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Expr-arrsub

Change-expr-arrsub

Modifying constructor for expr-arrsub structures.

Syntax

(change-expr-arrsub x 
                    [:arr <arr>] 
                    [:sub <sub>])

This is an often useful alternative to make-expr-arrsub.

We construct a new expr-arrsub 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-expr-arrsub

(defmacro change-expr-arrsub (x &rest args)
  (std::change-aggregate 'expr-arrsub
                         x args
                         '((:arr . expr-arrsub->arr)
                           (:sub . expr-arrsub->sub))
                         'change-expr-arrsub
                         'nil))