From: Lucretia <laguest9000@googlemail.com>
Subject: Re: Implementing Rust's borrow checked pointers
Date: Tue, 24 Sep 2019 15:09:35 -0700 (PDT)
Date: 2019-09-24T15:09:35-07:00 [thread overview]
Message-ID: <1bf5a548-4d06-4a95-87f6-1e1170b04c99@googlegroups.com> (raw)
In-Reply-To: <lnpnjp5wyt.fsf@kst-u.example.com>
On Tuesday, 24 September 2019 20:13:33 UTC+1, Keith Thompson wrote:
> Lucretia <no> writes:
> > On Tuesday, 24 September 2019 12:23:30 UTC+1, Optikos wrote:
> >
> >> > begin
> >> > A.all ... ; -- raises exception.
> >>
> >> No, to be as useful as Rust's borrow checker, instead of raising
> >> exception, it needs to be a compile-time error. The compiler needs
> >> to maintain a whole-program directed graph at compile-time, not defer
> >> a detection-based localized analysis to run-time.
> >
> > Yes, the compiler would raise that exception at compile time. This
> > idea that all exceptions are raised at runtime is false and you should
> > check the AARM.
>
> Can you provide a specific citation?
No, I'm fairly sure I saw it in one of the AARM's under compilation requirements years ago, but I cannot find it now.
> Certainly a compiler can diagnose an error at compile time, but I've
> never heard that referred to as an "exception". And a compiler can
> generate code that unconditionally raises an exception, but that code is
> executed at run time.
I read it as the environment raises an exception like program_error on a compilation error.
next prev parent reply other threads:[~2019-09-24 22:09 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-24 9:05 Implementing Rust's borrow checked pointers Lucretia
2019-09-24 9:57 ` Dmitry A. Kazakov
2019-09-24 11:23 ` Optikos
2019-09-24 12:02 ` Lucretia
2019-09-24 14:08 ` Optikos
2019-09-24 18:56 ` Simon Wright
2019-09-24 19:13 ` Keith Thompson
2019-09-24 20:15 ` Optikos
2019-09-24 20:31 ` Keith Thompson
2019-09-24 20:40 ` Optikos
2019-09-24 20:53 ` Keith Thompson
2019-09-24 22:09 ` Lucretia [this message]
2019-09-24 22:24 ` Keith Thompson
2019-09-25 4:36 ` J-P. Rosen
2019-09-25 15:04 ` Simon Wright
2019-09-24 12:23 ` Lucretia
2019-09-25 17:21 ` Stephen Leake
2019-09-24 16:24 ` Jeffrey R. Carter
2019-09-25 16:26 ` Florian Weimer
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