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Binding

Change-binding

Modifying constructor for binding structures.

Syntax

(change-binding x 
                [:variables <variables>] 
                [:value <value>])

This is an often useful alternative to make-binding.

We construct a new binding 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-binding

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