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    • Scratchobj-cinst

    Change-scratchobj-cinst

    Modifying constructor for scratchobj-cinst structures.

    Syntax
    (change-scratchobj-cinst x 
                             [:val <val>]) 
    

    This is an often useful alternative to make-scratchobj-cinst.

    We construct a new scratchobj-cinst 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-scratchobj-cinst

    (defmacro change-scratchobj-cinst (x &rest args)
      (std::change-aggregate 'scratchobj-cinst
                             x args '((:val . scratchobj-cinst->val))
                             'change-scratchobj-cinst
                             'remake-scratchobj-cinst))