[cfe-dev] clang and #if regions

[Paul Curtis]

Hi Benoit,

> Quoting "Paul Curtis" <plc at rowley.co.uk>:
> 
> > simple way to determine the source lines that were activated for
> > compilation by the C-preprocessor?  The complement of that, of
> course,
> > is the set of lines that did *not* make it through the C pre-
> processor.
> 
> I still did not had the time to experiment it, but you are probably
> searching for this:
> 
> http://clang.llvm.org/doxygen/classclang_1_1PPCallbacks.html
> 
> "This interface provides a way to observe the actions of the
> preprocessor as it does its thing. Clients can define their
> hooks here to implement preprocessor level tools."

This looks promising, but that means directly hooking into the underlying
clang classes rather than going through the insulating C API?  I was sort of
hoping for something that could just pop out of the woodwork, but if it
means I need to roll up my sleeves, then I guess it's time to do some
digging.  :-)

Regards,

--
Paul Curtis, Rowley Associates Ltd   http://www.rowley.co.uk
SolderCore arriving Winter 2010!   http://www.soldercore.com