Re: Simultaneous generational GC and error-check immutables?

[haible (Bruno Haible)]

Mark Thomas <thommark@access.digex.net> tried this:

> ... following the instructions to enable
> better error-checking of immutables.  (I assume I automatically got
> generational garbage-collection.)

No, you didn't get generational GC; CLISP does not yet support immutable
checking and generational GC simultaneously.

> But the following sequence of forms gives no error message
> > (defvar temp-string "Matson")
> > (setf (char temp-string 0) #\W)

Immutable checking is only done for immutable objects whose printed represen-
tation has been read from a file, using LOAD. I felt it would be annoying,
especially for beginners, to get errors when evaluating forms like
  (nreverse '(a b c))
  (nstring-upcase "My Name")
interactively.


                    Bruno Haible
                    haible@ma2s2.mathematik.uni-karlsruhe.de