QPromise::reject (static)

Since: 0.1.0

(static) QPromise<T>::reject(any reason) -> QPromise<T>

Creates a QPromise<T> that is rejected with the given reason of whatever type:

QPromise<int> compute(const QString& type)
{
    if (type == "foobar") {
        return QPromise<int>::reject(QString{"Unknown type: %1"}.arg(type));
    }

    return QPromise<int>{[](const QPromiseResolve<int>& resolve) {
        // {...}
    }};
}