Hello All, I'm trying to figure out if it is possible to use the preprocessor library to generate a unique token for a given translational unit suitable for use in a variable definition. __FILE__ doesn't work for obvious reasons. The motivation is use the template below to generate a unique function scope static "verbosity" for each translation unit. The extern is necessary to give the non-type template par external linkage but also requires a unique variable name. thanks for any help. -Sean #define INIT_VERBOSITY extern const char BOOST_PP_CAT(file,UNIQUE_TOKEN)[] filename = __FILE__; #define VERBOSITY VerbosityLookup::get() template class VerbosityLookup { static int get() { static int verbosity = initialize(STR); return verbosity; } }