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  ANSI Common Lisp   5 Data and Control Flow   5.1 Generalized Reference   5.1.2 Kinds of Places

5.1.2.4 THE Forms as Places

A the form can be used as a place, in which case the declaration is transferred to the newvalue form, and the resulting setf is analyzed. For example,

 (setf (the integer (cadr x)) (+ y 3))
is processed as if it were

 (setf (cadr x) (the integer (+ y 3)))


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