[Bug c++/45333] Include macros in instantiation backtraces

["manu at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45333

Manuel LÃpez-IbÃÃez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2011-10-20
                 CC|                            |manu at gcc dot gnu.org
     Ever Confirmed|0                           |1

--- Comment #3 from Manuel LÃpez-IbÃÃez <manu at gcc dot gnu.org> 2011-10-20 08:32:40 UTC ---
With -ftrack-macro-expansion we get:

pr45333.cc: In instantiation of âvoid C<T>::set(int) [with T = S]â:
pr45333.cc:1:24:   required from here
pr45333.cc:15:21: error: no match for âoperator=â in â((C<S>*)this)->C<S>::t =
xâ
pr45333.cc:15:21: note: candidate is:
pr45333.cc:3:8: note: S& S::operator=(const S&)
pr45333.cc:3:8: note:   no known conversion for argument 1 from âintâ to âconst
S&â

So we can track the origin of the instantation to the macro definition, but
then we don't show where the macro is invoked from, which is shown without
-ftrack-macro-expansion. I think it should show both, like clang does:

pr45333.cc: In instantiation of âvoid C<T>::set(int) [with T = S]â:
pr45333.cc:1:19:   instantiated from macro ZERO
pr45333.cc:20:3:   required from here
pr45333.cc:15:21: error: no match for âoperator=â in â((C<S>*)this)->C<S>::t =
xâ
pr45333.cc:15:21: note: candidate is:
pr45333.cc:3:8: note: S& S::operator=(const S&)
pr45333.cc:3:8: note:   no known conversion for argument 1 from âintâ to âconst
S&â

Notice that in my ideal output, I also fixed the location given for the first
instantation to point to "set" (1:19) and not to the end of the line (1:24).