From: Warner Losh <imp@bsdimp.com>
To: Steve Johnson <scj@yaccman.com>
Cc: The Eunuchs Hysterical Society <tuhs@tuhs.org>
Subject: Re: [TUHS] Archaic yacc C grammar
Date: Mon, 29 Oct 2018 12:37:31 -0600 [thread overview]
Message-ID: <CANCZdfqKWS+PO1WUpRk-kAysrT6g4ApMUok5E6J+nAr-HHU3zw@mail.gmail.com> (raw)
In-Reply-To: <068e3163f59e699e486287cf033dc226fbb59b87@webmail.yaccman.com>
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On Mon, Oct 29, 2018 at 12:30 PM Steve Johnson <scj@yaccman.com> wrote:
> We actually had a pretty good system for making changes like that. First,
> we would change
> the compiler to accept both the old and the new. Then we would produce a
> warning
> that on a particular date the old would no longer work. Then we made the
> old an error
> and printed a message about how to fix it. Eventually, we just let it be
> a syntax error.
> This process was applied many times on the way from typeless B to strongly
> typed C.
>
How long a transition period did you typically have?
Warner
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next prev parent reply other threads:[~2018-10-29 19:33 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-28 21:34 Lars Brinkhoff
2018-10-29 3:00 ` Steve Johnson
2018-10-29 7:31 ` Lars Brinkhoff
2018-10-29 17:52 ` Steve Johnson
2018-10-29 18:37 ` Warner Losh [this message]
2018-10-30 8:16 ` Lars Brinkhoff
2018-11-03 21:50 ` Steve Johnson
2018-10-29 19:02 ` David
2018-10-30 22:01 ` Steve Johnson
2018-10-31 0:58 ` Larry McVoy
2018-10-31 13:49 ` Clem Cole
2018-11-03 22:14 ` Steve Johnson
2018-10-31 6:09 ` Lars Brinkhoff
2018-10-31 15:39 Noel Chiappa
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