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

[zack at codesourcery dot com]

------- Additional Comments From zack at codesourcery dot com  2005-02-21 20:23 -------
Subject: Re:  UCNs not recognized in identifiers
 (c++/c99)

"geoffk at geoffk dot org" <gcc-bugzilla@gcc.gnu.org> writes:

>>> The second half would a pp-number, instead.  It is always true that
>>> splitting an identifier between characters yields two valid
>>> preprocessing tokens.
>>
>> It would not be a pp-number, as a UCN for a digit is still an
>> identifier-nondigit rather than a digit in terms of the syntax and
>> pp-numbers can't start with identifiers-nondigits.
>
> That's a defect in the standard, the tail of an identifier is supposed 
> to be either an identifier or a pp-number, that's why pp-number exists.

Arguably yes.  *shrug* You perhaps begin to see why I did not want
this feature implemented?  Or at least why I want it done with great
caution and consideration of all these corner cases?

Does your opinion of this particular corner case change in view of C++
not permitting most of the "digit" UCNs in identifiers at all?

zw


-- 


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