static
 PRUnichar get_find_in_set_filter( const char* set )
   {
     return (~PRUnichar(0)^~char(0)) | GetFindInSetFilter(set);
   }
 static
 char16_t get_find_in_set_filter( const char* set )
 {
     return (~char16_t(0)^~char(0)) | GetFindInSetFilter(set);
 }
 static
 PRUnichar get_find_in_set_filter( const PRUnichar* set )
   {
     return GetFindInSetFilter(set);
   }
 static
 char16_t get_find_in_set_filter( const char16_t* set )
 {
     return GetFindInSetFilter(set);
 }