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Frame

Change-frame

Modifying constructor for frame structures.

Syntax

(change-frame x 
              [:term <term>] 
              [:binding <binding>])

This is an often useful alternative to make-frame.

We construct a new frame 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-frame

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