Apropos

multiple-value-prog1Special Operator

    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
    (setq temp '(1 2 3))  (1 2 3) 
    (multiple-value-prog1 
       (values-list temp) 
       (setq temp nil) 
       (values-list temp))  1, 2, 3
    See Also

    prog1