User Tools


Special Operator MULTIPLE-VALUE-PROG1

Syntax

  • multiple-value-prog1 first-form form*first-form-results

Arguments and Values

  • first-form - a form; evaluated as described below.
  • form - a form; evaluated as described below.
  • first-form-results - the values resulting from the evaluation of first-form.

Description

multiple-value-prog1 evaluates first-form and saves all the values produced by that form. It then evaluates each form from left to right, discarding their values.

Examples

(defparameter *temp* '(1 2 3))

*TEMP*

*temp*

(1 2 3)

(multiple-value-prog1 (values-list *temp*) (defparameter *temp* nil) (values-list *temp*))

1 2 3

Side Effects

None.

Affected By

None.

Exceptional Situations

None.

See Also

Notes

None.