XCode project for app, moved app project to folder

SideStoreApp/Sources/Shared/Extensions/Result+Conveniences.swift

@@ -0,0 +1,57 @@
+//
+//  Result+Conveniences.swift
+//  AltStore
+//
+//  Created by Riley Testut on 5/22/19.
+//  Copyright © 2019 Riley Testut. All rights reserved.
+//
+
+import Foundation
+
+public extension Result {
+    var value: Success? {
+        switch self {
+        case let .success(value): return value
+        case .failure: return nil
+        }
+    }
+
+    var error: Failure? {
+        switch self {
+        case .success: return nil
+        case let .failure(error): return error
+        }
+    }
+
+    init(_ value: Success?, _ error: Failure?) {
+        switch (value, error) {
+        case let (value?, _): self = .success(value)
+        case let (_, error?): self = .failure(error)
+        case (nil, nil): preconditionFailure("Either value or error must be non-nil")
+        }
+    }
+}
+
+public extension Result where Success == Void {
+    init(_ success: Bool, _ error: Failure?) {
+        if success {
+            self = .success(())
+        } else if let error = error {
+            self = .failure(error)
+        } else {
+            preconditionFailure("Error must be non-nil if success is false")
+        }
+    }
+}
+
+public extension Result {
+    init<T, U>(_ values: (T?, U?), _ error: Failure?) where Success == (T, U) {
+        if let value1 = values.0, let value2 = values.1 {
+            self = .success((value1, value2))
+        } else if let error = error {
+            self = .failure(error)
+        } else {
+            preconditionFailure("Error must be non-nil if either provided values are nil")
+        }
+    }
+}