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Tree-list-tuple4

Change-tree-list-tuple4

Modifying constructor for tree-list-tuple4 structures.

Syntax

(change-tree-list-tuple4 x 
                         [:1st <1st>] 
                         [:2nd <2nd>] 
                         [:3rd <3rd>] 
                         [:4th <4th>])

This is an often useful alternative to make-tree-list-tuple4.

We construct a new tree-list-tuple4 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-tree-list-tuple4

(defmacro change-tree-list-tuple4 (x &rest args)
  (std::change-aggregate 'tree-list-tuple4
                         x args
                         '((:1st . tree-list-tuple4->1st)
                           (:2nd . tree-list-tuple4->2nd)
                           (:3rd . tree-list-tuple4->3rd)
                           (:4th . tree-list-tuple4->4th))
                         'change-tree-list-tuple4
                         'nil))