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Restart STORE-VALUE

Data Arguments Required

a value to use instead (on an ongoing basis).

Description

The store-value restart is generally used by handlers trying to recover from errors of types such as cell-error or type-error, which may wish to supply a replacement datum to be stored permanently.

Examples

(defun type-error-auto-coerce (c) (when (typep c 'type-error) (let ((r (find-restart 'store-value c))) (handler-case (let ((v (coerce (type-error-datum c) (type-error-expected-type c)))) (invoke-restart r v)) (error ())))))

TYPE-ERROR-AUTO-COERCE

(let ((x 3)) (handler-bind ((type-error #'type-error-auto-coerce)) (check-type x float) x))

3.0

See Also