gistfile1.m

/*
 Enum with Fixed Underlying Type
 New with Xcode 4.4
 Via WWDC2012 Session 405 - Modern Objective-C

 Results in better code completion and stronger type checking.
 Use -Wconversion compiler flag to check for enum type errors.
 -Wswitch for checking if switch statement is fully handled for enum.
*/

typedef enum NSNumberFormatterStyle : NSUInteger {
    NSNumberFormatterNoStyle,
    NSNumberFormatterDecimalStyle,
    NSNumberFormatterCurrencyStyle,
    NSNumberFormatterPercentStyle,
    NSNumberFormatterScientificStyle,
    NSNumberFormatterSpellOutStyle
} NSNumberFormatterStyle;

/*
 NS_ENUM macro - checks whether fixed underlying type is available,
 uses if it is. (What Foundation headers are starting to use).
*/
typedef NS_ENUM(NSUInteger, NSNumberFormatterStyle) {
    NSNumberFormatterNoStyle,
    NSNumberFormatterDecimalStyle,
    NSNumberFormatterCurrencyStyle,
    NSNumberFormatterPercentStyle,
    NSNumberFormatterScientificStyle,
    NSNumberFormatterSpellOutStyle
};