_Added in 2.4_

*$calias*

Returns the calling alias for the current script,

<pre>
alias test1 {
  echo -ag Calling alias is $calias
  noop $test2
}

alias test2 {
  echo -ag Calling alias is still $calias
  noop $test3
}

alias test3 {
  echo -ag Calling alias is still $calias
}
</pre>