You can't. You can use if the subroutine in local scope. 
{
        local $subRef = sub {
        $var = shift;
         print "hello monks --- [$var] \n";
      };
        &callFun();
}

sub callFun     {

&$subRef(20);

}

[download]
OR 

{
        $subRef = sub {
        $var = shift;
         print "hello monks --- [$var] \n";
      };
        
}
&$subRef;

[download]

In reply to Re: calling from outside the closure a sub defined in a closure by siva kumar
in thread calling from outside the closure a sub defined in a closure by spx2

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