153       const bool __testin = this->_M_mode & ios_base::in;  in underflow()  local
154       if (__testin)  in underflow()
171       bool __testin = (ios_base::in & this->_M_mode & __mode) != 0;  in seekoff()  local
173       const bool __testboth = __testin && __testout && __way != ios_base::cur;  in seekoff()
174       __testin &= !(__mode & ios_base::out);  in seekoff()
179       const char_type* __beg = __testin ? this->eback() : this->pbase();  in seekoff()
180       if ((__beg || !__off) && (__testin || __testout || __testboth))  in seekoff()
194 	  if ((__testin || __testboth)  in seekoff()
219       const bool __testin = (ios_base::in & this->_M_mode & __mode) != 0;  in seekpos()  local
222       const char_type* __beg = __testin ? this->eback() : this->pbase();  in seekpos()
223       if ((__beg || !off_type(__sp)) && (__testin || __testout))  in seekpos()
232 	      if (__testin)  in seekpos()
248       const bool __testin = _M_mode & ios_base::in;  in _M_sync()  local
261       if (__testin)  in _M_sync()
269 	  if (!__testin)  in _M_sync()