[OS X Emacs] "with-current-buffer" issues
jamshark70 at gmail.com
Thu Jun 24 02:28:07 EDT 2010
I am using Aquamacs to run supercollider
(http://supercollider.sourceforge.net) via sclang-mode. One of the
features is rudimentary document integration. When a buffer is opened
for a supercollider code file, it gets registered with a sclang-document
object on the Lisp side, and functions are called in the supercollider
interpreter to create a Document object pointing to it.
The problem is when a buffer gets killed. There's a hook to close the
(defun sclang-document-kill-buffer-hook-function ()
(defun sclang-close-document (buffer)
(message "closing buf id %d" sclang-document-id)
(setq sclang-document-list (delq buffer sclang-document-list))
(defmacro with-sclang-document (buffer &rest body)
`(when (sclang-document-p buffer)
, at body)))
I'm observing that the main body of sclang-close-document is running
every time a buffer is killed, even if the buffer should not be
associated with a sclang-document. The result is that Document objects
are being closed in the sclang interpreter even though their buffers
still exist in Emacs.
But, for instance, if I open a class library file, I can see on the
interpreter side that it gets ID 3. But when I kill that buffer,
supercollider closes the document for ID 2. So now I have a Document
object in the interpreter for a buffer that is gone, and another buffer
that is still open in Emacs has no Document object in the interpreter.
It sounds like with-current-buffer is operating on the wrong buffer.
I've been discussing this with the sclang-mode developers and they are
convinced that the code is fine. Moreover, /this behavior is not
reproducible in Emacs on Linux/. So it suggests that Aquamacs is
evaluating the Lisp function(s) in this case differently from standard
Any ideas? If there is a discrepancy (I know, I know, "Aquamacs is not
Emacs!"), how could the sclang-mode functions be modified to be safe for
both standard Emacs and Aquamacs?
James Harkins /// dewdrop world
jamshark70 at dewdrop-world.net
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Sing me a song no poet has yet chanted,
Sing me the universal." -- Whitman
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