%{
#include <stdio.h> /* printf() */
#include <string.h> /* strcpy() */
#include "defs.h"

int level = 0;
int pos = 0;

int IDENT_LENGHT = 2;
int LINE_WIDTH = 78;

void ident(int depth_level);
%}

%union {
  char s[ MAXSTRLEN + 1 ];
}

%start DOCUMENT
%token <s> PI_TAG_BEG PI_TAG_END STAG_BEG ETAG_BEG TAG_END ETAG_END CHAR S
%type <s> START_TAG END_TAG WORD

%%
DOCUMENT: PREFACE ELEMENT

PREFACE: PI_LIST  ;

PI_LIST: PI_TAG
  | PI_LIST PI_TAG
  | PI_LIST '\n'
;

PI_TAG: PI_TAG_BEG PI_TAG_END ;

ELEMENT: EMPTY_ELEMENT
  | TAGS_PAIR
;

EMPTY_ELEMENT: STAG_BEG ETAG_END  ;

TAGS_PAIR: START_TAG CONTENT END_TAG  ;

START_TAG: STAG_BEG TAG_END ;

END_TAG: ETAG_BEG TAG_END ;

CONTENT: CONTET_ELEMENT_LIST  ;

CONTET_ELEMENT_LIST: CONTET_ELEMENT
  | CONTET_ELEMENT_LIST CONTET_ELEMENT
;

CONTET_ELEMENT: ELEMENT
  | S
  | '\n'
  | WORD
;

WORD: CHAR
  | WORD CHAR
;


%%