Re: Why no Ada.Wide_Directories?

["Yannick Duchêne (Hibou57)" <yannick_duchene@yahoo.fr>]

Le Tue, 18 Oct 2011 06:54:22 +0200, ytomino <aghia05@gmail.com> a écrit:

> Excuse my digression.
>
> On Oct 18, 11:59 am, Yannick Duchêne (Hibou57)
> <yannick_duch...@yahoo.fr> wrote:
>> Eiffel had an implementation of UTF-8 string, which was different
>> than the default ASCII string, and ***you could not access bytes from  
>> it***
>
> (about ***)
>
> Really? I'm novice about Eiffel, but I think that accessing bytes of
> encoded string is worth. I can not believe it at once. So I did
> google.
> If you talk about UNICODE_STRING, it seems decoded from UTF-8 to code-
> points array (like Wide_Wide_String).
> http://www.maths.tcd.ie/~odunlain/eiffel/html/base/UNICODE_STRING.html
> If you talk about Eiffel.NET, it seems having byte_count and
> byte_item.
> http://www.eiffelroom.org/blog/peter_gummer/utf_8_unicode_in_eiffel_for_net

“Really?” Yes Ytomino ;) You obviously need to initialize it in some way,  
but until initialized, you can't access individuals bytes, and all indexes  
you pass to UNICODE_STRING methods, are character index, never byte index.

In the former link, just to a search using “-- Get ”, to search for basic  
accessors: you have two, one as a method, one as an operator (you will  
easily guess, the syntax is Ada inspired), and both expect a character  
index, not a byte index. You obviously have initializers and converters to  
and from other encoding, and methods to check if the actual content match  
some restricted Unicode range to avoid runtime error (defensive  
programming), but the main interface, accesses characters, not bytes at  
all.

It's a long time I did not write any Eiffel stuff. Thanks for the above  
link, was a pleasure to see :) (some days ago, some one else posted some  
stuff with Eiffel inside too)


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