Method what

test-app/runtime/src/main/cpp/ada/ada.h:2874–2876

  explicit bad_expected_access(E e) : m_val(std::move(e)) {}

  virtual const char *what() const noexcept override {
    return "Bad expected access";
  }

  const E &error() const & { return m_val; }
  E &error() & { return m_val; }