set.h:4:  private: should be indented +1 space inside class Set  [whitespace/indent] [3]
set.h:6:  public: should be indented +1 space inside class Set  [whitespace/indent] [3]
set.h:6:  "public:" should be preceded by a blank line  [whitespace/blank_line] [3]
set.h:7:  Missing space before {  [whitespace/braces] [5]
set.h:7:  Single-parameter constructors should be marked explicit.  [runtime/explicit] [5]
set.h:10:  Missing space before {  [whitespace/braces] [5]
set.h:12:  Missing space before {  [whitespace/braces] [5]
set.h:14:  Missing space before {  [whitespace/braces] [5]
set.h:20:  Missing space before {  [whitespace/braces] [5]
set.h:25:  Missing space before {  [whitespace/braces] [5]
set.h:26:  Missing space before {  [whitespace/braces] [5]
set.h:27:  Missing space before {  [whitespace/braces] [5]
set.h:34:  Missing space before {  [whitespace/braces] [5]
set.h:35:  Missing space before {  [whitespace/braces] [5]
set.h:36:  Missing space before {  [whitespace/braces] [5]
set.h:43:  Missing space before {  [whitespace/braces] [5]
set.h:44:  Missing space before {  [whitespace/braces] [5]
set.h:51:  Missing space before {  [whitespace/braces] [5]
set.h:53:  Missing space before {  [whitespace/braces] [5]
set.h:54:  Missing space before {  [whitespace/braces] [5]
set.h:61:  Missing space before {  [whitespace/braces] [5]
set.h:63:  Missing space before {  [whitespace/braces] [5]
set.h:64:  Missing space before {  [whitespace/braces] [5]
set.h:73:  Missing space before {  [whitespace/braces] [5]
set.h:74:  Missing space before {  [whitespace/braces] [5]
set.h:78:  Missing space before {  [whitespace/braces] [5]
set.h:79:  Missing space before {  [whitespace/braces] [5]
set.h:7:  Add #include <vector> for vector<>  [build/include_what_you_use] [4]
Done processing set.h
Total errors found: 28