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Re: [Emacs-diffs] trunk r117464: Shrink Lisp_Sub_Char_Table by preferrin

From: Dmitry Antipov
Subject: Re: [Emacs-diffs] trunk r117464: Shrink Lisp_Sub_Char_Table by preferring C integers to Lisp_Objects.
Date: Thu, 03 Jul 2014 19:36:56 +0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0

On 07/03/2014 05:57 PM, Stefan Monnier wrote:

But I don't see why that necessarily implies casting
Lisp_Sub_Char_Table to a Lisp_Vector (I ask this question without
having spent much time looking for the answer in the source, maybe the
answer is obvious, but I think if you can tell me why it's a better use
of my time than trying to figure it out myself).

Hm... look at mark_char_table in alloc.c - this function implies that
both Lisp_Char_Table and Lisp_Sub_Char_Table pointers can be treated
as a pointer to their base type Lisp_Vector. Having both mark_char_table
and mark_sub_char_table looks a bit overengineered for me. This also
applies to Lisp_Char_Table/Lisp_Sub_Char_Table printing code in
print_object, etc.


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