C++ IOS Library - setstate
Description
It is used to check Set error state flag. Modifies the current internal error state flags by combining the current flags with those in argument state (as if performing a bitwise OR operation).Any error bitflag already set is not cleared. See member clear for a similar function that does.
. In the case that no stream buffer is associated with the stream when this function is called, the badbit flag is automatically set (no matter the value for that bit passed in argument state).
Declaration
Following is the declaration for ios::setstate function.
void setstate (iostate state);
Parameters
state − An object of type ios_base::iostate that can take as value any combination of the following member constants −
iostate value
(member constant) |
indicates |
functions to check state flags |
|---|
| good() |
eof() |
fail() |
bad() |
rdstate() |
| goodbit |
No errors (zero value iostate) |
true |
false |
false |
false |
goodbit |
| eofbit |
End-of-File reached on input operation |
false |
true |
false |
false |
eofbit |
| failbit | Logical error on i/o operation |
false |
false |
true |
false |
failbit |
| badbit | Read/writing error on i/o operation |
false |
false |
true |
true |
badbit |
Return Value
non.
Exceptions
Basic guarantee − if an exception is thrown, the stream is in a valid state. It throws an exception of member type failure if the resulting error state flag is not goodbit and member exceptions was set throw for that state.
Data Races
Modifies the stream object.
Concurrent access to the same stream object may cause data races.
ios.htm
