Method shift

sql/item_numconvfunc.cc:445–451

Return the current look ahead token and scan the next one */

    Return the current look ahead token and scan the next one
  */
  Token shift()
  {
    DBUG_ASSERT(!is_error());
    const Token res= m_look_ahead_token;
    m_look_ahead_token= get_token(m_cs);
    return res;
  }

  THD *thd() const { return m_thd; }
public: