[cfe-dev] unicode identifiers

[Scott Conger]

Ahh, never mind. I'm told my Windows example was totally bogus and
that that only applies for ordinal values.

Still, I think you'll have to see what constraints exist on different platforms.

-Scott

On Tue, Jun 21, 2011 at 1:21 PM, Scott Conger <scott.conger at gmail.com> wrote:
> I'm afraid the parsing of the text is the smaller part of the problem.
> I've only looked into this briefly, but it was enough to realize
> you're going to run into platform specific linking/tool issues.
>
> Windows, for example, normally takes any UTF-16 string in functions
> that take strings as input, but in the documentation of GetProcAddress
> it says this:
>
> lpProcName [in]
>
>    The function or variable name, or the function's ordinal value. If
> this parameter is an ordinal value, it must be in the low-order word;
> the high-order word must be zero.
>
> Essentially, they constrained the character set of identifier names to
> the basic ASCII characters. You probably won't be able to get a
> library with unicode characters to link. Even then, LLVM would need
> the brains to convert the UTF-8 string to UTF-16, which Windows
> normally expects.
>
> As far as I could tell, you would need to go platform by platform and
> see if they demanded any special rules for identifiers in executables
> and libraries. Unfortunately, most of them seem to say nothing
> explicit about it in the documentation.
>
> The last time I checked gcc required use of -fextended-identifiers,
> which was marked as experimental.
>
> -Scott
>
> 2011/6/21 Jochen Wilhelmy <j.wilhelmy at arcor.de>:
>>
>>> Just attach the patch to your email so it can be reviewed here.
>>
>> here you are. of course this influences the AsmWriter in llvm if
>> it sees characters with the high bit set, for example I would not use
>> the locale dependent function isalnum()
>>
>> -Jochen
>>
>>
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