Spec DoublePassRecordReader

Record reader specialization for double-pass reading.

/*!
 * @class DoublePassRecordReader
 * 
 * @extends RecordReader
 * 
 * @headerfile <seqan/stream.h.
 * 
 * @brief Record reader specialization for double-pass reading.
 * 
 * @signature template <typename TStream> class RecordReader<TStream,
 *            DoublePass>;
 * 
 * @tparam TStream The @link StreamConcept @endlink type to use for reading.
 * 
 * Not default or copy constructable.
 * 
 * @fn DoublePassRecordReader#startFirstPass
 * 
 * @brief Start the first reading pass.
 * 
 * @signature void startFirstPass(reader);
 * 
 * @param[in,out] reader The RecordReader to start the first pass with.
 * 
 * Calling this function will memoize the current position in the buffer to
 * return to in second pass.
 * 
 * @fn DoublePassRecordReader#startSecondPass
 * 
 * @brief Start the second reading pass.
 * 
 * @signature void startSecondPass(reader);
 * 
 * @param[in,out] reader The RecordReader to start the second pass with.
 * 
 * This will reset the position in the buffer.
 */