[basic.ios.cons]
31 Input/output library [input.output]
31.5 Iostreams base classes [iostreams.base]
31.5.4 Class template basic_ios [ios]
31.5.4.2 Constructors [basic.ios.cons]
explicit basic_ios(basic_streambuf<charT, traits>* sb);
Effects: Assigns initial values to its member objects by calling init(sb).
Effects: Leaves its member objects uninitialized.
The object shall be initialized by calling basic_ios::init before its first use or before it is destroyed, whichever comes first; otherwise the behavior is undefined.
Remarks: The destructor does not destroy rdbuf().
void init(basic_streambuf<charT, traits>* sb);
Table 142 — basic_ios::init() effects [tab:basic.ios.cons]
Element | Value |
rdbuf() | sb |
tie() | 0 |
rdstate() | goodbit if sb is not a null pointer, otherwise badbit. |
exceptions() | goodbit |
flags() | skipws | dec |
width() | 0 |
precision() | 6 |
fill() | widen(' ') |
getloc() | a copy of the value returned by locale() |
iarray | a null pointer |
parray | a null pointer |