QtTaskTree::RepeatIterator Class

class QtTaskTree::RepeatIterator

The repetitive iterator to be used inside For element. More...

Header:	`#include <qtasktree.h>`
Inherits:	QtTaskTree::Iterator

List of all members, including inherited members

Note: All functions in this class are reentrant.

Public Functions

RepeatIterator(int count)

Detailed Description

See also Iterator, ForeverIterator, UntilIterator, and ListIterator.

Member Function Documentation

RepeatIterator::RepeatIterator(int count)

Constructs the repetitive iterator for the For (RepeatIterator(count)) >> Do {} construct. The iterator will repeat count times.

Example usage:

static const int maxTries = 5;
static const int maxNumber = 10;
const int luckyNumber = QRandomGenerator().global()->bounded(maxNumber);

qDebug() << "Today's lucky number is:" << luckyNumber;
qDebug() << "You have" << maxTries << "lottery tickets.";
qDebug() << "Let's start the drawing...";

const auto onNumberCheck = [luckyNumber] {
    const int drawnNumber = QRandomGenerator().global()->bounded(maxNumber);
    qDebug() << "You have drawn:" << drawnNumber;
    return drawnNumber == luckyNumber;
};

const auto onDone = [](DoneWith result) {
    if (result == DoneWith::Success)
        qDebug() << "You have won! Congratulations!";
    else if (result == DoneWith::Error)
        qDebug() << "You have lost. Try again.";
};

const Group recipe {
    For (RepeatIterator(maxTries)) >> Do {
        stopOnSuccess,
        timeoutTask(1s),
        QSyncTask(onNumberCheck)
    },
    onGroupDone(onDone)
};

The possible output when the recipe is started by the QTaskTree, and finishes with success:

Today's lucky number is: 6
You have 5 lottery tickets.
Let's start the drawing...
You have drawn: 9
You have drawn: 6
You have won! Congratulations!

In case it finishes with an error, the output might look like:

Today's lucky number is: 8
You have 5 lottery tickets.
Let's start the drawing...
You have drawn: 1
You have drawn: 7
You have drawn: 6
You have drawn: 7
You have drawn: 2
You have lost. Try again.

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