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Re: Bison 1.30f

From: Hans Aberg
Subject: Re: Bison 1.30f
Date: Wed, 12 Dec 2001 18:51:59 +0100

At 16:24 +0100 2001/12/12, Akim Demaille wrote:
>Hans> I do not care about this myself; but if one should have
>Hans> backwards compatibility, then that is how it should have worked.
>What kind of backward compatibility issue are you referring to?

That Bison works the same way as in earlier versions, specifically, I had a
brief look at the alloca test section in bison.simple and got the
impression that if YYSTACK_USE_ALLOCA was undefined, the generated parser
would attempt to use alloca, but if not possible, it would use malloc

This would only be a backward compatibility issue if one think it is a
problem that somebody compiles an old program where YYSTACK_USE_ALLOCA is
undefined with the new version of Bison which selects malloc instead, and
for some reason, this is causing a problem.

If not, one can choose the simpler: if YYSTACK_USE_ALLOCA is not defined,
use malloc; if defined, use alloca. It looks as though bison.simple has
already been altered to close in to this picture.

  Hans Aberg

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