cpplib: Preliminary implementation of UCNs

[Neil Booth]

Martin v. L?wis wrote:-

> >  This is because it's easy for -E output, and I'm not sure what we
> > want to do as far as mangling is concerned, and I don't think it's a
> > good idea to make \u00aa and \u00AA the same identifier, never mind
> > making it the same as the character itself.
> 
> That sounds incorrect. \u00aa and \u00AA *are* the same identifier.
> When you do
> 
> #define \u00aa 1
> #ifndef \u00AA
> #error FAILED
> #endif
> 
> you should not get a failure.

Yeah, I reluctantly came to the same conclusion in an earlier message
today.

Thanks,

Neil.