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Re: [libcpp] patch: add used callback

Arnaud Charlet wrote: 
Index: include/cpplib.h
===================================================================
--- include/cpplib.h    (revision 153897)
+++ include/cpplib.h    (working copy)
@@ -508,6 +508,10 @@ struct cpp_callbacks
   /* Called before #define and #undef or other macro definition
      changes are processed.  */
   void (*before_define) (cpp_reader *);
+  /* Called whenever a macro is expanded or tested.
+     Note: this callback is not called when a #define/#undef directive is
+     processed, consider used_define or used_undef instead.  */
+  void (*used) (cpp_reader *, unsigned int, cpp_hashnode *);

Then please document a little bit more the role of the 2 last arguments in your comment.

Regards.


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