Re: PR cpp/7263 pragma system_header doesn't suppress warning on LL or ULL constants

[Chris Lattner <clattner at apple dot com>]

On Aug 13, 2008, at 12:45 PM, Tom Tromey wrote:

> > > > > > "Manuel" == Manuel López-Ibáñez <lopezibanez@gmail.com> writes:
>
> Manuel> One for the real location of the problem (the macro
> Manuel> definition) and another for the place where the macro was
> Manuel> instantiated. Then we can use those locations to check
> Manuel> cpp_inhibit_warnings_at from within cpp_error.
>
> Ideally I'd like to encode macro expansion history in a
> source_location.  This is more like a dream than a plan, though, since
> I have not tried to figure out exactly how to implement this encoding,
> or whether it can be done inexpensively enough.

Clang already tracks this in its preprocessor, and does so  
efficiently.  If you're interested, you can grab the source from http://clang.llvm.org/ 
 for ideas.

-Chris