Condition Class

Summary

The condition class used to signal errors from COM.

Package

com

Superclasses

cl:error

Subclasses

com-dispatch-invoke-exception-error

Initargs

:hresult

An integer giving the hresult of the error.

:function-name

Either nil or a string or symbol describing the function that generated the error.

Readers

com-error-hresult
com-error-function-name

Description

The class com-error is used by the Lisp COM API when signaling errors that originate as hresult code from COM.

Example

This function silently ignores the E_NOINTERFACE error:

(defun call-ignoring-nointerface-error (function)

  (handler-bind

      ((com-error

        #'(lambda (condition)

            (when (hresult-equal (com-error-hresult

                                  condition)

                                 E_NOINTERFACE)

              (return-from

                  call-ignoring-nointerface-error

                nil)))))

    (funcall function)))

See also

check-hresult
hresult-equal
hresult