Author: Stan Eisenstat
Subject: Re: [Cs323] valid?
Date: Wednesday, 14 Oct 2020, 07:17:15

    > Message Posted By: Unknown
    >
    > Why is the following valid: "${a=${ab^}}" and why does it output "{ab^="?

Why do you think it is valid?  I get

  % /c/cs323/Hwk3/mcBash
  (1)$ ${a=${ab^}}
  Invalid expansion

--Stan-