Xport Interface: parser::operator !

Evaluates the formatter object.

bool formatter::operator !();

Parameters

None

Returns

Returns true if it's specified output file/stream is valid, false otherwise.

Remarks

This operation is used to verify the state of parser's internal input stream. The input stream/file is specified in parser's constructor. If a file or stream is specified which is not opened or in a bad state, this operation will return false. If the stream or file is open and in a good state, the operation will return true.

This operation is handy for verifying the state of the parser object before using it to parse a file or input stream.

Complexity

Constant

Example

#include "xhtml_doc.h"
#include <iostream>

int main(int argc, char* argv[])
{
  using namespace Xport;

  parser prsr1(std::cin);
  parser prsr2("c:\bad?file");

  std::cout << "Parser 1 is in a " << (!prsr1 ? "bad" : "good") << " state.\n";
  std::cout << "Parser 2 is in a " << (!prsr2 ? "bad" : "good") << " state.\n";

  return 0;
}