[cfe-dev] Adding MacroUndefined() to PPCallbacks

[Chris Lattner]

On Apr 20, 2009, at 6:36 PM, Alexei Svitkine wrote:

> It is useful for users of the Preprocessor to know not only when a  
> macro is defined, but also when it gets #undef'd.
>
> The attached patch adds this as an additional PPCallbacks method.

looks great, applied!
http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20090420/015956.html

Thanks,

-Chris