Almost there

Faré fahree at
Tue Jul 14 20:17:21 UTC 2015

On Tue, Jul 14, 2015 at 3:40 PM, Attila Lendvai <attila at> wrote:
> no, i'm fine with the functinality of REGISTER-IMMUTABLE-SYSTEM.
> what i wasn't fine with is an exported global holding a hashtable, and
> at that time i hadn't noticed RIS because i was expecting a different
> name. REGISTER-IMMUTABLE-SYSTEM doesn't register any systems, it
> rather marks a system, that is already known by asdf, immutable. it's
> a different story that the implementation registers it in a hashtable
> as opposed to e.g. setting a flag on the system object.
Sorry, I don't remember why I did it with a hash-table rather than by
adding a boolean slot to the class SYSTEM. I believe the rationale was
that like with register-preloaded-system, you might want to the system
compilation product as a monolithic .fasl and register without even
having to a define with defsystem in the current image.

In any case, the current API is REGISTER-IMMUTABLE-SYSTEM and

> so, before i knew about RIS, i proposed an API that i still think
> would be better, namely SYSTEM-MUTABLE-P.
> if it's still feasible i suggest to replace REGISTER-IMMUTABLE-SYSTEM
> with (SETF SYSTEM-MUTABLE-P) and stop exporting *IMMUTABLE-SYSTEMS*.
I think it's too late to make changes for 3.1.5.

Indeed, it's probably a bad idea to export *IMMUTABLE-SYSTEMS*. Maybe
to late to fix in 3.1.5, but hopefully will be fixed in 3.2.

—♯ƒ • François-René ÐVB Rideau •Reflection&Cybernethics•
"Ask not what the government can do for you. Ask what the government is doing
to you." — David Friedman, "The Machinery of Freedom", p. 21

More information about the asdf-devel mailing list