341 void ios_base::swap(ios_base& rhs) noexcept {  in swap()  function in ios_base
342   std::swap(__fmtflags_, rhs.__fmtflags_);  in swap()
343   std::swap(__precision_, rhs.__precision_);  in swap()
344   std::swap(__width_, rhs.__width_);  in swap()
345   std::swap(__rdstate_, rhs.__rdstate_);  in swap()
346   std::swap(__exceptions_, rhs.__exceptions_);  in swap()
349   std::swap(lhs_loc, rhs_loc);  in swap()
350   std::swap(__fn_, rhs.__fn_);  in swap()
351   std::swap(__index_, rhs.__index_);  in swap()
352   std::swap(__event_size_, rhs.__event_size_);  in swap()
353   std::swap(__event_cap_, rhs.__event_cap_);  in swap()
354   std::swap(__iarray_, rhs.__iarray_);  in swap()
355   std::swap(__iarray_size_, rhs.__iarray_size_);  in swap()
356   std::swap(__iarray_cap_, rhs.__iarray_cap_);  in swap()
357   std::swap(__parray_, rhs.__parray_);  in swap()
358   std::swap(__parray_size_, rhs.__parray_size_);  in swap()
359   std::swap(__parray_cap_, rhs.__parray_cap_);  in swap()