NAME

std::basic_ios::rdstate - std::basic_ios::rdstate

Synopsis

iostate rdstate() const;

Returns the current stream error state.

Parameters

(none)

Return value

current stream error state. It is a bitmask type and 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

Example

// Run this code

#include <iostream>
#include <sstream>

int main()
{
std::ostringstream stream;

if (stream.rdstate() == std::ios_base::goodbit) {
std::cout << "stream state is goodbit\n";
}

stream.setstate(std::ios_base::eofbit);

// check state is exactly eofbit (no failbit and no badbit)
if (stream.rdstate() == std::ios_base::eofbit) {
std::cout << "stream state is eofbit\n";
}
}

Output:

stream state is goodbit
stream state is eofbit

See also

setstate sets state flags
(public member function)
clear modifies state flags
(public member function)