50     Optional<unsigned> Column;  member
82                       Optional<unsigned> &Column, yaml::KeyValueNode &Node);
161                                   Optional<unsigned> &Column,  in parseDebugLoc()  argument
177       if (Error E = parseValue(Column, DLNode))  in parseDebugLoc()
188   if (!File || !Line || !Column)  in parseDebugLoc()
204   Optional<unsigned> Column;  in parseArg()  local
214       if (File || Line || Column)  in parseArg()
218       if (Error E = parseDebugLoc(File, Line, Column, ArgEntry))  in parseArg()
244                             Line.getValueOr(0), Column.getValueOr(0)}});  in parseArg()
280               parseDebugLoc(State.File, State.Line, State.Column, RemarkField))  in parseYAMLElement()
313                             State.Column.getValueOr(0)},  in parseYAMLElement()