prime_gen.h:28:  private: should be indented +1 space inside class PrimeNumberGenerator  [whitespace/indent] [3]
prime_gen.h:30:  public: should be indented +1 space inside class PrimeNumberGenerator  [whitespace/indent] [3]
prime_gen.h:33:  You don't need a ; after a }  [readability/braces] [4]
prime_gen.h:41:  You don't need a ; after a }  [readability/braces] [4]
prime_gen.h:40:  Line ends in whitespace.  Consider deleting these extra spaces.  [whitespace/end_of_line] [4]
prime_gen.h:42:  Could not find a newline character at the end of the file.  [whitespace/ending_newline] [5]
Done processing prime_gen.h
Total errors found: 6