Re: strange behaviour of utf-8 files

[Stoik <staszek.goldstein@gmail.com>]

W dniu sobota, 16 listopada 2013 18:01:07 UTC+1 użytkownik Georg Bauhaus napisał:
> On 16.11.13 16:09, Stoik wrote:
> 
> 
> 
> > Thanks for the answer. Your advice is certainly sound, but not very satisfactory. The whole purpose of utf-8 is to make
> 
> > things portable across platforms. If the compiler cannot deal properly with the
> 
> > source code written in the utf-8 encoding, then the whole effort that went into
> 
> > all the wide_ and wide_wide_ packages and the new packages that deal with various encodings is lost (all the Latin-x possibilities are useless anyway, at least on Windows platform). I am adjoining a trivial program which works differently according to the encoding (UTF-8 or ISO-8859-1) of the source code, printing 1 or 2 as the answer.
> 
> >
> 
> > with ada.text_io; use ada.text_io;
> 
> > procedure example is
> 
> >     S : String := "ó";
> 
> > begin
> 
> >     Put_Line (S'Length'Img);
> 
> > end;
> 
> 
> 
> GNAT has two switches that affect its way of looking at
> 
> coded characters in source text:
> 
> 
> 
> for identifiers in source text, specify -gnatiC
> 
>   where C is one of the characters listed 3.2.10
> 
>   of the GNAT UG accompanying the compiler;
> 
> 
> 
> for the wide character encoding method, specify -gnatWE
> 
>   where E is one of the characters listed in the
> 
>   same document.
> 
> 
> 
> With switch -gnatW8, I get
> 
> 
> 
> $ ./example
> 
>   1
> 
> $
> 
> 
> 
> That is, the source text is understood to be encoded
> 
> in UTF-8, and 'ó' becomes Character'Val (243), viz. LC_O_Acute.

Thank you for solving the problem, by mistake I have thanked another auther first.