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Re: [O] new exporter


From: Jambunathan K
Subject: Re: [O] new exporter
Date: Sat, 14 Jul 2012 22:18:43 +0530
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.1 (windows-nt)

Nicolas Goaziou <address@hidden> writes:

> Hello,
>
> Achim Gratz <address@hidden> writes:
>
>> Yes, that has been my impression as well.  Again, I can make them go
>> away by removing one of the byte-compiled files, so I rather suspect
>> another case of a macro expansion that's not quite what was intented.
>> Only this time I really don't see from the backtrace what that would
>> be.
>
> It looks like table-cells have a wrong `:parent' property when
> org-element.el is byte-compiled.  In `org-element-table-cell-parser',
> replacing backquote with `list' solves the problem.


> This is related to modifications by side-effect of list elements, but
> I don't know why it only happens when the file is byte-compiled and why
> it only focus table cells.

There is an interesting  "pitfall" mentioned wrt `nconc' under:
   (info "(elisp) Rearrangement").

I try to make sense of the pitfall by conjuring up this argument.  This
seems right to me.
- `list' will dynamically allocate the list at runtime.  It comes from
  C's heap.

- A quote list is allocated at compile time (atleast the constant
  bits). It comes from memory that is allocated for global variables -
  externs or static externs.  Think value of list is the pointer to an
  extern C variable.

I am not sure what backquote does.

Wrt above problem, you may want to verify the following:
1. It works right the first time.  But subsequent invocations create
   side-effect.
2. Focus on what happens to the `head' of the list.

I am more or less facing similar problems wrt element translation.  I am
holding off any checkin mainly because I see some undesirable
side-effects.
-- 



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