関連ワード:  c++ static variable in static function    c++ static variable in static method    c++ static variable in static member function    c++ static variable in function initialization    c++ static variable in function thread safe    c++ static variable in function multithreading    c++ static variable in function multiple instances    c++ static variable in function initialization thread safe    c++ static variable in function lifetime    c++ static variable in template function  
結果 : c++ static variable in static function