GNU bug report logs - #15880
Compute C declarations for DEFSYMs automatically.

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Package: emacs;

Reported by: Paul Eggert <eggert <at> cs.ucla.edu>

Date: Wed, 13 Nov 2013 00:35:02 UTC

Severity: wishlist

Tags: patch

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

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From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: 15880 <at> debbugs.gnu.org
Subject: bug#15880: Compute C declarations for DEFSYMs automatically.
Date: Thu, 14 Nov 2013 00:06:07 -0500

> I was thinking of something that didn't have a symbol_vals table, like this:

> struct Lisp_Symbol symbol_structs[N];
> #define Qnil make_lisp_ptr (symbol_structs + 0, Lisp_Symbol)
> #define Qt   make_lisp_ptr (symbol_structs + 1, Lisp_Symbol)
> ...

Oh, right.  So you need a mark_symbol_array function, but yes, that
could lead to slightly more efficient optimized code.  Of course,
without link-time optimization, it probably won't be any better than
what we have (tho not sure if it would be worse; probably a wash).


        Stefan
This bug report was last modified 10 years and 131 days ago.

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