public MulCondTermAST(ConditionsAST cond, ConditionsAST conds)
 {
     condterm=cond;
     condterms=conds;
 }
 public WhileStatAST(ConditionsAST cond, StatementAST sta)
 {
     condicion=cond;
     statement=sta;
 }
 public IfElseStatAST(StatementAST ifs, StatementAST elses, ConditionsAST cond)
 {
     condicion=cond;
     ifstatement=ifs;
     elsestatement=elses;
 }
 public IfStatAST(ConditionsAST cond, StatementAST sta)
 {
     statement=sta;
     condicion=cond;
 }