Re: How can I change the arguments of a generic function in MCL?

[Mark Nahabedian <naha@RIVERSIDE.SCRC.Symbolics.COM>]

    Date: Wed, 21 Oct 1992 06:16 EDT
    From: ueda@shpcsl.sharp.co.jp (UEDA masaya)

    How can I change the arguments of a generic function in MCL environment?

       Date: Tue, 07 Jul 92 19:41:48 EDT
       From: moon (David A. Moon)

       You assumed when you read something about the language that the
       development environment would not let you change the arguments of a
       generic function.  That's jumping to a conclusion and I personally
       would consider any development environment that didn't let you do that
       to be pretty deficient.

    I came across the message "Error: Incompatible lambda list" when I
    tried to define an :after method and add a new keyword argument there. 
    Original lambda list has not any keyword argument.

    Any suggestion would be appreciated.

You need to redefine the generic function using DEFGENERIC if you want
to change its argument list.  Once you do that you will then need to
make the corresponding change to the argument list of every method and
recompile them.  This is true of every CLOS implementation.