[cfe-dev] Macro expansion weirdness (or bug?)

[Chris Lattner]

On Mar 25, 2010, at 4:32 PM, Abramo Bagnara wrote:

> Il 25/03/2010 20:43, Chris Lattner ha scritto:
>> 
>> On Mar 25, 2010, at 12:08 PM, Abramo Bagnara wrote:
>> 
>>> 
>>> From your message it seems you're expecting *more* callback
>>> invocations in the first sample, while I'd expect *less* callback
>>> invocations in the second sample.
>>> 
>>> Could you explain better your position?
>> 
>> My position is basically that the preprocessor is incredibly
>> scary/confusing and implementing it damaged me.  :)
>> 
>> I don't recall enough of the details to really say which way is right
>> or wrong, but tokens coming out at -E is a good indicator that the
>> right thing is happening.
> 
> Indeed it was missing further expansion disabling in a case where
> isTrivialSingleTokenExpansion is true.

Please provide a testcase that this fixes with -E.

-Chris

> 
> Please apply.
> 
> -- 
> Abramo Bagnara
> 
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> <PPMacroExpansion.patch>