#if !defined(_CONDITIONAL_H_)
#define _CONDITIONAL_H_

#include "statement_list.h"
#include "list.h"

/*
 * CONDITIONAL STATEMENT
 * 
 * if (expr) {
 *    <statements>
 *    ...
 * }
 *
 * OR
 *
 * if (expr) {
 *    <statements>
 *    ...
 * } else {
 *    <statments>
 *    ...
 * }
 */
class conditional: public statement {
   protected:
      expression* condition;           // expr
      statement_list statements;       // if
      statement_list else_statements;  // else
   public:
      conditional(expression*);
      void add_statement(statement*);
      void add_else_statement(statement*);
      void execute(graphics_context&,drawable_list&,coordsys&,double*);
      virtual ~conditional();
};

#endif