Method AsMessage

common/value.h:865–867

Performs a checked cast from a value to a message value, returning a non-empty optional with either a value or reference to the message value. Otherwise an empty optional is returned.

  // returning a non-empty optional with either a value or reference to the
  // message value. Otherwise an empty optional is returned.
  absl::optional<MessageValue> AsMessage() & {
    return std::as_const(*this).AsMessage();
  }
  absl::optional<MessageValue> AsMessage() const&;
  absl::optional<MessageValue> AsMessage() &&;
  absl::optional<MessageValue> AsMessage() const&& {