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Binding

Change-binding

Modifying constructor for binding structures.

Syntax

(change-binding x 
                [:var <var>] 
                [:expr <expr>] 
                [:type <type>])

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 defprod.

Macro: change-binding

(defmacro change-binding (x &rest args)
  (std::change-aggregate 'binding
                         x args
                         '((:var . binding->var)
                           (:expr . binding->expr)
                           (:type . binding->type))
                         'change-binding
                         'nil))