qregularexpression_example_app.cpp

#include <QCoreApplication>
#include <QRegularExpressionMatch>
#include <QStringList>
#include <iostream>
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    
    QStringList results;
    QRegularExpression this_regex("(\\wog)|(\\wee)");
    QString test_string = "dog pog log moo dew tree glee dee";

    if(!this_regex.isValid())
    {
        std::cerr << "Invalid regex pattern: " << this_regex.pattern().toStdString() << std::endl;
        return -2;
    }

    for (int i = 0; i < this_regex.captureCount()+1; ++i)
    {
        // This skips storing capture-group 0 if any capture-groups were actually specified.
        // If they weren't, capture-group 0 will be the only thing returned.
        if((i!=0) || (this_regex.captureCount() < 1))
        {
            QRegularExpressionMatchIterator iterator = this_regex.globalMatch(test_string);

            while (iterator.hasNext())
            {
                QRegularExpressionMatch match = iterator.next();

                QString matched = match.captured(i);

                // Remove this if-check if you want to keep zero-length results
                if(matched.length() > 0){results << matched;}
            }
        }
    }

    if(results.length()==0){return -1;}

    for(int i = 0; i < results.length(); i++)
    {
        std::cout << results.at(i).toStdString() << std::endl;
        auto temp = 0;
    }

    return 0;
}