normalize-direct-slots

Arguments: metaclass superclasses name direct-slots

Returns a normalized list of slots as part of the macro-expansion of a defclass form. A method specialized on a defclass-embellisher class-metaobject (see the defclass-embellisher-class) can take the opportunity to push extra forms to the resultant macro-expansion. It is expected that call-next-method be used to implement the lower-level functionality of normalizing the slots.

Predefined methods

(method normalize-direct-slots (t t t t))

A catch-all method: the direct-slots argument is processed and normalized for return.

(method normalize-direct-slots (symbol t t t))

If the metaclass argument is nil then the direct-slots argument is processed and normalized for return, as with the catch-all method above; otherwise, find-class is used to look up the class (which must be defined at the time of the lookup) and normalize-direct-slots is recursed on with that class metaobject.

The example in Metaclasses for embellishing class definitions in implementation.htm has an example of this method being used.

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This page is new in the 10.1 release.
Created 2019.8.20.