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From: Mark Wielaard <mark@klomp.org>
To: Thomas Schwinge <thomas@codesourcery.com>,
	Raiki Tamura <tamaron1203@gmail.com>,
	Jakub Jelinek <jakub@redhat.com>,
	Philip Herron <herron.philip@googlemail.com>
Cc: gcc@gcc.gnu.org, gcc-rust@gcc.gnu.org,
	"David Edelsohn" <dje.gcc@gmail.com>,
	"Arthur Cohen" <arthur.cohen@embecosm.com>,
	"Arsen Arsenović" <arsen@aarsen.me>
Subject: Re: [GSoC] gccrs Unicode support
Date: Thu, 16 Mar 2023 13:58:57 +0100	[thread overview]
Message-ID: <a476e56f825e8570a3f885491f871469879305c6.camel@klomp.org> (raw)
In-Reply-To: <87lejxujso.fsf@euler.schwinge.homeip.net>

Hi,

On Thu, 2023-03-16 at 10:28 +0100, Thomas Schwinge wrote:
> I'm now also putting Mark Wielaard in CC; he once also started discussing
> this topic, "thinking of importing a couple of gnulib modules to help
> with UTF-8 processing [unless] other gcc frontends handle [these things]
> already in a way that might be reusable".  See the thread starting at
> <https://inbox.sourceware.org/gcc/YPQrMBHyu3wRpT5o@wildebeest.org>
> "rust frontend and UTF-8/unicode processing/properties".

Thanks. BTW. I am not currently working on this.
Note the responses in the above thread by Ian and Jason who pointed out
that some of the requirements of the gccrs frontend might be covered in
the go frontend and libcpp, but not really in a reusable way.

One other thing you might want to coordinate on is NFC normalization
and Confusable Detection for identifiers.
https://unicode.org/reports/tr39/#Confusable_Detection
There has been some work on this by David Malcolm and Marek Polacek
https://developers.redhat.com/articles/2022/01/12/prevent-trojan-source-attacks-gcc-12
But that is on a slightly higher source level (not specific to
identifiers).

You might want to research whether NFC normalization of identifiers is
required to be done by the lexer or parser in Rust and how it interacts
with proc macros.

Cheers,

Mark

  reply	other threads:[~2023-03-16 12:59 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-18 13:22 rust frontend and UTF-8/unicode processing/properties Mark Wielaard
2021-07-18 20:12 ` Ian Lance Taylor
2021-07-18 22:23   ` Jason Merrill
2021-07-23 11:29     ` Philip Herron
     [not found] ` <d5e7434b-80e8-2817-ed87-a23ef2ac0cbb@uma.es>
     [not found]   ` <CAOWUKr0Sd3RRSy2cuqMLj--KTWqOz=nQMxmx7ahM8YunrFzEig@mail.gmail.com>
2023-03-15 11:00     ` [GSoC] gccrs Unicode support Philip Herron
2023-03-15 14:53       ` Arsen Arsenović
2023-03-15 15:18       ` Jakub Jelinek
2023-03-16  8:57         ` Raiki Tamura
2023-03-16  9:28         ` Thomas Schwinge
2023-03-16 12:58           ` Mark Wielaard [this message]
2023-03-16 13:07             ` Jakub Jelinek
2023-03-18  8:31             ` Raiki Tamura
2023-03-18  8:47               ` Jonathan Wakely
2023-03-18  8:59                 ` Raiki Tamura
2023-03-18  9:28                   ` Jakub Jelinek
2023-03-20 10:19                     ` Raiki Tamura
2023-03-31 10:27 [GSoC] gccrs Unicode Support E M

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