Iteration on UTF/UNICODE characters

[Iain Buclaw]

On 11 September 2018 at 12:17, Danny Arends via D.gnu
<d.gnu at puremagic.com> wrote:
> On Tuesday, 11 September 2018 at 09:32:51 UTC, Eugene Wissner wrote:
>>
>> On Tuesday, 11 September 2018 at 08:54:33 UTC, Danny Arends wrote:
>>>
>>> Hey all,
>>>
>>> I am building a font glyph atlas for 2D and 3D rendering using the
>>> following code:
>>>
>>> dchar c = '\u0000';
>>> while (c <= '\U0000FFFF') {
>>>   if(isValidDchar(c)){
>>>     # Code working on the char
>>>   }
>>> }
>>>
>>> This compiles, and works as expected using DMD, and LDC2.
>>>
>>> However when I try and build the code using GDC, it gives me the
>>> following error:
>>>
>>> src/font.d:95:15: error: invalid UTF character \U0000FFFF
>>>
>>> Any thoughts on why this is happening in GDC, since it works in DMD and
>>> LDC2 ?
>>> And any idea how to fix this ?
>>>
>>> Kind regards,
>>> Danny
>>
>>
>> What GDC version?
>>
>> void main()
>> {
>>     dchar c = '\u0000';
>>     while (c <= '\U0000FFFF') {
>>     }
>> }
>>
>> compiles here with gdc (GDC 2.081.2) 8.2.0
>
>
> I am using the GDC2 compiler from the Ubuntu Repository (I guess this is a
> really old version of gdc)
>
> gdc --version
>
>   gdc (Ubuntu 5.4.0-6ubuntu1~16.04.10) 5.4.0 20160609
>
> Guess I will have to manually install the latest version, I was hoping to be
> able to use the version in the Ubuntu packages, to have the requirements for
> the program be:
>
> apt install gdc
>
> I will try to use the newest version, see if it can compile the code
>

gcc-5 is nearly 4 years old!

You'd probably have better luck switching to the current LTS release
of Ubuntu, which installs gcc-7 by default, which is a reasonable
version to start from.