Edward Dodge  <nospam@noreply.com> wrote:
+---------------
| ...why not call the macro once, with three parameters?
|    (enclosingfunction (macro "parameter1" "parameter2" "parameter3"))
| The problem now is this: how to getthe macro to return multiple
| parameters and splice them into the enclosing form?
+---------------

You can't do exactly that, since no form can reach "outside" itself.[1]
Instead, you would need your macro to take the "enclosingfunction"
as an argument [now no longer "enclosing" per se] along with the
additional parameters to be modified/passed, e.g.:

    (defmacro your-macro (function-name &rest forms)
      `(,function-name ,@(mapcar #'your-transformer-function forms)))

Where YOUR-TRANSFORMER-FUNCTION is some ordinary function
of one s-expr, argument that returns one s-expr.

For example:

    > (defmacro funcall-with-incremented-args (function-name &rest forms)
	(flet ((transformer (x) `(1+ ,x)))
          `(,function-name ,@(mapcar #'transformer forms))))

    FUNCALL-WITH-INCREMENTED-ARGS
    > (* 2 3 4)

    24
    > (funcall-with-incremented-args * 2 3 4)

    60
    > (macroexpand '(funcall-with-incremented-args * 2 3 4))

    (* (1+ 2) (1+ 3) (1+ 4))
    T
    > 



-Rob

[1] Except perhaps by emitting references to free variables,
    usually a dangerous practice, but that's another story...

    Or by playing games with the macro &ENVIRONMENT, and
    that's a *whole* 'nother story!!

-----
Rob Warnock			<rpw3@rpw3.org>
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