); }
         | Node { $$ = $1; }
         ;

Node : TEXT { $$ = consNodefromText(consTextNode($1,NULL)); /* contents,sibling */ }
     | BElement NodeList EELEMENT { $1->val.e->child = $2;  /* add child list */
                                    $$ = $1; }
     | EmptyElement { $$ = $1; }
     ;

EmptyElement : BElement EEMPTY { $$ = $1; };
%%

int main()
{
  yyparse();
}

void yyerror(char *s)
{
  printf("%s near %d",s,yylineno);
}