Re: UCNs in identifiers

[Geoff Keating <geoffk at geoffk dot org>]

On 11/03/2005, at 9:45 PM, Neil Booth wrote:

> Geoffrey Keating wrote:-
>
> > Neil Booth <neil@daikokuya.co.uk> writes:
> >
> > > Geoffrey Keating wrote:-
> > >
> > > > +		cpp_error (pfile, CPP_DL_ERROR,
> > > > +			   "stringizing identifier containing UCN "
> > > > +			   "is supported only in C++");
> > >
> > > What's your justification for this diagnostic?
> >
> > As I said in the description of the patch,
>
> Uh, you just said you don't support it in C99.  But the requirements
> of C99 and C++ are identical.

You are right!  For some reason, I thought that C99 required the exact 
same spelling, so that \u00aA gets turned into "\\u00aA", but it 
actually says

> Otherwise, the original spelling of each preprocessing token in the 
> argument is retained in the character string literal, except for 
> special handling for producing the spelling of string literals and 
> character constants: a \ character is inserted before each " and \ 
> character of a character constant or string literal (including the 
> delimiting " characters), except that it is implementation-defined 
> whether a \ character is inserted before the \ character beginning a 
> universal character name.

So #\u00AA gets turned into "\u00AA".

Easily fixed...

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