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Function

Change-function

Modifying constructor for function structures.

Syntax

(change-function x 
                 [:name <name>] 
                 [:params <params>] 
                 [:body <body>])

This is an often useful alternative to make-function.

We construct a new function 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-function

(defmacro change-function (x &rest args)
  (std::change-aggregate 'function
                         x args
                         '((:name . function->name)
                           (:params . function->params)
                           (:body . function->body))
                         'change-function
                         'nil))