C++ Qt how convert Q_ENUM to QString, std::string

output.txt

"CAT"
CPP 

MyNameSpace::Animal::MONKEY
MyNameSpace::Animal(-1) // MyNameSpace::Animal::C is not valid
MyNameSpace::C 

MyNameSpace::Animal::CAT
MyNameSpace::PYTHON 

"CAT"
"CPP"

Q_EnumToString.cpp

// credits to @Meefte answer. https://stackoverflow.com/a/34282031/14745345
// https://doc.qt.io/qt-5/qmetaenum.html#keyToValue
// https://doc.qt.io/qt-5/qobject.html#Q_ENUM
// https://doc.qt.io/qt-5/qobject.html#Q_ENUM_NS

#include <QtCore>
#include <iostream>

namespace MyNameSpace
{
    Q_NAMESPACE

    enum class Animal
    {
        CAT = 10,
        DOG,
        MONKEY
    };
    Q_ENUM_NS(Animal);

    enum Language
    {
        CPP,
        C,
        PYTHON
    };
    Q_ENUM_NS(Language);
}

template <typename QEnum>
QString QtEnumToQString(const QEnum value)
{
    return QString(QMetaEnum::fromType<QEnum>().valueToKey((int)value)); // or c++23 version .valueToKey(std::to_underlying(value))
}

template <typename QEnum>
std::string QtEnumToString(const QEnum value)
{
    return std::string(QMetaEnum::fromType<QEnum>().valueToKey(value));
}

template <typename QEnum>
QEnum QStringToQtEnum(const QString value)
{
    return (QEnum)QMetaEnum::fromType<QEnum>().keysToValue(value.toUtf8().data());
}

template <typename QEnum>
QEnum charToQtEnum(const char *value)
{
    return (QEnum)QMetaEnum::fromType<QEnum>().keysToValue(value);
}

int main(int argc, char *argv[])
{
    qDebug() << QtEnumToQString<MyNameSpace::Animal>(MyNameSpace::Animal::CAT);
    qDebug() << QtEnumToString<MyNameSpace::Language>(MyNameSpace::CPP).c_str() << "\n";

    qDebug() << QStringToQtEnum<MyNameSpace::Animal>("MONKEY");
    qDebug() << QStringToQtEnum<MyNameSpace::Animal>("C");
    qDebug() << QStringToQtEnum<MyNameSpace::Language>("C") << "\n";

    qDebug() << charToQtEnum<MyNameSpace::Animal>("CAT");
    qDebug() << charToQtEnum<MyNameSpace::Language>("PYTHON") << "\n";

    qDebug() << QtEnumToQString<MyNameSpace::Animal>(QStringToQtEnum<MyNameSpace::Animal>("CAT"));
    qDebug() << QtEnumToQString<MyNameSpace::Language>(QStringToQtEnum<MyNameSpace::Language>("CPP"));
}