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defstruct slots' default-inits
Is the following legal CL:
(b (+ a 2)))
Specifically, is the default-init form of a slot allowed to reference the
values of slots to its left (above)? In other words, is the above
defined by CL to be equivalent to
(defstruct (foo (:constructor make-foo (&key (a 1) (b (+ a 2)))))
(assuming that &key was allowed in the lambda-list for a BOA
The only hint that I can find that indicates that it is legal is on
page 309 (bottom): "It is as if the initialization forms were used as
init forms for the keyword parameters of the constructor function."
Is there a more direct statement about the interaction of default-init
forms and other slots? If not, there should be.