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From: Rocky Bernstein <rb@dustyfeet.com>
To: emacs-devel <emacs-devel@gnu.org>
Subject: Should wide-int be registered in features?
Date: Thu, 5 Apr 2018 18:12:03 -0400	[thread overview]
Message-ID: <CANCp2gYeDVTmv6Dr6WXQMgrLY22tf2=2vYToz9Oz2oZ74tOSVw@mail.gmail.com> (raw)

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.. or in system-configuration. And/or shown in emacs-version?

Recently I was reading the thread "Floating-point constant folding in Emacs
byte compiler", and it looks like, as of now, most (or all) of the issues
raised have been resolved in the byte-code optimizer.

Although I'm happy that things are fixed now, there a part of me that asks:
what might have help detection and prevention of such a problem?

I think there should be a simple program to do some sanity checking of
bytecode *before* it gets run to warn of potential problems or worse does
partial execution work and then crashes.

I've mentioned this in the past, but I now realize that I can write such a
lint checker in Elisp Lisp as a side package.

But there are a couple additional features that might be helpful, both in
such a bytecode lint program and independent of that: whether emacs was
built with --with-wide-int.

My understanding of the floating-point-constant bug is that the behavior is
different between optimizaition on builds that differ using this option.

Other things like x-toolkit, gtk, multi-tty, are listed in features. Should
wide-int be something like this?

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             reply	other threads:[~2018-04-05 22:12 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-05 22:12 Rocky Bernstein [this message]
2018-04-05 22:21 ` Should wide-int be registered in features? Stefan Monnier
2018-04-05 22:34   ` rocky
2018-04-05 22:41     ` Noam Postavsky
2018-04-05 22:46       ` rocky
2018-04-06  0:56     ` Stefan Monnier
2018-04-06  6:28 ` Andreas Schwab
2018-04-06  6:30 ` Ulrich Mueller

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