// In C# we might have something like:
public class UserAccount
{
    [ManimumLength(8)]
    [MaximumLength(20)]
    public string { get; set; }
}




// UserAccount.h
#import <Foundation/Foundation.h>

#define EDITORTYPE @"EditorType"

enum ValidationType
{
    ValidateMinimumLength = 0,
    ValidateMaximumLength = 1,

};

@interface UserAccount : NSObject {

}

@property (nonatomic, retain) NSString *name;

@end




// UserAccount.m
#import "UserAccount.h"
#import "NSObject+MetadataExtensions.h"

@implementation UserAccount
metadata_class(UserAccount, EDITORTYPE, @"UserEditor"); // Wait, what's this?! How did we do that?

metadata_property(name, ValidateMinimumLength, 8, ValidateMaximumLength, 20); // Again?
@synthesize name;

/***************************

 **************************/
metadata_cMethod(testClassMethod, @"More", @"MetaData"); // Here too?
+ (void)testClassMethod {

}

/***************************

 **************************/
+ (void)unannotatedClassMethod {

}

@end




// Then to get output we do things like:
NSLog(@"Class: %@", [UserAccount classMetadata]);
NSLog(@"Property (by name): %@", [UserAccount metadataForPropertyWithName:@"name"]);