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

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

#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

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

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