ofstream/ostream flush() error check

[pnayak]

Is this method of checking, if flush() succeeded or failed, valid?

std::ofstream ofs;
file.open("test.txt")

file << "line of text";

if (!ofs.flush()) {
    std::cout << " failed to write \n ";
    return 1;
}

[weaknessforcats]

The flush() member function returns an ostream& so it is pointless to check for a null return.

If the function does not throw an exception, then you have to assume it succeeded.