Dactyloidae iOS initial commit

mobile/ios/ThirdParty/Result/Result.swift

@@ -0,0 +1,76 @@
+//
+//  Result.swift
+//  Result
+//
+//  Created by John Gallagher on 9/12/14.
+//  Copyright (c) 2014 Big Nerd Ranch. All rights reserved.
+//
+
+import Foundation
+//import Box
+
+public enum Maybe<T> {
+    case failure(MaybeErrorType)
+
+    // TODO: Get rid of Box hack at some point after 6.3
+    case success(Box<T>)
+
+    public init(failure: MaybeErrorType) {
+        self = .failure(failure)
+    }
+
+    public init(success: T) {
+        self = .success(Box(success))
+    }
+
+    public var successValue: T? {
+        switch self {
+        case let .success(success): return success.value
+        case .failure: return nil
+        }
+    }
+
+    public var failureValue: MaybeErrorType? {
+        switch self {
+        case .success: return nil
+        case let .failure(error): return error
+        }
+    }
+
+    public var isSuccess: Bool {
+        switch self {
+        case .success: return true
+        case .failure: return false
+        }
+    }
+
+    public var isFailure: Bool {
+        switch self {
+        case .success: return false
+        case .failure: return true
+        }
+    }
+
+    public func map<U>(_ f: (T) -> U) -> Maybe<U> {
+        switch self {
+        case let .failure(error): return .failure(error)
+        case let .success(value): return .success(Box(f(value.value)))
+        }
+    }
+
+    public func bind<U>(_ f: (T) -> Maybe<U>) -> Maybe<U> {
+        switch self {
+        case let .failure(error): return .failure(error)
+        case let .success(value): return f(value.value)
+        }
+    }
+}
+
+extension Maybe: CustomStringConvertible {
+    public var description: String {
+        switch self {
+        case let .failure(error): return "Result.Failure(\(error))"
+        case let .success(value): return "Result.Success(\(value.value))"
+        }
+    }
+}