* Why is Lisp_Object a struct?
@ 2013-02-03 18:41 Aurélien Aptel
2013-02-03 19:24 ` Eli Zaretskii
0 siblings, 1 reply; 2+ messages in thread
From: Aurélien Aptel @ 2013-02-03 18:41 UTC (permalink / raw)
To: Emacs development discussions
Hi,
I'm currently trying to write a guide/introduction to the Emacs core.
I was reading lisp.h and I was wondering:
Why can Lisp_Object be a struct? What is the purpose of the
CHECK_LISP_OBJECT_TYPE define?
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Why is Lisp_Object a struct?
2013-02-03 18:41 Why is Lisp_Object a struct? Aurélien Aptel
@ 2013-02-03 19:24 ` Eli Zaretskii
0 siblings, 0 replies; 2+ messages in thread
From: Eli Zaretskii @ 2013-02-03 19:24 UTC (permalink / raw)
To: Aurélien Aptel; +Cc: emacs-devel
> Date: Sun, 3 Feb 2013 19:41:34 +0100
> From: Aurélien Aptel <aurelien.aptel+emacs@gmail.com>
>
> Why can Lisp_Object be a struct?
To catch code that abuses the fact that Lisp_Object is an integer data
type.
> What is the purpose of the CHECK_LISP_OBJECT_TYPE define?
See above.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2013-02-03 18:41 Why is Lisp_Object a struct? Aurélien Aptel
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