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* bug#6750: Byte compiler: spurious message "cl used at runtime"
@ 2010-07-28 18:15 Alan Mackenzie
  2010-07-28 23:01 ` Stefan Monnier
  0 siblings, 1 reply; 6+ messages in thread
From: Alan Mackenzie @ 2010-07-28 18:15 UTC (permalink / raw)
  To: 6750

Hi, Emacs,

In this macro declaration:

    (defmacro c-declare-lang-variables ()
      `(progn
         ,@(mapcan (lambda (init)
                     `(,(if (elt init 2)
                            `(defvar ,(car init) nil ,(elt init 2))
                          `(defvar ,(car init) nil))
                       (make-variable-buffer-local ',(car init))))
                   (cdr c-lang-variable-inits))))

, (from cc-engine.el), the byte-compiler gives this warning:

    "Function `mapcan' from cl package called at runtime".

It is clear that the mapcan, being within a ,@ construct, does its work
at macro-expansion time, i.e. compile time.

Thus the warning message is wrong.  This is a bug.

-- 
Alan Mackenzie (Nuremberg, Germany).





^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2011-07-14 13:28 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2010-07-28 18:15 bug#6750: Byte compiler: spurious message "cl used at runtime" Alan Mackenzie
2010-07-28 23:01 ` Stefan Monnier
2010-07-29 19:03   ` Alan Mackenzie
2010-07-29 19:51     ` Juanma Barranquero
2010-07-30  9:18     ` Stefan Monnier
2011-07-14 13:28       ` Lars Magne Ingebrigtsen

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