Actually the 1.8 parser is somewhat influenced by the current $KCODE. 
Multi-byte characters could be part of identifiers and also the decision of 
where a string literal ends needs to deal with multi-byte characters.
However, the resulting literals are just plain byte arrays with no knowledge of 
encoding so String#size method is still broken.

To achieve a better .NET interop in IronRuby, we will honor KCODE when creating 
MutableStrings. The representation of the string will be byte[] if it contains 
any non-ascii characters and KCODE is set to a non-ascii encoding. We will also 
attach the KCODE encoding to the MutableString at creation time. This doesn’t 
affect Ruby 1.8 functionality, it only affects conversions to CLR string. So if 
you use KCODE = “U” the CLR strings should be correctly encoded (they are not 
now as you are experiencing). I’ll implement this feature as soon as possible.

Tomas

From: [email protected] 
[mailto:[email protected]] On Behalf Of Tomas Matousek
Sent: Tuesday, March 03, 2009 10:36 AM
To: [email protected]
Subject: Re: [Ironruby-core] Issue with accents (UTF-8) - is it supposed to 
work ?

If I run this in Ruby 1.8.6:

> ruby –Ku uni.rb

And uni.rb is UTF-8 encoded w/o BOM:

puts $KCODE
puts 'hèllo'.size

I’ll get output:
UTF-8
6

So that clearly doesn’t work as one might expect. String literals in MRI 1.8 
are always binary (ie. the accented character is stored as any other 2 bytes in 
the string).
AFAIK $KCODE only affects some built-in and library methods – for example 
String#inspect, regular expression, conversion libraries, etc.

Although IronRuby stores string literals in UTF16 .NET strings, to be fully 
compatible with MRI 1.8 we use a custom BinaryEncoding for these strings. When 
a string is converted to an array of bytes using this encoding, only 8 bits of 
each character are used (the other bits are required to be 0). This works fine 
for encodings that use a single byte per character. It’s broken for multi-byte 
encodings but that’s a problem with Ruby 1.8 in general.

If you want to use Unicode you should not use 1.8 semantics. You should use -19 
switch to run your script in 1.9 mode and either add a UTF8 BOM preamble or 
Ruby encoding magic comment:

#encoding: UTF-8
puts 'hèllo'.size

> ruby19 uni.rb
5

> ir.exe -19 uni.rb
5

In a hosted app you can set 1.9 compat mode when creating the 
ScriptEngine/Runtime:

var ruby = IronRuby.Ruby.CreateEngine((setup) => {
   setup.Options["Compatibility"] = RubyCompatibility.Ruby19
});

Tomas

From: [email protected] 
[mailto:[email protected]] On Behalf Of Tomas Matousek
Sent: Tuesday, March 03, 2009 9:56 AM
To: [email protected]
Subject: Re: [Ironruby-core] Issue with accents (UTF-8) - is it supposed to 
work ?

I’ll take a look.

Tomas

From: [email protected] 
[mailto:[email protected]] On Behalf Of Ivan Porto Carrero
Sent: Tuesday, March 03, 2009 6:58 AM
To: [email protected]
Subject: Re: [Ironruby-core] Issue with accents (UTF-8) - is it supposed to 
work ?

No not a mono related issue. I get the same results when i run your sample on 
windows with MS.NET<http://MS.NET>
It must be an encoding thing. When I set the $KCODE to "UTF-8" it still has the 
same behavior which is weird I guess :)
On Tue, Mar 3, 2009 at 3:35 PM, Thibaut Barrère 
<[email protected]<mailto:[email protected]>> wrote:
Hi,

> not sure if it's an oddity in my code, a bug or non-implemented feature in
> IronRuby or Mono - so I'm reporting it here. When using accents inside
> strings ("Barrère") that I pass to either buttons or datagridviews, they
> translate into "BarrA¨re". Here's a sample (also available on github):
Bumping this one - do you have some idea of what's happening there ?
Is it a mono related issue ?

-- Thibaut

> Hi,
> not sure if it's an oddity in my code, a bug or non-implemented feature in
> IronRuby or Mono - so I'm reporting it here. When using accents inside
> strings ("Barrère") that I pass to either buttons or datagridviews, they
> translate into "BarrA¨re". Here's a sample (also available on github):
>
> form = Magic.build do
>   form(:text => "DataGridView sample", :width => 800, :height => 600) do
>     # nifty - current Magic.build makes it possible to reuse the control
> that has been added
>     @grid = data_grid_view :dock => DockStyle.fill
>     @grid.column_count = 2
>     @grid.columns[0].name = "First name"
>     @grid.columns[1].name = "Last name"
>
>     @grid.rows.add("Thibaut","Barrère") # using my name with its nasty
> accent - utf-8 ?
>   end
> end
>
> After editing the datagridview, I noticed a log on stdout from mono:
> 009-03-01 11:48:36.927 mono[5512:10b] WARNING:
> CFSTR("Barr\37777777703\37777777603\37777777702\37777777650re") has non-7
> bit chars, interpreting using MacOS Roman encoding for now, but this will
> change. Please eliminate usages of non-7 bit chars (including escaped
> characters above \177 octal) in CFSTR().
> So I guess the issue probably boils down to non-MacOS Roman support in Mono.
> What do you think ?
> -- Thibaut
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