c++ - qt preprocessor -

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what order of compiling in qt? understood impossible write 

  #define begin_signals signals:

is way make conditional compilation using

 #ifdef qt signals: #endif

just tested , 

#define begin_signals signals:

does work expected since moc preprocessing well.
order of compilation qobject class myqobject - 

start moc myqobject.h    moc run c preprocessor    moc produces moc_myobject.cpp file moc_myobject.cpp compiled native compiler

myqobject.cpp compiled native compiler before or after this.

be mindful word signals macro translates protected when native compiler used. i'm not sure why ever want define begin_signals


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