Missing tie Methods

• If you assign to a tied variable and you don't have a STORE method defined, you'll get a fatal error.

• The standard Tie::StdScalar, Tie::StdArray, and Tie::StdHash classes provide reasonable defaults.

• But for simple behavior, an easy thing to do is

        sub unimplemented { }

• or

        # Load `Carp' when needed
        sub forbidden { 
          require Carp;
          Carp::croak("Operation not permitted on tied hash");
        }

        for $name (qw(STORE DELETE CLEAR FIRSTKEY NEXTKEY)) {        
          *{$name} = \&forbidden;
        }

• There's that magic glob again.

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Copyright © 2003 M. J. Dominus