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2.23.1 Primary Method Errors

The standard requires that an error is signaled when a generic function is called and

• no primary method is applicable to the generic function’s actual arguments, and
• the generic function’s method combination is either the standard method combination or a method combination defined with the short form of define-method-combination. The latter includes the standardized method combinations like progn, and, etc.

Generic Function: pcl:no-primary-method gf &rest args ¶

In CMUCL, this generic function is called in the above erroneous cases. The parameter gf is the generic function being called, and args is a list of actual arguments in the generic function call.

Method: pcl:no-primary-method gf standard-generic-function) &rest args ¶

This method signals a continuable error of type pcl:no-primary-method-error.