Suppose you're reading from standard input or from a network stream using QTextStream. You read a numeric value, and then you read a single character.

• The single character read will be the newline terminating the previous numeric value. This is seemingly correct, although different from iostream's behavior - perhaps it should be better documented?

• What's incorrect is that operator>>(char&) and operator>>(QChar&) waits for a non-whitespace character in spite of there already being a newline in the buffer.

QTextStream cin(stdin);

int a;
char b;

cin >> a;
cin >> b; // blocks for non-whitespace input in spite of there being whitespace input available

#ifdef Q_OS_UNIX
Q_ASSERT(b == '\n')
#endif