[cfe-dev] UCNs/extended characters revisitted

Neil Booth neil at daikokuya.co.uk
Tue Jul 14 07:40:06 PDT 2009

Chris Lattner wrote:-

> Adding a 2.5M database to clang sounds like a non-starter.  When we  
> actually care enough about this, hopefully there will be a better way to 
> go.  Neil, do you know of a good way to do this sort of check?

That would indeed be insane.  I don't see anything wrong with GCC's
approach.  You need three states, not two: invalid in identifiers,
invalid at the start of identifiers, and valid in identifiers.  There
are different rules for C and C++.  This is hardly performance
critical code; a binary lookup should suffice.


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