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Mikael Djurfeldt writes: > > > Note that I finally followed Maciej and others' advice regarding the > order of arguments. It is most intuitive to have the expansion: > > (set! (PWS A1 ...) V) --> ((SETTER PWS) A1 ... V) > > and it has the advantage of working with all setters except the > current array-set! which I think should be modified. > Is it possible to make it work with the slot-set! in BOS (Bryan O. Sullivan's Scheme Object System for R4RS), or other third-party object systems? (the syntax of slot-ref! is simple: (slot-set! obj slot newval) checks if obj belongs to a bos class with a mentioned slot (a symbol) and changes its value on success to newval, otherwise it causes an error exit.) -- Klaus Schilling