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    • Struct-declon

    Change-struct-declon

    Modifying constructor for struct-declon structures.

    Syntax
    (change-struct-declon x 
                          [:tyspec <tyspec>] 
                          [:declor <declor>]) 
    

    This is an often useful alternative to make-struct-declon.

    We construct a new struct-declon 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-struct-declon

    (defmacro change-struct-declon (x &rest args)
      (std::change-aggregate 'struct-declon
                             x args
                             '((:tyspec . struct-declon->tyspec)
                               (:declor . struct-declon->declor))
                             'change-struct-declon
                             'nil))