On Sep 15, 6:40     
> though properties of regexp under Linux is OK,ruby under windows doesn't
> support that.
> such as /\p{Han}/,
> you will always get an error.
>
> irb(main):001:0> /\p{Han}/
> SyntaxError: (irb):1: invalid character property name {Han}: /\p{Han}/
> from C:/Ruby192/bin/irb:12:in `<main>'
>
> will anyone explain this?
>
> i use ruby 1.9.2p0 (2010-08-18) [i386-mingw32]

That seems a bug.

Ruby Regexp is bundled by Ruby, not depending on 3rd party libraries
that could have affected it's compilation

If no other answer shows up that explain this, please create a bug
report in Ruby Redmine installation:

http://redmine.ruby-lang.org/

And provide enough information about your setup, specially if you
compiled Ruby or downloaded binaries.

--
Luis Lavena