enum types in C/Objective-C

gistfile1.c

// unpredictable backing type for this enum
typedef enum {
    CDZTypePhone,
    CDZTypeEmail
} CDZType;

// vs.

enum {
    CDZTypePhone,
    CDZTypeEmail
};
typedef NSUInteger CDZType;

// vs. a better way via Clang's support for C++11 enumerations
// http://clang.llvm.org/docs/LanguageExtensions.html#objc_fixed_enum

typedef enum : NSUInteger {
    CDZTypePhone,
    CDZTypeEmail
} CDZType;