Re: MAKE-INSTANCE and STRUCTURE-CLASS

On 5 Jul 2026, at 18:45, Tim Bradshaw (as tfb at cley dot com) <[email protected]> wrote:
> 
> If you care about portable code then you don't.

Just to be clear: make-instance has two methods defined by the standard: one for standard-class and one for symbols, which just calls find-class on its first argument and recurses.

There is no method for structure-class.  You can't write such a method portably.

If an implementation has such a method (which I think it is allowed to have, probably), then presumably it also implements initialize-instance &c in something like the usual way although it would have to talk about how & whether slots get initialized especially if you have defined a BOA constructor &c.

--tim

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