std::basic_ios::setstate

1	`void` `setstate( iostate state );`

Sets the stream error flags state in addition to currently set flags. Essentially calls clear(rdstate() | state). May throw an exception.

Parameters

state

stream error state flags to set. It can be a combination of the following constants:

Constant	Explanation
`goodbit`	no error
`badbit`	irrecoverable stream error
`failbit`	input/output operation failed (formatting or extraction error)
`eofbit`	associated input sequence has reached end-of-file

Return value

(none).

Example

#include <iostream>
#include <sstream>
  
int main()
{
    std::ostringstream stream;
  
    if (!stream.fail()) {
        std::cout << "stream is not fail\n";
    }
  
    stream.setstate(std::ios_base::failbit);
  
    if (stream.fail()) {
        std::cout << "now stream is fail\n";
    }
  
    if (!stream.good()) {
        std::cout << "and stream is not good\n";
    }
}

Output:

stream is not fail
now stream is fail
and stream is not good

rdstate	returns state flags (public member function)
clear	clears error and eof flags (public member function)

std::basic_ios::setstate

Parameters

Return value

Example

See also