Logging in FastCaloSim was implemented as an in build feature of the class
TFCSParametrizationBase. Specilaised logging is needed to facilitate compiling and running as a submodule of https://gitlab.cern.ch/atlas-simulation-fastcalosim/FCSParametrization
TFCSParametrizaionBase include the logging directly had become inconvenient. We wanted to develop classes that had no need to be derived from
TFCSParametrizationBase, but would want to do logging. We are quite sensitive to memory requirements. Including
TFCSParametrizationBase just for logging would be undesirable.
This is now implemented as a mixin class
MLogging.h. All inline, it's mostly macros.
Also added one macro
ATH_MSG_NOCLASS that will print things outside classes. If
ATH_MSG_NOCLASS("Hello world") is placed in the file
/my/example/long/file/path.cxx at line 123 it will print
le/long/file/path.cxx@123 NOCLASS Hello world
this allows us to print things from stand alone functions and static functions without resorting to direct