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Expression-const

Change-expression-const

Modifying constructor for expression-const structures.

Syntax

(change-expression-const x 
                         [:value <value>])

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

We construct a new expression-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-expression-const

(defmacro change-expression-const (x &rest args)
  (std::change-aggregate 'expression-const
                         x args
                         '((:value . expression-const->value))
                         'change-expression-const
                         'nil))