title: Swift 2.0: Type of Expression is ambiguous without more context?
body: <p>The following used to work in Swift 1.2:</p>
  
  <pre><code>var recordSettings = [
      AVFormatIDKey: kAudioFormatMPEG4AAC,
      AVEncoderAudioQualityKey : AVAudioQuality.Max.rawValue,
      AVEncoderBitRateKey : 320000,
      AVNumberOfChannelsKey: 2,
      AVSampleRateKey : 44100.0]
  </code></pre>
  
  <p>Now, it gives the error:</p>
  
  <blockquote>
    <p>"Type expression is ambiguous without more context".</p>
  </blockquote>