From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Eli Barzilay <eli@barzilay.org>
Cc: emacs-devel@gnu.org
Subject: Re: [Emacs-diffs] trunk r117340: * lisp/calculator.el: Lots of revisions
Date: Wed, 18 Jun 2014 11:21:59 -0400 [thread overview]
Message-ID: <jwvzjha5k7t.fsf-monnier+emacsdiffs@gnu.org> (raw)
In-Reply-To: <E1Ww2Qw-0002aL-HF@vcs.savannah.gnu.org> (Eli Barzilay's message of "Sun, 15 Jun 2014 04:52:46 +0000")
> - (cl-letf (((symbol-function 'F)
> - (lambda (&optional x y) (calculator-funcall f x y)))
> - ((symbol-function 'D)
> - (lambda (x) (if calculator-deg (/ (* x 180) float-pi) x))))
> - (eval f `((X . ,X)
> - (Y . ,Y)
> - (TX . ,TX)
> - (TY . ,TY)
> - (DX . ,DX)
> - (L . ,L))))))
> - (error 0)))
> + (cl-flet ((F (&optional x y) (calculator-funcall f x y))
> + (D (x) (if calculator-deg (/ (* x 180) float-pi) x)))
> + (eval `(let ((X ,X) (Y ,Y) (DX ,DX) (TX ,TX) (TY ,TY) (L ',L))
> + ,f)
> + t)))))
Hmm... have you tested this? `cl-flet' creates lexically-scoped
function bindings (contrary to the old `flet'), so the F and D above in
your new code aren't accessible to the `f' expression.
As for changing the `eval' call, the form I used is more efficient than
the (eval `(let ...)) you're using now: what was the motivation for
this change?
> (let ((inp (or keys (this-command-keys))))
[...]
> + ;; translates kp-x to x and [tries to] create a string to lookup
> + ;; operators; assume all symbols are translatable via
> + ;; `function-key-map' or with an 'ascii-character property
> + (concat (mapcar (lambda (k)
> + (if (numberp k) k (or (get k 'ascii-character)
> + (error "??bad key??"))))
> + (or (lookup-key function-key-map inp) inp))))))
(this-command-keys) should return "fully decoded events", i.e. after
passing through the keyboard-coding-system, input-decode-map,
function-key-map, and key-translation-map. So neither (lookup-key
function-key-map inp) nor (get k 'ascii-character) should be necessary.
IOW if this code really is needed, it deserves a comment explaining
why it's needed despite the fact that function-key-map was
already applied.
Stefan
next prev parent reply other threads:[~2014-06-18 15:21 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <E1Ww2Qw-0002aL-HF@vcs.savannah.gnu.org>
2014-06-16 21:22 ` [Emacs-diffs] trunk r117340: * lisp/calculator.el: Lots of revisions Stefan Monnier
2014-06-18 10:08 ` Eli Barzilay
2014-06-18 18:49 ` Stefan Monnier
2014-06-23 5:21 ` Eli Barzilay
2014-06-23 5:48 ` Nicolas Semrau
2014-06-23 14:24 ` Stefan Monnier
2014-06-18 15:21 ` Stefan Monnier [this message]
2014-06-22 12:23 ` Eli Barzilay
2014-06-23 13:24 ` Stefan Monnier
2014-06-24 7:47 ` Eli Barzilay
2014-06-25 1:11 ` Stephen J. Turnbull
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