I need a way to skip prologue and epilogue in JSON sometimes.

[Rational-pi]

I recurrently need to write some C++ objects not as objects in JSON. For example, QString. If I implement the standard serialization, I end up with:
"QStingVariableName"{ "Value0":"whatever"}
but I need it to be:
"QStingVariableName":"whatever"
I hacked a bit the json archive to do so but It would be great to have a way to do so canonicaly

there is my hack:
diff.txt

I use it like that for exemple for QString:

namespace cereal /*QString*/{
template <> struct SkipPrologFlag<QString>{};
template <class Ar>
inline void save(Ar& ar, const QString& str){
	ar.saveValue(str.toStdString());
}
template <class Ar>
inline void load(Ar& ar, QString& str){
	std::string tmp;
	ar.loadValue(tmp);
	str=QString::fromStdString(tmp);
}
}