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Expression-var

Change-expression-var

Modifying constructor for expression-var structures.

Syntax

(change-expression-var x 
                       [:name <name>])

This is an often useful alternative to make-expression-var.

We construct a new expression-var 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-expression-var

(defmacro change-expression-var (x &rest args)
  (std::change-aggregate 'expression-var
                         x args '((:name . expression-var->name))
                         'change-expression-var
                         'nil))