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Evalue+denv

Change-evalue+denv

Modifying constructor for evalue+denv structures.

Syntax

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

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

We construct a new evalue+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-evalue+denv

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