[luatex] problem with slnunicode's find

[luigi scarso]

On Wed, Mar 3, 2010 at 11:38 AM, Manuel Pégourié-Gonnard <mpg at elzevir.fr> wrote:
> luigi scarso a écrit :
>> On Wed, Mar 3, 2010 at 10:19 AM, Manuel Pégourié-Gonnard <mpg at elzevir.fr> wrote:
>>> function find_utf8_chars(str, pat)
>>>    local a, b = unicode.utf8.find(str, pat)
>>>    a = unicode.utf8.len(string.sub(str, 1, a))
>>>    b = unicode.utf8.len(string.sub(str, 1, b))
>>>    return a, b
>>> end
>> For example here I disagree  because you mix string and unicode.utf8
>> --- but it's my first look, I should check.


>
> I think you should :-)
As I wrote, can be the only way . I would like something like this
--
--  this example can be totally wrong
--  it's just to show what I would like to see
--
 function find_utf8_chars(str, pat)
   local a, b = unicode.utf8.find(str, pat)
    a = unicode.utf8.len(unicode.utf8.sub(str, 1, a))
    b = unicode.utf8.len(unicode.utf8.sub(str, 1, b))
   return a, b
end

If not possible , well you have hide details in your function
and it's also from ok a user point of view .


> By the way, that's the whole point of the discussion: unicode.utf8.find returns
> values with byte semantics...
It's not a problem anymore.
We all know now, and there is also a function that solves some problems.


-- 
luigi