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| class-of value | primitive procedure |
| Return the GOOPS class of any Scheme value. |
| instance? object | primitive procedure |
Return #t if object is any GOOPS instance, otherwise
#f.
|
| is-a? object class | procedure |
Return #t if object is an instance of class or one of
its subclasses.
|
Implementation notes: is-a? uses class-of and
class-precedence-list to obtain the class precedence list for
object.