gistfile1.txt

//
//  main.m
//  Blah
//
//  Created by Seth Willits on 11/12/14.
//  Copyright (c) 2014 Araelium Group. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface Foo : NSObject
@property (readwrite) NSString * __autoreleasing* errorHandle;
@property (readwrite, copy) Foo * (^array)(NSString * param, BOOL (^block)(NSString * param, NSString * __autoreleasing* error));
@property (readwrite) BOOL success;
@end

@implementation Foo

- (id)initWithError:(NSString * __autoreleasing *)errorHandle;
{
	self = [super init];
	
	__weak Foo * weakSelf = self;
	
	self.errorHandle = errorHandle;
	self.array = ^(NSString * param, BOOL (^block)(NSString * param, NSString ** error)){
		
		weakSelf.success = block(param, weakSelf.errorHandle);
		
		return weakSelf;
	};
	
	return self;
}

@end




int main(int argc, const char * argv[])
{
	@autoreleasepool {
		NSString * e = nil;
		
		Foo * foo = [[Foo alloc] initWithError:&e];
		
		if (foo.array(@"abc", ^(NSString * param, NSString ** error){
				NSArray * comps = [param componentsSeparatedByString:@","];
				if (comps.count <= 1) {
					*error = @"Not an array";
					return NO;
				} else {
					return YES;
				}
			}).success)
		{
			
			NSLog(@"Success");
			
		}
		else
		{
			
			NSLog(@"Failure - %@", e);
			
		}
		
	}
	
    return 0;
}