added iOS source code

[wl-app.git] / iOS / Pods / RealmSwift / RealmSwift / Optional.swift

diff --git a/iOS/Pods/RealmSwift/RealmSwift/Optional.swift b/iOS/Pods/RealmSwift/RealmSwift/Optional.swift
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+++ b/iOS/Pods/RealmSwift/RealmSwift/Optional.swift
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+////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2015 Realm Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+////////////////////////////////////////////////////////////////////////////
+
+import Realm
+
+/// A protocol describing types that can parameterize a `RealmOptional`.
+public protocol RealmOptionalType {
+}
+
+public extension RealmOptionalType {
+    /// :nodoc:
+    public static func className() -> String {
+        return ""
+    }
+}
+extension Int: RealmOptionalType {}
+extension Int8: RealmOptionalType {}
+extension Int16: RealmOptionalType {}
+extension Int32: RealmOptionalType {}
+extension Int64: RealmOptionalType {}
+extension Float: RealmOptionalType {}
+extension Double: RealmOptionalType {}
+extension Bool: RealmOptionalType {}
+
+/**
+ A `RealmOptional` instance represents an optional value for types that can't be
+ directly declared as `@objc` in Swift, such as `Int`, `Float`, `Double`, and `Bool`.
+
+ To change the underlying value stored by a `RealmOptional` instance, mutate the instance's `value` property.
+ */
+public final class RealmOptional<Value: RealmOptionalType>: RLMOptionalBase {
+    /// The value the optional represents.
+    public var value: Value? {
+        get {
+            return underlyingValue.map(dynamicBridgeCast)
+        }
+        set {
+            underlyingValue = newValue.map(dynamicBridgeCast)
+        }
+    }
+
+    /**
+     Creates a `RealmOptional` instance encapsulating the given default value.
+
+     - parameter value: The value to store in the optional, or `nil` if not specified.
+     */
+    public init(_ value: Value? = nil) {
+        super.init()
+        self.value = value
+    }
+}