Characters in D
lecom at yandex.ru
Sat Nov 2 18:45:50 UTC 2019
On Saturday, 2 November 2019 at 18:26:57 UTC, user4567 wrote:
> On Saturday, 2 November 2019 at 18:09:01 UTC, Eugene wrote:
>> On Saturday, 2 November 2019 at 15:54:02 UTC, Adam D. Ruppe
>>> On Saturday, 2 November 2019 at 15:44:49 UTC, Eugene wrote:
>>>> "Variable of type char can only hold letters that are in the
>>>> ASCII table". (section 15.4 Character literals)
>>>> So why there is executed next code?
>>> The individual char can only hold those, but a group of chars
>>> can hold anything.
>>>> char cyrillics = "привет".dup;
>>> this works because the "string" has multi-char groupings
>>>> char cyrillics = ['п', 'р', 'и', 'в', 'е', 'т']; //not
>>> and this doesn't because you are specifying individual items
>>> there so it can't just spread them across multiple bytes
>> Um. It is not obvious at all. What's mean spread across
>> multiple bytes?
> it's encoded in UTF-8, for example the **string** "п" takes 2
> `char`s, although it's only one grapheme.
> assert("привет".length == 12); // encoded as UTF-8
> assert("привет"d.length == 6); // decoded, each dchar is 4
> bytes and can contain a cyrilic character.
"п" is represented by two code units, but "п"d is represented by
one code point, therefore 12 and 6 respectively. Function dup
manipulates by code units and represents their to char. So?
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