prime_gen.h:5:  private: should be indented +1 space inside class PrimeNumberGenerator  [whitespace/indent] [3]
prime_gen.h:8:  public: should be indented +1 space inside class PrimeNumberGenerator  [whitespace/indent] [3]
prime_gen.h:9:  Single-parameter constructors should be marked explicit.  [runtime/explicit] [5]
prime_gen.h:19:  Missing space before ( in while(  [whitespace/parens] [5]
Done processing prime_gen.h
Total errors found: 4