Merge branch 'develop' into corestore4_develop

# Conflicts:
#	CoreStore.podspec
#	Sources/CoreStoreImportableAttributeType.swift
#	Sources/CoreStoreQueryableAttributeType.swift
#	Sources/Info.plist
#	Sources/NSManagedObjectModel+Setup.swift

Sources/SaveResult.swift

@@ -0,0 +1,131 @@
+//
+//  SaveResult.swift
+//  CoreStore
+//
+//  Copyright © 2014 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+import Foundation
+
+
+// MARK: - SaveResult
+
+/**
+ The `SaveResult` indicates the result of a `commit(...)` for a transaction.
+ The `SaveResult` can be treated as a boolean:
+ ```
+ CoreStore.beginAsynchronous { transaction in
+     // ...
+     let result = transaction.commit()
+     if result {
+        // succeeded
+     }
+     else {
+        // failed
+     }
+ }
+ ```
+ or as an `enum`, where the resulting associated object can also be inspected:
+ ```
+ CoreStore.beginAsynchronous { transaction in
+     // ...
+     let result = transaction.commit()
+     switch result {
+     case .success(let hasChanges):
+        // hasChanges indicates if there were changes or not
+     case .failure(let error):
+        // error is a CoreStoreError enum value
+     }
+ }
+ ```
+ */
+@available(*, deprecated, message: "Use the new DataStack.perform(asynchronous:...) and DataStack.perform(synchronous:...) family of APIs")
+public enum SaveResult: Hashable {
+    
+    /**
+     `SaveResult.success` indicates that the `commit()` for the transaction succeeded, either because the save succeeded or because there were no changes to save. The associated value `hasChanges` indicates if there were saved changes or not.
+     */
+    case success(hasChanges: Bool)
+    
+    /**
+     `SaveResult.failure` indicates that the `commit()` for the transaction failed. The associated object for this value is a `CoreStoreError` enum value.
+     */
+    case failure(CoreStoreError)
+    
+    
+    /**
+     Returns `true` if the result indicates `.success`, `false` if the result is `.failure`.
+     */
+    public var boolValue: Bool {
+        
+        switch self {
+            
+        case .success: return true
+        case .failure: return false
+        }
+    }
+    
+    
+    // MARK: Equatable
+    
+    public static func == (lhs: SaveResult, rhs: SaveResult) -> Bool {
+        
+        switch (lhs, rhs) {
+            
+        case (.success(let hasChanges1), .success(let hasChanges2)):
+            return hasChanges1 == hasChanges2
+            
+        case (.failure(let error1), .failure(let error2)):
+            return error1 == error2
+            
+        default:
+            return false
+        }
+    }
+    
+    
+    // MARK: Hashable
+    
+    public var hashValue: Int {
+        
+        switch self {
+            
+        case .success(let hasChanges):
+            return self.boolValue.hashValue ^ hasChanges.hashValue
+            
+        case .failure(let error):
+            return self.boolValue.hashValue ^ error.hashValue
+        }
+    }
+    
+    
+    // MARK: Internal
+    
+    internal init(hasChanges: Bool) {
+        
+        self = .success(hasChanges: hasChanges)
+    }
+    
+    internal init(_ error: CoreStoreError) {
+        
+        self = .failure(error)
+    }
+}