visitor.h:4:  At least two spaces is best between code and comments  [whitespace/comments] [2]
visitor.h:4:  Should have a space between // and comment  [whitespace/comments] [4]
visitor.h:17:  private: should be indented +1 space inside class BfsVisitor  [whitespace/indent] [3]
visitor.h:22:  public: should be indented +1 space inside class BfsVisitor  [whitespace/indent] [3]
Done processing visitor.h
Total errors found: 4