error-feedback

Documentation
- Reference manual
- Packages
  - XPCE
    - Classes
      - class error
        
        Instance variables
        
        error-feedback
        
        error-format
        
        error-id
        
        error-kind

error <-> feedback: {report,throw,print,backtrace}

Determines how the error is reported (provided it is reported; see error<-kind). Its values are:

report

Invokes object->report to report the error. See also visual->report.

throw

If the error is raised in a context called by the host-language, and the host-language indicates it wants to handle the error itself, the error is recorded in the hosts goal-frame and the object->error succeeds with failure. When control is returned to the host-language, the host-language should raise and error (For example, as throw/1 in Prolog):

?- catch(send(@pce, hello), E, true).

E = error(pce(@290191/error,
                      [@pce/pce, (->), hello]),
                  send(@pce/pce, hello))

print

Prints the error in the window from which xpce was started.

See also: error-kind