From: Paul Eggert <eggert@cs.ucla.edu>
To: Stefan Monnier <monnier@iro.umontreal.ca>,
Chris Gregory <czipperz@gmail.com>
Cc: emacs-devel@gnu.org
Subject: Re: Simplify internal_catch()
Date: Wed, 28 Dec 2016 11:24:24 -0800 [thread overview]
Message-ID: <fb1da5e6-c5d9-9db5-a91b-ef5402ea1059@cs.ucla.edu> (raw)
In-Reply-To: <jwvwpek57je.fsf-monnier+emacs@gnu.org>
Stefan Monnier wrote:
> There's a fair bit of
>
> Lisp_Object foo;
>
> foo = ...;
>
> around, indeed, because at some point in the past, some C compilers did
> not support "Lisp_Object foo = ..." when Lisp_Object is a union type.
Actually, that kind of code was around because C89 did not allow declarations
after statements. Even ancient C compilers allowed union-typed expressions as
initial values for auto variables, and "Lisp_Object foo = ..." at block start
has been in Emacs since the beginning; it's in the very oldest code (dated 1985)
committed in the Emacs repository.
next prev parent reply other threads:[~2016-12-28 19:24 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-28 6:33 Simplify internal_catch() Chris Gregory
2016-12-28 8:48 ` Andreas Schwab
2016-12-28 16:45 ` Stefan Monnier
2016-12-28 19:24 ` Paul Eggert [this message]
2016-12-28 19:28 ` Stefan Monnier
2016-12-31 21:29 ` Paul Eggert
-- strict thread matches above, loose matches on Subject: below --
2016-12-28 7:34 [no subject] Chris Gregory
2016-12-28 7:42 ` Simplify internal_catch () Paul Eggert
2016-12-28 1:54 Simplify internal_catch() Chris Gregory
2016-12-28 2:50 ` Stefan Monnier
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