public DesigPAFactorAST(DesignatorAST des, ActParsAST par)
 {
     pars=par;
     desig=des;
 }
 public DesigEStatAST(DesignatorAST desig, ExprAST expr)
 {
     designator=desig;
     expresion=expr;
 }
 public DesigplusStatAST(DesignatorAST desig)
 {
     designator=desig;
 }
 public DesigPAStatAST(DesignatorAST desig, ActParsAST expr)
 {
     designator=desig;
     expresion=expr;
 }
 public DesigPFactorAST(DesignatorAST des)
 {
     desig=des;
 }
 public DesigminusStatAST(DesignatorAST des)
 {
     designator=des;
 }
 public ReadStatAST(DesignatorAST desig)
 {
     designator=desig;
 }