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Feat

Change-feat

Modifying constructor for feat structures.

Syntax

(change-feat x 
             [:bits <bits>])

This is an often useful alternative to make-feat.

We construct a new feat 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-feat

(defmacro change-feat (x &rest args)
  (std::change-aggregate 'feat
                         x args '((:bits . feat->bits))
                         'change-feat
                         'nil))