Island/Darwin: cast operators for Array too NSArray (even though int uses List<T> under the hood); ToSwiftArray extension for sequences

Author: dwarfland

Source/Array.swift

@@ -191,6 +191,20 @@ public struct Array<T>
 		return [T](list)
 	}
 
+	#if ISLAND && DARWIN
+	public static func __implicit(_ array: NSArray<T>) -> [T] {
+		return List<T>(array)
+	}
+
+	public static func __implicit(_ array: [T]) -> NSArray<T> {
+		return array.list.ToNSArray()
+	}
+
+	public static func __implicit(_ list: [T]) -> NSMutableArray<T> {
+		return list.list.ToNSMutableArray()
+	}
+	#endif
+
 	#if COCOA
 	public static func __implicit(_ list: PlatformImmutableList<T>) -> [T] {
 		return [T](list)

Source/Sequence_Extensions.swift

@@ -24,6 +24,17 @@ public extension ISequence /*: ICustomDebugStringConvertible*/ { // 74092: Silve
 		return array as! ISequence<T> // 74041: Silver: warning for "as" cast that should be known safe
 	}
 
+	public func ToSwiftArray() -> [T] {
+		if let array = self as? [T] {
+			return array.platformList
+		}
+		var result = [T]()
+		for i in self {
+			result.append(i)
+		}
+		return result
+	}
+
 	public var count: Int {
 		return self.Count()
 	}