Re: How to write wide char string literals?

From	James Kuyper <jameskuyper@alumni.caltech.edu>
Newsgroups	comp.lang.c++
Subject	Re: How to write wide char string literals?
Date	2021-07-03 08:44 -0400
Organization	A noiseless patient Spider
Message-ID	<sbpm41$thv$1@dont-email.me> (permalink)
References	(8 earlier) <sbmul5$1vu5$1@gioia.aioe.org> <sbns4s$cfd$1@dont-email.me> <sboej7$scd$1@dont-email.me> <sbopvo$qt9$1@dont-email.me> <sbphpm$vh9$1@dont-email.me>

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On 7/3/21 7:31 AM, Alf P. Steinbach wrote:
> On 3 Jul 2021 06:44, James Kuyper wrote:
>> On 7/2/21 9:30 PM, Alf P. Steinbach wrote:
...
>>> It matters because if the compiler assumes wrong, and Visual C++
>>> defaults to assuming Windows ANSI when no other indication is present
>>> and it's not forced by options, then one gets incorrect literals.
>>
>> Even when u8, u or U prefixes are specified?
> 
> Yes. As an example, consider
> 
>      const auto& s = u"Blåbær, Mr. Watson.";

The comment that led to this sub-thread was specifically about the
usability of escape sequences to specify members of the extended
character set, and that's the only thing I was talking about. While that
string does contain such members, it contains not a single escape sequence.

...
>> OK - it had not occurred to me that he was trying to encode "©", since
>> that is not the right way to do so. In a sense, I suppose that's the
>> point you're making.
>> My point is that all ten of the following escape sequences should be
>> perfectly portable ways of specifying that same code point in each of
>> three Unicode encodings:
>>
>> UTF-8: u8"\u00A9\U000000A9"
>> UTF-16: u"\251\xA9\u00A9\U000000A9"
>> UTF-32: U"\251\xA9\u00A9\U000000A9"
>>
>> Do you know of any implementation which is non-conforming because it
>> misinterprets any of those escape sequences?
>   No, they should work. These escapes are an alternative solution to 
> Juha's problem. ...

They are the only solution that this sub-thread has been about.

> ... However, they lack readability and involve much more 
> work than necessary, so IMO the thing to do is to assert UTF-8.

Those are reasonable concerns. That the system's assumptions about the
source character set would prevent those escapes from working is not.

Thread

How to write wide char string literals? Juha Nieminen <nospam@thanks.invalid> - 2021-06-30 07:57 +0000
  Re: How to write wide char string literals? Kli-Kla-Klawitter <kliklaklawitter69@gmail.com> - 2021-06-30 10:05 +0200
    Re: How to write wide char string literals? Ralf Goertz <me@myprovider.invalid> - 2021-06-30 10:30 +0200
      Re: How to write wide char string literals? Kli-Kla-Klawitter <kliklaklawitter69@gmail.com> - 2021-06-30 12:37 +0200
        Re: How to write wide char string literals? Ralf Goertz <me@myprovider.invalid> - 2021-07-01 09:19 +0200
          Re: How to write wide char string literals? Kli-Kla-Klawitter <kliklaklawitter69@gmail.com> - 2021-07-01 11:10 +0200
            Re: How to write wide char string literals? Ralf Goertz <me@myprovider.invalid> - 2021-07-01 11:36 +0200
              Re: How to write wide char string literals? Kli-Kla-Klawitter <kliklaklawitter69@gmail.com> - 2021-07-01 16:17 +0200
                Re: How to write wide char string literals? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2021-07-01 10:13 -0700
                Re: How to write wide char string literals? Kli-Kla-Klawitter <kliklaklawitter69@gmail.com> - 2021-07-01 19:27 +0200
                Re: How to write wide char string literals? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2021-07-01 11:21 -0700
                Re: How to write wide char string literals? Real Troll <real.troll@trolls.com> - 2021-07-01 18:45 +0000
                Re: How to write wide char string literals? Kli-Kla-Klawitter <kliklaklawitter69@gmail.com> - 2021-07-02 10:03 +0200
              Re: How to write wide char string literals? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2021-07-02 02:31 -0700
                Re: How to write wide char string literals? MrSpud_oyCn@92wvlb1hltq4dhc.gov.uk - 2021-07-02 09:38 +0000
                Re: How to write wide char string literals? Paavo Helde <myfirstname@osa.pri.ee> - 2021-07-02 13:52 +0300
                Re: How to write wide char string literals? MrSpud_zg8yg@nx8574z6ey2rc0y563k5i2.net - 2021-07-02 12:53 +0000
                Re: How to write wide char string literals? "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2021-07-02 15:22 +0200
                Re: How to write wide char string literals? Paavo Helde <myfirstname@osa.pri.ee> - 2021-07-02 17:32 +0300
  Re: How to write wide char string literals? Ralf Goertz <me@myprovider.invalid> - 2021-06-30 10:08 +0200
  Re: How to write wide char string literals? MrSpud_r5j@ywn9entw2s.org - 2021-06-30 08:39 +0000
    Re: How to write wide char string literals? Juha Nieminen <nospam@thanks.invalid> - 2021-06-30 10:52 +0000
      Re: How to write wide char string literals? MrSpud_3u59h8@0c9tv3nddl090w2ynhm.gov - 2021-06-30 11:28 +0000
        Re: How to write wide char string literals? David Brown <david.brown@hesbynett.no> - 2021-06-30 14:01 +0200
  Re: How to write wide char string literals? "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2021-06-30 10:55 +0200
    Re: How to write wide char string literals? David Brown <david.brown@hesbynett.no> - 2021-06-30 11:23 +0200
  Re: How to write wide char string literals? Richard Damon <Richard@Damon-Family.org> - 2021-06-30 06:51 -0400
    Re: How to write wide char string literals? Juha Nieminen <nospam@thanks.invalid> - 2021-06-30 11:09 +0000
      Re: How to write wide char string literals? Richard Damon <Richard@Damon-Family.org> - 2021-06-30 07:35 -0400
  Re: How to write wide char string literals? Paavo Helde <myfirstname@osa.pri.ee> - 2021-06-30 14:03 +0300
    Re: How to write wide char string literals? Juha Nieminen <nospam@thanks.invalid> - 2021-06-30 11:13 +0000
      Re: How to write wide char string literals? Richard Damon <Richard@Damon-Family.org> - 2021-06-30 07:39 -0400
        Re: How to write wide char string literals? "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2021-06-30 13:50 +0200
          Re: How to write wide char string literals? James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-06-30 14:19 -0400
            Re: How to write wide char string literals? "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2021-07-01 13:31 +0200
        Re: How to write wide char string literals? Juha Nieminen <nospam@thanks.invalid> - 2021-07-01 04:42 +0000
          Re: How to write wide char string literals? James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-07-01 10:58 -0400
            Re: How to write wide char string literals? Juha Nieminen <nospam@thanks.invalid> - 2021-07-02 05:26 +0000
              Re: How to write wide char string literals? James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-07-02 01:44 -0400
                Re: How to write wide char string literals? Bo Persson <bo@bo-persson.se> - 2021-07-02 08:33 +0200
                Re: How to write wide char string literals? Juha Nieminen <nospam@thanks.invalid> - 2021-07-02 11:52 +0000
                Re: How to write wide char string literals? James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-07-02 16:15 -0400
                Re: How to write wide char string literals? "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2021-07-03 03:30 +0200
                Re: How to write wide char string literals? James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-07-03 00:44 -0400
                Re: How to write wide char string literals? "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2021-07-03 13:31 +0200
                Re: How to write wide char string literals? James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-07-03 08:44 -0400
                Re: How to write wide char string literals? "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2021-07-03 16:28 +0200
                Re: How to write wide char string literals? Richard Damon <Richard@Damon-Family.org> - 2021-07-03 11:48 -0400
                Re: How to write wide char string literals? James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-07-08 15:56 -0400
                Re: How to write wide char string literals? Juha Nieminen <nospam@thanks.invalid> - 2021-07-03 16:59 +0000
                Re: How to write wide char string literals? James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-07-03 17:49 -0400
                Re: How to write wide char string literals? Juha Nieminen <nospam@thanks.invalid> - 2021-07-08 08:11 +0000
                Re: How to write wide char string literals? James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-07-08 05:52 -0400
                Re: How to write wide char string literals? Juha Nieminen <nospam@thanks.invalid> - 2021-07-03 06:59 +0000
                Re: How to write wide char string literals? James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-07-03 09:03 -0400
                Re: How to write wide char string literals? Chris Vine <chris@cvine--nospam--.freeserve.co.uk> - 2021-07-03 14:23 +0100
                Re: How to write wide char string literals? Juha Nieminen <nospam@thanks.invalid> - 2021-07-03 17:06 +0000
                Re: How to write wide char string literals? Richard Damon <Richard@Damon-Family.org> - 2021-07-03 14:06 -0400
                Re: How to write wide char string literals? Juha Nieminen <nospam@thanks.invalid> - 2021-07-08 08:13 +0000
                Re: How to write wide char string literals? "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2021-07-02 15:37 +0200
      Re: How to write wide char string literals? Manfred <noname@add.invalid> - 2021-06-30 16:54 +0200
      Re: How to write wide char string literals? Paavo Helde <myfirstname@osa.pri.ee> - 2021-06-30 17:56 +0300
  Re: How to write wide char string literals? Öö Tiib <ootiib@hot.ee> - 2021-06-30 09:22 -0700
  Re: How to write wide char string literals? Christian Gollwitzer <auriocus@gmx.de> - 2021-07-01 07:19 +0200
    Re: How to write wide char string literals? David Brown <david.brown@hesbynett.no> - 2021-07-01 10:29 +0200
      Re: How to write wide char string literals? Juha Nieminen <nospam@thanks.invalid> - 2021-07-01 08:44 +0000
        Re: How to write wide char string literals? David Brown <david.brown@hesbynett.no> - 2021-07-01 12:58 +0200
      Re: How to write wide char string literals? Christian Gollwitzer <auriocus@gmx.de> - 2021-07-01 14:01 +0200
        Re: How to write wide char string literals? David Brown <david.brown@hesbynett.no> - 2021-07-01 14:57 +0200
    Re: How to write wide char string literals? Manfred <noname@add.invalid> - 2021-07-01 15:44 +0200

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