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Expr-predec

Change-expr-predec

Modifying constructor for expr-predec structures.

Syntax

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

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

We construct a new expr-predec 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-predec

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