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std::basic_ios::setstate

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< cpp‎ | io‎ | basic ios
Revision as of 02:19, 5 September 2013 by Ruslo (Talk | contribs)

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.

Contents

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

See also

returns state flags
(public member function) [edit]
clears error and eof flags
(public member function) [edit]