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Value?+denv

Change-value?+denv

Modifying constructor for value?+denv structures.

Syntax

(change-value?+denv x 
                    [:value? <value?>] 
                    [:denv <denv>])

This is an often useful alternative to make-value?+denv.

We construct a new value?+denv structure that is a copy of x, except that you can explicitly change some particular fields. Any fields you don't mention just keep their values from x.

Definition

This is an ordinary change- macro introduced by fty::defprod.

Macro: change-value?+denv

(defmacro change-value?+denv (x &rest args)
  (std::change-aggregate 'value?+denv
                         x args
                         '((:value? . value?+denv->value?)
                           (:denv . value?+denv->denv))
                         'change-value?+denv
                         'nil))