Re: [elpa] 02/04: company-clang: handle multibyte chars between bol and point

[Dmitry Gutov <dgutov@yandex.ru>]

On 20.03.2014 05:58, Eli Zaretskii wrote:

> Please tell the details: what does "don't work" mean?

It means that Clang returns a wrong list of completions.

Take this test file, for example:

===
typedef struct test_s {
   int num_a;
   long num_b;
   char c;
} test_t;

int main(int args, char *argv[]) {
   test_t tt;
   /*ыыы*/tt.;
   return 0;
}
===

Put point after `.', type `M-x company-clang'. The list of completions 
should include 3 items, from the struct test_t.

"Doesn't work" usually means that it returns a different, much longer 
list. So, with the above file saved in UTF-8, either approach works. But 
when it's in UTF-16, only the current one succeeds.

> The question is not what Clang uses, the question is how does it
> expect the offsets to be supplied for files encoded in different
> encodings.  That is something that should be described in the Clang
> manuals.

Either it isn't, or I don't know what to search for.

 > I assumed that it needs offsets in bytes, but that
> assumption was not based on anything except looking at your code.

The docstring for the relevant function 
(http://clang.llvm.org/doxygen/group__CINDEX__CODE__COMPLET.html#ga50fedfa85d8d1517363952f2e10aa3bf) 
says "column", but apparently it has a special notion of columns. For 
example, it considers any tab character as taking only one column.