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Expression-component

Change-expression-component

Modifying constructor for expression-component structures.

Syntax

(change-expression-component x 
                             [:multi <multi>] 
                             [:index <index>])

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

We construct a new expression-component 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-component

(defmacro change-expression-component (x &rest args)
  (std::change-aggregate 'expression-component
                         x args
                         '((:multi . expression-component->multi)
                           (:index . expression-component->index))
                         'change-expression-component
                         'nil))