std::basic_ios<CharT,Traits>::setstate

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

# Declarations

void setstate( iostate state );

# 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";
}

# See also

• rdstate
• clear