Optional.h

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#pragma once
 
namespace audio_driver_local {
 
template <typename T> class Optional {
public:
  Optional() {}
  Optional(T value) {
    val = value;
    is_valid = true;
  }
  operator bool() const { return is_valid; }
  T &value() { return val; }
  T &valueOr(T alt) { return is_valid ? val : alt; }
  void reset() { is_valid = false; }
 
protected:
  bool is_valid = false;
  T val;
};
 
}