root [0] .L MyMacro.cxx++
Info in <TUnixSystem::ACLiC>: creating shared library /Users/Patrick/my_snoplus/root_macros/./MyMacro_cxx.so
Error: Variable name has bad character 'd{-3}' MyStruct.h:11:
Internal warning: d{-3} comment can not set MyStruct.h:11:
Warning: Error occurred during reading source files
Warning: Error occurred during dictionary source generation
!!!Removing /Users/Patrick/my_snoplus/root_macros/MyMacro_cxx_ACLiC_dict.cxx /Users/Patrick/my_snoplus/root_macros/MyMacro_cxx_ACLiC_dict.h !!!
Error: /Users/Patrick/Root/bin/rootcint: error loading headers...
Error in <ACLiC>: Dictionary generation failed!
Info in <ACLiC>: Invoking compiler to check macro's validity
Info in <ACLiC>: The compiler has not found any problem with your macro.
    Probably your macro uses something rootcint can't parse.
    Check http://root.cern.ch/viewvc/trunk/cint/doc/limitati.txt for Cint's limitations.