[LIP] std::cin.readsome(...) and std::cin.rdbuf()->in_avail()

Hi,

When it is undesirable to wait for input from a keyboard to std::cin we
use either std::cin.readsome() to peek at the stream. Also
std::cin.in_avail() can be used for similar purposes.

But, how to know in this situation whether std::cin has received <EOF>
as both the above functions do not set the ios_base::eofbit.

For example,

#include <iostream>
 
void parse(std::istream& is)
{
	const int BUF_SIZE = 1024;
	char buf[BUF_SIZE + 1];
	std::cin.getline(buf, BUF_SIZE);
	std::cout << buf << std::endl;
}
                                                                        
int main(void)
{
	while (std::cin) {
		if (std::cin.rdbuf()->in_avail()) parse(std::cin);
		else /* do something */ ;
	}
	return 0;
}

will NOT quit when <ctrl-D> is pressed. It does quit if followed by a \n
ie., <Enter>. What can be done in main() to quit when <ctrl-D> is
pressed? Should not std::istream::readsome() and in_avail() set the
ios_base::eofbit?

Thank you.
-- 
Josy P. Pullockara <[email protected]>
National Aerospace Laboratories



-------------------------------------------------------
This SF.net email is sponsored by: SF.net Giveback Program.
Does SourceForge.net help you be more productive?  Does it
help you create better code?  SHARE THE LOVE, and help us help
YOU!  Click Here: http://sourceforge.net/donate/