From: Keith Thompson <kst-u@mib.org>
Subject: Re: Implementing Rust's borrow checked pointers
Date: Tue, 24 Sep 2019 12:13:30 -0700
Date: 2019-09-24T12:13:30-07:00 [thread overview]
Message-ID: <lnpnjp5wyt.fsf@kst-u.example.com> (raw)
In-Reply-To: 5edf39fb-169a-463a-b28e-ece1d3b553e0@googlegroups.com
Lucretia <laguest9000@googlemail.com> 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?
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've seen compile-time exceptions, but they were compiler bugs, not
diagnostics for the program being compiled.)
--
Keith Thompson (The_Other_Keith) kst-u@mib.org <http://www.ghoti.net/~kst>
Will write code for food.
void Void(void) { Void(); } /* The recursive call of the void */
next prev parent reply other threads:[~2019-09-24 19:13 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 [this message]
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
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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