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Date:   Fri, 16 Apr 2021 22:45:07 +0000
From:   Al Viro <viro@zeniv.linux.org.uk>
To:     Willy Tarreau <w@1wt.eu>
Cc:     Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
        Connor Kuehl <ckuehl@redhat.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Miguel Ojeda <ojeda@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        rust-for-linux@vger.kernel.org,
        Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
        "open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Alex Gaynor <alex.gaynor@gmail.com>,
        Geoffrey Thomas <geofft@ldpreload.com>,
        Finn Behrens <me@kloenk.de>,
        Adam Bratschi-Kaye <ark.email@gmail.com>,
        Wedson Almeida Filho <wedsonaf@google.com>,
        Michael Ellerman <mpe@ellerman.id.au>
Subject: Re: [PATCH 04/13] Kbuild: Rust support
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On Sat, Apr 17, 2021 at 12:04:16AM +0200, Willy Tarreau wrote:

> Yep but I kept it just to have comparable output code since in C
> you'd simply use "goto leave" and not have this function call to
> do the cleanup.

... or use any number of other technics; the real question was how
much of cleanups would be skipped by that syntax sugar.

IME anything that interacts with flow control should be as explicit
and unambiguous as possible.  _Especially_ concerning how large
a scope are we leaving.

There's a bunch of disciplines that make use of that kind of tools
and do it more or less safely, but they need to be well-specified
and very well understood.  And some tools (C++-style exceptions,
for example) simply need to be taken out and shot, but that's
a separate story^Wflamewar...