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Expr-preinc

Change-expr-preinc

Modifying constructor for expr-preinc structures.

Syntax

(change-expr-preinc x 
                    [:arg <arg>])

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

We construct a new expr-preinc 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-preinc

(defmacro change-expr-preinc (x &rest args)
  (std::change-aggregate 'expr-preinc
                         x args '((:arg . expr-preinc->arg))
                         'change-expr-preinc
                         'nil))