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From "Tony Wu" <wuyue...@gmail.com>
Subject [classlib][luni]difference between RI and ICU
Date Tue, 12 Sep 2006 06:21:18 GMT
I encounter a problem when implement isWhiteSpace(int) in j.l.Character.
There is a difference between RI and ICU.

RI spec says,

> It is a Unicode szpace character (SPACE_SEPARATOR, LINE_SEPARATOR, or
> PARAGRAPH_SEPARATOR) but is not also a non-breaking space ('\u00A0',
> '\u2007', '\u202F').

but ICU spec says,

> It is a Unicode space separator (category "Zs"), but is not a no-break
> space (\u00A0 or \u202F or \uFEFF).

RI excludes U+2007 however ICU excludes U+FEFF

And I looked up the definition of these 4 related characters on unicode.org:

> 00A0;NO-BREAK SPACE;Zs;0;CS;<noBreak> 0020;;;;N;NON-BREAKING SPACE;;;;
> 2007;FIGURE SPACE;Zs;0;WS;<noBreak> 0020;;;;N;;;;;
> 202F;NARROW NO-BREAK SPACE;Zs;0;CS;<noBreak> 0020;;;;N;;;;;

I consider it is a bug of ICU because the U+FEFF is not in category *Zs* as
ICU spec described. And I purposed to report that to ICU team.
Should I handle the U+2007 by ourselves to follow RI or just document this
problem in testcase?

Tony Wu
China Software Development Lab, IBM

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