Open Radar

 
Summary:
Given an optional array, dictionary or set it is not possible to do a “==“ comparison to Optional.None or Optional.Some

Steps to Reproduce:
1. Open a Playground
2. Write the following code
```
let dictionary: [String: AnyObject]? = nil
dictionary == .None

let array: [Bool]? = nil
array == .None
```

Expected Results:
dictionary == .None => true
array == .None => true

Actual Results:
dictionary == .None => Error: “Type of expression is ambiguous without more context”
array == .None => Error: “Type of expression is ambiguous without more context”

Notes:
If a `switch` statement is used it matches `.None` and `.Some` as expected. 
Like this:
```
let dictionary: [String: AnyObject]? = nil
switch dictionary {
case .None: print("None")
case .Some: print("Some")
}
```

Also not working in Xcode 7.0(.1) - Swift 2.0