Help: What's happening here?

Help: What's happening here?

[chris.danx]

Hi,

Curiously this code doesn't work.  GNAT spit's out the error "ces" not
declared in "unicode", but it is, since the "withs" work ok.  It's just when
it's renamed or used...

e.g.
    unicode.ces.basic_8bit.to_utf32 (blah)

doesn't work when i compile it!  Nor does a renaming like below...


The package body looks like this (playing with XML/Ada)

with unicode.ces;
with unicode.ces.basic_8bit;

package body preferences.conversions.unicode is

   package basic_8bt renames unicode.ces.basic_8bit;

   -- takes a latin1 string and converts it to a
   -- unicode encoded (utf16) string;
   --
   function to_unicode_string (str : in string)
      return utf16_string is
   begin
      return str;    -- temp! Must fix
   end to_unicode_string;

    ...

end preferences.conversions.unicode;

and just in case the spec

with unicode.ces.utf16;
use unicode.ces.utf16;

package preferences.conversions.unicode is

   -- takes a latin1 string and converts it to a
   -- unicode encoded (utf16) string;
   --
   function to_unicode_string (str : in string)
      return utf16_string;

    ...

end preferences.conversions.unicode;

There's obviouly a rule of some sort I'm not familiar with, could someone
please enlighten me?

Thanks,
Chris

Re: Help: What's happening here?

[Emmanuel Briot]

"chris.danx" <chris.danx@ntlworld.com> writes:
> The package body looks like this (playing with XML/Ada)
> 
> with unicode.ces;
> with unicode.ces.basic_8bit;
> 
> package body preferences.conversions.unicode is
> 
>    package basic_8bt renames unicode.ces.basic_8bit;  <<<<<<<
> 
>    -- takes a latin1 string and converts it to a
>    -- unicode encoded (utf16) string;
>    --
>    function to_unicode_string (str : in string)
>       return utf16_string is
>    begin
>       return str;    -- temp! Must fix
>    end to_unicode_string;


The unicode package that GNAT see on the <<<<< line is the package
Preferences.Conversions.Unicode, not the one from XML/Ada.
You have to use something like


   package basic_8bt renames standard.unicode.ces.basic_8bit;

if you want to access XML/Ada.

Emmanuel

Re: Help: What's happening here?

[chris.danx]

>
> The unicode package that GNAT see on the <<<<< line is the package
> Preferences.Conversions.Unicode, not the one from XML/Ada.
> You have to use something like
>
>    package basic_8bt renames standard.unicode.ces.basic_8bit;
>
> if you want to access XML/Ada.

Thanks,
Chris

>
> Emmanuel