#if !defined(_PARSER_H_)
#define _PARSER_H_

#include "figures.h"
#include "drawable_list.h"
#include "statement_list.h"
#include "conditional.h"
#include "figure.h"
#include "graphics_context.h"
#include "symbol_table.h"
#include "exprparser.h"
#include "lexer.h"
#include <iostream.h>

struct parse_error {
   char error[256];
   int line_number;
   parse_error(int,const char* = "parse error");
};

class parser {
   private:

      lexer lex;
      expression_parser exprparser;

      double xmin, xmax, ymin, ymax;
      int xres, yres;

      graphics_context gc;
     
      symbol_table T; 

      double read_eval_exp(istream&,list<char*>&,double*);

      coordinate read_coordinate(istream&,list<char*>&,double*);
      color read_color(istream&,list<char*>&,double*);

      point* read_point(istream&,list<char*>&,double*);
      line* read_line(istream&,list<char*>&,double*);
      rectangle* read_rectangle(istream&,list<char*>&,double*);
      triangle* read_triangle(istream&,list<char*>&,double*);
      square* read_square(istream&,list<char*>&,double*);
      ellipse* read_ellipse(istream&,list<char*>&,double*);
      circle* read_circle(istream&,list<char*>&,double*);
      void read_figure(istream&,list<char*>&,double*,drawable_list&,
         figure_descriptor*);

      void read_shape(istream&,list<char*>&,double*,drawable_list&);

      void read_coordinate_expression(istream&,list<char*>&,
         expression*&, expression*&);

      conditional* read_conditional(istream&,list<char*>&);
      set_color* read_set_color(istream&,list<char*>&);
      set_single_val* read_set_single_val(istream&,list<char*>&);
      set_rotation_center* read_set_rotation_center(istream&,list<char*>&);
      draw_point* read_draw_point(istream&,list<char*>&);
      draw_line* read_draw_line(istream&,list<char*>&);
      draw_circle* read_draw_circle(istream&,list<char*>&);
      draw_square* read_draw_square(istream&,list<char*>&);
      draw_rectangle* read_draw_rectangle(istream&,list<char*>&);
      draw_ellipse* read_draw_ellipse(istream&,list<char*>&);
      draw_triangle* read_draw_triangle(istream&,list<char*>&);
      draw_figure* read_draw_figure(istream&,list<char*>&,figure_descriptor*);
      statement* read_statement(istream&,list<char*>&);

      void read_figure_descriptor(istream&);

       
       

   public:
      parser();
      void parse(drawable_list&,istream&);
      int x_resolution() const;
      int y_resolution() const;
};

#endif