[Bug preprocessor/9449] UCNs not recognized in identifiers (c++/c99)

["joseph at codesourcery dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From joseph at codesourcery dot com  2005-02-22 02:13 -------
Subject: Re:  UCNs not recognized in identifiers
 (c++/c99)

On Mon, 21 Feb 2005, zack at codesourcery dot com wrote:

> Standing policy is that all cases which provoke undefined behavior
> inside the preprocessor, except already-documented GNU extensions,
> shall produce hard errors.  I am tempted to make a partial exception

Which policy (cf. bug 14634) I agree with.  However, I don't think there 
should be any exception made.  The standards (C99 and C++03) are 
implementable as-is.  They have oddities; some of these may be suitable 
for submission as DRs, and if the committees fix them in a TC rather than 
a major new standard revision then we no longer need implement those 
oddities, but for now the standard says what it says.  The headings in C99 
Annex D are except for "Digits" irrelevant to the normative requirements; 
anything in "Digits" is a UCN for a digit, whether or not it appears 
elsewhere.  (C++03 corrected the typo in C++98 which was noted in C++ DR 
131.)  The C++ standard's heading "CJK Unified Ideographs" lists ranges 
which also include various presentations forms such as one of the Hebrew 
characters previously discussed, but these are genuine ranges of letters 
clearly deliberately included; just the heading is wrong.



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9449