public ForEStatAST(ExprAST expr, ExprAST expr1, StatementAST sta)
 {
     statement=sta;
     expresion=expr;
     expresion1=expr1;
 }
 public IfElseStatAST(StatementAST ifs, StatementAST elses, ConditionsAST cond)
 {
     condicion=cond;
     ifstatement=ifs;
     elsestatement=elses;
 }
 public UnStatementAST(StatementAST sta)
 {
     statement=sta;
 }
 public WhileStatAST(ConditionsAST cond, StatementAST sta)
 {
     condicion=cond;
     statement=sta;
 }
 public ForBasicStatAST(ExprAST expr, StatementAST sta)
 {
     expresion=expr;
     statement=sta;
 }
 public IfStatAST(ConditionsAST cond, StatementAST sta)
 {
     statement=sta;
     condicion=cond;
 }