enum c tutorial

enum_in_c

http://crasseux.com/books/ctutorial/enum.html


typedef NS_OPTIONS(NSUInteger, ComponentOptions){
    ComponentOptionA = 0,
    ComponentOptionB = 1 << 0,
    ComponentOptionC = 1 << 1,
    ComponentOptionD = 1 << 2,
    ComponentOptionE = 1 << 3,
    ComponentOptionF = 1 << 4,
    ComponentOptionG = 1 << 5,

};

typedef NS_ENUM(NSUInteger, OptionsName){
    OptionNameNull  = 'a',
    OptionNameOpen,
    OptionNameClose,

};