QtTaskTree::UntilIterator Class

Member Function Documentation

UntilIterator::UntilIterator(const QtTaskTree::Iterator::Condition &condition)

Constructs the conditional iterator for the For (UntilIterator(condition)) >> Do {} construct. The iterator will repeat until passed condition returns true.

Example usage:

 static const int maxNumber = 10;
 const int luckyNumber = QRandomGenerator().global()->bounded(maxNumber);

 qDebug() << "Today's lucky number is:" << luckyNumber;
 qDebug() << "Let's start the drawing...";

 const auto onConditionCheck = [luckyNumber](int iteration) {
     if (iteration == 0)
         return true;
     const int drawnNumber = QRandomGenerator().global()->bounded(maxNumber);
     qDebug() << "You have drawn:" << drawnNumber;
     bool won = drawnNumber == luckyNumber;
     if (won)
         qDebug() << "You have won! Congratulations!";
     return !won;
 };

 const Group recipe = For (UntilIterator(onConditionCheck)) >> Do {
     timeoutTask(1s, DoneResult::Success)
 };

The possible output when the recipe is started by the QTaskTree:

 Today's lucky number is: 7
 Let's start the drawing...
 You have drawn: 2
 You have drawn: 5
 You have drawn: 0
 You have drawn: 2
 You have drawn: 4
 You have drawn: 9
 You have drawn: 9
 You have drawn: 7
 You have won! Congratulations!