MirrorDescription.swift

import Foundation

protocol MirrorDescribable : CustomStringConvertible {}

extension MirrorDescribable {
    
    var description : String {
        return mirrorDescription
    }
    
    var mirrorDescription : String {

        get {
            var descr : String = "\n\(self.dynamicType)\n"
            
            let mirror = Mirror(reflecting: self)
            for child in mirror.children {
                
                if let label = child.label {
                    descr += label + " : "
                }
                
                
                if let value = child.value as? String {
                    descr += value
                } else if let value = child.value as? MirrorDescribable {
                    descr += "\n\t" + value.mirrorDescription.stringByReplacingOccurrencesOfString("\n", withString: "\n\t")
                } else if let value = child.value as? OptionalMirrorDescribable {
                    descr += "\n\t" + value.mirrorDescription.stringByReplacingOccurrencesOfString("\n", withString: "\n\t")
                } else if let value = child.value as? CustomStringConvertible {
                    descr += value.description
                }
                
                descr += "\n"
            }
            
            descr += "\n"
            
            return descr
        }
    }
}

extension Optional {
    private var value : Any? {
        return self
    }
}

private protocol OptionalMirrorDescribable {
    var value : Any? { get }
}

extension Optional : OptionalMirrorDescribable {}

extension OptionalMirrorDescribable {
    
    var description : String {
        return mirrorDescription
    }
    
    var mirrorDescription : String {
        
        get {
            
            if let sure = self.value as? MirrorDescribable {
                return sure.mirrorDescription
            } else if let sure = self.value as? CustomStringConvertible {
                return sure.description
            } else if let sure = self.value as? String {
                return sure
            }
            return ""
        }
    }
}