Error Handling
The procedure goops-error is called to raise an appropriate error by the default methods of the following generic functions:
slot-missing(see slot-missing)slot-unbound(see slot-unbound)no-method(see no-method)no-applicable-method(see no-applicable-method)no-next-method(see no-next-method)
If you customize these functions for particular classes or metaclasses, you may still want to use goops-error to signal any error conditions that you detect.
procedure: goops-error format-string arg …
Raise an error with key goops-error and error message constructed from format-string and arg .... Error message formatting is as done by scm-error.