cet-is » messagefacility

The following code in larsoftalg produces an error when compiled against messagefacility v2_02_01.

LOG_DEBUG("Geometry") << "detector total  volume is " << fTotalVolume->GetName();

The debug build is fine, but the prof build reports this error.

[ 64%] Building CXX object larcorealg/larcorealg/Geometry/CMakeFiles/larcorealg_Geometry.dir/AuxDetGeo.cxx.o
/home/garren/scratch/larsoft/v06_75_00_01/srcs/larcorealg/larcorealg/Geometry/AuxDetGeo.cxx: In constructor ‘geo::AuxDetGeo::AuxDetGeo(std::vector<const TGeoNode*>&, int)’:
/home/garren/scratch/larsoft/v06_75_00_01/srcs/larcorealg/larcorealg/Geometry/AuxDetGeo.cxx:41:59: error: no match for ‘operator<<’ (operand types are ‘mf::NeverLogger_’ and ‘const char*’)
     LOG_DEBUG("Geometry") << "detector total  volume is " << fTotalVolume->GetName();

In file included from /home/garren/scratch/larsoft/v06_75_00_01/srcs/larcorealg/larcorealg/Geometry/AuxDetGeo.cxx:19:0:
/products/messagefacility/v2_02_01/include/messagefacility/MessageLogger/MessageLogger.h:92:5: note: candidate: template<class T> std::enable_if_t<((! std::is_same<T, const char*>::value) && (! std::is_same<T, const char* const>::value)), mf::NeverLogger_&> mf::NeverLogger_::operator<<(const T&) &
     operator<<(T const&) &
     ^~~~~~~~
/products/messagefacility/v2_02_01/include/messagefacility/MessageLogger/MessageLogger.h:92:5: note:   template argument deduction/substitution failed:
/products/messagefacility/v2_02_01/include/messagefacility/MessageLogger/MessageLogger.h:102:5: note: candidate: template<class T> std::enable_if_t<((! std::is_same<T, const char*>::value) && (! std::is_same<T, const char* const>::value)), mf::NeverLogger_&&> mf::NeverLogger_::operator<<(const T&) &&
     operator<<(T const&) &&
     ^~~~~~~~
....

Although a workaround is possible, we request that this bug be fixed since the workaround changes the behavior. Here is the workaround, which may also be needed for other messagefacility macros.

//LOG_DEBUG("Geometry") << "detector total  volume is " << fTotalVolume->GetName();
mf::LogDebug("Geometry") << "detector total  volume is " << fTotalVolume->GetName();