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Expr-const

Change-expr-const

Modifying constructor for expr-const structures.

Syntax

(change-expr-const x 
                   [:const <const>] 
                   [:info <info>])

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

We construct a new expr-const 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-const

(defmacro change-expr-const (x &rest args)
  (std::change-aggregate 'expr-const
                         x args
                         '((:const . expr-const->const)
                           (:info . expr-const->info))
                         'change-expr-const
                         'remake-expr-const))