On Wed, Nov 6, 2013 at 2:43 AM, Steffen Daode <sdaoden_at_gmail.com> wrote:
> |TAB is "printable" (for the isprint() macro in standard C librries)
> because
> |it has a whitespace property, even if its general category is very weakly
>
> Nope according to POSIX, Vol. 1: Base Definitions, 7.3.1. LC_CTYPE ([1]):
>
> print
> Define characters to be classified as printable characters,
> including the <space>.
>
> In the POSIX locale, all characters in class graph shall be
> included; no characters in class cntrl shall be included.
>
> In a locale definition file, characters specified for the
> keywords upper, lower, alpha, digit, xdigit, punct, graph, and
> the <space> are automatically included in this class. No
> character specified for the keyword cntrl shall be specified.
>
There is a Unicode spec for these properties:
http://www.unicode.org/reports/tr18/#Compatibility_Properties
ICU should be implementing that, for example
[:print:]<http://unicode.org/cldr/utility/list-unicodeset.jsp?a=%5B%3Aprint%3A%5D&g=>
markus
Received on Wed Nov 06 2013 - 10:29:21 CST
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