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Trans-state

Change-trans-state

Modifying constructor for trans-state structures.

Syntax

(change-trans-state x 
                    [:tops <tops>])

This is an often useful alternative to make-trans-state.

We construct a new trans-state 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-trans-state

(defmacro change-trans-state (x &rest args)
  (std::change-aggregate 'trans-state
                         x args '((:tops . trans-state->tops))
                         'change-trans-state
                         'nil))