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Groups > comp.lang.c++ > #67771
| From | Bo Persson <bo@bo-persson.se> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | Re: How to get standard paths?!? |
| Date | 2019-08-19 00:04 +0200 |
| Message-ID | <gru0b4Ff9p7U1@mid.individual.net> (permalink) |
| References | (16 earlier) <qjb63k$4u7$2@dont-email.me> <qjbav1$uap$1@news.albasani.net> <7cb6F.89442$GfB1.45648@fx36.am4> <grtk07Fcnh9U1@mid.individual.net> <r%h6F.22023$Jh2.12734@fx39.am4> |
On 2019-08-18 at 21:51, Bart wrote:
> On 18/08/2019 19:33, Bo Persson wrote:
>> On 2019-08-18 at 14:07, Bart wrote:
>>> On 18/08/2019 11:57, Bonita Montero wrote:
>>>>>> Unicode is defined to have a maximum of 21 bit codepoints.
>>>>
>>>>> Yes. And how to you fit those 21 bits into a 16-bit wchar_t ?
>>>>
>>>> That's not necessary if you use UTF-16.
>>>>
>>>
>>>
>>> Show me how to make use of UTF-16 here, because it doesn't seem to
>>> work on Windows:
>>>
>>> #include <wchar_t>
>>>
>>> wchar_t c;
>>> c = 1000000; // character code 1000000
>>>
>>> printf("c = %d 0x%X", c, c);
>>>
>>> Displays:
>>>
>>> c = 16960 0x4240
>>>
>>> Not this:
>>>
>>> c = 1000000 0xF4240
>>
>> So we can only guess that this character code is not part of the
>> "supported locale" used in your program.
>>
>> Nowhere does the language standard require C++ to support all
>> available OS locales. It could be a very small subset.
>
> A small subset where none of the locale's alphabets has character codes
> above 65535.
Yes, that would conform to the C++ standard.
>
> Anyway, the locale need have nothing to do with the ability to be able
> to read, write or process arbitrary Unicode characters and strings.
Neither does wchar_t. The C++ standard only says:
"The values of type wchar_t can represent distinct codes for all members
of the largest extended character set specified among the supported
locales."
And then it is up to the implementation to define what locales that
could be.
>
> Otherwise countries such as the UK and US could get by with just ASCII.
>
> But if they are going beyond a 7-bit character, then why not beyond
> 16-bit too? Actually, the first few alphabets beyond codepoint 65535
> appear to be ancient scripts with no meaningful locale anyway.
VC++ also offers non-standard use of UTF-16, should you need to use
those characters anyway. But that is an extension, and not standard C++.
This is kind of similar to some compilers allowing the use of integer
types larger that intmax_t, by calling __int128 an extension (and not
"an extended integer type").
Bo Persson
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How to get standard paths?!? Szyk Cech <szykcech@spoko.pl> - 2019-08-17 13:58 +0200
Re: How to get standard paths?!? "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2019-08-17 14:02 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-17 14:05 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-17 15:11 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-17 15:59 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-17 16:20 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-17 16:28 +0200
Re: How to get standard paths?!? Ralf Goertz <me@myprovider.invalid> - 2019-08-17 16:37 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-17 16:54 +0200
Re: How to get standard paths?!? Paavo Helde <myfirstname@osa.pri.ee> - 2019-08-17 18:37 +0300
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-17 17:54 +0200
Re: How to get standard paths?!? Paavo Helde <myfirstname@osa.pri.ee> - 2019-08-17 19:55 +0300
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-17 19:15 +0200
Re: How to get standard paths?!? Paavo Helde <myfirstname@osa.pri.ee> - 2019-08-17 20:39 +0300
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-17 19:44 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-17 20:10 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-18 08:58 +0200
Re: How to get standard paths?!? Bart <bc@freeuk.com> - 2019-08-18 10:16 +0100
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-18 11:27 +0200
Re: How to get standard paths?!? Bo Persson <bo@bo-persson.se> - 2019-08-17 21:07 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-17 21:41 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-17 17:40 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-17 17:52 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-17 18:00 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-17 18:01 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-17 18:26 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-17 20:20 +0200
Re: How to get standard paths?!? Keith Thompson <kst-u@mib.org> - 2019-08-17 16:33 -0700
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-18 11:34 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-18 08:48 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-18 11:34 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-18 12:57 +0200
Re: How to get standard paths?!? Bart <bc@freeuk.com> - 2019-08-18 13:07 +0100
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-18 15:49 +0200
Re: How to get standard paths?!? Bo Persson <bo@bo-persson.se> - 2019-08-18 20:33 +0200
Re: How to get standard paths?!? Bart <bc@freeuk.com> - 2019-08-18 20:51 +0100
Re: How to get standard paths?!? Bo Persson <bo@bo-persson.se> - 2019-08-19 00:04 +0200
Re: How to get standard paths?!? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2019-08-25 05:35 -0700
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-25 15:02 +0200
Re: How to get standard paths?!? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2019-08-25 06:38 -0700
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-25 15:46 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-25 15:54 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-19 08:52 +0200
Re: How to get standard paths?!? "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2019-08-19 09:32 +0200
Re: How to get standard paths?!? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2019-08-22 12:37 -0700
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-19 10:26 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-17 18:00 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-17 18:06 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-17 20:24 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-18 08:49 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-18 11:46 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-18 12:59 +0200
Re: How to get standard paths?!? scott@slp53.sl.home (Scott Lurndal) - 2019-08-18 15:40 +0000
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-18 17:44 +0200
Re: How to get standard paths?!? scott@slp53.sl.home (Scott Lurndal) - 2019-08-18 15:38 +0000
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-18 17:46 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-17 17:56 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-17 18:05 +0200
Re: How to get standard paths?!? Hergen Lehmann <hlehmann.expires.5-11@snafu.de> - 2019-08-17 19:47 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-17 20:46 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-18 08:54 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-18 12:07 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-18 13:05 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-18 14:48 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-18 15:51 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-18 16:43 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-18 17:02 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-17 20:41 +0200
Re: How to get standard paths?!? Keith Thompson <kst-u@mib.org> - 2019-08-17 16:46 -0700
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-18 12:22 +0200
Re: How to get standard paths?!? Robert Wessel <robertwessel2@yahoo.com> - 2019-08-17 22:57 -0500
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-18 08:57 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-18 12:24 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-18 13:07 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-18 13:13 +0200
Re: How to get standard paths?!? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2019-08-17 11:22 -0700
Re: How to get standard paths?!? Bo Persson <bo@bo-persson.se> - 2019-08-17 21:21 +0200
Re: How to get standard paths?!? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2019-08-17 22:25 -0700
Re: How to get standard paths?!? Robert Wessel <robertwessel2@yahoo.com> - 2019-08-19 01:19 -0500
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-19 08:25 +0200
Re: How to get standard paths?!? Bonita Montero <Bonita.Montero@gmail.com> - 2019-08-17 14:02 +0200
Re: How to get standard paths?!? David Brown <david.brown@hesbynett.no> - 2019-08-17 15:13 +0200
Re: How to get standard paths?!? Sam <sam@email-scan.com> - 2019-08-17 09:21 -0400
Re: How to get standard paths?!? Jorgen Grahn <grahn+nntp@snipabacken.se> - 2019-08-19 20:57 +0000
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